MIT510, MIT520, MIT1020,

S1-552, S1-554, S1-1052 S1-1054

High Voltage Insulation Testers.

Issue 2
Date 17/08/06
COPYRIGHT © MEGGER LIMITED
6172-999
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Contents Page

Section 1 Safety Warnings and Hazards. 3

Section 2 Instrument Assembly and Disassembly. 4

Section 3 Battery charge calibration. 11

Section 4 Circuit Description Block Diagrams. 13

Section 5 Circuit Diagrams 20

Section 6 Component Layouts 57

Section 7 BOM’s 66

Section 8 Test and Calibration Specs. 80

Appendix 1 Common Faults. 81

Appendix 2. Firmware Error Codes. 82

Appendix 3 Firmware Updates. 83

Appendix 4 Spare Parts List. 84

2
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Section1 Safety Warnings and Hazards.

Warning: These instruments generate high voltages. The MIT510 and MIT520 are 5kV insulation testers. The
MIT1020 is a 10kV instrument. Only trained and qualified persons should service this product after a risk
assessment.

The copyright to this document is owned by Megger Ltd. This document must not be copied or reproduced in whole
or part without the prior written consent of the copyright owner.

3
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

The insulation tester models differ in the following ways:

a. The MIT520 has ‘USB’ capability and additional keys for added functionality.
b. The MIT1020 has ‘USB’ capability and a different ‘HV’ Board from the ‘5 series’ models. It also has
additional keys for the added functionality.
c. The S1-552 and S1-554 are the same build as the MIT520 and MIT1020 respectively, but provide a
higher output current (selected in firmware).
d. The S1-554 and S1-1054 are the same build as S1-552 and S1-1052 respectively, but are fitted with
a different measurement board to provide increased noise current filtering. Additional filtering menus
are also available in the firmware

Section 2 Instrument Assembly and Disassembly. Page

2.1 MIT510/520 & 1020 Assembly. 5

2.2 MIT510/520 & 1020 Disassembly. 6

2.3 MIT510/520 & 1020 Assembly Numbers 6

2.4 MIT510/520 & 1020 Drawings. 8

2.5 Interconnect Diagrams. 10

4
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

MIT Assembly. (Refer to Assembly Drawings)

2.1 Front Panel assembly.

1. Fit springs to high voltage shutter sockets and locate into recess of raised socket moulding guides.
2. Screw down shutter cover over shutter sockets.
3. Locate and screw down Power board into case bosses.
4. Locate Serial board into boss slots.
5. Screw down one fixing plate (nearest shutter cover) to hold one side of board in place.
6. Snap fit ‘IEC’ socket into front panel. Solder wires of ferrite/3 way Molex (see WACL 6140-388) assembly to ‘IEC’ socket.
Connect 3 way Molex socket to Power board.
7. Secure ‘tywraps’ to ferrite and screw down via second fixing plate onto other Serial board boss slot.
8. Place Perspex window into front panel recess.
9. Fit light pipes into front panel.
10. Locate rubber keypad moulding and affix onto front panel.
11. Locate and screw down Keyboard assembly into case bosses.
12. Locate and screw down Display board into case bosses.
13. Connect Power board to Display board, Serial board to Display board, Keyboard to Display board ribbon cables.
14. Affix to front panel; high voltage terminal indication label, mains input voltage limits label, and communication input/output
label.
15. Locate and fix plastic communications cover.

Module Housing Base and Module Housing Cover Assembly.

1. Locate and fix transformer assembly with cable tie.

2. Locate and screw down ‘Hv’ board into case bosses. Fit crimped ‘0v’ bond wires to tabs on ‘Hv’ board.
3. Place ‘Hv’ socket connector into housing cover terminal near communication recess. Place over bottom of connector a washer,
leakage spring, guard plate and socket mount. Secure these to cover terminal with 2 screws. Place crimp ring on brown wire
with ferrite (WACL 6140-388) onto bottom of connector and tighten on with washer and nut. Locate another ‘Hv’ socket into
next terminal socket through guard plate and secure crimped brown wire by tightening with washer and nut. Locate final ‘Hv’
socket into last housing cover terminal, place crimp ring on blue wire with ferrite (WACL 6140-388) onto bottom of connector,
fasten on with washer and nut.
4. Fit fuse to battery lead assembly (6180-454). Fit battery lead assembly to battery, fused lead fitted to positive terminal. Lower
battery into module base battery compartment, with battery positive terminal closest to base bottom; the battery terminals
facing the base module side.
5. Connect isolation transformer cable terminated in 2 way Molex to power board, connect the other crimped wires to matched
terminals on ‘Hv’ board. Connect battery cable to power board.
6. Connect Measurement board ribbon to ‘Hv’ board.
7. Locate and screw down measurement board onto ‘Hv’ board spacers.
8. Connect crimped wire between tab labelled ‘MB’ on Measurement board and ‘Hv’ board tab near where the isolation
transformer wires have been fitted to the ‘Hv’ board. Connect crimped ‘0v’ bond wires between Measurement board and ‘Hv’
board.
9. Fit blue wire on housing cover to ‘Hv’ board, shown as W5 on assembly drawing. Fit other brown wires on housing cover to
Measurement board. The middle brown wire on housing cover goes to tab screen printed ‘G’, and the other connects to tab
screen printed ‘Lo’.
10. Locate and fasten down module housing cover onto module base.

Fitting case together.

to Measurement board 13497-100

1. Locate and screw down front panel onto module base.

2. Slide case lid onto base module hinges.

5
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

2.2 Disassembly is reverse of assembly.

1. Unscrew front panel.
2. If the front panel is to be removed from the module housing base, disconnect the battery and isolation transformer cables from
the power board assembly, otherwise rest the front panel down beside the module housing case.
3. Unscrew the module housing cover. If the module housing is to be removed, pull off the three crimped wires screwed down on
the module housing cover from their respective tabs on the measurement and ‘HV’ board. Otherwise angle the module housing
cover towards the lid and rest it on the module base.
4. To remove the measurement board, remove all crimped wires attached to measurement board, disconnect ribbon going to ‘HV’
board and then unscrew the measurement board from ‘Hv’ board spacers. Remove measurement board.
5. To remove the ‘HV’ board disconnect the crimped wires from the isolation transformer and unscrew from case bosses. Remove
‘HV’ board.
6. To remove the isolation transformer, disconnect 2 way Molex connector from power board, cut mounting cable tie, and pull off
panel mounted cable tie securing ferrites.
7. To remove battery, disconnect battery cable to power board, and slide it out of the battery housing compartment.
8. To remove power board assembly, disconnect all cables left on the power board. Unscrew the board from front panel bosses.
9. To remove display board assembly, remove all ribbon, and unscrew the board from front panel bosses.
10. To remove keyboard, unscrew from front panel.
11. To move serial ‘coms’ board, unscrew fixing plates and slide board from boss guides.

2.3 Assembly Numbers.

MIT510 insulation tester 6411-093
MIT1020 insulation tester 6411-092
Mechanical Drawing Assembly PDF No. 6411-092
MIT510/1020 keyboard PCB 5240-432
MIT510/1020 power PCB 5240-431
MIT510 high voltage PCB 5240-430
MIT1020 high voltage PCB 5240-429
MIT510/1020 measurement PCB 5240-428
MIT510/1020 display PCB 5240-433
MIT510 serial interface PCB 5140-988
MIT520/1020 serial interface PCB 5140-987

Assembly Drawing List

6430-861 MIT510/1020 Display Board Assembly.
6231-756 MIT510 Serial Interface Board Assembly.
6231-758 MIT520/1020 Serial Interface Board Assembly.
6231-716 MIT510/1020 Key Board Assembly
6331-804 MIT510/1020 Power Board Assembly.
6430-865 MIT510/520 5kv Module Assembly.
6430-864 MIT1020 10kv Module Assembly.
6231-766 MIT510/1020 Isolation Transformer.

Cable Forms WACL 6140-388

Keyboard to Display board 30 way ribbon 13497-095
Power board to Display board 14 way ribbon 13497-100
Serial board to Display board 14 way ribbon 13497-100
HV board

6
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

2.4 Assembly Drawings.

7
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

8
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

2.5 Interconnect Diagram for MIT510/MIT520 models

Note: The W numbers shown on this diagram are not the same as W numbers on assembly drawings.

Front Panel

Display Board
Keyboard W1 Assy 6430-861 W2
Assy 6231-716 Pcb 5240-433
Pcb 5240-432 Serial Board
Assy 6231-756
Pcb 5140-988

W4

Power Board W3
Assy 6331-804
Pcb 5240-431 IEC Plug
25960-117

W5 W6 W7 W8

Meas Board Battery 12v 4Ahr Isolation Tx

Pcb 5240-428 Assy 6180-454 Assy 6231-766
25985-030
W9

W10

W11

W12

W1 13497-095
W2 13497-100
W3 6140-388
HV Board W4 13497-100
Pcb 5240-430 W5 6140-388
W6 6140-388
W7 6140-388
W8 6180-454
5kVHVAssy 6430-865 W9 13497-100
W10 6140-387
W11 6140-387
W12 6140-387

Note: The 520 Model uses serial board Assy 6231-758, Pcb 5140-987

9
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Interconnect Diagram for MIT1020 models.

Note: The W numbers shown on this diagram are not the same as W numbers on assembly drawings.

Front Panel

Display Board
Keyboard W1 Assy 6430-861 W2
Assy 6231-716 Pcb 5240-433
Pcb 5240-432 Serial Board
Assy 6231-758
Pcb 5140-987

W4

Power Board W3
Assy 6331-804
Pcb 5240-431 IEC Plug
25960-117

W5 W6 W7 W8

Meas Board Battery 12v 4Ahr Isolation Tx

Pcb 5240-428 Assy 6180-454 Assy 6231-766
25985-030
W9

W10

W11

W12

W1 13497-095
W2 13497-100
W3 6140-388
HV Board W4 13497-100
Pcb 5240-429 W5 6140-388
W6 6140-388
W7 6140-388
W8 6180-454
10kVHVAssy 6430-864 W9 13497-100
W10 6140-389
W11 6140-389
W12 6140-389

10
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Section3. Battery charge calibration

A battery calibration charge sequence will need to be carried out after the following:

1. A new instrument has been fully assembled for the first time.

2. An instrument’s battery has been replaced.

3. An instrument’s display board has been replaced.

4. An instrument’s power supply board has been replaced.

The battery charge calibration procedure is as follows:

The charge sequence.

1. Switch on the unit and wait for the instrument to complete its initialisation. Note, if the battery becomes
disconnected for any reason during or after assembly briefly apply the mains to reset the battery circuit.

2. If mains power is not connected the instrument screen displays ‘bat’ and ‘start charge’. This instructs the user
to connect the instrument to mains power.

3. With mains power connected, the green ‘led’ next to the ‘on/off’ switch is lit, the screen displays ‘bat’ and the
segments of the battery monitor bar graph light sequentially indicating the battery is being charged.

4. After a charge period of 14 hours the instrument then enters a rest state for 2 hours. In this state the instruments
screen displays ‘bat’ and ‘resting bat’.

5. After the 2 hour rest period has elapsed the instrument screen displays ‘bat’ and ‘end charge’. The green ‘led’
flashes. This message remains on the screen until the mains power is disconnected.

6. When mains power is disconnected the screen displays ‘bat’ and ‘switch off’. The operator should now switch
the instrument off.

The discharge sequence.

1. Switch the instrument back on. The instrument screen displays ‘bat’ and ‘discharging’. The instrument remains
in this state for 15 minutes.

2. After the 15 minute period has elapsed, the instrument screen displays ‘switch off’. The operator should now
turn the instrument off. Battery calibration is now complete.

An instrument can be put into battery calibration mode at any time by connecting up a PC to the instrument
front panel RS232. Open the programme ‘S1-5XX, S1-10XX Test and Calibration Software’ and press the ‘Recal
Battery’ button. Switch the unit back on and follow the sequence described above.

The software is available for download from the Megger Limited website part number (6111-759). Support files for
this will have to be downloaded from the Microsoft™ website. A CD version (including the necessary support files) is
available on request.

11
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Blank Page

12
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Section 4. Electronic Circuit Description. Page

4.1 Power Board. 14

4.2 Display Board. 14

4.3 Key Board 14

4.4 Comms Boards. 15-16

4.5 Measurement Board. 17

4.6 ‘Hv’Board. 18

Note: Block diagrams provide an over view of a circuits function. For more detail consult circuit diagrams in
this service manual.

13
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Power Board, Display Board and Key Board Block Diagram.

HVModule Battery Mains

Battery Charger
Protect

Iso Tx
Isolation Switch Reg
Tx Off Line Reg
Emc Filter

Battery Volts
Monitor
PSUBoard

DC Power and
Backlight supply Lcd and
Driver
Micro circuitry

EEProm

Rs232/USB
Power on and Board
watchdog

IRDAComs

Display Board

Buzzer Keypad matrix Leds

Key Board

14
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

USB/RS 232 3.3 USB RS 232 level

USB Connect Convertor Translate RS232 Connect

USB Tx Tx

USB Rx Rx

USB detect

Buffer Level
Translate

Or gate
USB
EEprom
Switch

3.3 3.3 USB

Instrument
Connect

The MIT510 serial board has the facility for USB communication, but the MIT510 instrument does not use USB communications.

15
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

3.3v iso

Isolated Comms Iso Tx +10v iso

Regulate &
-- rail generate

--10v iso
RS 232 Buffer & RS232 Level Translate
Iso Tx Drive & + rail generate
Opto
Rx

Tx

RS232 Connect
USB/RS232
Convertor
USB Connect
Buffer Level
Or gate
Translate
USB Rx

USB Tx

USB detect
Instrument
Connect

Switch

3.3v USB 3.3v iso

16
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Attenuated ‘Hv’
From ‘Hv’ board
Ac Detect To ‘Hv’ board
A1 Discharge on/off
M icro ‘Hv’ on/off
Set ‘Hv’
Break Down Detect Set current limit
A2

Guard OK
G A3

Current Overrange
Fuse A9

0v Power on,
Watchdog and
Filter Flash circuit

High
M edium

M eas Board Low

IRDA Coms

__
A4 A5 A6
I meas

ADC
0v
Cap meas
A7

Attenuated ‘Hv’ from

Discharge
Discharge path

0v
Terminal volts meas
A8

17
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

5240-429-A7 & below

5240-430-A9 & below
HV Control Board
Feedback
Capacitance meas
To ‘Meas’ board
Set ‘Hv’ from
‘Meas’ board
To ‘Meas’
board Attenuator Attenuator

Current Limit

Discharge

Pulse Width
Oscillator Modulator

‘Hv’ on/off
Discharge on/off
From ‘Meas’ board

18
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

HV Control Board
Feedback 5240-429-A8 & above
5240-430-A10 & above Capacitance meas
To ‘Meas’ board
Set ‘Hv’ from
‘Meas’ board
To ‘Meas’
board Attenuator Attenuator

Current Limit

Discharge

Pulse Width
Oscillator Modulator

‘Hv’ on/off
Discharge on/off
From ‘Meas’ board

19
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Section 5 Circuit Diagrams. Pages

5.1 Display Circuit Diagrams. 20 - 27

5.2 Keyboard and Engineering Board Circuit Diagrams. 28 - 31

5.3 Interface 10 & 20 Circuit Diagrams. 32 - 34

5.4 Isolated Interface Circuit Diagrams. 35 - 37

5.5 Power Supply Circuit Diagrams. 38 - 42

5.6 Measurement Circuit Diagrams. 43 - 50

5.7 5KV Generator Circuit Diagrams. 51 - 53

5.8 10KV Generator Circuit Diagrams. 54 - 56

20
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Controller
Compiled:
Page 2 To Comms interf ace
Display Page 3 ComIDbit[0..2]
LcdData[0..8] ComIDbit[0..2]
LcdData[0..8] LcdData[0..8] 0V 1
LcdAddr[0..2] 5V 2
LcdAddr[0..2] LcdAddr[0..2] ComIDbit2 3
LcdBP[1..4] ComIDbit1 4
12VSwitched LcdBP[1..4] LcdLatchEnable LcdBP[1..4] ComIDbit0 5
LcdLatchEnable LcdLatchReset LcdLatchEnable R1 R2 6
5V LcdLatchReset LcdBiasDisable LcdLatchReset 100K 100K 7
LcdBiasDisable MeterCoarse LcdBiasDisable 8
MeterCoarse MeterFine MeterCoarse 9
MeterFine MeterFine 5V IC1 (TxD1) 10
12VSwitched 5 1 (RxD1-coms) 11
5V VCC B 2 (RxD1-edge) 12
0V & A 5V
5V Comms1 (RxD1) 4 3 13
Y GND TP6 14
SK30
TP331
0V 74AHCT1G08GW 0V
5V
0V /Eng_mode
/Eng_mode UP_OK
0V UP_OK
Connection to TP332 EXTRST 20 19
instrum ent PowerSignals&RangeLeds Page 7 EXTRST 18 17 CNVss

Comms[1..4]
<-KEY->
5V(led) TP7 16 15
Range250V Comms2 (TxD1) 14 13
5V(led) Range250V Range500V Range250V Comms4 (TxD0) 12 11 5V
Range500V Range1000V Range500V Comms3 (RxD0) 10 9
Range1000V Range2500V Range1000V IRDALink2 (TxD2) 8 7 12V
SK29 Range2500V Range5000V Range2500V Comms[1..4] IRDALink1 (RxD2) 6 5
14 12V Range5000V NoiseLed Range5000V IRDALink[1..2] 4 3
13 NoiseLed NoiseLed IRDALink[1..2] IrDA & Backlight IrdaEn 2 PL13 1
12 EnableBattery Volts 12V(BL) 0V
11 EnableBattery Volts EnableBattery Volts IRDALink[1..2] Edge connector
10 5V(IrDA) IrdaEn
12V(BL) f or STD board
To power board

9 ChargerOf f Battery ChargeDisable

8 BattMon ChargerOf f Battery ChargeDisable Battery Volts Battery ChargeDisable /Backlight 5V(IrDA) To Key board
7 Charging BattMon Battery Volts Battery Volts /Backlight /Backlight FnKey - 30
6 MainsOn MainsDetect 0V(IrDA) 0V(led) 29
5 IsoSupply Of f MainsOn MainsDetect MainsDetect 0VS BuzzerDrv 28
4 0V(IrDA) 0VS Hv LedDrv 27
3 0V Page 4 OnOf f Switch 26
2 0V ProgLedDrv 25
1 0V(led) 5V(led) Key boardSignalConv ersionPage 5 StartStopKey - 24
0V(led) MainsLedDrv 23
0VS 5V(led) PA0 22
MainsLedCtl BuzzerDrv COL0 21
PowerManagement Page 6 12VSwitched MainsLedCtl ProgLedCtl MainsLedCtl PA1 20
0VS ProgLedCtl Hv LedCtl ProgLedCtl Hv LedDrv COL1 19
12VSwitched 12V(BL) Hv LedCtl BuzzerCtl Hv LedCtl PA2 18
BuzzerCtl BuzzerCtl ProgLedDrv COL2 17
12V(BL) 5V CNVss PA3 16
TP333 MainsOn Charging MainsLedDrv COL3 15
5V 5V(led) 0V 14
IsoSupply Of f 13
5V(led) 5V(IrDA) 0V 12
0V 11
SK1 5V(IrDA) 10
PA[0..3] 9
12V PowerOf f PA[0..3] 8
PowerOf f IsoSupply En PowerOf f 7
SK5 0V IsoSupply En OnOf f Key - IsoSupply En COL[0..3] 6
OnOf f Key - SwitchedOnSink- OnOf f Key - COL[0..3] 5
0VS SwitchedOnSink- SwitchedOnSink- 4
0V(led) WDTKicking FnKey - 3
0V(IrDA) WDTKicking MonoReset WDTKicking StartStopKey - 12V 2
MonoReset CNVss MonoReset 1
0V(led) CNVss CNVss
0V(IrDA) OnOf f Switch SK2
<Variant Name>
MEGGER LIMITED Document Number
Archcliffe Road, Dover, 6270-299
Kent, CT17 9EN, England
Title
Display PCB - Top Level
Instrument: MIT510/520/1020 Issue Date CN No.
Drawn By : James Patten 10 14-10-2005 22482
Date: Wednesday , March 17, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A4 Sheet 1 of 8

21
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Components f itted in model 10A only .

TP194 TP195

TP196 TP197 TP198 5V(led)

MainsDetect
R24
TP200 1K TP199 R98
SK10 1K
TP201
R16 TR27
MainsOn BCW32
TR12 TR6 330R
Range250V BCW32 BCF29 250V Range Led (y ellow) R113
R31 10K

HLMP-1440
10K R111
33K
0V
R9 D9
330R

0V(led)
0V
TP202 TP203 5V(led)
TP204 R23
1K
TP207 SK11 TP205 TP206
TP208
R15
TR11 TR5 330R
Range500V BCW32 ChargerOf f Battery ChargeDisable
BCF29 500V Range Led (y ellow)
R30 R123

HLMP-1440
10K 1K
R124
0V 10K
R8 D8
330R

0V(led)
TP209
TP210 TP211 5V(led) 0V

R22
1K
TP212 SK12
TP213
R14
TR10 TR4 330R
Range1000V BCW32 BCF29 1000V Range Led (y ellow)
R29
TP214

HLMP-1440
10K
TR16
0V BCF29
R7 D7 Battery Volts
BattMon
330R

0V(led) TP2
TP215 TP216 TP217
5V(led) R76
33K TP4
R21
TP218 1K
SK13
TP219
R13 R60
TR9 TR3 330R 33K
Range2500V BCW32 BCF29 2500V Range Led (y ellow)
R28
HLMP-1440

10K TP1
TP3 TP220
0V
R6 D6
330R TR15
BCW32 EnableBattery Volts
0V(led) R86
TP221 TP222 TP223 R75 33K
5V(led) 33K

R20
1K
TP224 SK14
TP225 5V(led)
R5
TR8 TR2 330R 0V
Range5000V BCW32 5V(led)
BCF29 5000V Range Led (y ellow)
R27
HLMP-1440

10K
0V
0V
R12 D5
330R 0V
Model ID SK16 SK23 250V led
0V(led)
TP226 TP227 TP228 PL14 0V(led)
Meter + SK17 SK24 500V led
5V(led) 1 2
Meter - SK18 3 4 SK25 1000V led
R19 5 6 0V(led)
1K 5V back light SK19 7 8 SK26 2500V led
TP229 SK15 9 10
TP230 Sink back light SK20 11 12 SK27 5000V led
R11 13 14
TR7 TR1 330R Spare SK21 SK28 Noise led <Variant Name>
NoiseLed BCW32 BCF29 Noise Led (red)
R26 MEGGER LIMITED Document Number
HLMP1340

10K Archcliffe Road, Dover,

6270-299
Not f itted Kent, CT17 9EN, England
0V Title
R4 D4 0V 0V(led) Display PCB - Power Signals & Range leds
330R
Instrument: MEG05/10, models -10, -20 Issue Date CN No.
0V(led) Drawn By : James Patten 10 14-10-2005 22482
Date: Tuesday , July 13, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A3 Sheet 7 of 8

22
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By:
Keep track lengths as short as possible
Compiled:
TP254

C80
R292 10M 10nF

C75 TR38
470u C76 C77 NDS352AP L2
16 100nF 100nF 220uH
12V(BL)
D41
R304
+ 10K MBRS130LT3 + R301
R288 R298 1R
TP245 1K C81 C82 C83 1R
R102 R36 R93
100nF 100nF 470u R293 33R 33R 33R
16 10K TP256
0V(BL)
TP248 0V(BL)
R302
TP255 R299 1R TP152 TP153 TP154
TR39 1R
NDS352AP R294
TP246 10K
IC26 R297
8 1 C79 C84 10K
GND OUT R303
7 2 10nF 100n R300 1R R101 R32 R94
6 RT Vcc 3 R295 1R 33R 33R 33R
TR30 5 DTC COMP 4 10K
2N7002 SCP FB R289 1K R290 1K R291 1K
TP169 R286 TL5001ACD 3 BL1 4 D25 D13 D26

LCD BACKLIGHT

HLMP-1540

HLMP-1540

HLMP-1540
100K 0V(BL)
SK8
/Backlight (5V BL)
TP330 TP257
R296
TP247 + TP249 TP250 TP251 TP252 TP253
10K 2 1 D15 D12 D16

HLMP-1540

HLMP-1540

HLMP-1540
R134 C78 SK9
100K R287 1uF (Sink BL)
100K 25
LKD8
0VS 1 2

Not f itted f or model 10A. Fitted f or model 10A only .

0V(BL)
TP173

5V(IrDA)
5V(IrDA)

R148 R149
10R 10R
TP336 R308
33R

C62 TP94 TP95

10pF

C87
R144 R143
10uF + C88 10R 10R
R164 R305 R156 R157 10 100n
XL2 10K 10K 10K 10K

TP99
4.91 MHz

0V(IrDA) C63 TP98 IC18

10pF 1 14 0V(IrDA)
2 Vdd Vss 13 5V(IrDA)
3 OSC1/CLKIN EN 12
4 OSC2 TX 11 TP96
5 RESET RX 10 TP97

330R

330R

330R
6 RXIR BAUD0 9
7 TXIR BAUD1 8
IrdaEn MODE BAUD2

R141

R142

R147
MCP2120-I/SL

C89 TP102 0V(IrDA)

TP100 100n 1
TP5 2 IRED A 5V(IrDA)
IRED C
0V(IrDA) 3
Txd
+
4 5V(IrDA)
TP101 TP104 5 Rxd D42 C51 C50
6 NC TFDU4100 100nF 10uF
7 Vcc 10
SC 0V(IrDA)
8
TP103 GND
C39
+ 10uF 0V(IrDA)
C41 10
SK3 100n

1 RxD
3
2
1

2 TxD IRDALink1 (RxD2) SC1 0V(IrDA) <Variant Name>

IRDALink2 (TxD2) PL9 1 4
IRDALink[1..2]
Not f itted 2 3 MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England
6270-299
Screening can for Title
Display PCB - IrDA & Backlight
SK4
IrDA tranceiver
Instrument: MEG05/10, models -10, -20 Issue Date CN No.
Drawn By : James Patten 10 14-10-2005 22482
Date: Monday , Nov ember 08, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A3 Sheet 4 of 8

23
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
5V
5V CPU power decoupling
By: 5V Compiled: PL7 PL6 PL5 PL4 PL3 PL2
TP8 TP9 TP10TP14TP15TP16TP17TP18TP21 Engineering Use Only
R41 R103 R40 Debug[0..5]
10R TP11 1R TP12 10R TP13

10K

10K

10K

10K

10K

10K

10K

10K

10K
D1 R3 1K

LcdData2

LcdData3

LcdData4

LcdData5

LcdData6

LcdData7

LcdData8
LcdData0

LcdData1
Debug0
A2dRef CpuVcc A-Vcc

R106

R105

R52

R53

R54

R55

R133

R131

R129
C15 Debug1 LST670-JL D2 R10 1K
100nF C13
+ C30 + 10uF C14 Debug2

StartStopKey-

/Eng_mode
C29 100nF 100nF TP20 LST670-JL

P50(flash)

P64(flash)
16 Debug3
1uF 5V D3 R18 1K

FnKey-
0V
Debug4

PA0

PA1

PA2

PA3
0V R114 LST670-JL
10R Debug5 D11 R25 1K
TP19 0V
5V TP22 TP23
SW2 LST670-JL
SK31 TP24 TP25
100K

100K

100K

100K

R126 IC10 5V R39

8
10K TP26 TP27 10K

Vcc
R79

R118

R117

R116

TP28 TP29 SW1

5 1 C31 C35
SDA A0 2 100n 1n R34
ComIDbit0

ComIDbit1

ComIDbit2

24C256 A1 3 10K
6 A2 7
TP32 SCL WP VARIANT "0"
P25

Vss
TP33 TP34 TP35 TP36
TP30 TP39 5V

4
TP31 5V 5V
5V R80
TP37 0V 10K
R61 R64 R65 R82 R145
TP38 10K 10K 10K 10K D28 1M R140
Engineering use only

0V IC7 N/F N/F N/F N/F NF 1M

100K

100K

100K
100K

C86 CpuVcc 16 TP40 TP41

Vcc MonoReset
10nF 62 SK22 LL4148
A-Vcc 99 Vcc R62 R63 R66 R83 (model ID)
10K

AVcc
R107

R130

R115
R127

A2dRef 98 10K 10K 10K 10K

C85 96 Vref R81
10nF 14 AVss 0R C48
Vss
R128

TP42 N/F N/F N/F 64 72 v ariant bit 3 (MSB) Fitted in model 10A only 100nF
Vss P20/A0(/D0/-) 71 v ariant bit 2 5V
TP43 0V P21/A1(/D1/D0) 70 v ariant bit 1 0V 0V
TP46 SDA P22/A2(/D2/D1) v ariant bit 0 (LSB)
TP44 38 69 0V
SCL 37 P60/CTS0/RTS0 P23/A3(/D3/D2) 68 /model_10A TP47 D31
TP45 Comms3 (RxD0) 36 P61/CLK0 P24/A4(/D4/D3) 67 P25 R151
Comms[1..4] Comms4 (TxD0) 35 P62/RxD0 P25/A5(/D5/D4) 66 UP_OK 5V TP48 1M
P63/TxD0 P26/A6(/D6/D5) UP_OK WDTKicking IC19-1
P64(f lash) 34 65 LcdData8 2 LL4148
FLASH - CLK1 33 P64/CTS1/RTS1/CTS0/CLKS1 P27/A7(/D7/D6) 63 LcdData0 1 RC 6
Comms1 (RxD1) 32 P65/CLK1 P30/A8(/-/D7) 61 LcdData1 4 C Q
Comms2 (TxD1) 31 P66/RxD1 P31/A9 60 LcdData2 5 A
+
IRDALink[1..2] IRDALink2 (TxD2) 30 P67/TxD1 P32/A10 59 LcdData3 LcdData[0..8] 3 B 7 C54 C55
IRDALink1 (RxD2) P70/TxD2/SDA/TA0out P33/A11 LcdData4 LcdData[0..8] RES Q
29 58 100nF 100nF
R45 LcdBP1 28 P71/RxD2/SCL/TA0in/TB5in P34/A12 57 LcdData5 R155 4538
5V LcdBP[1..4] LcdBP2 27 P72/CLK2/TA1out/V P35/A13 56 LcdData6 100K
LcdBP[1..4] LcdBP3 P73/CTS2/RTS2/TA1in/V P36/A14 LcdData7 TP49
26 55 5V TP51
10K LcdBP4 25 P74/TA2out/W P37/A15 54 ComIDbit0 TP50 0V
issue bit 3 (MSB) BuzzerCtl 24 P75/TA2in/W P40/A16 53 ComIDbit1 R146
BuzzerCtl P76/TA3out P41/A17 ComIDbit[0..2]
issue bit 2 23 52 ComIDbit2 47K IC21-1 10 >=1
PCB ISSUE "0" issue bit 1 22 P77/TA3in P42/A18 51 ProgLedCtl 0V 2 8
P80/TA4out/U P43/A19 ProgLedCtl D29 RC IC20-3
issue bit 0 (LSB) 21 88 Debug0 1 6 9
OnOf f Key - 20 P81/TA4in/U P00/D0 87 Debug1 4 C Q 74HC32
OnOf f Key - StartStopKey - P82/INT0 P01/D1 Debug2 Debug[0..5] A
5V 0V TP334 19 86 5V 5 +
StartStopKey - FnKey - P83/INT1 P02/D2 Debug3 B
18 85 LL4148 3 7 13 >=1
FnKey - P85(f lash) P84/INT2 P03/D3 Debug4 RES Q
R306 17 84 IC20-4 11
10K PA0 11 P85/NMI P04/D4 83 Debug5 4538 12
R104 PA1 10 P86/Xcout P05/D5 82 IsoSupply En R150 D30 74HC32
PA[0..3] PA2 P87/Xcin P06/D6 SwitchedOnSink- IsoSupply En
10K 7 81 1M 0V
PA3 6 P90/TB0in/CLK3 P07/D7 80 LcdLatchEnable SwitchedOnSink- TP54
TP52 Range250V P91/TB1in/Sin3 P10/D8 LcdLatchReset LcdLatchEnable
5 79 TP55 LL4148 C49
Range250V MeterFine P92/TB2in/Sout3 P11/D9 issue bit 3 (MSB) LcdLatchReset TP53
4 78 100nF 3
TP56 TP57 TP58 TP59 MeterFine MeterCoarse P93/DA0/TB3in P12/D10
3 77 0V
MeterCoarse Range500V P94/DA1/TB4in P13/D11
2 76
Range500V Range1000V P95/ANEX0/CLK4 P14/D12 LcdBiasDisable
1 75 0V

>=1
Range1000V P96/ANEX1/Sout4 P15/D13/INT3 LcdBiasDisable IC20-1
Range2500V 100 74 MainsDetect C53 C52 TP60
COL0 Range2500V COL0 P97/ADtrg/Sin4 P16/D14/INT4 PowerOf f MainsDetect 74HC32
97 73 100nF 100nF TP61
COL1 P100/AN0 P17/D15/INT5 MainsLedCtl PowerOf f
95 50
COL1 COL[0..3] COL2 P101/AN1 P44/CS0 WDTKicking MainsLedCtl 1 2
94 49 0V
COL3 93 P102/AN2 P45/CS1 48 Hv LedCtl 4 TP62
P103/AN3 P46/CS2 Hv LedCtl IC19-2 >=1
COL2 Battery Volts 92 47 /Backlight 14 6
Battery Volts P104/AN4/KI0 P47/CS3 /Backlight RC IC20-2
Range5000V 91 46 P50(f lash) 5V 15 10 5
COL3 Range5000V NoiseLed P105/AN5/KI1 P50/WRL/WR LcdAddr0 C Q 74HC32 TP63 TP64
90 45 12
NoiseLed P106/AN6/KI2 P51/WRH/BHE LcdAddr1 LcdAddr[0..2] A
89 44 11 +
P107/AN7/KI3 P52/RD LcdAddr2 LcdAddr[0..2] B
15 43 5V 13 9
13 Xin P53/BCLK 39 /Eng_mode RES Q
12 Xout P57/RDY /CLKout 40 Battery ChargeDisable /Eng_mode 0V 4538 TP65 TP66
RESET P56/ALE EnableBattery Volts Battery ChargeDisable D40 D33
TP67 8 42 R162 1K
BY TE P54/HLDA EnableBattery Volts
C23 5V 0V 9 41
CNVss P55/HOLD CNVss
33p D39
TP68 TP69
P01102BL LL4148 LL4148
6139-200
R186 0R R169 1K D34
D14 R51 Not f itted C67
10K

XL1 100K PL8 R49 470nF

R183 100K
TP70

3
2
1
10K R184 LL4148
LL4148 680R CNVss
6 MHz

R132

<Variant Name>
1
2
3

0V RESET 0V PL12
MEGGER LIMITED Document Number
C19 0V Not f itted Archcliffe Road, Dover,
TP71 470nF 0V 0V Kent, CT17 9EN, England
6270-299
C22 CNVss Title
33p
EXTRST
R46 Display PCB - Controller
0R
0V RES Instrument: MEG05/10, models -10, -20 Issue Date CN No.
Drawn By : James Patten 10 14-10-2005 22482
Date: Wednesday , March 17, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A3 Sheet 2 of 8

24
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

TP258
TP259
TP260
TP261
4.75V
LcdAddr0 12VSwitched
TP75
16 LcdAddr1 C74
TP74 12VSwitched

SEG71
SEG70
SEG69
SEG68
SEG67
SEG66
SEG65
SEG64
SEG63
SEG62
SEG61
SEG60
SEG59
SEG58
SEG57
SEG56
SEG55
SEG54
SEG53
SEG52
SEG51
LcdAddr2 4.75V 1uF 5V
TP73
V+ 5V

TP262
TP263
TP264
TP265
LcdAddr0 1 4 SEG1
A0 Q0 0V
LcdAddr1 2 5 SEG2 0V

84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
16
LcdAddr2 3 A1 IC5 Q1 6 SEG3 0V
A2 Q2 7 SEG4

C1
C2
C3
C4
S71
S70
S69
S68
S67
S66
S65
S64
S63
S62
S61
S60
S59
S58
S57
S56
S55
Q3 SEG5 V+
74HC259 9
Q4 10 SEG6 LcdAddr0 1 4 SEG33 TP233 SEG1 1 63 SEG50
LcdData0 13 Q5 11 SEG7 LcdAddr1 2 A0 Q0 5 SEG34 R275 10K SEG2 2 NC S54 62 SEG49
DATA IN Q6 12 SEG8 LcdAddr2 3 A1 IC13 Q1 6 SEG35 SEG3 3 NC S53 61 SEG48
Q7 A2 Q2 SEG36 LcdBP[1..4] SEG4 NC S52 SEG47
7 4 60
Q3 9 SEG37 SEG5 5 S1 S51 59 SEG46
RESET ENABLE GND 74HC259 Q4 S2 S50
R199 47K 10 SEG38 LcdBP1 2 -IC24-1 SEG6 6 58 SEG45
R201 47K LcdData4 13 Q5 11 SEG39 Com1 SEG7 S3 S49 SEG44
MCP602 1 7 57

TP266
TP267
TP268
TP269
15 14 8 R203 47K DATA IN Q6 12 SEG40 3 + SEG8 8 S4 S48 56 SEG43
R205 47K Q7 TP234 SEG9 9 S5 S47 55 SEG42
0V R207 47K SEG10 10 S6 S46 54 SEG41
RESET ENABLE GND S7 S45

TP274
TP275
TP276
TP277
4.75V R209 47K R200 47K R276 10K SEG11 11 LC1 53 SEG40
R212 47K R202 47K SEG12 12 S8 S44 52 SEG39

TP270
TP271
TP272
TP273
R214 47K 15 14 8 R204 47K SEG13 13 S9 S43 51 SEG38
16
R206 47K SEG14 14 S10 S42 50 SEG37
0V R208 47K LcdBP2 6 SEG15 15 S11 S41 49 SEG36
V+
-I C24-2
R210 47K 7 Com2 SEG16 16 S12 S40 48 SEG35
MCP602 S13 S39

TP278
TP279
TP280
TP281
LcdAddr0 1 4 SEG9 4.75V R213 47K 5 + 17 47 SEG34
LcdAddr1 2 A0 Q0 5 SEG10 R215 47K 18 S14 S38 46 Com1
16
LcdAddr2 3 A1 IC4 Q1 6 SEG11 TP235 19 S15 S37 45 Com2
A2 Q2 7 SEG12 R277 10K 20 S16 S36 44 Com3
Q3 SEG13 V+ S17 S35 Com4
74HC259 9 21 43
Q4 10 SEG14 LcdAddr0 1 4 SEG41 S18 S34
Q5 A0 Q0

S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
LcdData1 13 SEG15 LcdAddr1 2 SEG42

NC
NC
NC
NC
NC
NC
11 5
DATA IN Q6 12 SEG16 LcdAddr2 3 A1 IC14 Q1 6 SEG43 LcdBP3 2
Q7 A2 Q2
-IC25-1
7 SEG44 MCP602 1 Com3

22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Q3 9 SEG45 3
74HC259
+
RESET ENABLE GND R216 47K Q4 10 SEG46 TP236
R219 47K LcdData5 13 Q5 11 SEG47
TP282
TP283
TP284
TP285

DATA IN Q6

SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
15 14 8 R222 47K 12 SEG48 R278 10K

Com1
Com2
Com3
Com4
R225 47K Q7
0V R228 47K
4.75V R230 47K RESET ENABLE GND R217 47K
TP290
TP291
TP292
TP293

R232 47K R220 47K LcdBP4 6 IC25-2

TP286
TP287
TP288
TP289
-
R234 47K 15 14 8 R223 47K Com4
16 MCP602 7
R226 47K 5 +
0V R229 47K TP237
V+ 4.75V
R231 47K 5V

TP294
TP295
TP296
TP297
LcdAddr0 1 4 SEG17 4.75V R233 47K
LcdAddr1 2 A0 Q0 5 SEG18 R235 47K 5V
16
LcdAddr2 3 A1 IC3 Q1 6 SEG19 TP85
A2 Q2 7 SEG20 R282 R279 R177
V+ TP84 8
Q3 9 SEG21 10K TP238 10K 100K C65
74HC259 Q4 10 SEG22 LcdAddr0 1 4 SEG49 TR36 100n V+
LcdData2 13 Q5 11 SEG23 LcdAddr1 2 A0 Q0 5 SEG50 BCW32 C71
DATA IN Q6 12 SEG24 LcdAddr2 3 A1 IC15 Q1 6 SEG51 100n R280 MCP602
Q7 A2 Q2 7 SEG52 25 10K IC22-3
Q3 9 SEG53 V-
RESET ENABLE GND 74HC259 Q4 LcdBiasDisable
R236 47K 10 SEG54 R281 R176 100K
R238 47K LcdData6 13 Q5 11 SEG55 10K TP86 4
TP298
TP299
TP300
TP301

15 14 8 R240 47K DATA IN Q6 12 SEG56 2 -

R242 47K Q7 0V 1 0V
TP239 IC22-1
0V R244 47K 3 +
4.75V R246 47K RESET ENABLE GND R237 47K
MeterCoarse
TP306
TP307
TP308
TP309

R248 47K R239 47K MCP602

TP302
TP303
TP304
TP305
16 R250 47K 15 14 8 R241 47K Nominal 2.25V R178
R243 47K 10K
0V R245 47K TP80 TP77 TP240
V+
R247 47K R182 R181 5V

TP310
TP311
TP312
TP313
LcdAddr0 1 4 SEG25 4.75V R249 47K 10K 1K R175 R174 TP87
LcdAddr1 2 A0 Q0 5 SEG26 R251 47K 100K 100K
16
LcdAddr2 3 A1 IC2 Q1 6 SEG27
A2 Q2 7 SEG28 TP76 R179
Q3 SEG29 V+
74HC259 9 3 R285 6 - 10K
Q4 10 SEG30 LcdAddr0 1 4 SEG57 R185 + 1 0R IC23-2 7 0V
LcdData3 13 Q5 11 SEG31 LcdAddr1 2 A0 Q0 5 SEG58 10K 2 - IC23-1 N/F 5 +
DATA IN Q6 12 SEG32 LcdAddr2 3 A1 IC16 Q1 6 SEG59 062 TR35 062 TP92
Q7 A2 Q2 7 SEG60 BCW32 0V R190
Q3 9 SEG61 4.75V TP88 100K SK6
RESET ENABLE GND 74HC259 Q4
R252 47K 10 SEG62 0V (meter +)
R254 47K LcdData7 13 Q5 11 SEG63
TP314
TP315
TP316
TP317

15 14 8 R256 47K DATA IN Q6 12 SEG64

R258 47K Q7
PL11
0V R260 47K 4.75V 4.75V 12VSwitched R189 100K 1
R262 47K RESET ENABLE GND R253 47K TP91 2
R264 47K R255 47K 8 8 8 6 3
TP318
TP319
TP320
TP321

-
R266 47K 15 14 8 R257 47K 7
TP89 TP90 IC22-2
R259 47K V+ V+ V+ 5 +
0V R261 47K + + MeterFine
Meter (800R,
R263 47K IC24-3 IC25-3 IC23-3 MCP602 200uA f .s.d.)
TP322
TP323
TP324
TP325

4.75V R265 47K MCP602 C73 C70 MCP602 C72 C69 062 C66 Nominal 1.25V R191
16 R267 47K V- 1uF 100n V- 1uF 100n V- 100n 10K
25 25
4 4 4
V+
R188 R187
LcdAddr0 1 4 SEG65 0V 100K 100K SK7
LcdAddr1 2 A0 Q0 5 SEG66 0V 0V (meter -)
LcdAddr2 3 A1 IC17 Q1 6 SEG67 R192
A2 Q2 7 SEG68 330R
Q3 9 SEG69 0V
74HC259 Q4
LcdAddr[0..2] 10 SEG70
LcdAddr[0..2] Q5
LcdData8 13 11 SEG71 0V
LcdData[0..8] R139 4.75V DATA IN Q6 12 4.75V 1 per 75HC259 TP72
LcdData[0..8] Q7
10K SEG72 Components f itted in model 10A only .
LcdLatchEnable
LcdLatchEnable RESET ENABLE GND R268 47K MEGGER LIMITED Document Number
LcdLatchReset R269 47K Archcliffe Road, Dover,
LcdLatchReset 6270-299
TP326
TP327
TP328
TP329

15 14 8 R270 47K C45 C44 C43 C42 C5 C6 C7 C46 C8 Kent, CT17 9EN, England
R138 R271 47K 10nF 10nF 10nF 10nF 10nF 10nF 10nF 10nF 10nF Title
10K 0V 0V R272 47K Display PCB - Display
R273 47K 0V
R274 47K Instrument: MEG05/10, models -10, -20 Issue Date CN No.
Drawn By : James Patten 10 14-10-2005 22482
Components not f itted in model 10A. Date: Tuesday , March 16, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A3 Sheet 3 of 8

25
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Keep track lengths as short as possible
Compiled: TP131 5V(IrDA) 5V(led)

C4 5V(led)
TR31 R17 10M 10nF
TP134 TP133 2N7002 TP132
12V SW 5V(IrDA)
R152

2
LKD3

LKD1
100K
IsoSupply En C9 TR13
470u C11 C10 NDS352AP L1 5V
16 100nF 100nF 220uH LKD2

1
R159 1 2 5V
1M R153
C58 100R C1
10nF + D10 + 470u R283 R284 R33
TP231
R35 16 1K 1K 10K
TP136 1K C3 C2 R50
0V 100nF 100nF 10K
D38 TR32 TP139
IsoSupply Of f
CNVss 2N7002 MBRS130LT3
TP137 TP140 0V SW TP138 0V SW TR37 R193
D37
LL4148 2N7002 10K TP141
TP243 2V5Ref
TP135 IC27
8 1 C17 R194
LL4148 7 GND OUT 2 100n 10K
0V SW 6 RT Vcc 3
R163 5 DTC COMP 4 C12
C61 1M SCP FB 10nF R42 1K R43 1K R44 1K
10nF R37 TL5001ACD
100K R195
10K
0V
TP144 TP232

C68 R47
TP145 TP146 TP147 TP148 TP143
5V R38 + 2.2uF TP244
10K R48
100K 10K C18
16
10nF
TP149 R309
10K
D36 0V SW LKD4
SwitchedOnSink- TP142 1 2 12V(BL)
OnOf f Key -
LL4148
LKD5 12V SW
TR14 1 2 12VSwitched
NDS352AP
12V LKD6
1 2 12VSwitched
12V
TP151
C40 C21
12VSwitched 100nF + 100u
R85 R57 R56
TP155 63 TP150 1K 1K

R136
TP158
TP156 6 0V 33K
10K S 5V TP159
TP157 2V5Ref 5 1 TP160 TP161
LM339 D Q
D27 IC9-1 TP162
6 R161 1K
- 4013
1 3 2 R158 5V R59 R58
Y >C Q
PowerOf f 7 100K R154 1K 1K
+IC12-2
R

LL4148 D32 1M
R160 D35
4

TP164 & & 5 IC12-1 TP163 4538 1K

1 12 + 2 LL4148 14 TR33 TP165
1 IC8-1 3 12 IC8-4 11 4 Y 15 RC 10 BCW32
BZX84C3V0
OnOf f Switch 3 11 - C Q
2 13 12
2 13 LM339 11 A
100K

100K

+
B

LST670-JL
4093 4093 13 9 C20
RES Q TP170 100n
D22 R73 2V5Ref
R137

R72

10K C57 IC21-2 R171 D17

C24 TP167 R135 TP168 470nF 100K TP166
LKD10 100nF 100K LL4148 TP171
1 2
0VS
LKD11 0V
1 2 0V(led)
TP176
LKD9 0V(led) 0V TP172 C25
1 2 0V(IrDA) 100nF 12V
TP175
LKD7 0V(IrDA) MonoReset
1 2 R122
330R TP177
MainsOn
0V SW
TP174 12VSwitched
TP179 TP178
C37 5V
12V D20 100nF

14

14

16
12V TP188 TP193 R112

16
14

Vcc

VCC
R110 LL4148 33K 3

VCC
33K TP180 C47 C60 C59 C56
IC8-5

VCC
IC9-3 Vcc
TP181 TP184 4093 100n V+ 100n 100n 100n
4013
R109 R120 TP185 TR24 4538

GND

GND
& IC20-5
33K TP187 TP183 8 10K BCW32 + IC12-5 4538

GND
8 IC8-3 10 LM339 74HC32

GND
C27 9 10 R121 C38 C32 C34 V- GND
&

7
8

TP182 5 100nF TP189 9 100K 100n 100n 2.2uF IC19-3

5 IC8-2

8
4 4093 R307 TP192 16 12 IC21-3 7
S

8
TP186 6 4 1K 9 13
R119 6 D Q
10K 4093 TR29 IC9-2 0V
D21 BCW32 4013
R84 TP335 11 12 0V <Variant Name>
WDTKicking >C Q
TR28 10K
MEGGER LIMITED
R

BCW32 R108 Document Number

LL4148 TR23 100K LM339 Archcliffe Road, Dover, 6270-299
10

C36 R125 R74 2N7002 10 9 IC12-3 Kent, CT17 9EN, England

10nF 10K C33 1M - 13 + 14 Title
Y Y
10nF 11
+IC12-4
8
- Display PCB - Power management
0V TP190 TP191
LM339 Instrument: MEG05/10, models -10, -20 Issue Date CN No.
CNVss 0V 0V 0V Drawn By : James Patten 10 14-10-2005 22482
CNVss
0V Date: Wednesday , March 17, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A3 Sheet 6 of 8

26
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
TP105 TP106 5V(led)
TP241 TP107 TP108 R77
1K TP109 TP110
R87
R89 330R
D24 10K
ProgLedDrv
TR20 TR19
ProgLedCtl BCW32 BCF29 (Red led)
LL4148

R88
R78 330R
D23 100K

LL4148
TP111
0V

CNVss

D19 TP112 TP113 TP114

5V(led)

LL4148 R68
1K TP115 TP116
TP117 R67
R71 330R
D18 10K
MainsLedDrv
TR18 TR17
MainsLedCtl BCW32 BCF29 (Green led)
LL4148

R70
TP118 R69 330R
100K

Charging

0V

TP119 TP120 5V(led)

TP242 TP121 R91
1K
TP122 TP123
R90
TR22 TR21 330R
Hv LedCtl BCW32 BCF29
Hv LedDrv
R92
10K

0V
R95
330R

TP124

5V(led)

R97
TP125 1K
5V(led) C28 C26 R99
470nF 100n TP126 1K
5V(led) TP127
R100 R96
0V 10K 10R
TR26 TR25
BCW32 BuzzerDrv
BCF29

0V TP128

TP129

0V
BuzzerCtl
MEGGER LIMITED Document Number
Archcliffe Road, Dover, 6270-299
Kent, CT17 9EN, England
Title
TP130
Display PCB - Keyboard Signal Conversion
Instrument: MEG05/10, models -10, -20 Issue Date CN No.
Drawn By : James Patten 10 14-10-2005 22482
Date: Wednesday , March 17, 2004 11 02-11-2005 22500
© MEGGER LIMITED Size A3 Sheet 5 of 8

27
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Keyboard and Engineering board circuit diagrams follow

28
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Keyboard Matrix for -10/-20

V up

SWK1 Time up
PA0 1 2COL0
SWK4
PA1 1 2 COL0

V down
SWK5 Time down
PA0 1 2COL1
SWK7
PA1 1 2 COL1

Backlight Display
ohmsampsbatt
SWK72
PA0 1 2COL2 SWK13
PA2 1 2 COL1

Fn
SWK12
CNTL 1 2
Record
SWK17
PA2 1 2 COL3

MODE
SWK15
PA2 1 2COL0

CNTL
PA0
PA1
PA2
COL0
COL1
COL2
COL3

<Variant Name>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England 6270-297
Title
MIT5&10-10/20 KEYPAD
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: T.Offley-Shore 1 03-11-2004 PCD
Date: Wednesday, February 19, 2003 <Issue2> <Date2> <CN2>
© MEGGER LIMITED Size A4 Sheet 1 of 3

29
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
Inter-board connector
Only pins 1-16 needed for -10/20 Matrix
By: -30
Keyboard Matrix Compiled:
SK1
CNTL 1
2
BuzzerSource 3
HV_WARNING 4 SWK2
5 PA1 1 2 COL0
ProgLed 6
7
MainsLed 8
PA0 9 UP
COL0 10
PA1 11 SWK8
COL1 12 PA0 1 2 COL5
PA2 13 Contrast up
COL2 14
PA3 15
COL3 16 SWK3
PA4 17 LEFT RIGHT PA1 1 2 COL6
COL4 18
PA5 19
COL5 20 SWK9 SWK10

COL6
PA6 21
22
PA0 1 2 COL3 PA0 1 2COL4 Display
PA7 23
COL7 24
RSHIFT 25 DOWN
LSHIFT 26 Contrast down
27 SWK11
28 PA0 1 2 COL2
29 SWK6
+12V 30 PA1 1 2 COL5

TURN ON/OFF
SW1
ESC ENTER
CNTL
PA0 SWK14 SWK16
+12V PA0 1 2COL7 PA0 1 2COL1
PA1
PA2
TEST COL0
SW2 COL1
COL2
COL3
SWK18 SWK19 SWK20 SWK21
PA1 1 2COL1 PA1 1 2COL2 PA1 1 2COL3 PA1 1 2COL4

Programming
/Charging LED
SM1210SR/HG

ProgLed
Red

MainsLed Q W E R T Y U I O P [/{ ]/} 7/& 8/* 9/(

Grn SWK30 SWK32
D1 SWK22 SWK24 SWK26 SWK28 PA3 1 2COL6 PA7 1 2COL0 SWK34 SWK36
PA4 1 2COL0 PA4 1 2COL2 PA4 1 2COL4 PA4 1 2COL6 PA2 1 2COL6 PA3 1 2COL0
SWK23 SWK25 SWK27 SWK29 SWK31 SWK33 SWK35
PA4 1 2COL1 PA4 1 2COL3 PA4 1 2COL5 PA4 1 2COL7 PA3 1 2COL7 PA7 1 2COL6 PA2 1 2COL7

A S D F G H J K L ;/: @/' 4/$ 5/% 6/^

SWK37 SWK39 SWK41 SWK43 SWK45 SWK47 SWK48 SWK50
HV LED PA5 1 2COL0
SWK38
PA5 1 2COL2
SWK40
PA5 1 2COL4
SWK42
PA5 1 2COL6
SWK44
PA7 1 2COL1
SWK46
PA7 1 2COL3 PA2 1 2COL3
SWK49
PA2 1 2COL5

HV_WARNING PA5 1 2COL1 PA5 1 2COL3 PA5 1 2COL5 PA5 1 2COL7 PA7 1 2COL2 PA2 1 2COL4

D3
LSHIFT Z X C V B N M ,/< ./> //? RSHIFT 1/! 2/" 3/#
SM1206SRC SWK52 SWK54 SWK56 SWK58 SWK60 SWK62 SWK63 SWK65
PA6 1 2COL0 PA6 1 2COL2 PA6 1 2COL4 PA6 1 2COL6 PA7 1 2COL4 RSHIFT
1 2 PA2 1 2COL0 PA2 1 2COL2
SWK51 SWK53 SWK55 SWK57 SWK59 SWK61 SWK64
LSHIFT1 2 PA6 1 2COL1 PA6 1 2COL3 PA6 1 2COL5 PA6 1 2COL7 PA7 1 2COL5 PA2 1 2COL1

Cntl 0/) <-

SPACE
SWK70
SWK66 SWK67 SWK68 PA3 1 2COL1
PA0 1 2COL6 PA0 1 2COL6 PA0 1 2COL6 SWK69 SWK71
Buzzer circuit CNTL
1 2 PA3 1 2COL5

BuzzerSource
+

D2 <Variant Name>
LL4148
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
WD2 Kent, CT17 9EN, England 6270-297
Title
MIT5&10-10/20 KEYPAD
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: T.Offley-Shore 1 03-11-2004 PCD
Date: Wednesday, February 19, 2003 <Issue2> <Date2> <CN2>
© MEGGER LIMITED Size A3 Sheet 2 of 3

30
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: TVcc
Compiled:
R17 100.00R TVcc 20 Pin ARM Header
Pin13 Fit for ARM Programmer R19 D10 Fit for ARM Input Pin Mappings
TDO-1
R27 0R
Programmer TVcc ARM ARM MSP430
R51
R18 100.00R R21 0R Pin15
100.00R LL4148 / MSP430 4.70K Wiggler Programmer Programmer
Pin18 1
SK2 R22 1 Programmer 0.063 Parallel Port JTAG Port JTAG Port JTAG Port
Pin1414 1 Pin1 Pin8 R23 0R 0.063 IC9
Pin1515 2 Pin2 Pin19 R29 300.00R 1 5 PL12
Pin1616 3 Pin3 0R Pin2 2 OE VCC 1 2 Pin Number Pin Name Pin Name Pin Name Pin Name
Pin1717 4 Pin4 R25 R26 0R R24 300.00R 3 A 4 TDO / nRST nTRST / TDI 3 4
Pin1818 5 Pin5 Pin11 Pin21 Pin5 GND Y TDI / TMS 5 6
1 Strobe- RST
Pin1919 6 Pin6 74AHCT1G126GW TMS / TCLK 7 8 2 Data0 nURESET- TDI TDI
20 7 Pin7 0R R28 0R R14 100.00R TCLK / GND 9 10
Pin2121 8 Pin8 R30 Pin22 Pin6 TDO-P / RST-P TR1 11 12
Pin2222 9 Pin9 Pin12 BCW32 TDO / RST 13 14
3 Data1 TMS TCK TMS
Pin2323 10 Pin10 R32 0R R33 300.00R nURESET 15 16 4 Data2 TCLK TMS TCK
R13
Pin2424 11 Pin11 0R Pin23 Pin3 100.00R 17 18
25 12 Pin12 1 19 20 5 Data3 TDI Enable
13 Pin13 R34 0R R35 300.00R 0.063
Pin24 Pin4 6 Data4 nTRST TDO > target
0V 0V 0V 7 Data5
0V
TVcc 8 Data6
PVcc 14 Pin ARM / MSP430 Header 9 Data7 pVcc - -
C19 TVcc
Fit for R54
10.00K + 10.00uF Fit for ARM Fit for MSP430 TVcc 10 ACK-
Wiggler IC7 20 1 20 C20 R55 0R R56 Fit for MSP430
74HC244 C22 C21 0.063 35 IC8 100.00n 11 Busy TDO - -
Vcc 100.00n + 10.00uF Vcc 25.00 TDO R57 0R
35 0V 74HC244 nTRST-1 R40 47.00R 0R 12 Paper Empty TDO
Fit for MSP430 1 25.00 nJTAG_EN 1 0V R58 47.00R PL13 R59
EN1- EN1-
Programmer 19
EN2-
TVcc 19
EN2-
R38 47.00R 1 2 13 Select Target Has Power TDO < back
0V 0V R60 47.00R nTRST / TDI 3 4 Fit for ARM
2 18 2 18 THP R36 47.00R TDI / TMS 5 6 0R 14 - enable RST
1 1
R62 100.00R Pin3 4 16 TMS-2 4 16 TMS-1 R61 47.00R TMS / TCLK 7 8
1 1
Pin4 6 14 TCLK-2 6 14 TCLK-1 R37 47.00R TCLK / GND 9 10 15 - THP (Target has power)
1 1
Pin1 TDO-P / RST-P Pin5 8 12 TDI-2 8 12 TDI-1 R63 0R 11 12 nURESET
1 1
TDO-1 11 9 TDO 11 9 TDO-1 13 14 16 - TEST
2 2
RD-1 13 7 RD 13 7 RD-1 0V R39
2 2
Pin6 15 5 15 5 TDO / nRST R64 0R TDO / RST 17 - enable JTAG
2 2
THP 17 3 nTRST-2 17 3 nTRST-1 R41 47.00K Fit for Wiggler
2 2
R65 300.00R TVcc
Pin3 TMS-2 GND GND 47.00R
10
R42
0R 10
C26
100.00pF R66 47.00R
0V Output Pin Mappings for headers
0V 0V 0V 0V
R67 300.00R
R9
10.00K 50.00 Fit for MSP430
14 Pin 20 Pin Only 14 Pin
Pin4 TCLK-2 R43 22.00R 1 C25 C23 C24 TR3 1 TVcc TVcc TDO
Pin10 RD-2 0.063 0V 0V 100.00pF 100.00pF 100.00pF TDO / nRST R68 0R
2N7002
R44 22.00R 50.00 50.00 50.00
1, 2 TVcc TVcc -
R69 47.00R Pin11 TDO-2 2, 6, 8, 10, 14 6, 8, 10, 11, 12, 14, 16, 18, 20 GND GND GND (NC)
Pin12 TDO-1 0V 0V 0V Pin2 R52 0R
R45 22.00R TVcc Fit for Wiggler 3 3 nTRST Logic High TDI
Pin13 TargetHasPower PL14 1.00 0.00
R53
R70 300.00R R46 0R
10.00K 4 GND GND TVcc
1
Pin17 nJTAG_EN Pin9 PVcc 0.063 5 5 TDI TDI TMS
PVcc TVcc

1
2
3
R47 0R 7 7 TMS TMS TCLK

0V 0V
9 9 TCLK TCLK GND
11 13 TDO TDO nRST
12 15 nURESET - -
13 TVcc TVcc TVcc (NC)

SW3
D7 R12
-8V PL5
+12V 0V 1
LST670-JL 1.00K +12V 2
-8V PL1 ON/OFF 0V 3 +12V
1
on_off 2
D5 R10 3 PL8
+12V 0V 1
+5V PL3 +5V 2
LST670-JL 2.00K 1 0V 3 +5V
+12V 1 IRDA_disable 2
3 IRDA DIS
C1 C2 C3
470.00nF 100.00n 1.00n D6 R11 PL15
25 25 50 +5V 1 +5V +5V
/Eng_mode 2 +5V
LST670-JL 1.00K 3 /Eng_mode
+5V 1
C15
PL6 R1 R2 R3 R4 C16
PL2 16 0V 0V 0V
R5 10.00K 10.00K 10.00R 10.00R C27 + 10.00uF
1 2 1 -8V +5V 10.00K 1 1 5 5 100.00n
2 C4 100.00n C5 100.00n 4 3 10.00pF 1 0.063 0.063 0.125 0.125 25.00
Vcc
3 1 2 6 5 +12V XL1 0.063 IC3
4 3 C1+ V+ 8 7 4.91 1 MCP2120-I/SL 14

16

MHz
5 C1- C6 100.00n 10 9 +5V C18 2 Vdd Vss 13 0V 0V
6 4 6 12 11 3 OSC1/CLKIN EN 12

VCC
7 5 C2+ V- 14 13 uP_OK 4 OSC2 TX 11
C2- RESET RX R6 R7
8 0V 16 15 IC6-3 10.00pF 5 10 10.00R 10.00R
RXIR BAUD0 R48
9 C7 100.00n IC1 0V 18 <-KEY-> 17 CNVS 4538 6 9 5 5 100.00R
20 19 7 TXIR BAUD1 8
LTC1383CS

GND
MODE BAUD2 0.125 0.125
PL4 ch1_rx 7 10 0V
1 ch2_rx 14 RO1 RS232 LT1 11 PL9
2 ch1_tx 8 RO2 LT2 9 1 2 RX0 > 0V 0V
RT1 LO1

8
3 ch2_tx 13 12 3 4 RX2>
4 RT2 LO2 5 6 TX0< 1
5 7 8 TX2< 2 IRED A
6 9 10 RX1> 0V 3 IRED C
7 GND 11 12 IRDA_2_rx 4 Txd
8 0V 0 13 14 TX1< 5 Rxd IC4
9 15 15 16 IRDA_2_tx 6 NC
17 18 IrdaInterface_1< 7 Vcc
19 20 IrdaInterface_2> 8 SC
0V 21 22 GND
R8
23 24 100.00R TFDU4100
1 1
+5V 2 IRED A
0.063 IRED C
3
4 Txd
+5V +5V 5 Rxd IC5
0V 6 NC
C8 C9 C10
470.00nF 100.00n 1.00n 7 Vcc
25 25 50 8 SC
C28 GND
CNVS D9 D8 10.00uF + C29
LST670-JL uP OK LST670-JL 100.00n TFDU4100
35.00
25.00 0V

PL10 16 0V
1 0V 0V
2 C11 100.00n C12 100.00n R16 R15
Vcc
3 1 2 1.00K 1.00K
4 3 C1+ V+
5 C1- C13 100.00n
6 4 6
7 5 C2+ V-
8 0V C2-
TR4 TR5
9 C14 100.00n IC2 0V
LTC1383CS CNVS uP_OK
2N7002 2N7002
PL11 IRDA1_rx 7 10
1 IRDA2_rx 14 RO1 RS232 LT1 11
RO2 LT2 R49 R50
2 IRDA1_tx 8 9 10.00K 10.00K
3 IRDA2_tx 13 RT1 LO1 12
RT2 LO2 <Variant Name>
4
5 MEGGER LIMITED Document Number
6 Archcliffe Road, Dover,
7 GND Kent, CT17 9EN, England 6270-297
8 0V 0V 0V 0V 0V Title
9 15
MIT5&10-10/20 KEYPAD
Instrument: MIT5XX & 10XX Issue Date CN No.
0V Drawn By: T.Offley-Shore 1 03-11-2004 PCD
Date: Wednesday, February 19, 2003 <Issue2> <Date2> <CN2>
© MEGGER LIMITED Size A2 Sheet 3 of 3

31
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Interface 10 & 20 circuit diagrams follow

32
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
+5V Components fitted +5V
for Model 20 only
+5V
C26 C27 +3.3V_USB C29
100.00n 100.00n 470.00nF
R39 R4 R40 TP50 25
4.70K 4.70K 10.00K
TP36
TP42 C31
IC11 0V
100.00n
0V 0V 5 1 TR7 C28 16 TP48
IC2 VCC OE 2 BCW32
A 100.00n TP38
5 1 4 3 R41
VCC B Y GND Vcc
2 1.00K 2 1
4 A 3 V+ C1+ 3
Y GND 74AHCT1G126GW C1-
TP43
0V 6 4 TP47
74AHCT1G08GW 0V 0V V- C2+ 5
TP51 C30 C2-
100.00n IC1 C32

10
0V Components fitted for Model 20 only TP37 LTC1383CS 100.00n
TP49
TP52 TP55 10 7 1
+3.3V_USB 11 LT1 RS232 RO1 14 RS232_Tx 2
RS232_Rx 9 LT2 RO2 8 Rx 3
LO1 RT1 SK2
TP44 12 13 4
TP45 LO2 RT2 5
R18 6 RS232
C8 Socket
1.00K 0V 7
1.00n GND
TR2 8
50.00
BCW32 11 9
15
TR3 0V DISCHG

11
BCW32

USB_Rx
R19
R42
1.00K 6.80M
R17 2.00
100.00K 0.25
Components fitted for Model 20 only
0V
0V +3.3V_USB
+5V Safety
discharge
resistor
R11
C25
4.70K R36
1.00n
TP46 1.00K
50.00
TP53 C2 TP41 TP40
1.00n USB_Tx
+5V
50.00
SK1
1 TR1 TR6
2 BCW32 BCW32
instrument
Connection to
TP54 3 R37
uP_RxD1 4 1.00K
FOR MODEL 20
10.00K

R8 10.00K

R10 10.00K

uP_TxD1 5
FOR MODEL 10

NOT FITTED

+3.3V 6 R2
NOT FITTED

TP35 7 1.00K
+5V VR1 8 R38
3 LM1117-3.3 2
R6

9 R1 100.00K
IN OUT IDbit0 10 100.00K
C9 GND C12 IDbit1 11
+ 100.00n 12 + 10.00uF IDbit2 12
C13 25 1 12 13 0V
FOR MODEL 20

FOR MODEL 10
R5 10.00K

R7 10.00K

R9 10.00K

10.00uF 14
NOT FITTED

NOT FITTED

NOT FITTED

16
<Variant Name>
0V TP33TP34 MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England 6270-296
Title
0V Interface PCB 10 & 20
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: Simon Haynes 1 03-11-2004 PCD
Date: Tuesday, June 22, 2004 2 03-02-05 22235
© MEGGER LIMITED Size A4 Sheet 1 of 2

33
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
USB Connector
Nonvolatile memory +3.3V_USB_uP +3.3V_USB
holding USB enumeration +5V_USB TP30
R29
+3.3V_USB PL2 TP13 R25
1 3.00R +1.8V +3.3V_USB_uP
2 30.00R TP32
R15 C17
10.00K 3 22.00pF
R22
8

1 4 50.00 10.00K
C11 IC7 0.063 R30 22 R20 1.50K 1
Vcc

100.00n C18 C19 C20

25
TP39 0.063

4
50.00 1 5 470.00nF 100.00n 1.00n

6
5
A0 SDA DISCHG 30.00R 1 0.063
2 C21 25 25 50

VDD1V8
VCC
VCC
3 A1 24C64 R13 22.00pF 5
7 A2 6 0V 50.00 6 PUR
WP SCL TP23 DP0
22 7 0V
DM0
Vss

1.00K C22 23 IC10

1 0V 24 TEST0 TUSB3410 TP16 TP15 TP12
0.063 XL1 TEST1 23
4

22.00pF
50.00 12.00 26
0V X2 21 USB_Rx

MHz
DTR USB_Rx
20
C23 27 RTS 19
+3.3V_USB X1/CLKI SOUT/IR_SOUT 17 USB_Tx
SIN/IR_SIN USB_Tx
22.00pF 16 TP7
TP6 RI/CP
8

IC8 0V 50.00 15 TP11

NOT FITTED DCD 14
Vcc

DSR TP10
13
1 5 11 CTS TP4 TP9
2 A0 SDA 10 SCL
3 A1 24C64 SDA
7 A2 6 +3.3V_USB_uP 32
WP SCL TP29 P3_0 +3.3V_USB_uP
31 22 TP18
TP20 P3_1 CLKOUT
Vss

30
TP17 P3_3
R23 R26 29 R21 10.00K
TP19 P3_4
15.00K 30.00K D2 1 12
VREGEN WAKEUP
4

LL4148 TP21
2 1 0.063
9 SUSP

GND
GND
GND
0V RESET
TP5

+ C6

18
28
+5V 1.00uF

8
TP8 TP22
25.00

0V
TP104 TP103 TP102 TP101 TP100
Prog 5V 0V SCL SDA RESET +3.3V TR5 +3.3V_USB Components fitted for Model 20 only
BCF29

On board programming test pads - see notes

Not Fitted (NF) List (Model 10)
R35 C2, C6, C8, C9, C11, C12, C13, C15, C16, C17
10.00K TP28 C18, C19, C20, C21, C22, C23, C25
D2, D3
1 IC7, IC8, IC10
R33
R32 100.00K PL2
R31 1.00M R1, R2, R5, R8, R9, R11, R13, R15, R17, R18,
Two ways of programming - fit a preprogrammed 10.00K R28 R19, R20, R21, R22, R23, R25, R26, R27, R28
R29, R30, R31, R32, R33, R34, R35, R36, R37
DIL, or fit an SO8 and program on board. 4.70K R38, R41
TR1, TR2, TR3, TR4, TR5, TR6, TR7
TP27 VR1
If a 5V programmer is used then the signals XL1
should be passed through a small pcb inserted +1.8V
into the programmer's zif socket. This pcb TP26 TP31 <Variant Name>
would condition the signals to enable 3 volt C15
programming without damaging IC10. 10.00uF MEGGER LIMITED Document Number
16 Archcliffe Road, Dover,
R27 TR4 + Kent, CT17 9EN, England 6270-296
100.00K BCW32 R34 Title
100.00K C16 Interface PCB 10 & 20
D3 100.00n
BAS16 50.00 Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: Simon Haynes 1 03-11-2004 PCD
0V USB Present Date: Tuesday, June 22, 2004 2 03-02-05 22235
© MEGGER LIMITED Size A4 Sheet 2 of 2
and Voltage

34
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Isolated Interface circuit diagrams follow

35
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
+5V
+10V_ISO +3.3V_ISO
TP2 11 TX1 TP14
1 6 VR1 TP32
+10V_ISO 3 LM1117-3.3 2
2 5 TP3 IN OUT
C5 C9 GND C12
C4 C7
3 4 TP24 + 10.00uF 100.00n + 12 + 10.00uF
10.00uF 100.00n 1
16 25 12 12
TP1 ISOLATING Tx 50.00
12
R24
IC5 6N136 4.70K C14 C10
1
NC1
8 1 + 10.00uF 100.00n
0.063 16 25 GND
2 7
-10V_ISO
+5V 3 6
1 14 D1
2 SHDN VCC 13 4 5 LL4148
D1 D2 NC2 TP25
3 12 C1 11
uP_TxD1 4 T1ldr R2out 11 100.00n RS232_TX

10
11
5 T1in R2din 10 25
6 T2in R1din 9 TP38 9
7 T2ldr R1out 8 8
TP44 GND EN IC9
IC3 6N136 +3.3V_USB 7
GND
MAX250 R3 8 1 1 14 6
IC1 4.70K NC1 2 AC ISO GND 13 5
7 2 3 V+ V- 12 RS232_Tx 4
T1din T1out PL3
4 11 3
6 3 5 T2din T2out 10 RS232_Rx 2
TP46 R1ldr R1in
6 9 1
GND_EARTH 5 4 7 R2ldr R2in 8
NC2 BYP RTRI
+5V +3.3V_USB
RS232_RX MAX251 RS232
TP43

+
+5V IC2
5 1 C13 Plug
VCC B 2 C24 NF 10.00uF
A 4.70K

R39 1.00K
uP_RxD1

+
4 3 1.00uF 16

R12 220R
Y GND 25.00 +3.3V_USB GND
IC4 6N136
8 1
74AHCT1G08GW NC1 GND
R4

7 2

GND_EARTH 6 3 R18
TP40
1.00K C8
5 4 TR2 1.00n
NC2
BCW32 50.00
+5V USB_RX +3.3V_USB
TR3
R2 BCW32
+5V C2 1.00K
1.00n R11 R16 USB_Rx
50.00 680R IC6 6N136 4.70K R36 TP41
SK1 1 8 1.00K R19
1 TP39 NC1 1.00K
2 2 7 TP42 R17
3 100.00K
4 TR1 3 6 R37
R8 NOT FITTED

R10 NOT FITTED

Connection to

FOR MODEL 10
10.00K

R8 10.00K

R10 10.00K

5 BCW32 1.00K
FOR MODEL 20
TP47
instrument

6 4 5 TR6
NC2 BCW32
7 GND
8 USB_TX
R6

9 USB_Tx
IDbit0 TP34
10
11 IDbit1 C25 R38
12 IDbit2 R1 1.00n 100.00K
R7 NOT FITTED
FOR MODEL 20

13 100.00K 50.00
R9 NOT FITTED

<Variant Name>
FOR MODEL 10
R5 10.00K

R7 10.00K

R9 10.00K

14
NOT FITTED

MEGGER LIMITED Document Number

C3 Archcliffe Road, Dover,
TP36 3.30n Kent, CT17 9EN, England
6270-306
400 Title
INTERFACE BOARD (ISOLATED)
Instrument: MIT5XX & 10XX Issue Date CN No.
GND_EARTH GND_EARTH ISOLATION GND Drawn By : Simon Hay nes 3 11-10-06 22841
Date: Tuesday , June 22, 2004 2 03-02-2005 22235
© MEGGER LIMITED Size A4 Sheet 1 of 2

36
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
+3.3V_USB_uP +3.3V_USB +1.8V +3.3V_USB_uP
+5V_USB TP30
R29
PL2 TP13 R25
1 3.00R TP33
2 30.00R
C17
3 22.00pF
R22
4 50.00 10.00K
R30 22 R20 1.50K 1

25
0.063 C18 C19 C20

6
5

4
470.00nF 100.00n 1.00n
30.00R 1 0.063
C21 25 25 50

VCC
VCC

VDD1V8
22.00pF 5
50.00 6 PUR
TP23 DP0
GND 22 7
DM0 GND
TP37
USB Conne ctor C22 23 IC10
24 TEST0 TUSB3410 TP16 TP15 TP12
GND XL1 TEST1 23
22.00pF
50.00 12.00 26
X2 21 USB_Rx

MHz
DTR USB_Rx
20
C23 27 RTS 19
X1/CLKI SOUT/IR_SOUT 17 USB_Tx
SIN/IR_SIN USB_Tx
22.00pF 16 TP7
GND TP45 TP6 RI/CP 15
50.00 TP11
DCD 14
DSR TP10
13
11 CTS TP4 TP9
10 SCL
SDA
+3.3V_USB_uP TP29 32
31 P3_0 22 +3.3V_USB_uP
TP20 P3_1 CLKOUT TP18
30
TP17 P3_3
R23 R26 29 R21 10.00K
TP19 P3_4
15.00K 30.00K D2 1 12
VREGEN WAKEUP
LL4148 TP21
2 1 0.063
9 SUSP

GND
GND
GND
RESET
TP5

+ C6

8
18
28
1.00uF TP8 TP22
25.00

GND
TP48
+3.3V_ISO TR5 +3.3V_USB
BCF29

R35
10.00K TP28 Not Fitted (NF) List
1
R33
R32 100.00K
R31 1.00M R5, R7, R10, R39
10.00K R28
4.70K

TP27

+1.8V
TP26 TP31
C15
10.00uF <Variant Name>
16
R27 TR4 + MEGGER LIMITED Document Number
100.00K BCW32 R34 Archcliffe Road, Dover,
Kent, CT17 9EN, England
6270-306
100.00K C16
D3 100.00n Title
BAS16 50.00 INTERFACE BOARD (ISOLATED)
Instrument: MIT5XX & 10XX Issue Date CN No.
USB Pre se nt Drawn By : Simon Hay nes 3 11-10-06 22841
GND
and Voltage Date: Tuesday , June 22, 2004 2 03-02-2005 22235
© MEGGER LIMITED Size A4 Sheet 2 of 2

37
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Power supply circuit diagrams follow

38
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
SK4
12V 1

To Controller Board
2
TP19 3
4
5
Charger Off 6
BattMon 7
Charging 8
MainsOn 9
OFF OFF 10
+15V from mains 11
12V 12V 12
13
0V 14
R13 12V To Battery
1K C2 C7
HS2 100nF 100nF
protection
2%
0.125W 50 50 circuit
D19
C9 0V_Battery
+ 1m
1 2
25 TP6 TP7 MBRS2040LT3

7 8 D18
R12 R17 R18
100K 10K 3 TR3
R14 + MTP3055E
180R 1% 1% 6
IC2
5% 0.063W 0.063W 2 - MBRS2040LT3
C8 2.5W 1K
TLC271ACD 1% PL7
R20 4 1 5
100nF 1K 0.063W 1 Isolation
50 1% ISO_TX 2 transformer
0.063W
TP9 TP10
TP8 TR4
Run from mains if
BZX79C3V9 mains is there
R16 TP3
1K R24 R15
2% 2R 2R D10
D5 2N7002 0.125W 1% 1%
0.25W 0.25W R7

0V MAINS 0V mains 100K

MBRS2040LT3 R32 TP31
D6
Charger - 400mA LL4148
current source 1M
1% 0.063W C21
C15 + 10uF
R5 100n
35
7 8 25.00

1M 3
+
1% 0.063W 6
IC1
2 -
Components in this box needn't be fitted for production TL061CD
4 1 5
R4 0V 0V
Charge On LED
TP11TP12
Lit if mains present and 1M
charger is on 1% 0.063W
R3
12V R33

R30
TP13 10K 1M 100K
R26 1% 0.063W 1%
TP17 1% TP1
10K 0.063W
0.063W TP24
TR5 1%
0.063W Battery voltage
TP14 BCF29 TP18 TP20 divide by 4 TP22 TP23
R27
1K TR8
R55 R28 TP15
10K 1K 1% TR6
D20 BCF29
1% 1% 0.063W BCF29
0.063W 0.063WTP16

LL4148 R52
R29
TR7 47K R54 R31
10K 47K
1% 2.2K
2N7002 1% 1% TP21
0.063W 1% 0.063W
0.063W 0.063W
R53 <Core Design>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
2.2K Kent, CT17 9EN, England 6270-295
1% 0.063W
Title
0V mains POWER SUPPLY BOARD
Instrument: MIT5XX & 10XX Issue Date CN No.
Battery MainsOnDetect
Drawn By: C.Wedge 4 05-04-2005 22321
Date: Friday, April 12, 2002 5 05-05-05 22336
© MEGGER LIMITED Size A3 Sheet 1 of 4

39
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
12V

C10
470n D4
50 1N5355B

R34
C2 and R3 close to VR1 1.5K
1%
0.25W D3
R35 1N5355B
3.3R

1% 0.25W

C11 4.7nF D2
5
50 BYW29E-100
C5 C6 R21 VIN
100nF + 100u 100K VSW
4 ISO_TX
50 1% VR1
25
0.063W LT1070CT 2
FB
VC GND
HS1
1 3 R19
750R
TP25 TP32 2%
0.125W
L3 R22 TR2 1 2
OFF 2N7002

1K
1% R23
C4 330R
0.063W TP26 10nF 1%
50 0.063W

0V

<Core Design>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England 6270-295
Title
POWER SUPPLY BOARD
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: C.Wedge 4 05-04-2005 22321
Date: Friday, April 12, 2002 5 05-05-05 22336
© MEGGER LIMITED Size A4 Sheet 2 of 4

40
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
C30

100PF

TX1
C29 R2
2 100R
9 100p HS5
C13 C1
100pF 100pF 63 20%
TP29
500 D11 500 0.75W
C14 BZT03C68 1
6 7
R36 1 2
BR1 330nF 470R 11 12V
KBU6J 400
+

C17 5%
2W D13 C19 TX2 C16 C20
BZT03C82 4 + +
~

TP30 470u 1m
5 13 D17
25 25
MBR20200CT 100n
-

100nF 25
300 D14 COMMON
R37 0V MAINS
1M UF4006 3
1

0.5%
L1 0.5W 10 R39
19mH 300R
D15 R40
L1 L2 L2 1%
R38 MCT2 IC3 0.063W
6 1 TP28
1M NC2
2

0.5% C12 R41

1N4148 4.99R 5 2
C22 0.5W 1K
1% 100n 1% R49 R42
0.25W 25 4 3 0.063W C23 100K 100K
NC1
4.7nF 1% 1%
100nF 50 0.125W 0.125W
300

Short track
SK1 3 2 R43
R46
5.6R
X

R8 1%
C3 4.7K TOP245Y 0.25W 62K C25
R6
120K + 100U 1% 1 2% 100nF
C

FS1 HS6 IC4 C26 0.125W 50

A

5% 0.25W
T

400
0 R44 1W 4 3 2 1
D

SK2 40R 63
S

C27
100n + 47u nc A A C
IC5
R48
4 5 7
16 TL1431CD 10K
1 2 TP27
nc A A A 1%
0.063W
1
2 5 6 7 8
3 NEUTRAL

PL5

<Core Design>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England 6270-295
Title
POWER SUPPLY BOARD
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: L.Densham 4 05-04-2005 22321
Date: Friday, April 12, 2002 5 05-05-05 22336
© MEGGER LIMITED Size A4 Sheet 3 of 4

41
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
12V 12V

R56
10K
1%
0.063W

TP33 TP34 TP35

R57 R58
PL8 BCF29
Battery 1 TR9
+
Connector - 2 D21
TP36 47K 10K
MMSZ4692 TP38
2% 1%
0.125W 0.125W
R59
10K 0V_Battery 0V_Battery
1%
0.063W

5
6
7
8

5
6
7
8
TP37

TR10 TR11
Do not fit TR11
FET_gate 4 FET_gate 4
IRF7491 IRF7491

R60

1
2
3

1
2
3
10M
1%
0.063W

<Core Design>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England 6270-295
Title
POWER SUPPLY BOARD
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By: C.Wedge 4 05-04-2005 22321
Date: Friday, April 12, 2002 5 05-05-05 22336
© MEGGER LIMITED Size A Sheet 4 of 4

42
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Measurement circuit diagrams follow

43
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Analogue Digital

Marked 'Hi' on PCB

VoltageMeasurement +5V(A)
Connects to HV board
PL1
Front panel '+' terminal, via resistor +5V(A) TP84 TP85 TP86 TP87
0V(A)
HVin 0V(D) 0V(A)
-8V +12V +5V(D)
L1 470uH -8V 0V(D) PL5 TP207
PL4 D32
GuardFuseVolts /IrDA_disable 2 1
4 3 -8V
|Av gVolts| DebugComms3 6 5
Marked 'G' on PCB BreakdownDetect DebugComms4 TP122
SK1 1 RxD0 into CPU 8 7
Connects to front panel 'G' terminal Polarity DebugComms1 10 9
GuardFuseOK 2 TxD0 f rom CPU MBRS130LT3
0.5 DebugComms2 12 11 /Eng_mode
3 RxD2 into CPU
FS1 IRDALink2 14 13 UP_OK
ADC 4 TxD2 f rom CPU IRDALink1 16 15

A
Sheet 6 18 <-KEY-> 17 CNVS -12V
SK2 20 19
|Av gVolts| +8V +5V(D)

+5V(A) 1 RxD1 into CPU / Tx f rom IrDA

+8V 0V(D)
+5V(D) 2 TxD1 f rom CPU / Rx into IrDA
0V(A) 2.5V-REF +5V(A)
Current 0V(A)
0V(D)
-8V 0V(A)

AdcReset-

SPI[1..4]
DRDY-
/Discharge -8V 0V(D) IRDALink

+8V Sheet 5 /IrDA_disable +5V(IrDA)

+5V(A) CurrentMeasurement
+5V(IrDA)
+8V
+5V(A) 0V(IrDA)
0V(A) 2.5V-REF 0V(IrDA)
0V(D) Current 0V(D)
0V(A) -8V IRDALink[1..2] 0V(D)
0V(D)
-8V
PL3
CurrentOv rRng SPI[1..4] Sheet 4
IN

CurrentRange1
Marked 'Lo' on PCB CurrentRange2
Connects to front panel '-' terminal CurrentRange4
CurrentRange-FLT
TP95

Sheet 2

Controller

CurrentRange1 +5V(A)
CurrentRange2 +12V
BreakdownDetect CurrentRange4 TP181
Polarity CurrentRange-FLT TP93
GuardFuseOK AdcReset-
CurrentOv rRng DRDY -
ADC_SPI[1..4] Board_ID0 1
DebugComms[1..4] Board_ID1 2
DebugComms[1..4] 3
IRDALink[1..2] 4
PowerSupply +8V IRDALink[1..2] DACout 5
CNVS 6
+5V(IrDA) +5V(A) +5V(D) UP_OK 7
/Eng_mode /Discharge 8 To HV Board
+12V +8V Board_ID0 9
+5V(IrDA) +5V(D) Board_ID1 10
+12V +5V(A) DACout HV_OFF 11
+5V(D) +5V(D) /Discharge 12
0V(D) 0V(A) HV_OFF 13
0V(A) 0V(A) 0V(D) 5mA_Select 14
0V(IrDA) 5mA_Select
-8V 0V(D) SK10
-12V 0V(D)
-12V 0V(IrDA) 0V(A) -12V 0V(A)
Sheet 7 bom-SM Production
-8V TP89 TP90 TP94 TP91 TP92 TP96
Sheet 3 MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England
6270-298
Title
Measurement Board - Block Diagram
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By : C.Wedge 11 22-02-2006 22621
Date: Wednesday , August 14, 2002 12 06-03-2006 22636
© MEGGER LIMITED Size A3 Sheet 1 of 7

44
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
+8V 0V(A) Not fitted
+8V
+8V
R264 TR14 LM339
C12 0V(A) 100K 2N4393 4 2.5V REF
+5V(A) 100nF C102 C103 C104 C105 C106 C107 C108 C109 FILT_FET 2 -
1u 1u 1u 1u 1u 1u 1u 1u Y 5
+5V(A) 3 CurrentRange-FLT
IC1-1+
V+
0V(A) R265
IC1-5 100K LM339 TP149
0V(A) LM339 10
V- H_FET 13 -
Y 11
0V(D) 12 IC1-4+ CurrentRange1
TR6
R273 R5 R1
0V(D) 10K 1K 1K 2N4393
-8V C13
100nF LM339 TP148
8
-8V M_FET 14 -
-8V 0V(A) R3 Y 9
100K IC1-3+ CurrentRange2

R7 TR1 R24 TP2

10K 2N4393 +5V(A) 10K
C95
CurrentOv rRng
1u
Detects mains frequency
R274 R23 noise clipping
R9 1K 6.8K
100K R275 R276
33K 33K

R11 R120 TP11 9 IC2-3

100K 100K TP183 + 14
+8V 8 Y
TP182 R27 - LM339
TP10 10K

+8V R260
R13
C2 100R 100R
Guard Track (0V-Q) 100nF
R22
1K 0V(A)
0V(A) SK11 TP7 7 8 0V(A) R26 TP13
TP6 100K C9 R28
3 10nF 10K 11 IC2-4
+ +
6 TR4 13
2 BCW32 Y
IN - IC16 10
-
CA3140E C3
R16 R17 10nF 0V(A) LM339
1R 1K 4 1 5
C6 R261 R18 TP14
1u 1K 2.2K R277
22K R30
C4 10K LM339
D2 D3 100nF C5 6 2.5V REF
R21 1N5400 1N5400 100nF TR5 L_FET 1 -
10R BCF29 -8V Y 7
-8V 0V(A) TP185 TP186 TP187 IC1-2+ CurrentRange4
TP9 TP188
+8V C7 TP179
100nF TP184
PL120
0V(A) 11 R20
100R
IC3 R75 R76 R278 R279 R280 R281
V+
12 100K 100K 1.5M 100K 100K 100K
13 CLK OUT TP189 C114
14 CLK IN 10nF
4 INT/EXT- 9 0V(A) R262
5 - CLAMP 10 -8V 100R
R19 3 + OUT
100K 6 NC1 R288 10K
TLC2652CN
+5V(A) NC2 TR15
CXB CXA V- CRET C10 2N4393
0V(A) 100nF C115
1 2 7 8 +8V 100nF
R259
2.2K TP190
C54
-8V 0V(A) 1u R282 100K
R283 R284 7 8 0V(A)
TP191
C8 10K 10K
100n 3
+
6
IC22 Current
+8V 2 -
R10 2.5V REF 2.5V REF
2.2K C11 C55 ADOP07DN
R77
VR1 100n 100K 11 100nF
ZRC250 R285 4 1 5 C116
TP3 IC13 10K R286 100nF
Guard band (0VA) V+
12 10K
R78 13 CLK OUT
Nc Vr 2.5V-REF CLK IN
100K 14 0V(A)
Gnd 4 INT/EXT- 9 0V(A) -8V
R12 - CLAMP 10
2.2K 5 C117
3 + OUT 3.3nF R287
6 NC1 10K
TLC2652CN
C110 C111 C112 C113 C57 NC2
TP5 1u 1u 1u 1u 1u CXB CXA V- CRET C56 TP192
100nF
1 2 7 8
R14
10K
0V(A) 0V(A)
bom-SM Production
-8V 0V(A)
MEGGER LIMITED Document Number
C59 Archcliffe Road, Dover,
100n Kent, CT17 9EN, England
6270-298
Title
Measurement Board - Current Measurement
0V(A)
C58 Instrument: MIT5XX & 10XX Issue Date CN No.
100n Drawn By : C.Wedge 11 22-02-2006 22621
Date: Wednesday , August 14, 2002 12 06-03-2006 22636
Guard band (0VA) © MEGGER LIMITED Size A3 Sheet 2 of 7

45
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Shorted on
Power Plane
+5V(D)
C38 C39 C41 C40
100nF 10uF 10uF 100nF
+ 10 10 +

0V(D)
Shorted on
0V(A) Ground Plane

LKD3
+12V 1 2
+5V(IrDA)

+5V(A)
VR2 LKD6
R38 R258 7805 1 2
I O +5V(A)
2.2K 2.2K
C

VR3
TP97 C18 7808
I O +8V
100uF
10 C
+ C21 C22
C17 10uF 10uF C19
C20 + 100uF 16 16 100n
100n
16
D8 + + D29
BZX79C5V6 MBRS130LT3
D16
LST670-JL

0V(A)

0V(A) C100
1uF C101
25 100n
+ + + D33 LKD4
MBRS130LT3 1 2
0V(IrDA)
C97 C98 C99
100n 1uF 1uF
25 25

C
-12V I VR4O -8V
7908

<Variant Name>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England
6270-298
Title
Measurement Board - Power Supply
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By : C.Wedge 11 22-02-2006 22621
Date: Wednesday , August 14, 2002 12 06-03-2006 22636
© MEGGER LIMITED Size A4 Sheet 3 of 7

46
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

+5V(IrDA)

R329 100R

R330 100R

R331 100R
TP218
+5V(IrDA)

C147 + C145
10uF 100nF
10
R42 R43
TP98 10R 10R
C32
10pF
TP28
0V(IrDA)

R44
R45 R46
XL1 10K R41 R40 10R 10R
10K 10K
4.91 MHz

0V(IrDA) C33 TP102 IC7

10pF 1 MCP2120-I/SL 14
2 Vdd Vss 13 TP29
3 OSC1/CLKIN EN 12
4 OSC2 TX 11 TP99
5 RESET RX 10 TP100
6 RXIR BAUD0 9
7 TXIR BAUD1 8
/IrDA_disable MODE BAUD2

TP177 R253 TP31 TP30

C137
C146 TP103 0V(IrDA) 100R TFDU4100 C35 + 10uF
TP101 100nF 1 100nF
IRED A 10.00
2
0V(IrDA) 3 IRED C
4 Txd
5 Rxd IC8
6 NC
TP105 TP106 7 Vcc
TP104 8 SC
GND
+
C92 C93
IRDALink1

IRDALink2
10uF 100nF
10

3
2
1
IRDALink[1..2] IRDALink[1..2] 0V(IrDA)

Not Fitted
PL10
SC1
1 4
2 3 Screening can
for IrDA link

+5V(D)
+5V(IrDA) 0V(D)

bom-SM Production
0V(IrDA)
0V(IrDA)
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
0V(D) Kent, CT17 9EN, England
6270-298
Title
0V(D)
Measurement Board - IRDA Link
Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By : C.Wedge 11 22-02-2006 22621
Date: Wednesday , August 14, 2002 12 06-03-2006 22636
© MEGGER LIMITED Size A4 Sheet 4 of 7

47
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
+5V(D)
R316 +5V(A) C36 TP37
1K 10pF
TP211 TP217
C89
IC28-1 10nF
1 2 TP32 TP34 TP36
XL2 +5V(A) TP33 TP35
13 4.9152 MHz

MHz
R320 # IC9
IC27-2 TP212 4066 +5V(A) TP38 1 24 0V(D)
10K DVdd BUFEN
0V(D) C37 2 23
LM339 DGnd DRDY SPI2 DRDY -
6 R323 C142 10pF 3 22
- R326 Xin SCLK SPI4
1 10K +5V(A) 10K 1n 4 21 1. CS
7 Y 50.00 5 Xout Dout 20 SPI3
+ RESET Din 2. SCLK
6 19 SPI1
DSY NC CS 3. DIN
0V(A) D35 7 18
AdcReset- PDWN POL 4. DOUT
LL4148 IC27-1 TP216 8 17
DGnd AVdd SPI[1..4]
TP213 9 16
LM339 2.5V-REF Vref + AGnd
+5V(A) R324 4 10 15
100K - 2 6 # Current+ 11 Vref - Aincom 14
5 Y 12 Ain0/D0 Ain3/D3 13 C135 0V(D) R47 0V(D)
+ 4066 Ain1/D1 Ain2/D2
8 9 R289 1K 0V(A) 10nF 10K
R319 0V(A) ADS1240
IC28-3 TP193 |Av gVolts|
10K -8V TP214 Current-
D36 TP194 0V(D)
LL4148 IC28-2 R49 1K
3 4

5 C127 C90
TP215 #
R321 IC27-3 4066 100nF 100nF
1K
9 +5V(A)
+ 14
TP210 8 Y
LM339 0V(A)
- R325
0V(A) 10K

Current

TP208
C125
Guard ring connected to pin 4 (negative input) +8V 100nF
D34
L2 11
PL119 C136
CapVolts IC23 100n BZX79C3V9
V+
12 0V(A)
13 CLK OUT
CapVolts R314 14 CLK IN
1K 4 INT/EXT- 9 0V(A) R315 1K IC24-4
5 - CLAMP 10 11 10 SK6
3 + OUT
6 NC1 TP176 12
TLC2652CN #
NC2 4066
CXB CXA V- CRET R308 10M
+5V(A) +8V
1 2 7 8 R293
0V(A) 10K R307 C43 +8V
1K 100nF
R290 R302
TP202 R313
1K -8V 10K 10K
C126 TP196 R305 0V(A) TP203 C91
7 8
C124 10nF 1K 100nF
C122 C123 100nF 3
+
C119 C120 C121 100n 100n R294 IC12 6
1u 1u 1u 10K 2 - NF

8
63 63 63 Guard band (0VA) 0V(A) R303 R304 ADOP07DN

13

1
100R 100R IC24-3

#
4 1 5 IC24-1

#
4066
C46 4066
100nF
TR16 R295

9
2N4393 10K 0V(A)

2
-8V
NF -8V 0V(A)

+8V
0V(A)
+8V +5V(A)
/Discharge

+5V(A) +5V(D)
R296
10K +5V(D)

TP197 0V(D)

0V(A)
+8V +8V
TR17 +8V -8V 0V(D)
BCF29 0V(A)
IC28-4
11 10 C128 C139 C138 -8V
14

14
0V(A) 100nF 100nF 100nF
TP198
12 3
VCC

VCC
#
4066
V+
D28 0V(A) -8V 4066 4066
LL4148 0V(A) 0V(A) IC27-5
GND

GND

IC27-4 LM339 0V(A)

R297 V-
<Variant Name>
10K 11 C129 C140
7

+ 12
Y
13 IC24-2 100nF IC24-5 100nF IC28-5 C141 MEGGER LIMITED Document Number
10 3 4 100nF Archcliffe Road, Dover,
-
Kent, CT17 9EN, England
6270-298
LM339
R298 5 Title
#
100K 4066 -8V -8V -8V Measurement Board - ADC
-8V 0V(A) -8V Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By : C.Wedge 11 22-02-2006 22621
-8V Date: Wednesday , August 14, 2002 12 06-03-2006 22636
© MEGGER LIMITED Size A3 Sheet 5 of 7

48
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
+5V(A)
+5V(A)
By: Compiled: +5V(A)
AC Rectif ier C132
100nF

C45
100nF R52 ADOP07DN 0V(A) TP46 TP47
7 8
3 10K
3
+
V+ 6
IC26 |Av gVolts|
0V(A) +5V(A) 2 -
IC2-5 C130 R53 R54
0V(A) LM339 100nF D9 2.2K 2.2K
V- 0V(A) LL4148 4 1 5
C133
12 7 8 0V(A) 100nF If a.c. then firmware to multiply by
C118 form factor of 1.111 for rms value.
100nF 3
+
TP49 6 -8V 0V(A)
IC25
R55 2 - C48 C49
TP55 R66 10K ADOP07DN + 10uF + 10uF
22K
4 1 5 16 16
-8V
C131 D10
-8V 100nF LL4148
C51
3.3nF 0V(A)
-8V

0V(D) +5V(A) C44

100nF R57 R58 R59
0V(D) 10K 10K 10K
TP52
0V(A)
7 8
0V(A)
R63 3 NOT FITTED & VARIANT LIST
+
100K 6
IC11
2 -
HVin
ADOP07DN

C134 4 1 5
10nF +5V(A) TP178
C47
100nF
BreakdownDetect
0V(A)
-8V R61
10K Detects "pops" during breakdown.
R60 Output current is limited to 2mA
R309 100K R269 R270 or 5mA elsewhere.
100R TP58 33K 33K
4mA=33nF
LM339
6
0V(A) - 1
C50 7 Y
100n TP56 +IC2-2

+5V(A) R311 TP204

1K R69
10K
R310 R62
100K R68 1M
1K
D30
BZX84C3V0 CW
TP57
TP205

0V(A) RV1 0V(A)

10K
D31
BZX84C3V0 ZERO ADJ

TP62 If regularly toggleing

-8V R312 R268 then assume a.c.
2.2K +5V(A) 10K
TP206 Not fitted Polarity

R271 R272
TP64 33K 33K
+5V(A) +5V(A) R73
C14 10K LM339
100nF 4
- 2
R32 5 Y
100K TP19 0V(A) +IC2-1
TP199
7 8

50mV 3
+
6
IC4 GuardFuseOK
2 - R267
GuardFuseVolts
10M
R35 MCP601
10M TP20 R266 TP61
4 1 5 10K
0V(A)

C15 R33 0V(A) MEGGER LIMITED Document Number

Archcliffe Road, Dover,
100nF R37 1M
Kent, CT17 9EN, England
6270-298
100K R36
Title
1K
Measurement Board - Voltage Meas. & Guard Fuse Monitor
Guard Fuse Monitor Instrument: MIT5XX & 10XX Issue Date CN No.
Drawn By : C.Wedge 11 22-02-2006 22621
<Variant Name>
Date: Wednesday , August 14, 2002 12 06-03-2006 22636
0V(A)
© MEGGER LIMITED Size A3 Sheet 6 of 7

49
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
+5V(D) +5V(D) PL11 PL13 PL15
PL12 PL14 PL16

10K

10K

10K

10K

10K

10K

10K

10K
R89
Debug[0..5]

R226

R227

R228

R229

R230

R231

R232

R233
10R 0V(D)
R79 1K
TP129 TP130 C86 C87 C88 C60 R81 R80 Debug0
100n 100n 100n 100n 10K 10K D11 LST670-JL
A-VCC +5V(D) Debug1 R82 1K

P20

P21

P22

P23

P24

P25

P26

P27
C65
16

16

8
14 C64 100nF Debug2 D12 LST670-JL
4538 10uF + R83 1K
VCC

VCC

Vcc
14 Debug3
RC Vcc R85 R86
15 10 ¦ 1 5 10R 10R D13 LST670-JL
12 C Q 4538 4538 2 A0 SDA Debug4 R84 1K

10K

10K

10K

10K

10K

10K

10K
11 A 74HC32 3 A1 24C64
+
GND

GND
13 B 9 7 A2 6 TP108 0V(D) Debug5 D14 LST670-JL
RES Q GND WP SCL

R234

R235

R236

R237

R238

R239

R240
A2D REF

Vss
IC19-3 IC21-5 IC20-3 0V(A) SW2
8

8
IC20-2 7 +
TP109
IC14

4
C61 C62 C63 R88 10K

P30

P31

P32

P33

P34

P35

P36
TP131 100nF 1uF 100nF +5V(D)

TP73 R87 10K SW1

0V(D)
+5V(D) TP71 0V(D)
+5V(D) +5V(D) 0V(D)

10K

10K

10K

10K

10K

10K

10K
Not fitted - engineering use only
R99 0V(D)
Engineering use only

R241

R242

R243

R244

R245

R246

R247
100K TP72 +5V(D)
TP111
C143 R300 10K
R100 R102 R101
R327 R328 100K 100K 100K C144 10nF IC15
100K 100K 10nF 16 D20
N/F N/F N/F TP110 62 Vcc LL4148 R256

P44

P51

P52

P53

P54

P56

P14
99 Vcc uP_HV_OFF TP147 22K
TP74 98 AVcc +5V(D)
96 Vref TP174 TP175
14 AVss
Vss P20 CNVS HV_OFF
64 72 TP150 R255
Vss P20/A0(/D0/-) 71 P21 TP151 D21 22K
P21/A1(/D1/D0) 70 P22 TP152 R248 R249 LL4148 TP173
0V(A) 0V(D)SDA 38 P22/A2(/D2/D1) 69 P23 TP153 1M 1M R257
SCL 37 P60/CTS0/RTS0 P23/A3(/D3/D2) 68 P24 TP154 D22 R254 22K TR13
R104 DebugComms1 36 P61/CLK0 P24/A4(/D4/D3) 67 P25 TP155 LL4148 100K TR12 BCW32
0V(D) 10K DebugComms2 35 P62/RxD0 P25/A5(/D5/D4) 66 P26 TP156 BCW32
IRDALink[1..2] R91 FLASH - CLK1 34 P63/TxD0 P26/A6(/D6/D5) 65 P27 TP157
0V(D) 10K 33 P64/CTS1/RTS1/CTS0/CLKS1 P27/A7(/D7/D6) 63 P30 TP158
IRDALink1 32 P65/CLK1 P30/A8(/-/D7) 61 P31 TP159 C79 0V(D)
DebugComms[1..4] IRDALink2 31 P66/RxD1 P31/A9 60 P32 TP160 100nF +5V(D)
DebugComms4 30 P67/TxD1 P32/A10 59 P33 TP161
DebugComms3 29 P70/TxD2/SDA/TA0out P33/A11 58 P34 TP162
28 P71/RxD2/SCL/TA0in/TB5in P34/A12 57 P35 TP163 0V(D) +5V(D)
1. CS 27 P72/CLK2/TA1out/V P35/A13 56 P36 TP164 TP132 R121
R109 10K ADC_SPI1 26 P73/CTS2/RTS2/TA1in/V P36/A14 55 TP133 1M
2. SCLK P74/TA2out/W P37/A15 CurrentRange4 IC19-1
TP114 ADC_SPI2 25 54 TP112 2 D17
3. DIN Board_ID0 P75/TA2in/W P40/A16 CurrentRange1 RC
+5V(D) ADC_SPI3 24 53 1 6 LL4148
VARIANT "0" 4. DOUT R111 10K ADC_SPI4 23 P76/TA3out P41/A17 52 GuardFuseOK 4 C Q
P77/TA3in P42/A18 CurrentRange2 A
TP115 22 51 5 +
Board_ID1 P80/TA4out/U P43/A19 Debug0 UP_OK B
21 88 3 7 C81
20 P81/TA4in/U P00/D0 87 Debug1 R110 RES Q C80 100nF
R105 R106 R107 R108 R322 R301 ADC_SPI[1..4] P82/INT0 P01/D1
10K 10K 10K 10K 10K 10K 19 86 Debug2 100K 4538 TP134 100nF
DRDY - P83/INT1 P02/D2
18 85 Debug3
N/F N/F N/F N/F R90 10K TP136 NMI- 17 P84/INT2 P03/D3 84 Debug4 +5V(D)
+5V(D) 11 P85/NMI P04/D4 83 Debug5 0V(D) TP135
10 P86/Xcout P05/D5 82 WDTKicking Debug[0..5]
R112 R113 R114 R115 P87/Xcin P06/D6 uP_HV_OFF
10K 10K 10K 10K Polarity 7 81 IC20-1 10 ¦
6 P90/TB0in/CLK3 P07/D7 80 /Discharge TP113 0V(D) R116 2
BreakdownDetect P91/TB1in/Sin3 P10/D8 /Discharge RC IC21-3 8
BreakdownDetect See note!5 79 33K 1 6 9
TP209 TP180 P92/TB2in/Sout3 P11/D9 CurrentRange-FLT C Q 74HC32
DACout 4 78 D7 4
TP116 P93/DA0/TB3in P12/D10 AdcReset- A
CurrentOv rRng 3 77 LL4148 5 +
P94/DA1/TB4in P13/D11 P14 5mA_Select B
2 76 +5V(D) 3 7 13 ¦
TP117 TP200 1 P95/ANEX0/CLK4 P14/D12 75 TP165 R299 0R RES Q
TP118 P96/ANEX1/Sout4 P15/D13/INT3 IC21-4 11
0V(D) 100 74 BreakdownDetect 4538 12
v ariant bit 0 (LSB) P97/ADtrg/Sin4 P16/D14/INT4 74HC32
97 73
v ariant bit 1 P100/AN0 P17/D15/INT5 P44 TP137
95 50 R48 C82 0V(D)
v ariant bit 2 94 P101/AN1 P44/CS0 49 TP80 1M D25 TP120 100nF
v ariant bit 3 (MSB) 93 P102/AN2 P45/CS1 48 TP166 TP201 R93 +5V(D) LL4148
issue bit 0 (LSB) 92 P103/AN3 P46/CS2 47 10K 0V(D) TP138
3
issue bit 1 91 P104/AN4/KI0 P47/CS3 46
issue bit 2 90 P105/AN5/KI1 P50/WRL/WR 45 P51 TP167
issue bit 3 (MSB) 89 P106/AN6/KI2 P51/WRH/BHE 44 P52 TP168 TP172 TP139 IC21-1
TP119 P107/AN7/KI3 P52/RD

¦
15 43 P53 TP169
Xin P53/BCLK 74HC32
13 39 C83 C84
RES 12 Xout P57/RDY /CLKout 40 P56 TP170 100nF 100nF
C69 BY TE 8 RESET P56/ALE 42 P54 TP171 R122 10K TP140 1 2
PCB ISSUE "0" TP79 33p +5V(D) 9 BY TE P54/HLDA 41 TP82 0V(D) 4
CNVss P55/HOLD IC19-2 ¦
14 IC21-2 6
+5V(D) 15 RC 10 5
TP81 6139-201 /Eng_mode
12 C Q 74HC32
0V(D) R94 +5V(D) 11 A
+
Note: Do not use pin 5. 0V(D) 10K 13 B 9 TP142 TP141
RES Q
MHz 6

XL4 D15 R95

LL4148 100K R96 4538 CNVS
10K D18 TP121 0V(D)
0V(D) 0V(D) D19 LL4148
SK12 P01102BL
SK13
D23 LL4148
+5V(D) R117 1K
C85 R225 TP143
+5V(D) C68 470nF 0R
33p 0V(D) R118 TP144
C70
0V(D) TP83 100nF 100K D24 LL4148
TP78 R97 R119 1K
CNVS RESET 680R bom-SM Production TP145 TP146
0V(A)
0V(D) PL118 +5V(D)
0V(D) 0V(D) Not f itted 1 MEGGER LIMITED Document Number
1
2
3

2 CNVss Archcliffe Road, Dover,

0V(A)
CNVS
3 PL117 Kent, CT17 9EN, England
6270-298
Not f itted Title
0V(D) Measurement - Controller
Instrument: MIT5XX & 10XX Issue Date CN No.
R224 0R Drawn By : C.Wedge 11 22-02-2006 22621
Date: Wednesday , August 14, 2002 12 06-03-2006 22636
© MEGGER LIMITED Size A3 Sheet 7 of 7

50
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
5KV Generator circuits follow

51
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
R2 SK11 SK12
750K R1 Wire HV PL2
TP80 NET3 1 1
TP55 TP87

BZX79C7V5
C5 5% 0.5W 100M R110
CL D45 +8V +8V +12V VR1 +8V
+5V 7808
100nF 8 C1 100K
R85 I O 47n
REF C R129
V+ C3 1,500 R111 10K R112
0V C20 + + C4 D36 5% 1%
10R TP75 R90 3.9K IC1-3 R8 R9 C2 100nF 10K
2W 2W
TR10 CA3240E 12K 4.7K 100n 220u 220u BZX79C10 100K C39 R10
C22 C21 V- 1% 1% C6 47nF 100M
R96
R17 10K 0.125W 0.063W 47n 6,000
10nF 100n 2N7002 R91 4.7K 4 1,500
10K 1% TP5 R130 R131
TP10 +8V 0V-PWR 0V R13
1% 0.125W 10K 10K
TP76 0.125W
0V 6V max +12V 5% 5% 6.8M
TX3 C8 2W 2W 2%
curr_lim_sw 3 8 D31 47n 0.25W
0V + 1 BY 203-20S 1,500
IC1-1 R92 250T
2 BCF29 10K 7 0V C40
PL12 - TR1
C11 9 D21 N/F
R21 R113
470nF 100K 470K CA3240E BY 203-20S C9
TP56 250T
6 47n 10n
1% 1% R148
0.063W 0.063W C10 50 R18 TR11 10 D22 1,500 R11 8.2K 1,000
D50 R34 10K R35 10K TP57 33nF R28 R29 14 BY 203-20S
4.7K 250T 8.2K 5%
1% 2N7002 +12V 5 5W
R30 R31 C13 12T 11 D23 C12
0.063W TP77 PL3
BZT03C18 1% 0.125W 1% 0.125W 100K 120K 1 250T BY 203-20S 47n
R32 1% 2% 4 1,500 3 2 1
R149 2.2K D9 LL4148 47n 0.063W 0.125W curr_lim_sw 12 D24

SHORT TRACK
5K
5 1M 1M 50 BY 203-20S
N/F + 1% 1%
250T R114
7 R33 R93 R94 3 C14 - 33M
R151 2.2K 6 0.063W 0.063WTP14
TP58 - IC1-2 R38
15K 3.9K 6.8K 13 D25 47n 0 5%
D11 LL4148 2.2K 2% BY 203-20S 1,500 + 0.5W
CA3240E DISABLE 0.125W TP82 250T
2 RL1
C41 1%
N/F 0.063W TR12 +12V
BCW32 R115 4 5 Tvolts to meas
VC R41 2mA(L)_5mA(H)
47K 0V
R156
-12V

100n TP25 +5V

Input 0v

1% 1K R15 R150
+8V 0.063W 1% 8.2K 8.2K
C42 DAC OUT BCW32 10K
0.063W R95 5%
TP52 TR2 1%
R44 10K 5W
0V 0.063W 0.063W
+

47K
470u 7 8 1% CL Current
D51
1% NF NF 3 2 1
0.063W R118 R119
C7 3 10K 10K
limit
+
UF4006 1n 6 1% 1%
IC5 TP59
50.00 2 - 0V 0.063W 0.063W 0V - R117
TP51 0 33M
CA3140M TR3 0V + 5%
C35 BCW32 RL2
4 1 5 0.5W
SK13 100n R76
R120 R121 4 5
A2

25 1K 1K
FS2 1% 1%
2.2K 1% PL10 0.063W 0.063W +12V
R77 R20
SK14 10K TP53
0.063W PL9/3 PL9/1 C24 + C23 D15 8.2K R152
1% 100nF D52 8.2K
TP54 0V 50 47u 1N4002 BZX84C10
PL13 0.063W 5%
+12V SK10 +5V
0 0 5kV 2mA(L)_5mA(H) 1
5W

0 1 10kV +12V 2
TP93
3 0V 3 2 1
PL4 1 0 15kV HV_OFF 4
HV_OFF PL7
0V 5
R123 R122
SK8 SK9 BY W29E-100 +12V 6 10K D48 - 33M
discharge- 7 TP86 LL4148
FS1 1% 0 5%
+5V +5V 8 0.063W + 0.5W

1
2
3
2

D43 TX2 0V 0V_Cap 9 TR13 RL3

A2 + C36 + C34 DAC OUT10
+ C32 C33 D44 -12v 11 BCW32 TR14 4 5
220u 220u R116
470u 100n BZT03C18 1M 12 BCW32
25 25 HV_OFF
3

PL5
25 25 1% 13
Input 0V R27 R153
1 2 0.063W 14 8.2K 8.2K
LKD1 5%
5W
0V 0-V +8V 0-V
R125
TP79 1.5K
1%
TP60 0.063W 3 2 1
C25
R58 R59 TP61 10nF +5V D53
R57 R124

BZT03C68
33K 4.7K 15K TP62 R62 BZX84C10 - 33M
TP38

1N4002
TP63 8 5 6 1K C26 0
TP40 5%

D18
R60 R61 0V 10n R87 + 0.5W
R6 TP98

D49
2 TR5 1K RL4
R65 + 10K
3 R63 22K R64 C27 IRF530
22K 22K TP48 LM311 7 4 5
PL8
V+ 3 - IC4 D16
LM339

100R 100nF 3
100R

HLMP1340
IC6-5 5 IC6-1 11 IC6-4 2 LL4148 0V
+ + 4 1

D47
2 9 IC6-3 13 1
V- 4 Y + 14 10 Y
- 8 Y - DISABLE R56
12 LM339 TP65 - LM339 DischargeMeasure
TP66 1.5K
LM339 R67 R7
TP67 R70
R66 47K 10K
R154 R51
TR4 8.2K 8.2K
10K TP46 R68 BCW32 5% 5%
15K 7 IC6-2 10R 5W 5W
+ 1 TR6 0V
TP64 6 Y BCW32 D19 D20 Not Fitted TP31 0-V 0V
- R73
R69 R71 R72 15K
C28 C29 LM339 C30 C31 <Core Design>
4.7K 47K
10K 2.2n 2.2n
TP68
100pF 1N4002 1N4002 MEGGER LIMITED Document Number
50 470p discharge- Archcliffe Road, Dover, 6270-300
Kent, CT17 9EN, England
Title

R88 0R
5kV HV BOARD
0V-PWR Instrument: MIT5XX Issue Date CN No.
0V Drawn By : L.Densham 9 15-02-06 22608
Date: Monday , December 31, 2001 10 11-07-06 22737
© MEGGER LIMITED Size A3 Sheet 1 of 2

52
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Keep the guard creepage distance min either side of measurement track
guard track 50 thou min
Capacitance Measurement Circuit

PL11
R78 R155 R128 R82 R127 R126 CapVolts
82K 47K 47K 12K 4.7M 4.7M
5% 1% 1% 1% 1% 1%
5W 0.25W 0.25W 0.25W 0.6W 0.6W

DischargeMeasure

connect guard to '0v_Cap'

R157
75K
1%
0.25W

R83
0V_Cap
10K
1%
0V 0.063W

COMPONENTS NOT FITTED

C40
D9
D11
PL8
R6
R7
R118
R119

<Core Design>
MEGGER LIMITED Document Number
Archcliffe Road, Dover,
Kent, CT17 9EN, England
6270-300
Title
5kV HV BOARD
Instrument: MIT5XX Issue Date CN No.
Drawn By : L.Densham 9 15-02-06 22365
Date: Monday , December 31, 2001 10 11-07-06 22309
© MEGGER LIMITED Size A4 Sheet 2 of 2

53
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
10 KV Generator circuits follow

54
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
R8 750K R13 100M R131 39K R132 39K R133 39K R134 39K SK9 SK7 SK11 PL7
TP39 1 1 Wire 1
C31 100nF
TP20 D1 5% 0.5W 1% 2W 5% 2W 5% 2W 5% 2W 5% 2W HV
REF CL +8V
R16 R17

Wire
+8V SK10 10K 10K
BZX79C7V5 8 +12V VR1 +8V 5% 5% R12

1
R68 10R R71 3.9K 7808 2W 2W 100M

1
+5V V+ 1%
I O SK17
0V C10 2W
R117 R116 C R19 R18
1% 0.063W TP16 1% 0.063W IC1-3 12K 4.7K C8 + 220u D19 C14 8.2K 8.2K
TR6
R72 4.7K CA3240E 1% 1% 100n + C11 16
47n Wire 5% 5%
C29 C30 V- 0.125W 0.063W 25 C9 100n 1,500 5W 5W
R46 R43
10nF 100n 10K 10K 220u 25 BZX79C10 SK13
2N7002 4
50 25 1% 0.063W 1% 1% TP34 16 TX2 C15

1
0.125W 0.125W 13 47n
R10
TP12
0V 6V max BY 203-20S D8 1,500
R127 R21 R20 6.8M C3
+8V 0V-PWR +12V 0V 12 10K 8.2K 8.2K 2% 10n
curr_lim_sw TP18
3 14 C16 5% 5% 5% 0.25W 1,000
0V + 1 47n
IC1-1 BY 203-20S D9 2W 5W 5W
C26 2 - TR10 TR3 11 1,500
PL9 BCF29 R75
470nF 2N7002 10K 15
R66 R67
25 100K 47K CA3240E C38 1% BY 203-20S D10 C17
33nF TP27 10 47n
1% 1% R62 0.063W R128 R23 R22
D26 0.063W 0.063W 50 4.7K 16 1,500 10K 8.2K 8.2K
R49 10K R44 10K TP14 R80 100K R114120K curr_lim_sw
1% BY 203-20S D11 5% R129 5% 5%
0.063W 9 C18 2W 10K 5W 5W PL3
TP3
BZT03C18 R64 1M R63 1M C28 +12V 17 47n 5%
-12V

1% 0.125W 1% 0.125W 470nF 1% 0.063W 2% 0.125W BY 203-20S D12 1,500 2W

R11 25 TR5 1 8
R124 2.2K LL4148 5K 1% 0.063W 1% 0.063W BCW32 18 C19

SHORT TRACK
D22 N/F R48 R25 R24 Tvolts to meas
5 6.8K BY 203-20S D13 47n 8.2K 8.2K
+ R115 R47 TP41
7 7 1,500
Input 0V

TP15 15K 3.9K 1% R36 5% 5%

6 - IC1-2 2% 1% 0.063W 24 19 10K 5W 5W
TP4 R65
R125 2.2K 2.2K 0.125W 0.063W 0V BY 203-20S D14 C20 5%
D23 N/F DISABLE R39
CA3240E 1% R126 1K 6 47n 2W 10K
0.063W 20 1,500 5%
LL4148 R100 BY 203-20S D15 2W R27 R26
C39 100n VC 47K 0V 1% 0.063W 5 C21 8.2K 8.2K
TP11 R73
1% 10K 21 47n 5% 5%
0.063W +5V Current 1% BY 203-20S D16 1,500 5W 5W
TR7 CL 0.063W 4
BCW32 limit R37
C40 470u 22 C22 10K
DAC OUT TP10 R98 R74
+8V 47K 10K BY 203-20S D17 47n 5% R40
TR2 3 1,500
+

1% R97 R95 1% 2W 10K R29 R28

D25 BCW32
0.063W 10K 10K 0.063W0V 23 5% 8.2K 8.2K
UF4006 1% 1% BY 203-20S D18 C23 2W 5% 5%
7 8 0.063W 0.063W 0V 2 47n 5W 5W
C41 0V 1,500
1n 3
+
50 6 C24
IC2 TP8 R38

2mA(L)_5mA(H)
2 - 47n 10K R31 R30
SK19 1,500 5% 8.2K 8.2K
TP22 CA3140M R96 R94 R41
A2

1K 1K 2W 10K 5% 5%
FS2 1% 1% 5% 5W 5W
4 1 5 R76 2.2K PL9/3 PL9/1 0.063W 0.063W C13 D21
C12 2W
SK20 +12V SK16 + 47u 100n
SK15
1 25
16
1% 0.063W 2 1
C32
R111 0 0 5kV 0V 3
R33 R32
10K TP9 1N4002 8.2K 8.2K
100n 1% TP19
0 1 10kV OFF 4 +5V C25 5% 5%
PL10 25 0.063W 5 0V 15nF 5W 5W
1 0 15kV 6 0
Discharge- 7 PL4 SK14 Sub-Board
0V +5V 8 1
SK2 SK4 D2 0V 9
+12V 0V_Cap DAC OUT 10 Wire R35 R34
FS1 1 8.2K 8.2K

1
2
3
-12V R69
+5V 11 10K 0V_SubBrd 5% 5%
2

BY W29E-100 TX1 D3 12 1% SK8 5W 5W

C6 C5
PL1 A 2 C1 + 220u + 220u 13 0.063W OFF
C4
+ 470u 100n
25 25 R101
14 +12V 0V
25 BZT03C18 1M
3

25
PL2 PL6 1% TR8
Input 0V 0 0V 0.063W BCW32

1
TP2 C42 R50
10uF + C43 1K
+8V 100n 2%
35
25 D27 0.125W SK6 SK12
TP35 BZX84C10 RL1
TP24
C36 +5V D20
R55 R118 D6
4.7K 15K 10nF 0V HV
R59 TP23 R120 D7
33K 1% 2% 1K 50 C7
TP17 8 5 6 10n D24 HLMP1340
1% 0.063W 0.125W 1% TP30 R77
TP6 R82 22K R81 22K BZT03C82 100
0.063W 0.063W 10K
2 + 0V C37 1N4002 1%
R57 22K R58 100R R60 100R 100nF TR1 TP47
3 0.063W LL4148
1% 0.063W 1% 0.063W TP29 LM311 7 IRF530 PL5 0
V+ 3 - IC4 50 3 R51 1.5K
LM339

1% 0.063W 1%0.063W 1%0.063W 2 Discharge- TR4 SK5 SK18 On Sub-Board

IC3-5 5 IC3-1 11 IC3-4 1 BCW32
+ 2 9 IC3-3 + 13 4 1 1% 0.063W
V- 4 Y + 14 10 Y DISABLE

1
TP7 - Y - R112
8 10K TP5

2
12 LM339 - LM339
TP13 R89 1%
LM339 R84 10K LKD1 DischargeMeasure
TP28 47K 0.063W
R54 15K TP46 1% 1
TP25 R61 R4 R1
0.063W 10R 8.2K 8.2K

1
1% 0.063W 1% 5% 5%
2% 0.125W 7 IC3-2 TR9 0.063W 0V 5W 5W
+ 1 BCW32 Not Fitted
R56 Y
10K C27 6 0V
- R88 D4 D5 0V_SubBrd
1% 2.2n 15K
R119 LM339 R86
0.063W 50 4.7K C34 C33 C35 47K 2% <Core Design>
1% 2.2n 470p 100pF 1% 0.125W MEGGER LIMITED Document Number
0.063W 50 50 TP26 50 0.063W 1N4002 1N4002 Archcliffe Road, Dover, 6270-301
R85 0R Kent, CT17 9EN, England
Title

1% 0W
10kV HV BOARD
0V 0V-PWR Instrument: MIT1020&30 Issue Date CN No.
Drawn By : L.Densham 6 11-07-06 22737
Date: Monday , December 31, 2001 5 21-09-05 22438
© MEGGER LIMITED Size A3 Sheet 1 of 2

55
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Circuitry to be mounted on the sub-board

Circuit is guarded by pads on the measurement board Capacitance Measurement Circuit

L2 L3
<TY PE> <TY PE> PL8
CapVolts

L1
<TY PE>

R2 R3 R5 R9 R6 R7
1 DischargeMeasure 82K 47K 47K 12K 4.7M 4.7M
1% 1% 1% 1% 1% 1%
0.25W 0.25W 0.25W 0.25W 0.6W 0.6W

R130
33K
1%
0.25W

0V_SubBrd

COMPONENTS NOT FITTED

C3
D22
D23
PL5
R77
R94
R97
R112

MEGGER LIMITED Document Number

Archcliffe Road, Dover,
Kent, CT17 9EN, England
6270-301
Title
10kV HV BOARD
Instrument: MIT1020&30 Issue Date CN No.
Drawn By : L.Densham 6 11-07-06 22737
Date: Monday , December 31, 2001 5 21-09-05 22438
© MEGGER LIMITED Size A4 Sheet 2 of 2

56
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
Section 6 Component Layouts Page

6.1 Display Board 58

6.2 Keypad Board 59

6.3 Interface 10 & 20 Board 60

6.4 Isolated Interface Board 61

6.5 Power Supply Board 62

6.6 Measurement Board 63

6.7 5KV Generator Board 64

6.8 10KV Generator Board 65

57
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Display PCB 5240-430-A9 Drawing Issue 6

IC1
MTHOLE_1 MTHOLE_2 MTHOLE_3
R2
SK30 H1
FIDMARK1

R266

R264

R262

R260

R258

R256

R254

R252

R250

R248

R246

R244

R242

R240

R238

R236

R234

R232

R230

R228

R225

R222

R219

R216

R214

R212

R209

R207

R205

R203

R201

R199
R1

C83 C81 C82

PL2 FIDMARK2

R292
BOARD

MARK
D41

FID
ZERO

R3 D1
FM1
PL3 R4
SK15 SK14
R5 R6
SK13 SK12
R7 R8
SK11 SK10
R9
FM2

C80

R301 R302 R303

L2 R10 D2 R11 R12 R13 R14 R15 R16

TR37
TR38 C1
PL4 D10

R17
R304
R288 R293
TR1 IC2 IC3 TR2 TR3 IC4 TR4 TR5 IC5 TR6 C2 C3
R18 D3

R284
R283
LKD1
C75

LKD2
C76 C77 R19 R20 R21 R22 R23 R24
TR39
PL5 L1

C4
R286 R287
C79
IC26 R25 D11 TR7 TR8 TR9 TR10 TR11 TR12 TR13
C5 C6 C7 C8

R33
R289
PL6

R32
R26 R27 R28 R31
R35
R290
C78 R29 R30

SW1
C10 C11

LKD3
R34
R291 R295 R297 R294 C9

R36
R37 R38
C84
R296
TR30
R39
PL7 R40 C14 C15 R41
C12
IC27
R134 C13 R42
C68

LKD4
LKD5
R43

R46
SW2 R44 R195 R194
C17
R193 C18

LKD6
R285
TR35 R48
C19

R49
PL8 D14 IC23 TR14 R47 R50

R51
R52
R53

R54
R55
R181

R59
C20
R56
R57
R58
SK9

R309
R182
C66
D36
SK1
C21
R185
D17

R64
R65
R62
R63

R66
R60

R69
D18 C22 R61
D22 TR15 TR16
TR17

TR18

R67 R68 SK22

D20 D21
R71
XL1

R72
R70 D19 R73 R74 R75 R76

C85
R78 R84 C24
C30 C23 R85 C25 R86
TR19

TR20

C29
R77

R81

R83
R79
R80

R82
R87 R89 D23

C86
SK2

C27
R88
R92

R93
R94
D24 TR23 TR24
TR21

TR22

R90 R91
C26

IC7

R307
R95
R97 C28 IC8 IC9 R98 R108
TR25

TR26

R103
R96

C33
R104
R105
R106
R306
R99 R100 R101 R102 TR27
R112
C31
C34
R109 R110 R111 R113
R298

R45
PL9

R114
SK8

R115
R107
C35
R299 R120 R122 R123
R119 TR28 C32 TR29
R121 C38 R124
R281
R282

R300 C36 R125

IC10 C37

R128

R132

R133
R127

R129
R130

R131

R116
R117
R118
R126
C40 D27
R200

C39 R135 R136

R137
IC12
C41
R141 D42 TR36 C42 C43 C44 C45 C46
R158
R155
R140
R145 C47 R146
R143

R144

R142 R280 C71

R147 C69 R279 C70 R138 C48 D28 C49 D29
C74

R139
C72 C73 C52 D30 C54 D31
R148

R149

C50

IC14 IC15 IC16

C51

IC13 IC17 C53 R150 C55 R151

IC25 IC24 C56

SC1 R154

D32
IC19 IC21
R305

R156
R157

R308 IC20 C57

SK28 SK21 SK3
R278

R277

R276

R275

R202

R204

R206

R208

R210

R213

R215

R217

R220

R223

R226

R229

R231

R233

R235

R237

R239

R241

R243

R245

R247

R249

R251

R253

R255

R257

R259

R261

R263

R265

R267

R268

R269

R270

R271

R272

R273

R274
R160
R161
C88

C87

SK20
IC18 SK4
C59 C60
R162 D33 D35
SK26 SK19

R164 C89 D34

TR33
R171
SK25 SK18 C62 C63
R183 R169
MTHOLE_4 MTHOLE_5 R184
D39 D38 D37
SK24
C67
PL14

XL2 R163

PL12
R186
SK23 SK16 C61
R174
R175
R176
R177
R178
R179

D40 LKD8

R152
TR32
SK6 LKD9
LKD10 R159
PL11

IC22
C65

SK7 C58

SK29
LKD11 TR31
LKD7
R187
R188
R189
R190
R191
R192

R153

SK5
SK31
H2 MTHOLE_6 MTHOLE_7
BAR_CODE_LABEL_SM BAR_CODE_LABEL_CON PL13

58
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Keyboard PCB 5240-432-A5 Drawing Issue 1 Note: Is a 2 board plaque. Upper centre part (engineering board) is snapped off from keyboard.

PLUG PLUG
MTHOLE_4 MTHOLE_5 MTHOLE_17 PL11 PL10 MTHOLE_18 MTHOLE_11 MTHOLE_10

SWK1 SWK2 R53

SWK3 SWK4
H1

R68
R52
6 6 TR3

PL15

R51
IC9 TR1

R66
R39

R64
1 1 D10

R56
R59

BRKT2
SW3

BRKT1
R13

C13 R62

C12
SWK6

R41
SWK5 PL12 PL13 SWK7

R19
PL9

C10
C9

R27
C11
C8

R58
R38
R60

R61
R37
R63
R36
SWK8 PL6

R40
C26
IC2

C14

C16

C28

C29

R14
R57
R55
C23

C24

C25
R9
IC4 R21

C15
R5

R42 R23

SWK9 SWK72 SWK10

XL1 R24
D1

R48
R70
IC6 IC3 IC8 SW1

C20
C19 R35
D6

C27
R22

R2
R1

R8
R65

R11
BAR_CODE_LABEL_SM

SK1

C18
R67 R26
R33
R29
R10
R47 R28
D5 R54
R46

SWK11 R3 R4 R7 R6
R32
R25
R43
IC1

TR4
R49
C7
D9

C6
R16 R34
D7

BAR_CODE_LABEL_CON
R44 R30

C22
SWK12 PL14
C21
IC7 R69
SWK13

TR5
R50
R12 D8

C4

C5
R15 R18
R17

PL3 PL1 PL5 PL8 R45

C1
1 1
C2

C3 6 6
SK2
MTHOLE_3 SWK14 SWK15 SWK16 SWK17 MTHOLE_12

MTHOLE_16 PLUG PLUG MTHOLE_19

PL2 PL4

BRKT3 BRKT4

WD2 D2 SWK18 SWK19 SWK20 SWK21

D3
MTHOLE_6 MTHOLE_7

SWK22 SWK23 SWK24 SWK25 SWK26 SWK27 SWK28 SWK29 SWK30 SWK31 SWK32 SWK33 SWK34 SWK35 SWK36
MTHOLE_0

SWK37 SWK38 SWK39 SWK40 SWK41 SWK42 SWK43 SWK44 SWK46 SWK47 SWK48 SWK49 SWK50
MTHOLE_2 SWK45 MTHOLE_8 SW2 MTHOLE_9

SWK51 SWK52 SWK53 SWK54 SWK55 SWK56 SWK57 SWK58 SWK59 SWK60 SWK61 SWK62 SWK63 SWK64 SWK65

FIDMARK1 SWK66 SWK67 SWK68 SWK69 SWK70 SWK71

FIDMARK2
MTHOLE_1 MTHOLE_15 MTHOLE_14 MTHOLE_13
BOARD

MARK
FID
ZERO

H2 FM1 FM2

59
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

510 comms PCB 5140-988-A2 Drawing Issue 2

FIDMARK1
FIDMARK2
BOARD

MARK
ZERO

FID
C29
C26

C27

C32
C30

C31

C28
FM1 FM2
SK1 H2
IC1

R10

R9
R8

R7

R5
R6 R39
R4

R1

R2

C2
R40
IC2 IC11

R11
TR1

R37
C6

R13
R36
C25 R38
R15
TR3

TR6
TR2

TR7
IC7

R21
R20
R17 R18

R41
C8
R19
IC10 IC8

R23
R22
R25 D2

R26
C9 C11

VR1 C15 C16 C21

R27 R28 R29 C18

C17

C19

C20
C12 C13 XL1 R30
TR5
TR4

R31

R34
R32
R33

D3
R35 C22 C23

R42 1
6 PL2
SK2
H1

60
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

520 Isolated Comms PCB 5140-987-A3 Drawing Issue 1

IC1

C1
SK1 R5

R1
C3

R2

C2
R7
R8

R11
R9 TR1
R10

R6
IC3
R3

R4
C24

IC2
IC4 IC5 IC6 TX1
R39 R16

R17
R12 R37

R36
C25 R38 C6

C17
C4 C5

TR3

TR6
TR2
R29
D1
C7
C10

R20
C9 R18
C8
R19
IC10 C18 C21

IC9

R22
R25 R23 R21
R24

D2 R26

VR1 C15 C16 C20

R27 R28 R30
C12 C13 C14 XL1 C19
TR5
TR4

R31

R34
R32

R33
D3
R35 C22 C23

PL2
PL3

61
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
PSU PCB 5240-431-A9 Drawing Issue 3

FIDMARK1
FIDMARK2

BOARD

MARK
FID
ZERO
FM1 FM2
BREAK1 BREAK2 BREAK3

HS6

HS1
R19
MTH1 H2

SK1
C12 R23 C10
IC4 TR2 TP26 VR1
D4 PL8

R35
TP33 PL7
TP36
TP37
TP38

L1

R22
R21
C4

C22 C26 TP32

R60

R38
R8

TR9
FS1

R56

R59
C5
L3 D19

R34
TP34 R57 TR10 TR11 D18
C11

C23
R43
C25
C8
IC3 TP28 R58
TP27 C6 D2
TP35

PL5 R46 D21

SK2

R48
IC5

R41
C27

R37

R39
R49
C13 C30 D3 C16 C9
R42

C20
C1 C19 R14
C17 TP29 C15 R26

R44
TP18

TP16 TP13
TR6 TR5
C21 TP20

R36 TP15 R54 TP14

R29
D5 D10

R27
TP24
R13

BR1 D14
TP12 R31
R30
TP17

TP6
R40
R12
TP31 TR7
R6 D20 TR8 R17

TP7
TP21
TP1
IC1 R18
TR3

TP11

TP3
R16

TP8
R55
R20
R28

R53
R52

R5
R3

R7

R32
TP30 R4
TR4

TP10
C14 R2 TX2 R33

R15
R24
TP19 TP22 TP23 IC2
L2 C3 C29D17 SK4
D11

D13
TP9
TP25 C7

D15 C2
HS2
H1 HS5 MTH2
TX1

D6

BREAK6 BREAK5 BREAK4

62
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Measurement PCB 5240-428-A12 Drawing Issue 5

C11 C110 C58

PL120
MTH1 MTH3 H2

SK1
C49 C48
C8 C59 C55

R54
C111
PL3 C132
C6 R21 C7 R53
R59

C112
IC3 IC13 L1 R35
C102 D2 C4 FS1
R58

IC26
C113 C54 C133
D3
C103 SK11
R52
R16
R78 R75 R76 R57
PL1
C10
C57 C56 R279 R278
R55 C130

PL4
IC25

SK2
C115
C104 R3 R9 C5 R77 C114
R280 R281 R282 D9
C2 R288 C131 D10
TR6 TR1 R19
R13
TR15 R66
R283
C105 R1
R5
R7 R17 R260 TR4 R284
C51

R273 IC16 R287

IC22 R296
C122

R297
R261 R18 R286 TR17 R32 C14
R11 R120
C3 C117
C123 R63 C44

C134
C106 IC4 IC11

TR5
C121 D28

R298
R269 R309
R270 R275
R20 R262 C116 C138

R310
C95 C12 C13 C45 C118 R37 R33

R320
R321
R271
D34

R316
R276

R319
C139
R272 R24

D36
C47
C15 R36

R323
C107 R268 R69
C120 TR16 RV1

R325
R265 R274 R68
R324 C125 R302 C43
R23 R28
IC27
R267

R73 R277 IC28 IC23 C128

R290
TR14 IC1 R266
IC2 R30

R293
D35
R304
C108 R60 R27
C119 R314 R313 R303
IC12

C126
R62 R26

R294
R326
L2 R305 D30 D31
R61 C50 C9 C140
IC24

PL1
R307
R264

R22 C141

R295
R259
R10

R315

R311

R312
R285

19
C109 R289

C91
VR1

R49
C127 R308
C129 SK6
C124 C136
C90 C46
R14
R12

C135

C142
XL2
R257 R256 PL11
R299
R47
IC9 C40
BAR_CODE_LABEL_CON
C37

SC1
R232
R233
R231
R234
R230
R235
R229
R236
R228
R237
R227
R238
R226
R239
R247
R240
R87

TR13 TR12 C36

C41 C137
SW1 SW2 R255 PL12 C89 R86 R85 D29
R88

R253
R254 R241

PL13
R242 C35
C144
R243
R42
R84 D14 R244 R43 VR3 LKD4 D33
PL14
R245 PL10 C97
R246 R46
R83 D13 C99

BAR_CODE_LABEL_SM
C101

PL15
R93
R45
IC8 C19
C98 C100
R82 D12 IC14
VR4
PL16
R94 C21 C22
C62

R40
R322
C63
R105

R106

R108

R107
R301

R79 R331

C145
C147
D11
IC15 R41
R330
R80
R81
C60

R329
R112

R113

R115

R114

C61
R101
R104

R91

C33
R225
PL117

R38
R122

C39
XL1 IC7 R258
D16 C38 C18

D8
C32
C92
C65

R89

R300
C64
C143

R100
R99

D20 C69 R44

R111
R109
R102

LKD6
SK10

C146 C93
R248 R327
SK12
R328
LKD3
R121
D19

R118

R116
R119
R110
R249

R96

R97
R90

D22 C79 D21 D18 C85 C82 D7 D17 D32

XL4 C17 VR2

C20
D15
IC21
C86

C87

IC19 D24 IC20

FIDMARK1 PL118
C88 C70 PL5
FIDMARK2
R95
BOARD

R117

MARK
C80 C81
ZERO

D25

FID
R224
R48

C83 C84
SK13

H1 D23 C68 MTH2 MTH4

FM1 FM2

63
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

5KV HV PCB 5240-430-A10 Drawing Issue 6

FIDMARK1
FIDMARK2
BOARD

MARK
FID
ZERO

MTH2 FM1
R13
MTH4 BAR_CODE_LABEL_CON MTH5 BAR_CODE_LABEL_SM FM2

PL3 R10 H2
SK11 SK12
PL2
C40

R130 R131 R112

PL4 SK8 SK9

FS1
PL5

MTH3 MTH6

R129
D51 C33 C32 D45
D43 R11
D50
R148

R110
R111
R149

R114
R151
C36 C34 C39 RL1

C42
TX2 R2 R1
C41

C1
D44
PL13

SK14 SK13
FS2
C6
PL12 TX3 D31
R88
LKD1 TR5 R150 R15
D21

R117
C25
C8
C31 R62
D22
IC4 RL2
R61

C28 R66 R67

C27
R63
R69
R64

R57

R9
TR1
R60

IC6 D23
R28

R65
R58
R29
D24 C9
C29 R59 R8 C30 R33
R71

D25
D49

R72 R70
TR6

TR13

R73
D18

R68
C12
R41

R123

C26
R18
D19 D20
R31 C13 R32
R30
R21 C10 C24 R152 R20
R113 R44
C14
D15

TR2
IC1 C23
R38

D36

C2

R122
C20
R119 R121
R35 D11 D9 C11
C3
RL3
R118 R120 R34
R76 R77
R17
R116

TR3

R96
IC5 C7 R27
R91 C4 VR1 R78
R155
R93
R94
R156

R90
C35
PL10
TR10

C5
SK10

C21
R157 R153
TR11

TR12

R85
R115
1

R51
R95

R83
C22
R92

R125
R127
R128
R82

PL7
TR14
D52

D48
MTH12 MTH9
R56 R154
PL11
TR4

R6 R7
R124
D53

D16 R126
PL8 R87 D47 MTH11 MTH10 MTH8

H1
RL4

64
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

10 KV HV PCB 5240-429-A9

FIDMARK1
FIDMARK2

BREAK6
BOARD C3 R16

MARK
FID
ZERO
MTH1 FM1 BAR_CODE_LABEL_CON MTH5
BAR_CODE_LABEL_SM MTH7 FM2

PL3 PL7 H2
R12 SK7 SK11

MB R10 SK9 SK17

HV+
PL1 R133 R134 BREAK4 BREAK5

A FS1
SK4
SK2 R17
R8
C39 C40 R18
R127

2
R13
C14
D25
R125
R124

MTH2 MTH9 R19 R128

D26

PL2
R13
C15 R20 R129
B C1 C4 D2 MTH4

BREAK1
R21

R131
C16 MTH12
SK19

R22 R36
TX2
TX1

D8
FS2

R39
C17 R23
D9
SK20

D10 R37
PL10

R24
D3 D11 C18
R40
R25
C6 D12
R38
PL9

D13
C19 R26
C5 D14 R41
D1 R27
D15
C20
C36

C35 R120 D16

R28
R84 IC4 C37
R81

C27 R54 R116

D17
R57
R56
R58

R59

TR1
TR10
R82

IC3
R80 C21 R29
R60
D18
R114
R55
L3
C34 R118 R117 C33 R115
R119
R30

L2
PL8
R86 R89 R3
C22
TR9

TR8

L1
R88
R69
R100

R11
R85

R63 R62 R31 R2

R64 C28 D4 D5 VR1 R5
R66
C38 C9 C10
R67 C11 SK18
D19

R7
IC1
C23 R32 C25
R94
R96

R61
R101
R95
R97

R65

C7
D6 D7
C8 RL1 R33
R9
R6
TR7
R98

LKD1
R49 C24 R4 R1
R76 R111
SK16

R44 D22 D23 C26

IC2 R34
1

C41

R130
TR2

R46
R47

C32
R43
PL5
R126
R48

R112 R77
R74 R71 MTH3 MTH10
PL4 R72 R35
TR5
R73

C30
TR3

TR6

C31

PL6 SK12
R75

D20
D27

TR4
C29

MTH13
R68

D24 SK5 SK6 C43

SK8
WIRE-HOLE-RELAY MTH6 MTH8 MTH11
C12

R50
C42
D21

BREAK3
R51

H1
C13

65
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Section 7. BOM’s. Page

7.1 Display Board 67

7.2 Key Board and Engineering Board. 69

7.3 Communication Interface & Isolated Interface 70-71

7.4 Power Board. 72-73

7.5 Measurement Board. 74-75

7.6 5 KV High Voltage Board. 76-77

7.7 10 KV High Voltage Board. 78-79

66
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.1 Display Board BOM – circuit diagram 6270-299 issue12
Display Board Bill of Materials

Value Part Reference PARTNUM

0 BL1 6280-355
470u C1 C9 C75 C83 27890-012
100nF C2 C3 C10 C11 C14 C15 C24 C25 C27 C30 C37 C40 C48 C49 C51 C52 C53 32000-004
C54 C55 C76 C77 C81 C82
10nF C4 C5 C6 C7 C8 C12 C18 C33 C36 C42 C43 C44 C45 C46 C58 C61 C79 C80 32000-025
C85 C86
10uF C13 32000-023
100n C17 C20 C26 C31 C32 C38 C41 C47 C56 C59 C60 C65 C66 C69 C70 C71 32000-029
C84 C88 C89
470nF C19 C28 C57 C67 32000-063
100u C21 26970-070
33p C22 C23 32000-003
1uF C29 C72 C73 C74 C78 32000-044
2.2uF C34 C68 32000-013
1n C35 32000-027
10uF C39 C50 C87 32000-038
10pF C62 C63 32000-032
LST670-JL D1 D2 D3 D11 D17 31000-017
HLMP1340 D4 28920-085
HLMP-1440 D5 D6 D7 D8 D9 28920-093
MBRS130LT3 D10 D41 31000-021
HLMP-1540 D12 D13 D15 D16 D25 D26 28920-099
LL4148 D14 D18 D19 D20 D21 D22 D23 D24 D27 D28 D29 D30 D31 D32 D33 D34 31000-002
D36D37 D38 D40
BZX84C3V0 D35 31400-003
P01102BL D39 31900-001
TFDU4100 D42 31350-005
74AHCT1G08 IC1 30000-172
74HC259 IC2 IC3 IC4 IC5 IC13 IC14 IC15 IC16 IC17 30000-101
M30624 IC7 6139-200
4093 IC8 30000-191
4013 IC9 30000-022
24C256 IC10 31000-036
LM339 IC12 31000-028
MCP2120-I/SL IC18 30000-190
4538 IC19 IC21 30000-006
74HC32 IC20 30000-051
MCP602 IC22 IC24 IC25 30200-049
62 IC23 30000-052
TL5001ACD IC26 IC27 30200-037
0 L1 L2 27900-059
0 LC1 6480-076

0 PL2 PL3 PL4 PL5 PL6 PL7 25960-118

0 PL8 PL9 PL12 25960-045-03
0 PL11 25960-001-03
PLUG20EDGE PL13
0 PL14 25960-066-14
100K R1 R2 R37 R38 R51 R69 R72 R78 R79 R107 R108 R115 R116 R117 R118 33000-042
R121R127 R130 R134 R135 R137 R152 R155 R158 R171 R174 R175 R176
R177R183 R187 R188 R189 R190 R286 R287
1K R3 R10 R18 R19 R20 R21 R22 R23 R24 R25 R35 R42 R43 R44 R56 R57 R58 33000-031
R59 R68 R77 R91 R97 R98 R99 R123 R160 R161 R162 R169 R181 R283
R284 R288 R289 R290 R291 R307
330R R4 R5 R6 R7 R8 R9 R11 R12 R13 R14 R15 R16 R67 R70 R87 R88 R90 R95 33000-030
R122 R141 R142 R147 R192
10M R17 R292 33000-005
10K R26 R27 R28 R29 R30 R31 R33 R34 R39 R45 R47 R48 R49 R50 R52 R53 R54 33000-037
R55 R61 R62 R63 R64 R65 R66 R71 R73 R80 R82 R83 R84 R89 R92 R100

67
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: Compiled S.Mynott
MIT5XX/10XX Date 08/08/06 CN Number 22933
By: Compiled:
R104 R105 R106 R113 R119 R120 R124 R125 R126 R128 R129 R131 R132
R133 R136 R138 R139 R156 R157 R164 R178 R179 R182 R185 R191 R193
R194 R195 R275 R276 R277 R278 R279 R280 R281 R282 R293 R294 R295
R296 R297 R304 R305 R306 R309
33R R32 R36 R93 R94 R101 R102 R308 33000-028
10R R40 R41 R96 R114 R143 R144 R148 R149 33000-021
0R R46 R81 R186 R285 33000-105
33K R60 R75 R76 R85 R86 R109 R110 R111 R112 33000-039
1M R74 R140 R145 R150 R151 R154 R159 R163 33000-044
1R R103 R298 R299 R300 R301 R302 R303 33000-014
47K R146 R199 R200 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 33000-040
R212 R213 R214 R215 R216 R217 R219 R220 R222 R223 R225 R226 R228
R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241
R242 R243 R244 R245 R246 R247 R248 R249 R250 R251 R252 R253 R254
R255 R256 R257 R258 R259 R260 R261 R262 R263 R264 R265 R266 R267
R268 R269 R270 R271 R272 R273 R274
100R R153 33000-029
680R R184 33000-135
SCREEN 4PIN SC1 5131-396

0 SK2 35965-009

0 SK29 SK30 35965-002

0 SW1 SW2 35975-001

BCF29 TR1 TR2 TR3 TR4 TR5 TR6 TR16 TR17 TR19 TR21 TR25 31000-004
BCW32 TR7 TR8 TR9 TR10 TR11 TR12 TR15 TR18 TR20 TR22 TR24 TR26 TR27 31000-001
TR28 TR29 TR33 TR35 TR36
NDS352AP TR13 TR14 TR38 TR39 31100-010
2N7002 TR23 TR30 TR31 TR32 TR37 31000-016
0 XL1 35000-015
0 XL2 35000-012

68
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.2 Keyboard and Engineering Board BOM – circuit diagram 6270-297 issue 1
Keyboard Bill of Materials
Value Part Reference PARTNUM
470.00nF C1 C8 32000-042
100.00n C2 C4 C5 C6 C7 C9 C11 C12 C13 C14 C20 C22 C27 C29 32000-029
1.00n C3 C10 32000-027
10.00pF C15 C18 32000-032
10.00uF C16 32000-023
10.00uF C19 C21 C28 32000-022
100.00pF C23 C24 C25 C26 32000-030
SM1210SR/HG D1 31350-006
LL4148 D2 D10 31000-002
SM1206SRC D3 31350-004
LST670-JL D5 D6 D7 D8 D9 31000-017
LTC1383CS IC1 IC2 30000-088
MCP2120-I/SL IC3 30000-190
TFDU4100 IC4 IC5 31350-005
4538 IC6 30000-006
74HC244 IC7 IC8 30000-019
74AHCT1G126 IC9 30000-171
0 PL1 PL3 PL5 PL8 PL14 PL15 25960-045-03
0 PL2 PL4 PL10 PL11 25960-096
PLUG20EDGE PL6
0 PL9 25960-121
0 PL12 25960-065
0 PL13 25960-066-14
10.00K R1 R2 R5 R9 R49 R50 R53 R54 33000-037
10.00R R3 R4 R6 R7 33000-021
100.00R R8 R13 R14 R17 R18 R19 R48 R62 33000-029
2.00K R10 33000-106
1.00K R11 R12 R15 R16 33000-031
0R R21 R22 R23 R25 R26 R27 R28 R30 R32 R34 R42 R46 R47 R52 R55 R56 33000-105
R57 R59 R63 R64 R68
300.00R R24 R29 R33 R35 R65 R67 R70 33000-068
47.00R R36 R37 R38 R39 R40 R58 R60 R61 R66 R69 33000-096
47.00K R41 33000-024
22.00R R43 R44 R45 33000-049
4.70K R51 33000-035
0 SK1 35965-009
SOCKET-D25R SK2
0 SW1 SW2 35975-001
0 SW3 25975-107
SW KEYPAD SWK1 SWK2 SWK3 SWK4 SWK5 SWK6 SWK7 SWK8 SWK9 SWK10
SWK11 SWK12 SWK13 SWK14 SWK15 SWK16 SWK17 SWK18
SWK19 SWK20 SWK21 SWK22 SWK23 SWK24 SWK25 SWK26
SWK27 SWK28 SWK29 SWK30 SWK31 SWK32 SWK33 SWK34
SWK35 SWK36 SWK37 SWK38 SWK39 SWK40 SWK41 SWK42
SWK43 SWK44 SWK45 SWK46 SWK47 SWK48 SWK49 SWK50
SWK51 SWK52 SWK53 SWK54 SWK55 SWK56 SWK57 SWK58
SWK59 SWK60 SWK61 SWK62 SWK63 SWK64 SWK65 SWK66
SWK67 SWK68 SWK69 SWK70 SWK71 SWK72 NP

BCW32 TR1 31000-001

2N7002 TR3 TR4 TR5 31000-016
0 WD2 27920-011

69
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.3 Interface 10 & 20 BOM – circuit diagram 6270-296 issue 2
Value Part Reference PARTNUM
1.00n C2 C8 C20 C25 32000-027
1.00uF C6 32000-044
100.00n C9 C19 C26 C27 C28 C30 C31 C32 32000-029
100.00n C11 C16 32000-018
10.00uF C12 32000-038
10.00uF C13 C15 32000-023
22.00pF C17 C21 C22 C23 32000-043
470.00nF C18 C29 32000-042
LL4148 D2 31000-002
BAS16 D3 31300-003
LTC1383CS IC1 30000-088
74AHCT1G08GW IC2 30000-172
24C64 IC7 30000-102
24C64 IC8 TMP-287
TUSB3410 IC10 30000-188
74AHCT1G126GW IC11 30000-171
0 PL2 25965-178
100.00K R1 R17 R27 R33 R34 R38 33000-042
1.00K R2 R13 R18 R19 R36 R37 R41 33000-031
4.70K R4 R11 R28 R39 33000-035
10.00K R5 R6 R7 R8 R9 R10 R15 R21 R22 R31 R35 R40 33000-037
1.50K R20 33000-032
15.00K R23 33000-112
3.00R R25 33000-011
30.00K R26 33000-070
30.00R R29 R30 33000-015
1.00M R32 33000-044
6.80M R42 26836-731
0 SK1 35965-002
0 SK2 25965-186

BCW32 TR1 TR2 TR3 TR4 TR6 TR7 31000-001

BCF29 TR5 31000-004
LM1117-3.3 VR1 30200-004
0 XL1 28900-089

70
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.4 Isolated Board BOM – circuit diagram 6270-306 issue 2.
Value Part Reference PARTNUM
100.00n C1 C9 C10 C19 32000-029
1.00n C2 C8 C20 C25 32000-027
3.30n C3 26970-131
10.00uF C4 C12 32000-038
10.00uF C5 C13 C14 C15 32000-023
1.00uF C6 C24 32000-044
100.00n C7 C16 32000-018
22.00pF C17 C21 C22 C23 32000-043
470.00nF C18 32000-042
LL4148 D1 D2 31000-002
BAS16 D3 31300-003
MAX250 IC1 30100-006
74AHCT1G08GW IC2 30000-172
6N136 IC3 IC4 IC5 IC6 29350-003
MAX251 IC9 30100-005
TUSB3410 IC10 30000-188
0 PL2 25965-178
0 PL3 25960-127
100.00K R1 R17 R27 R33 R34 R38 33000-042
1.00K R2 R18 R19 R36 R37 (R39 not fitted) 33000-031
4.70K R3 R4 R16 R24 R28 33000-035
10.00K R5 R6 R7 R8 R9 R10 R21 R22 R31 R35 33000-037
1.50K R20 33000-032
15.00K R23 33000-112
3.00R R25 33000-011
30.00K R26 33000-070
30.00R R29 R30 33000-015
1.00M R32 33000-044
220R R12 33000-103
680R R11 33000-135
0 SK1 35965-002

BCW32 TR1 TR2 TR3 TR4 TR6 31000-001

BCF29 TR5 31000-004
0 TX1 35200-002
LM1117-3.3 VR1 30200-004
0 XL1 28900-089

71
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.5 Power Board BOM – circuit diagram 6270-295 issue 5
PSU Board Bill of Materials
Value Part Reference PARTNUM
KBU6J BR1 28920-038
100pF C1 C13 26970-165
100nF C2 C5 C7 C8 C25 32000-004
100U C3 26970-162
10nF C4 32000-025
100u C6 27889-976
1m C9 C16 27890-041
470n C10 27889-868
4.7nF C11 C23 32000-039
100n C12 C20 27889-836
330nF C14 26970-171
100n C15 32000-029
100nF C17 C22 26970-159
470u C19 26970-080
10uF C21 32000-022
100n C26 27889-827
47u C27 26970-175
BYW29E-100 D2 28920-073
1N5355B D3 D4 28920-065
BZX79C3V9 D5 28863-353
LL4148 D6 D20 31000-002
MBRS2040LT3 D10 D18 D19 31300-012
BZT03C68 D11 28920-044
BZT03C82 D13 29500-003
UF4006 D14 29400-013
1N4148 D15 28433-801
MBR20200CT D17 29400-020
MMSZ4692 D21 31400-007
0 FS1 25413-280
0 HS1 HS2 HS5 28863-365
0 HS6 27960-056
TL061CD IC1 30000-010
TLC271ACD IC2 30000-003
MCT2 IC3 28900-044
TOP245Y IC4 20100-004
TL1431CD IC5 31200-009
0 L1 27900-054
0 L2 6132-053
INDUCTOR L3 35200-026
0 PL5 25960-120-03
0 PL7 25960-120-02
0 PL8 25960-043
100R R2 26836-089
100K R3 R7 R12 R21 33000-042
1M R4 R5 R32 R33 33000-044
120K R6 26837-121
4.7K R8 26900-136
1K R13 R16 33000-010
180R R14 26837-101
2R R15 R24 26900-272
10K R17 R26 R30 R48 R54 R55 R56 R59 33000-037
1K R18 R20 R22 R27 R28 R41 33000-031
750R R19 33000-023
330R R23 33000-030
47K R29 R31 33000-040
1.5K R34 26900-053
3.3R R35 26900-286
470R R36 26837-211
1M R37 R38 26837-169
300R R39 33000-068

72
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
4.99R R40 26900-263
100K R42 R49 33000-003
62K R43 33000-016
40R R44 29250-002
5.6R R46 26900-183
2.2K R52 R53 33000-033
47K R57 33000-024
10K R58 33000-012
10M R60 33000-114
300.00R SK1 SK2 25418-213
0 SK4 35965-002

2N7002 TR2 TR4 TR7 31000-016

MTP3055E TR3 28940-037
BCF29 TR5 TR6 TR8 TR9 31000-004
IRF7491 TR10 TR11 31100-011
0 TX1 6231-714
0 TX2 6132-052
LT1070CT VR1 28900-105

73
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.6 Measurement Board BOM – circuit diagram 6270-298 issue 12
Measurement Board Bill of Materials
Value Part Reference PARTNUM
100nF C2 C4 C5 C7 C10 C12 C13 C14 C15 C35 C38 C40 C43 C44 C45 C46 C47 C55 32000-004
C56 C61 C63 C65 C70 C79 C80 C81 C82 C83 C84 C85 C90 C91 C93 C115
C125 C127 C128 C129 C130 C131 C132 C116 C118 C124 C133 C138 C139
C140 C141 C145 C146
10nF C3 C9 C89 C114 C126 C134 C135 C143 C144 32000-025
1u C6 C54 C57 C95 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 27889-996
C112 C113 C119 C120 C121
100n C8 C11 C58 C59 C122 C123 27889-827
100uF C17 32000-037
100uF C18 32000-021
100n C19 C20 C50 C60 C86 C87 C88 C97 C101 C136 32000-029
10uF C21 C22 C48 C49 C64 32000-023
10pF C32 C33 C36 C37 32000-032
10uF C39 C41 C92 C137 C147 32000-038
3.3nF C51 C117 32000-026
1uF C62 C98 C99 C100 32000-044
33p C68 C69 32000-003
1n C142 32000-027
1N5400 D2 D3 28863-095
LL4148 D7 D9 D10 D15 D17 D18 D20 D21 D22 D23 D24 D25 D28 D35 D36 31000-002
BZX79C5V6 D8 28474-273
LST670-JL D11 D12 D13 D14 D16 31000-017
P01102BL D19 31900-001
MBRS130LT3 D29 D32 D33 31000-021
BZX84C3V0 D30 D31 31400-003
BZX79C3V9 D34 28863-353
0 FS1 25950-034
LM339 IC1 IC2 IC27 31000-005
TLC2652CN IC3 IC13 IC23 20000-147
MCP601 IC4 30200-048
MCP2120-I/SL IC7 30000-190
TFDU4100 IC8 31350-005
ADS1240 IC9 30100-015
ADOP07DN IC11 IC12 IC22 IC25 IC26 28900-041
24C64 IC14 30000-102
M30620F CPFP IC15 6139-201
CA3140E IC16 20000-140
4538 IC19 IC20 30000-006
74HC32 IC21 30000-051
4066 IC24 IC28 30000-033
0 L1 27920-043
INDUCTOR L2 35200-026
LINK DUMMY LKD3
LINK DUMMY LKD4
LINK DUMMY LKD6
0 PL1 PL3 PL4 PL120 25930-055
PLUG20EDGE PL5
0 PL10 PL117 PL118 25960-045-03
0 PL11 PL12 PL13 PL14 PL15 PL16 25960-118
PLUG01/2P PL119 25257-668

74
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: Compiled S.Mynott
MIT5XX/10XX Date 08/08/06 CN Number 22933
By: Compiled:
1K R1 R5 R17 R22 R36 R49 R68 R79 R82 R83 R84 R117 R119 R261 R289 R290 33000-031
R305 R307 R311 R314 R315 R316 R321
100K R3 R9 R11 R19 R26 R32 R37 R60 R63 R75 R76 R77 R78 R95 R99 R100 R101 33000-042
R102 R110 R118 R120 R254 R264 R265 R279 R280 R281 R282 R298
R310 R324 R327 R328
10K R7 R14 R24 R27 R28 R30 R40 R41 R44 R47 R52 R55 R57 R58 R59 R61 33000-037
R69 R73 R80 R81 R87 R88 R90 R91 R93 R94 R96 R104 R105 R106 R107
R108 R109 R111 R112 R113 R114 R115 R122 R226 R227 R228 R229 R230
R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R243
R244 R245 R246 R247 R266 R268 R273 R283 R284 R285 R286 R287 R288
R293 R294 R295 R296 R297 R300 R301 R302 R313 R319 R320 R322 R323
R325 R326
2.2K R10 R12 R18 R38 R53 R54 R258 R259 R312 33000-033
100R R13 R20 R253 R260 R262 R303 R304 R309 R329 R330 R331 33000-029
1R R16 33000-014
10R R21 R42 R43 R45 R46 R85 R86 R89 33000-021
6.8K R23 33000-036
1M R33 R48 R62 R121 R248 R249 33000-044
10M R35 26837-130

22K R66 R255 R256 R257 R277 33000-038

680R R97 33000-135
33K R116 R269 R270 R271 R272 R275 R276 33000-039
0R R224 R225 R299 33000-105
10M R267 R308 33000-005
1.5M R278 33000-063
10K RV1 34000-001
SCREEN 4PIN SC1 5131-396
0 SK1 SK2 25418-217

0 SK10 35965-002

0 SW1 SW2 35975-001

2N4393 TR1 TR6 TR14 TR15 TR16 28863-165

BCW32 TR4 TR12 TR13 31000-001
BCF29 TR5 TR17 31000-004
ZRC250 VR1 31000-029
7805 VR2 28863-138
7808 VR3 28863-321
7908 VR4 28900-109
0 XL1 XL2 35000-012
0 XL4 28900-031

75
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.7 5Kv Board BOM – circuit diagram 6270-300 issue 10
5kv Board Bill of Materials
Value Part Reference PARTNUM
47n C1 C6 C8 C9 C12 C14 26970-087
220u C2 C4 27889-869
100nF C3 C5 C24 C27 32000-004
1n C7 32000-027
33nF C10 32000-019
470nF C11 32000-042
47n C13 32000-008
100n C20 C33 C41 27889-836
100n C21 C35 32000-029
10nF C22 C25 32000-025
47u C23 26970-103
10n C26 27889-809
2.2n C28 C29 32000-006
470p C30 32000-002
100pF C31 32000-030
470u C32 C42 26970-080
220u C34 C36 27889-700
47nF C39 26970-150
10n C40 27889-890
LL4148 D16 D48 (D9 & D11 not fitted) 31000-002
1N4002 D15 D18 D19 D20 28862-927
BY203-20S D21 D22 D23 D24 D25 D31 29400-019
BZX79C10 D36 28920-018
BYW29E-100 D43 28920-073
BZT03C18 D44 D50 28920-024
BZX79C7V5 D45 28862-891
HLMP1340 D47 28920-085
BZT03C68 D49 28920-044
BYV10-30 D51 28920-067
BZX84C10 D52 D53 31400-006
0 FS1 FS2 25950-016
CA3240E IC1 20000-020
LM311 IC4 31000-012
CA3140M IC5 30000-013
LM339 IC6 31000-005
LINK DUMMY LKD1
0 PL2 PL3 PL4 PL10 PL11 PL12 25424-932
0 PL5 PL13 25257-668
0 PL7 PL8 25960-045-03
100M R1 R10 26836-558
750K R2 26837-066
10K R6 R7 R67 R69 R77 R83 R92 R95 R115 R118 R119 R123 33000-037
12K R8 33000-059
4.7K R9 R18 R58 R71 R91 33000-035
8.2K R11 R15 R20 R27 R51 R148 R150 R152 R153 R154 26837-148
6.8M R13 26836-731
10K R17 R96 R34 R35 33000-012
100K R21 R28 33000-042
120K R29 33000-018
1M R30 R31 R116 33000-044
5K R32 26950-010

76
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
15K R33 R59 R66 R73 33000-026
2.2K R38 R76 33000-033
47K R41 R44 R70 R72 33000-040
1.5K R56 R125 33000-032
33K R57 33000-039
22K R60 R61 R63 33000-038
1K R62 R120 R121 R156 33000-031
100R R64 R65 33000-029
10R R68 33000-021
82K R78 26837-210
12K R82 26900-212
10R R85 33000-027
1K R87 33000-010
0R R88 33000-105
3.9K R90 R93 33000-116
6.8K R94 33000-036
100K R110 R111 26837-151
10K R112 R129 R130 R131 26837-158
470K R113 33000-100
33M R114 R117 R122 R124 26836-741
4.7M R126 R127 26837-189
47K R128 R155 26900-137
2.2K R149 R151 26900-206
75K R157 26900-094
RL1 RL2 RL3 RL4 25980-056
SK8 SK9 SK13 SK14 (Fuse Clip) 25418-213
SK10 25965-189
BCF29 TR1 31000-004
BCW32 TR2 TR3 TR4 TR6 TR12 TR13 TR14 31000-001
IRF530 TR5 20000-531
2N7002 TR10 TR11 31000-016
TX2 6132-051
TX3 6231-629
7808 VR1 28863-321

77
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
7.8 10Kv Board BOM - circuit diagram 6270-301 issue 6
10kv Board Bill of Materials
Value Part Reference PARTNUM
100n C1 C8 C11 C12 C39 27889-836
10n C3 27889-890
470u C4 C40 26970-080
220u C5 C6 27889-700
10n C7 27889-809
220u C9 C10 27889-869
47u C13 26970-103
47n C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 26970-087
15nF C25 26970-174
470nF C26 C28 32000-042
2.2n C27 C34 32000-006
10nF C29 C36 32000-025
100n C30 C32 C43 32000-029
100nF C31 C37 32000-004
470p C33 32000-002
100pF C35 32000-030
33nF C38 32000-019
1n C41 32000-027
10uF C42 32000-022
BZX79C7V5 D1 28862-891
BYW29E-100 D2 28920-073
BZT03C18 D3 D26 28920-024
1N4002 D4 D5 D7 D21 28862-927
BZT03C82 D6 29500-003
BY203-20S D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 29400-019
BZX79C10 D19 28920-018
HLMP1340 D20 28920-085
LL4148 D24 (D22 D23 not fitted) 31000-002
BYV10-30 D25 28920-067
BZX84C10 D27 31400-006
FS1,FS2 25950-016
CA3240E IC1 20000-020
CA3140M IC2 30000-013
LM339 IC3 31000-005
LM311 IC4 31000-012
INDUCTOR L1 L2 L3 35000-026
LINK DUMMY LKD1
PL1 PL3 PL6 PL7 PL8 PL9 25424-932
PL2 PL10 25257-668
PL4 PL5 25960-045-03
8.2K R1 R4 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 26837-148
R33 R34 R35
56K R2 26900-155
47K R3 R5 26900-137
4.7M R6 R7 26837-189
750K R8 26837-066
39K R9 26900-214
6.8M R10 26836-731
5K R11 26950-010
100M R12 R13 26836-558
10K R16 R17 R36 R37 R38 R39 R40 R41 R127 R128 R129 26837-158
10K R43 R46 R44 R49 33000-012

78
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:
3.9K R47 R71 33000-116
6.8K R48 33000-036
1K R50 33000-010
1.5K R51 33000-032
15K R54 R88 R115 R118 33000-026
4.7K R55 R62 R72 R116 R119 33000-035
10K R56 R69 R73 R74 R75 R77 R84 R95 R97 R111 R112 33000-037
22K R57 R81 R82 33000-038
100R R58 R60 33000-029
33K R59 33000-039
10R R61 R68 33000-027
1M R63 R64 R101 33000-044
2.2K R65 R76 33000-033
100K R66 R80 33000-042
47K R67 R86 R89 R98 R100 33000-040
0R R85 33000-105
1K R94 R96 R120 R126 33000-031
120K R114 33000-018
12K R117 33000-059
2.2K R124 R125 26900-206
33K R130 26900-152
39K R131 R132 R133 R134 26837-142
RL1 25980-064
SK2 SK4 SK19 SK20 (fuse clips) 25418-213
SK16 25965-189

79
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Section 8. Test and Calibration Specifications.

Refer to PC program ‘MIT5XX, MIT10XX, S1-5XX, S1-10XX Test and Calibration Software’. This program directs the
instrument through the calibration procedure via a communication link between the PC and the instrument. The
person calibrating the instrument attaches the various calibrated components when prompted. For more information
on how to use the software please read the online help files distributed with the software.

The software is available for download from the Megger Limited website part number (6111-759). Support files for
this will have to be downloaded from the Microsoft™ website. A CD version (6111-760) (including the necessary
support files) is available on request.

80
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Appendix1 Common Faults

Symptom Cause Fix

Unit does not output HV, but seems to work
HV enable jumper has fallen off HV board. Replace jumper
normally
Capacitance lead broken / not present Replace lead
No Capacitance measurement
Capacitance measuring circuit broken Replace measurement board
IrDA transceiver broken. Change either display or measurement board
Unit produced E78 on start-up. Transformer lead broken / not connected Connect lead or replace transformer
Incompatible measurement board software Change measurement board
Unit produced E78 at the end of a test IrDA screen missing from one board Change board with missing screen.
Measurement board was not powered down when
Unit produced E82 on start-up Change Power supply board.
the unit was turned off
Unit produces “Bad CNF” or “No Ser” on
Serial board missing broken Check / Replace serial board
start-up

81
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Appendix 2 Firmware Error Codes.

Error Code Error Cause and description

1 to 11 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
12 Buzzer drive is unstable.
13 Buzzer drive pull down has failed.
14 EEPROM receive has failed.
15 EEPROM send has failed.
16 EEPROM did not acknowledge the command.
17 Non specific EEPROM error.
18 to 28 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
29-76 Not valid error codes
77 Incompatible display and measurement software
78 No communications with high voltage module.
79 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
80 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
81 Transmission to high voltage module failure
82 Measurement board comms reception time out.
83 to 91 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
92 Unknown type of high voltage board detected
93 No high voltage board detected
94 to 127 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
128 Test start key pressed during startup
129 to 146 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
147 Battery calibration result out of range
148 Battery calibration took too long
149 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
150 Capacitance measurement time out
151 to 156 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
157 Invalid model type
158 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
159 ADC running too fast
160 ADC running too slow
161 Unknown current filter on measurement PCB
162 to 165 Internal Software Error. Please report this to Megger with details on how to repeat the fault.
166 ADC not responding
167 to 181 Internal Software Error. Please report this to Megger with details on how to repeat the fault.

82
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Appendix 3. Firmware Updates.

Release Date of release Display board Measurement board

Initial July 2005 98.98 98.98
Added MITx20 January 2006 0.89 0.75
Added S1-x52 February 2006 0.91 0.90
Major bug fixes March 2006 0.93 0.93
Merged code August 2006 1.06 1.05
Added S1-x54 December 2006 1.07 1.07

The firmware is designed to work only in the combinations specified above. If the measurement board and
display board have incompatible firmware the unit will produce either E77 or E78 depending on the
difference in versions. To check the software versions note the numbers displayed briefly in the top corners
of the display during initialisation immediately after switching the unit on. The number on the left is the
display board version; the number on the right is the measurement board version (if available). Divide each
number by 100 to obtain the software version.

83
 SERVICE MANUAL Number 6172-999
Issue 2
AF008-02-1201
Date 17-01-07
1st Used On: MIT5XX/10XX Compiled S.Mynott Date 08/08/06 CN Number 22933
By: Compiled:

Appendix 4. Spare Parts List.

Comments
Display Window 5110-514
I/O Cover 5210-451 Communication port cover
Rubber Keypad Moulding (MIT51X) 5410-390
Rubber Keypad Moulding (MIT52X, MIT102X) 5410-391
Front Panel Cover 5410-387 Inner grey fascia moulding
Module Housing Cover 5410-389 Interior clear isolation moulding
Module Base Housing 5410-388 Inner grey lower moulding
Shutter cover 5110-512 Retains terminal shutters
Positive & Guard Hv socket connector 5152-174 Positive and Guard terminals
Negative socket connector 5152-313 Negative terminal
Guard Plate 5131-394
Leakage Spring 5160-336
Socket Mount 5410-371
Label Set (MIT52X & MIT102X) 5270-828
Label Set (MIT51X) 5270-827
Label Set (S1-552/1052) 5270-939
Label Set (S1-554/1054) 5270-940
Battery 12V 4.0Ah lead acid 25985-030 See Note 2
Battery lead (MIT5XX & MIT10XX) 6180-454 Fuse 25950-057 required
Battery 5A fuse , 32V fast 25950-057 In line fuse from battery
3.15A(F) HBC 20mm fuse (Power PCB) 25413-280 1 off used per Power PCB
2A (T) 20mm fuse (HV PCB) 25950-016 2 off used per 10kv or 5kv HV Board
500mA Fuse (FF) 30KA 660V 32mm (Meas PCB) 25950-034 1 off used per Measure board
Plug IEC 2-pin panel mtg 25960-117 Mains connector (instrument)
Hv Lead Set (3x3m) 10kv 8101-181
Polypropylene Carry Case 6480-078 Outer carry case
Accessories Bag (MIT5XX & MIT10XX) 6320-243
Quickstart guide (MITX20 & S1-XXX) 6172-919
Quickstart guide (MIT510) 6172-915
PC AT-AT serial link cable (RS232) 25955-025
USB type A to type B cable 25970-041 USB cable
Download Manager software CD 6111-442
User Guide and Quickstart CD (MIT510) 6172-929
User Guide and Quickstart CD (MIT520/1020) 6172-960
User Guide and Quickstart CD (S1-552/1052/554/1054) 6172-988
Keyboard PCB (MIT5XX & 10XX) 6231-716
Power PCB (MIT5XX & 10XX) 6331-804 See Note 2 Mains SMPS. Uses 1 fuse(25413-280)
5KV PCB (MIT5XX) 6430-857 See Note 1 Uses 2 fuses 25950-016
10KV PCB (MIT10XX) 6430-855 See Note 1 Uses 2 fuses 25960-016
Measure PCB (MIT5XX &10XX) 6430-859 See Notes 1, 3 , 4 Uses 1 fuse 25950-034(Guard fuse).
Supply with 2 off cable tie. 25274-417.
Measure PCB (S1-X54) 6430-879 See Notes 1, 3 , 4 Uses 1 fuse 25950-034(Guard fuse).
Supply with 2 off cable tie. 25274-417.
Display PCB (MIT5XX & 10XX) 6430-861 See Notes 1, 2, 4
Serial Interface (MIT51X) 6231-756 Non isolated RS232 output
Serial / USB (MIT52X, MIT102X) 6231-758 Isolated USB & RS232 outputs
Isolation transformer (MIT5XX & MIT10XX) 6231-766 Supply with 1 off cable tie 25945-001.
Supply with 1 off cable tie 25274-417.
10KV transformer (MIT10XX) 6231-715
5KV transformer BM11D (MIT5XX) 6231-629
Cable tie 100 x 2.5mm 25274-417 Used to secure measure board wiring
And isolation transformer wiring
Cable tie 203 x 2.5mm 25945-001 Used to secure isolation transformer
Relay 10KV (MIT10XX) 25980-064 1 off per instrument
Relay SP c/o 250VAC (MIT5XX) 25980-056 4 off per instrument
Mains lead UK/IEC 25970-028
Mains lead EUR/IEC 6180-334
Mains lead US/IEC 25970-002
Windows Calibration Software for Authorised Repairers

Note 1. The instrument must be recalibrated after board exchange.

Note 2. The battery must be recalibrated after board exchange.
Note 3. The Display PCB firmware may need to be updated after board exchange.
Note 4. Boards will be supplied with the most up to date firmware unless specified otherwise. Refer to appendix 3.

84