Service Manual: Panel Assy (A62-1187-13) Knob (VOL) (K29-9498-03) Knob (ENC) (K29-9499-03)
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Heru susantoService Manual: Panel Assy (A62-1187-13) Knob (VOL) (K29-9498-03) Knob (ENC) (K29-9499-03)
Uploaded by
Heru susanto144MHz FM TRANSCEIVER
TM-281A
SERVICE MANUAL
© 2011-8 PRINTED IN JAPAN
B51-8988-00 (N) 217
Knob (VOL) Knob (ENC) Panel assy
(K29-9498-03) (K29-9499-03) (A62-1187-13)
Modular jack (MIC) Key top
(E58-0535-05) (K29-9497-01)
CONTENTS
DISASSEMBLY FOR REPAIR ......................2 TERMINAL FUNCTION .............................29
CIRCUIT DESCRIPTION ..............................5 PC BOARD
COMPONENTS DESCRIPTION...................9 TX-RX UNIT (X57-8130-XX)..................30
SEMICONDUCTOR DATA .........................11 SCHEMATIC DIAGRAM ............................36
PARTS LIST ...............................................12 BLOCK DIAGRAM .....................................40
EXPLODED VIEW ......................................18 LEVEL DIAGRAM ......................................42
PACKING....................................................19 SPECIFICATIONS ...................BACK COVER
ADJUSTMENT ..........................................20
This product complies with the RoHS directive for the European market. This product uses Lead Free solder.
TM-281A
Document Copyrights Disclaimer
Copyright 2011 by Kenwood Corporation. All rights re- While every precaution has been taken in the preparation
served. of this manual, Kenwood assumes no responsibility for er-
No part of this manual may be reproduced, translated, rors or omissions. Neither is any liability assumed for dam-
distributed, or transmitted in any form or by any means, ages resulting from the use of the information contained
electronic, mechanical, photocopying, recording, or other- herein. Kenwood reserves the right to make changes to any
wise, for any purpose without the prior written permission products herein at any time for improvement purposes.
of Kenwood.
DISASSEMBLY FOR REPAIR
1. Disassembly Procedure 2. To remove the panel assembly, first turn the transceiver
upside down.
1. When removing the cabinet, first remove the two screws Then, insert a flat-head screwdriver into the holes of the
from the right and left with a phillips screwdriver. chassis and tilt it in the direction as shown by the arrow.
Then, hook your finger on the edge of the cabinet and pull
it out until it is over the chassis protrusion. Remove the
cabinet by prying the cabinet as shown below. Holes
Cabinet
Panel assembly
2
TM-281A
DISASSEMBLY FOR REPAIR
3. Disconnect the flat cable from the connector of the panel 5. When removing the TX-RX PCB, first remove the solder
assembly. of the antenna hot pin and positive terminal of the DC
cord.
Then, remove the 15 screws from the TX-RX PCB, power
module, and audio amp.
Positive terminal
of the DC cord Antenna hot pin
Audio amp
Flat cable
4. To remove the Display PCB, first remove the volume
knob q.
Then, remove the encoder knob w.
Remove the two screws e from the Display PCB using a Power module
phillips screwdriver.
Remove the speaker holder of the key top from the TX-RX PCB
speaker. r
Remove the Display PCB with the speaker from the panel
assembly. t Note:
When you supply power to the TX-RX PCB after removing
the TX-RX PCB from the chassis, solder the positive and
.
ground terminals of the DC cord (recommendation: E30-
3448-25) to the +B and GND terminals of the TX-RX PCB.
;
.
=
+B
Speaker holder
GND
of the key top
Panel assembly
Display PCB TX-RX PCB
Component side
3
TM-281A
DISASSEMBLY FOR REPAIR
6. Pull it out behind the chassis by rotating the bush e of 2. When mounting the panel assembly, pass the flat cable
the DC cord 90 degrees in the direction of the arrow after through the hole of the chassis as shown below, then
the screw q in the negative terminal is removed, and the connect the flat cable to connector of the panel assembly.
positive terminal w is removed from the chassis.
DC cord Panel assembly
:
@
.
Hole of Panel
the chassis assembly
Chassis
Chassis
3. Fit the panel assembly into the two tabs of the chassis
top side first.
Then, fit the panel assembly into the two tabs of the
chassis bottom side by turning the panel assembly.
Tabs
Panel assembly
2. Precautions for Reassembly
1. Mount the key top and speaker onto the panel assembly.
Then, tighten the two screws q of the Display PCB.
Insert the protrusion area of the key top into the groove
area of the panel assembly using a flat-head screwdriver.
w
Then, mount the encoder knob e and volume knob r.
: Speaker @
3. How to Mount the AF PA IC (IC715)
Solder it onto the TX-RX unit (A/2) so that the AF PA IC
: part number label “LA4600” is on the reverse side.
Key top
Panel assembly
IC715
Display PCB Pin 1 marker
TX-RX UNIT (X57-8130-XX) (A/2)
: TX-RX section
Component side
4 ;
TM-281A
CIRCUIT DESCRIPTION
Frequency Configuration ■ IF Amplifier
The first IF signal is amplified by Q503, and then goes to
The receiver utilizes double conversion. The first IF is
IC501 (FM processing IC). The signal is heterodyned again
49.95MHz and the second IF is 450kHz. The first local oscil-
with a second local oscillator signal within IC501 to create
lator signal is supplied from the PLL circuit.
a 450kHz second IF signal. The second IF signal is then
The PLL circuit in the transmitter generates the neces-
fed through a 450kHz ceramic filter (Wide: CF501, Narrow:
sary frequencies. Figure 1 shows the frequencies.
CF502) to further eliminate unwanted signals before it is
ANT CF 450kHz amplified and FM detected in IC501.
1st MCF
MIX 49.95MHz Item Rating
ANT RF IF SYSTEM AF SP
SW AMP PA Nominal center frequency 49.95MHz
50.4MHz Pass bandwidth ±4.0kHz or more at 3dB
x3
multiply 50dB stop bandwidth ±25.0kHz or less
Ripple 1.0dB or less
TCXO 16.8MHz Insertion loss 5.0dB or less
RX Guaranteed attenuation 80dB or more at fo ± 900kHz
1/2 MIC
POWER RF PLL/VCO AMP MIC Spurious 50dB or more at fo ± 1MHz
AMP AMP TX
Terminating impedance 270Ω / 8.5pF
Fig. 1 Frequency configuration
Table 1 Crystal filter (L71-0655-05): XF501
Item Rating
Receiver System
Nominal center frequency 450kHz
The receiver is a double conversion superheterodyne.
The frequency configuration is shown in Figure 1. 6dB bandwidth ±7.5kHz or more
50dB bandwidth ±15.0kHz or less
■ Front-end RF Amplifier Ripple 2.0dB or less
An incoming signal from the antenna is applied to an RF
Insertion loss 6.0dB or less
amplifier (Q505) after passing through a transmit/receive
switch circuit (D309, D311, D306 and D307 are off) and Guaranteed attenuation 35.0dB or more within fo ± 100kHz
a band pass filter (L515, L514 and varactor diodes: D509, I/O matching impedance 1.5kΩ
D508). After the signal is amplified, the signal is filtered
through a band pass filter (L511, L510 and varactor diodes:
Table 2 Ceramic filter (L72-1034-05): CF501
D506, D505) to eliminate unwanted signals before it is
passed to the first mixer. Item Rating
The voltage of these diodes are controlled by tracking the Nominal center frequency 450kHz
MCU (IC707) center frequency of the band pass filter. (See
6dB bandwidth ±4.5kHz or more
Fig. 2.)
50dB bandwidth ±10.0kHz or less
■ First Mixer Ripple 2.0dB or less
The signal from the RF amplifier is heterodyned with the Insertion loss 6.0dB or less
first local oscillator signal from the PLL frequency synthesiz-
Guaranteed attenuation 60.0dB or more within fo ± 100kHz
er circuit at the first mixer (Q504) to create a 49.95MHz first
intermediate frequency (1st IF) signal. The first IF signal is I/O matching impedance 2.0kΩ
then fed through the monolithic crystal filter (MCF: XF501) Table 3 Ceramic filter (L72-0999-05): CF502
to further remove spurious signals.
CF501 (Wide)
ANT
CF502 (Narrow)
L515,L514 L511,L510
D306,D307 D509,D508 Q505 D506,D505 Q504 XF501 Q503 IC705
D309,D311 BPF RF AMP BPF MIX MCF IF AMP D/A CONVERTER
ANT IC501
FM IC W/NO
SW (EVOL2)
TV IC2 X1 Q501
1/2 divider TCXO x3 multiply
IC706 IC705 MCU
DC AMP D/A 1st local OSC (VCO/PLL)
Fig. 2 Receiver system
5
TM-281A
CIRCUIT DESCRIPTION
■ Wide/Narrow Switching Circuit ■ Squelch Circuit
The Wide port (pin 65) and Narrow port (pin 64) of the The detection output from the FM IC (IC501) passes
MCU is used to switch between ceramic filters. When through a noise amplifier (Q502) to detect noise. A volt-
the Wide port is high, the ceramic filter SW diodes (D501, age is applied to the MCU (IC707). The MCU controls the
D502) cause CF501 to turn on to receive a Wide signal. squelch according to the voltage (SQIN) level. The signal
When the Narrow port is high, the ceramic filter SW di- from the RSSI pin of IC501 is used for the S-meter. The
odes (D501, D502) cause CF502 to turn on to receive a Nar- electric field strength of the receive signal can be known
row signal. (See Fig. 3.) before the SQIN voltage is input to the MCU, and the scan
stop speed is improved.
IC501
FM IC Q502
IF_IN MIX_O IC501 NOISE AMP D503 IC707
FILOUT SQIN
R504 DET
Wide FM IC MCU
CF501 IC707 65pin RSSI RSSI
(Wide) R506
Fig. 5 Squelch circuit
CF502
D501 (Narrow) D502
PLL Frequency Synthesizer
The PLL circuit generates the first local oscillator signal
R505
R507
for reception and the RF signal for transmission.
Narrow ■ PLL
IC707 64pin
The frequency step of the PLL circuit is 5 or 6.25kHz. A
Fig. 3 Wide/Narrow switching circuit 16.8MHz reference oscillator signal is divided at IC1 by a
fixed counter to produce the 5 or 6.25kHz reference fre-
■ AF Signal System quency. The voltage controlled oscillator (VCO) output sig-
The detection signal from the FM IC (IC501) goes to the nal is buffer amplified by Q9, then divided in IC1 by a dual-
D/A converter (IC705) to adjust the gain and is output to the module programmable counter. The divided signal is com-
AF filter (IC709) for characterizing the signal. The AF signal pared in phase with the 5 or 6.25kHz reference signal in the
output from IC709 and the DTMF signal, BEEP signal are phase comparator in IC1. The output signal from the phase
summed and the resulting signal goes to the D/A converter comparator is filtered through a low-pass filter and passed
(IC705). The AFO output level is adjusted by the D/A con- to the VCO to control the oscillator frequency. (See Fig. 6.)
verter. The signal output from the D/A converter is input to
the audio power amplifier (IC715). The AF signal from IC715 ■ VCO
switches between the internal speaker and the speaker jack Double the operating frequency is generated by Q6 in
(J701) output. (See Fig. 4.) transmit mode and Q4 in receive mode. The oscillator fre-
quency is controlled by applying the VCO control voltage,
IC501 IC705
W/NO IC709 IC705 IC715 SP obtained from the phase comparator, to the varactor diodes
D/A (EVOL2) AF D/A (D4 and D6 in transmit mode and D3 and D5 in receive
FM IC CONV. AF PA mode). The TX/RX pin is set high in receive mode causing
Filter CONV.
Q7 and Q5 to turn Q6 off, and turn Q4 on. The TX/RX pin is
Fig. 4 AF signal system set low in transmit mode. The outputs from Q4 and Q6 are
amplified by Q9 and sent to the RF amplifiers through a 1/2
divider (IC2). (See Fig. 6.)
IC1 : PLL IC
Q6 Q3
5kHz/6.25kHz TX VCO AMP
1/N Q9
BUFF
Q1,Q2 LPF AMP IC2
Phase Charge D4,D6 1/2
PLL
comparator pump Q4 RF amplifiers
DATA divider
REF RX VCO
OSC Q5,Q7
1/M T/R SW
5kHz/6.25kHz
D3,D5 TX/RX (MCU)
16.8MHz
Fig. 6 PLL circuit
6
TM-281A
CIRCUIT DESCRIPTION
■ Unlock Circuit Transmitter System
During reception, the 8RC signal goes high, the 8TC
signal goes low, and Q708 turns on. Q710 turns on and a ■ Outline
voltage is applied to 8R. During transmission, the 8RC sig- The transmitter circuit produces and amplifies the desired
nal goes low, the 8TC signal goes high and Q709 turns on. frequency directly. It FM-modulates the carrier signal by
Q711 turns on and a voltage is applied to 8T. means of a varicap diode.
The MCU monitors the PLL IC (IC1) LD signal directly.
When the PLL is unlocked during transmission, the PLL LD ■ Power Amplifier Circuit
signal goes low. The MCU detects this signal and makes The transmit output signal from the VCO passes through
the 8TC signal low. When the 8TC signal goes low, no volt- a 1/2 divider (IC2) and the transmission/reception selection
age is applied to 8T, and no signal is transmitted. (See Fig. 7.) diode (D9, D10) and is amplified by Q303. The amplified
signal goes to the power module (IC302) through a low-pass
8C filter. The low-pass filter removes unwanted high-frequency
Q710 Q711 harmonic components, and the resulting signal is transmit-
8R 8T ted through the antenna terminal. (See Fig. 8.)
SW SW
■ APC Circuit
Q708 Q709
SW SW
The automatic transmission power control (APC) circuit
detects part of a final amplifier output with a diode (D313,
8RC 8TC D314) and applies a voltage to IC303. IC303 compares the
APC control voltage (PC) generated by the D/A converter
LD (IC705) and DC amplifier (IC706) with the detection output
IC707 IC1
MCU PLL voltage. IC303 generates the voltage to control the Vgg of
IC302 and stabilizes the transmission output.
PLL lock The APC circuit is configured to protect over current of
: LD “H”
IC302 due to fluctuations of the load at the antenna end and
Fig. 7 Unlock circuit to stabilize transmission output at voltage and temperature
variations. (See Fig. 9.)
MIC IC703 IC704 IC706 IC705 IC706
SPLATTER SUM D/A
MIC/IDC BUFFER
FILTER AMP CONVERTER
IC101
MIC KEY
MCU
INPUT
ANT
IC705 Q6 Q9 IC2 Q10 Q303 IC302
D/A 1/2 DRIVE POWER
VCO BUFFER RF AMP
CONVERTER DIVIDER AMP MODULE
X1 Q3
TCXO
PLL RF AMP
16.8MHz
IC1
Fig. 8 Transmitter system
ANT
D306,D307
Q303 IC302 D309,D311
DRIVE POWER ANT
D9 LPF
AMP MODULE SW
IC706
DC (PC) APC POWER
IC705
AMP CONTROL DET
(PC/TVO)
IC303 D313,D314
Fig. 9 APC circuit
7
TM-281A
CIRCUIT DESCRIPTION
Control Circuit ■ Key Matrix Circuit
The front panel has function keys. Each of them is con-
The MCU carries out the following tasks (See Fig. 10.):
nected to a cross point of a matrix of the KI1 to KI3 and KSI
1) Controls the WIDE, NARROW, and TX/RX outputs.
to KS2 ports of the LCD driver.
2) Controls the display circuit.
The LCD driver monitors the status of the KI1 to KI3 and
3) Controls the PLL IC (IC1).
KS1 to KS2 ports. If the state of one of the ports changes,
4) Controls the D/A converter (IC705) and adjusts the vol-
the LCD driver assumes that the key at the matrix point cor-
ume, modulation and transmission power.
responding to that port has been pressed.
CK
IC705 FUNC CALL
DT
D/A
EVLLD converter
IC707 REV VFO
MCU
KI1
IC1
PLL KI2 MHz
PLLE (Encoder) MR
IC901 KI3
LCD
Fig. 10 Control circuit driver KS2
KS1
■ Memory Circuit Fig. 13 Key matrix circuit
The transceiver has an 64k-bit EEPROM (IC708). The EE-
PROM contains adjustment data. The MCU (IC707) controls
■ Encode
the EEPROM through three serial data lines. (See Fig. 11.)
The CTCSS and DCS signals are output from TONE of the
MCU (IC707). The DTMF signal is output from DTMF of the
EEPCK
MCU (IC707). These signals are summed with a MIC signal
IC707 EEPSDT IC708 by the summing amplifier (IC706), and the resulting signal
MCU EEPWP EEPROM goes to the D/A converter (IC705) to adjust the MOD level,
and then goes to the buffer amplifier (IC706).
Part of the signal goes to the TCXO, and the rest goes to
Fig. 11 Memory circuit the D/A converter (IC705) in order to adjust the modulation
balance between the VCO and TCXO.
■ Display Circuit
TONE IC706
The MCU (IC707) controls the display LCD and LEDs. IC705 IC706 X1 IC1
SUM
DTMF D/A BUFFER TCXO PLL
When power is on, the LCD driver will use the BL line to AMP
control the LCD illumination and key backlight LEDs.
The brightness function is controlled by switch Q904. IC707 MIC
The LCD driver (IC901) and MCU (IC707) communicate MCU IC705
VCO
D/A
through the CE, CL, DI, and DO lines. (See Fig. 12.)
CE Amp
COM0~
CL
IC707 IC901 COM3 Fig. 14 Encode
DO LCD
MCU LCD SEG0~
DI driver SEG30
■ Decode
BL
• CTCSS/DCS
The signal (W/NO (EVOL2)) goes to DTMF IN (pin 95) of
the MCU (IC707) through the amplifier (IC709). The CTCSS/
Q902 Q901
SW SW
DCS signal will pass through the low-pass filters in the MCU
D903~D905 (IC707) and be decoded within the MCU (IC707).
Q903
SW IC707
D906~D911 MCU
95 IC709
Q904 DTMF IN AMP W/NO (EVOL2)
BRI
SW
Fig. 15 Decode
Fig. 12 Display circuit
8
TM-281A
CIRCUIT DESCRIPTION
■ D/A Converter on MCU port 18 (INT) if B line becomes less than approxi-
The D/A converter (IC705) is used to adjust the MO mod- mately 9.5V. The MCU will then send the backup data to the
ulation, AF volume, TV voltage, FC reference voltage, and EEPROM (IC708) and enter stop mode.
PC POWER CONTROL voltage level. This circuit has an overvoltage protection circuit. If a DC
Adjustment values are sent from the MCU as serial data. voltage of 18V or higher is applied to the base of Q707, this
The D/A converter has a resolution of 256 and the following voltage turns Q707 on and will set to high on MCU port 18
relationship is valid: (INT). The MCU will then send the backup data to the EE-
D/A output = (Vin – VDAref) / 256 x n + VDAref PROM (IC708) and enter stop mode. (See Fig. 16.)
Vin: Analog input
VDAref: D/A reference voltage (Approx. 2.2V) SB B
Q714
n: Serial data value from the microprocessor (MCU) SW
Power Supply Circuit Q713 D710
Q707
D712
SW SW
When the power switch on the display unit is pressed,
the power port on the display unit which is connected to SBC
IC707
port 17 (POWER), goes low, then port 82 (SBC) goes high, MCU 5M 5M IC713
Q713 turns on, SB SW (Q714) turns on and power (SB) is AVR
supplied to the radio.
R824
POWER
When the DC power is supplied to the radio, the volt-
INT
RESET
age regulator IC (IC713) is supplied to the MCU VDD and IC714
reset voltage detect IC (IC714). IC714 will generate a signal RST
(RESET) into the reset terminal of the MCU (IC707) to carry IC712
out a power ON reset. If DC power is less than approxi- INT
R825
mately 9.5V, the radio is unable to power on. POWER
SW
When the DC power voltage deceases from the normal
voltage, the INT voltage detector IC (IC712) will set to high
Fig. 16 Power supply circuit
COMPONENTS DESCRIPTION
TX-RX UNIT (X57-8130-XX) Ref. No. Use / Function Operation / Condition / Compatibility
Ref. No. Use / Function Operation / Condition / Compatibility Buffer amplifier/ SUM amplifier/
IC706 OP amplifier
DC amplifier/ 1/2 VCC
IC1 PLL IC Frequency control
IC707 MCU
IC2 Divider Frequency divider
IC708 EEPROM Tuning data/ Memory data
IC302 Power module TX final amplifier
IC709 OP amplifier Audio filter
IC303 APC controller TX power control
IC710 5V AVR 5C
FM detector/ 2nd mixer/ RSSI/
IC501 FM IC
Noise amplifier IC711 8V AVR 8C
IC703 OP amplifier MIC amplifier/ IDC IC712 Voltage detection MCU INT voltage detection
IC704 OP amplifier Splatter filter IC713 5V AVR 5M
Frequency adjustment IC714 Voltage detection MCU reset voltage detection
Modulation balance adjustment
AF level adjustment IC715 Audio amplifier Audio final amplifier
Digital
IC705 Backlight control IC901 LCD driver Display control
potentiometer
Modulation limit adjustment
Q1,2 Switching Charge pump
TX power/ BPF control
RX signal level control Q3 RF amplifier PLL Fin
9
TM-281A
COMPONENTS DESCRIPTION
Ref. No. Use / Function Operation / Condition / Compatibility Ref. No. Use / Function Operation / Condition / Compatibility
Q4 Oscillator RX VCO VCO frequency
D5 RX
control
Q5 T/R switch On when RX
VCO frequency
Q6 Oscillator TX VCO D6 TX
control
Q7 T/R switch
D7 VCO modulation
Q8 Ripple filter
D8 Ripple filter
Q9 Buffer amplifier Output of VCO
D9,10 RF switch TX/RX
Q10 RF amplifier Output of VCO
D301 Voltage protection 5.1V Zener diode
Q303 Drive amplifier TX driver
D305 Protection PC/TV
Q501 Tripler 16.8MHz × 3
D306,307 ANT switch On when TX
Q502 SQL amplifier Noise amplifier
D309 ANT switch On when TX
Q503 IF amplifier
D311 ANT switch On when TX
Q504 Mixer 1st mixer
Temperature
D312
Q505 RF amplifier LNA compensation
Q506 PC/TV switch On when TX APC voltage
D313,314
detect
Q701 AGC/ MIC mute
D316 Protection
Q702,703 Beat shift switch Active while beat shift is ON
D501,502 IF switch Wide/Narrow
Q704,705 AF mute Active while AFM is “H”
D503 Detection Noise squelch
Q706 Buffer amplifier RX audio
D504 Protection
Over voltage Active when PS voltage is more
Q707
detection than 18V D505,506 RF BPF tuning
Q708 DC switch (8R) Active while RX D508,509 RF BPF tuning
Q709 DC switch (8T) Active while TX D702 Surge absorption CM
Q710 DC switch (8R) Active while RX D704 Surge absorption MIC key
Q711 DC switch (8T) Active while TX D705 Surge absorption RXD
Q712 AF mute Active while SPM is “H” D706 Surge absorption PTT
Q713,714 DC switch (SB) Active when power is ON D708 MIC mute
Q715 AF mute Active while AMPSW is “H” D709 Detection AGC
Key backlight D710 Protection
Q901
switch
D711 Limiter
Q902 DC switch
Over voltage On when PS voltage is more
D712
LCD backlight detection than 18V
Q903
switch
Reverse connec-
D714
Brightness tion protection
Q904
function switch
Reverse connec-
D901
D1 Voltage dropped tion protection
D2 Ripple filter D902 Surge absorption 6.2V Zener diode
VCO frequency D903~905 LED Key backlight
D3 RX
control
D906~911 LED LCD backlight
VCO frequency
D4 TX
control
10
TM-281A
SEMICONDUCTOR DATA
MCU: 30622MEP540GU (TX-RX unit IC707)
Pin No. Name I/O Function Pin No. Name I/O Function
1 TONE O CTCSS/DCS output 53 DT O Common data
2 DTMF O DTMF/BEEP/1750Hz output 54 CK O Common clock
3 PLLE O PLL IC chip select 55 NC I Not used
4,5 NC I Not used 56 DST1 I Destination 1
6 GND - GND 57~59 DST2~DST4 I Destination 2~4
7 CNVSS - Not used 60 VCC - +5V
8 EVLLD O D/A converter chip select 61 NC I Not used
9 BSHIFT O Beat shift 62 VSS - GND
10 RESET I Reset 63 ADJ I For adjustment mode
11 XOUT O X’tal (8MHz) 64 NARROW O Narrow
12 VSS - GND 65 WIDE O Wide
13 XIN I X’tal (8MHz) 66,67 NC I Not used
14 VCC - +5V 68 CL O Clock for LCD
15 GND - GND 69 CE O Chip enable for LCD
16 NC I Not used 70 DO O Output data to LCD
17 POWER I Power key input 71 DI I Input data from LCD
18 INT I MCU stop 72 NC I Not used
19 NC I Not used 73 ENCB I Encoder input B
20 TX/RX O TX/RX 74 ENCA I Encoder input A
21 UL I PLL unlock detect 75,76 NC O Not used
22,23 NC I Not used 77 MICMT O MIC mute
24 EEPSDT I/O EEPROM data 78 NC I Not used
25 EEPCK O EEPROM clock 79 8RC O 8R control
26 EEPWP O EEPROM write protect 80 8TC O 8T control
27,28 NC I (Nch open drain) 81 NC I Not used
29 TXD1 O Not used 82 SBC O Battery switch
30 RXD1 I Not used 83~85 NC I Not used
31 CLKFLS I Not used 86 CM I MIC key check
32 BSYFLS O Not used 87 MICKEY2 I For AMR DTMF keypad MIC
33 TXD O To PC 88 MICKEY I For AMR DTMF keypad MIC
34 RXD I From PC 89 VOL I Volume encoder
35 PTT I PTT input 90 TEMP2 I Temperature 2
36~38 NC I Not used 91 TEMP1 I Temperature 1
39 EMPFLS I/O Not used 92 RSSI I RSSI input
40~43 NC I Not used 93 SQIN I Squelch input
44 CEFLS I/O Not used 94 AVSS - GND
45~49 NC I Not used 95 DTMF IN I CTCSS/DCS/1050Hz input
50 AFM O AF mute 96 VREF - +5V
51 SPM O Speaker mute 97 AVCC - +5V
52 AMPSW O AF AMP switch 98~100 NC I Not used
11
TM-281A
PARTS LIST
✽ New Parts. indicates safety critical components. L : Scandinavia K : USA P : Canada
Parts without Parts No. are not supplied. Y : PX (Far East, Hawaii) T : England E : Europe
Les articles non mentionnes dans le Parts No. ne sont pas fournis. C : China X : Australia M : Other Areas
Teile ohne Parts No. werden nicht geliefert.
TM-281A
TX-RX UNIT (X57-8130-XX)
Ref. No. New
Address parts Parts No. Description Desti- Ref. No. New
Address parts Parts No. Description Desti-
nation nation
C16 CK73HB1H102K CHIP C 1000PF K
TM-281A
C17 CK73HB1H103K CHIP C 0.010UF K
1 1B ✽ A02-4156-01 PLASTIC CABINET C18 CK73HB1E104K CHIP C 0.10UF K
2 2B ✽ A10-4152-01 CHASSIS C20,21 CK73HB1H471K CHIP C 470PF K
3 3A ✽ A62-1187-13 PANEL ASSY C23 CK73HB1H471K CHIP C 470PF K
5 3A B11-1809-03 ILLUMINATION GUIDE (LCD) C25 C92-0863-05 CHIP TNTL 0.047UF 35WV
6 3A B38-0885-15 LCD C27 C92-0588-05 CHIP TNTL 1.5UF 16WV
7 3C ✽ B62-2347-10 INSTRUCTION MANUAL K,M2 C28 CK73HB1H471K CHIP C 470PF K
7 3C ✽ B62-2348-10 INSTRUCTION MANUAL M3 C29 CS77CA1V0R1M CHIP TNTL 0.1UF 35WV
7 3C ✽ B62-2349-10 INSTRUCTION MANUAL M4 C34 CK73HB1H102K CHIP C 1000PF K
10 2B E04-0167-15 RF COAXIAL RECEPTACLE (M) C35 CC73HCH1H820J CHIP C 82PF J
11 2B E23-1346-04 GROUND TERMINAL (CLIP) C36 CC73HCH1H300J CHIP C 30PF J
12 3A E29-1201-04 INTER CONNECTOR (LCD) C38 CC73HCH1H100C CHIP C 10PF C
13 2B ✽ E30-7743-05 DC CORD C39 CC73HCH1H080B CHIP C 8.0PF B
14 1C ✽ E30-7744-05 DC CORD ACCESSORY C41 CC73HCH1H0R5B CHIP C 0.5PF B
15 2A ✽ E37-1542-05 FLAT CABLE C42,43 CK73HB1H471K CHIP C 470PF K
16 3A ✽ E37-1545-05 PARALLEL CORD (SP) C45 CC73HCH1H010B CHIP C 1.0PF B
C46 CC73HCH1H0R5B CHIP C 0.5PF B
18 1C F52-0024-05 FUSE (BLADE TYPE) 15A ACCESSORY C48 CK73HB1H102K CHIP C 1000PF K
C49 CC73HCH1H4R5B CHIP C 4.5PF B
19 3A ✽ G13-2370-04 CUSHION (LCD)
20 3A ✽ G53-1878-03 PACKING (PANEL) C50 CC73HCH1H100C CHIP C 10PF C
C51 CC73HCH1H050B CHIP C 5.0PF B
22 1D ✽ H12-4330-02 PACKING FIXTURE (RADIO) C52 CC73HCH1H110G CHIP C 11PF G
23 2D ✽ H12-4331-02 PACKING FIXTURE C53 CK73HB1H102K CHIP C 1000PF K
24 2D ✽ H52-2503-02 ITEM CARTON CASE K C54 CC73HCH1H0R3B CHIP C 0.3PF B
26 1C J19-1584-15 HOLDER (MIC) ACCESSORY C55 CC73HCH1H0R5B CHIP C 0.5PF B
27 3A J21-8463-03 MOUNTING HARDWARE (LCD) C56 CS77BB21C220M CHIP TNTL 22UF 16WV
28 2C J29-0726-03 BRACKET ACCESSORY C57 CK73HB1H471K CHIP C 470PF K
C58 CK73HB1H102K CHIP C 1000PF K
30 3A ✽ K29-9497-01 KEY TOP C59 CK73HB1H471K CHIP C 470PF K
31 3A ✽ K29-9498-03 KNOB (VOL)
32 3A ✽ K29-9499-03 KNOB (ENC) C60 CC73HCH1H060B CHIP C 6.0PF B
C61 CC73HCH1H030B CHIP C 3.0PF B
A 1A,1B N35-2604-43 BINDING HEAD MACHINE SCREW C62 CC73HCH1H020B CHIP C 2.0PF B
B 1A,1B,2B N67-3008-48 PAN HEAD SEMS SCREW C63 CK73HB1H102K CHIP C 1000PF K
C 3A N80-2008-48 PAN HEAD TAPTITE SCREW C64 CC73HCH1H221J CHIP C 220PF J
D 1B,2B N87-2608-48 BRAZIER HEAD TAPTITE SCREW
34 2C ✽ N99-2082-05 SCREW SET ACCESSORY C65,66 CK73HB1H102K CHIP C 1000PF K
C67 CC73HCH1H180J CHIP C 18PF J
36 3A T07-0779-05 SPEAKER C68-70 CK73HB1H102K CHIP C 1000PF K
37 1C T91-0624-65 MICROPHONE ACCESSORY M2 C71 CC73HCH1H390J CHIP C 39PF J
37 1C ✽ T91-0641-75 MICROPHONE (DTMF) ACCESSORY K,M3,M4 C72 CC73HCH1H180J CHIP C 18PF J
C306 CK73HB1H102K CHIP C 1000PF K
C308 CK73HB1H122K CHIP C 1200PF K
C309 CC73HCH1H060B CHIP C 6.0PF B
C310 CC73HCH1H080B CHIP C 8.0PF B
TX-RX UNIT (X57-8130-XX) -10: K -21: M2 -22: M3 -23: M4 C312 CC73HCH1H120J CHIP C 12PF J
D903-911 B30-2337-05 LED (YELLOW)
C318 CK73HB1H102K CHIP C 1000PF K
C1 CK73FB0J226M CHIP C 22UF M C328 CC73HCH1H130J CHIP C 13PF J
C3,4 CC73HCH1H101J CHIP C 100PF J C329 CK73HB1H102K CHIP C 1000PF K
C5,6 CK73HB1H102K CHIP C 1000PF K C330 CC73HCH1H2R5B CHIP C 2.5PF B
C7 CC73HCH1H101J CHIP C 100PF J C331 CK73HB1E223K CHIP C 0.022UF K
C9 CK73HB1E104K CHIP C 0.10UF K
C332 CC73HCH1H151J CHIP C 150PF J
C10 CC73HCH1H680J CHIP C 68PF J C333 CK73FB1A475K CHIP C 4.7UF K
C11 CK73HB1E104K CHIP C 0.10UF K C334 CK73HB1H102K CHIP C 1000PF K
C12 CK73FB1A106K CHIP C 10UF K C338 CK73HB1H102K CHIP C 1000PF K
C14 CK73HB1E104K CHIP C 0.10UF K C340 CC73HCH1H221J CHIP C 220PF J
C15 CK73FB1A106K CHIP C 10UF K
12
TM-281A
PARTS LIST
TX-RX UNIT (X57-8130-XX)
Ref. No. New
Address parts Parts No. Description Desti- Ref. No. New
Address parts Parts No. Description Desti-
nation nation
C342 CC73HCH1H101J CHIP C 100PF J C538 CK73HB1H103K CHIP C 0.010UF K
C343 CK73HB1H102K CHIP C 1000PF K C539 CC73HCH1H020B CHIP C 2.0PF B
C344,345 CC73HCH1H101J CHIP C 100PF J C541 CK73HB1H102K CHIP C 1000PF K
C347 CK73HB1E104K CHIP C 0.10UF K C544 CK73HB1E104K CHIP C 0.10UF K
C348 CK73HB1H102K CHIP C 1000PF K C545 CC73HCH1H130J CHIP C 13PF J
C350 CK73HB1H102K CHIP C 1000PF K C546 CC73HCH1H270J CHIP C 27PF J
C354 CC73HCH1H220J CHIP C 22PF J C547 CK73HB1H102K CHIP C 1000PF K
C355 CC73HCH1H470J CHIP C 47PF J C548 CK73HB1H103K CHIP C 0.010UF K
C356 CC73HCH1H220J CHIP C 22PF J C549,550 CK73HB1H102K CHIP C 1000PF K
C365 C93-0556-05 CHIP C 6.0PF D C551 CC73HCH1H101J CHIP C 100PF J
C394 CK73HB1E104K CHIP C 0.10UF K C552 CK73HB1H102K CHIP C 1000PF K
C395 CK73HB1H102K CHIP C 1000PF K C553 CC73HCH1H030B CHIP C 3.0PF B
C397 CK73HB1H102K CHIP C 1000PF K C554 CC73HCH1H240J CHIP C 24PF J
C399 CK73HB1H103K CHIP C 0.010UF K C555 CC73HCH1H010B CHIP C 1.0PF B
C400,401 CK73HB1H102K CHIP C 1000PF K C556 CK73HB1H102K CHIP C 1000PF K
C402 CK73HB1H103K CHIP C 0.010UF K C557 CC73HCH1H050B CHIP C 5.0PF B
C403 CC73GCH1H270J CHIP C 27PF J C558 CC73HCH1H330J CHIP C 33PF J
C404 C93-0563-05 CHIP C 18PF J C559-562 CK73HB1H102K CHIP C 1000PF K
C405,406 C93-0603-05 CHIP C 1000PF K C565-567 CK73HB1H102K CHIP C 1000PF K
C407 CK73HB1H102K CHIP C 1000PF K C568 CC73HCH1H101J CHIP C 100PF J
C408 CC73GCH1H0R5B CHIP C 0.5PF B C569 CK73HB1H102K CHIP C 1000PF K
C409 CC73GCH1H040B CHIP C 4.0PF B C570 CC73HCH1H010B CHIP C 1.0PF B
C410 C93-0563-05 CHIP C 18PF J C571 CC73HCH1H180J CHIP C 18PF J
C412 CK73HB1H102K CHIP C 1000PF K C572 CK73HB1H102K CHIP C 1000PF K
C413 C93-0552-05 CHIP C 2.0PF C C573 CC73HCH1H040B CHIP C 4.0PF B
C415 C93-0564-05 CHIP C 22PF J C574 CC73HCH1H1R5B CHIP C 1.5PF B
C416 CK73HB1H102K CHIP C 1000PF K C575 CK73HB1H102K CHIP C 1000PF K
C417 CC73GCH1H0R5B CHIP C 0.5PF B C576 CC73HCH1H180J CHIP C 18PF J
C418 CC73GCH1H040B CHIP C 4.0PF B C577 CK73HB1H102K CHIP C 1000PF K
C420 C93-0554-05 CHIP C 4.0PF C C578 CC73HCH1H390J CHIP C 39PF J
C421 C93-0563-05 CHIP C 18PF J C579 CK73HB1H102K CHIP C 1000PF K
C422 CK73HB1H102K CHIP C 1000PF K C581 CC73HCH1H330J CHIP C 33PF J
C502 CK73HB1H103K CHIP C 0.010UF K C582 CC73HCH1H010B CHIP C 1.0PF B
C503 CC73HCH1H271J CHIP C 270PF J C583 CC73HCH1H040B CHIP C 4.0PF B
C504 CC73HCH1H560J CHIP C 56PF J C584-587 CK73HB1E104K CHIP C 0.10UF K
C505 CC73HCH1H680J CHIP C 68PF J C702,703 CK73HB1A473K CHIP C 0.047UF K
C506 CC73HCH1H470J CHIP C 47PF J C713 CK73HB1H102K CHIP C 1000PF K
C507 CK73HB1H103K CHIP C 0.010UF K C718-720 CK73HB1H102K CHIP C 1000PF K
C508,509 CK73HB1A105K CHIP C 1.0UF K C722 CK73HB1H102K CHIP C 1000PF K
C510 CK73HB1H103K CHIP C 0.010UF K C724 CK73FB1A106K CHIP C 10UF K
C511 CK73FB1A106K CHIP C 10UF K C725 CK73HB1E104K CHIP C 0.10UF K
C513 CC73HCH1H331J CHIP C 330PF J C726 CK73HB1A393K CHIP C 0.039UF K K,M2,M3
C514,515 CK73HB1E104K CHIP C 0.10UF K C726 CK73HB1A683K CHIP C 0.068UF K M4
C516 CC73HCH1H331J CHIP C 330PF J C727 CK73HB1H102K CHIP C 1000PF K
C517 CK73HB1E104K CHIP C 0.10UF K C728 CK73GB0J225K CHIP C 2.2UF K
C518 CC73HCH1H101J CHIP C 100PF J C729 CK73FB1A106K CHIP C 10UF K
C519 CK73FB1A106K CHIP C 10UF K C731 CK73HB1H103K CHIP C 0.010UF K
C520 CK73HB1H102K CHIP C 1000PF K C732 CK73HB1H102K CHIP C 1000PF K K,M2,M3
C521 CK73HB1H103K CHIP C 0.010UF K C732 CK73HB1H681K CHIP C 680PF K M4
C522 CC73HCH1H270J CHIP C 27PF J C733 CK73HB1E104K CHIP C 0.10UF K
C523 CK73HB1E562K CHIP C 5600PF K C734 CK73HB1A393K CHIP C 0.039UF K M4
C524 CK73HB1E104K CHIP C 0.10UF K C734 CK73HB1C223K CHIP C 0.022UF K K,M2,M3
C525 CK73HB1A224K CHIP C 0.22UF K C735 CC73HCH1H680J CHIP C 68PF J
C527 CC73HCH1H050B CHIP C 5.0PF B C736 CK73FB1A106K CHIP C 10UF K
C528 CK73HB1H103K CHIP C 0.010UF K C737 CK73HB1H102K CHIP C 1000PF K
C530 CK73HB1E223K CHIP C 0.022UF K C738 CK73HB1E104K CHIP C 0.10UF K
C533 CC73HCH1H060B CHIP C 6.0PF B C739 CK73HB1H102K CHIP C 1000PF K
C534 CK73HB1A393K CHIP C 0.039UF K C740 CK73HB1E104K CHIP C 0.10UF K
C535 CK73HB1H102K CHIP C 1000PF K C742 CK73HB1H821K CHIP C 820PF K
C537 CC73HCH1H200J CHIP C 20PF J C743 CK73HB1H102K CHIP C 1000PF K
13
TM-281A
PARTS LIST
TX-RX UNIT (X57-8130-XX)
Ref. No. New
Address parts Parts No. Description Desti- Ref. No. New
Address parts Parts No. Description Desti-
nation nation
C744 CK73FB1A106K CHIP C 10UF K C828 CK73HB1H102K CHIP C 1000PF K
C745 CC73HCH1H390J CHIP C 39PF J C829 CK73HB1H103K CHIP C 0.010UF K
C746 CK73HB1E104K CHIP C 0.10UF K C830 CK73HB1H102K CHIP C 1000PF K
C747 CK73FB1A106K CHIP C 10UF K C831 CE32CL1C470M ELECTRO 47UF 16WV
C748 CK73HB1H102K CHIP C 1000PF K C832 CK73HB1E104K CHIP C 0.10UF K
C749 CK73HB1H103K CHIP C 0.010UF K C833-835 CK73HB1H102K CHIP C 1000PF K
C750 CC73HCH1H151J CHIP C 150PF J C836 C90-4129-05 ELECTRO 330UF 25WV
C751 CK73GB1A105K CHIP C 1.0UF K C837 CK73HB1H103K CHIP C 0.010UF K
C752 CK73HB1H392K CHIP C 3900PF K C838 CK73HB1H102K CHIP C 1000PF K
C753 CK73HB1E472K CHIP C 4700PF K C839 C90-4129-05 ELECTRO 330UF 25WV
C754 CK73FB1A106K CHIP C 10UF K C840 CK73HB1E104K CHIP C 0.10UF K
C757,758 CK73FB1A106K CHIP C 10UF K C844 CK73HB1H102K CHIP C 1000PF K
C761 CK73HB1E104K CHIP C 0.10UF K C847 CK73HB1H102K CHIP C 1000PF K
C763 CC73HCH1H030B CHIP C 3.0PF B C848-851 CK73FB1A106K CHIP C 10UF K
C764 CC73HCH1H050B CHIP C 5.0PF B C853,854 CK73FB0J226M CHIP C 22UF M
C765 CK73HB1H102K CHIP C 1000PF K C901-903 CK73HB1A104K CHIP C 0.10UF K
C766 CC73HCH1H050B CHIP C 5.0PF B C910 CK73HB1H102K CHIP C 1000PF K
C767 CC73HCH1H030B CHIP C 3.0PF B C912 CK73HB1H102K CHIP C 1000PF K
C768 CK73HB1E104K CHIP C 0.10UF K C915 CC73HCH1H101J CHIP C 100PF J
C769 CK73HB1H102K CHIP C 1000PF K C916-918 CK73HB1H102K CHIP C 1000PF K
C771 CK73HB1H102K CHIP C 1000PF K C920 CK73HB1H471K CHIP C 470PF K
C772 CK73HB1E104K CHIP C 0.10UF K C921 CK73GB1A105K CHIP C 1.0UF K
C774 CK73HB1H182K CHIP C 1800PF K C922 CK73HB1H102K CHIP C 1000PF K
C775 CK73HB1H392K CHIP C 3900PF K C924 CK73HB1A104K CHIP C 0.10UF K
C776 CK73HB1H102K CHIP C 1000PF K C926,927 CC73HCH1H101J CHIP C 100PF J
C777 CK73HB1A474K CHIP C 0.47UF K C928 CK73HB1H681K CHIP C 680PF K
C778 CK73GB1A105K CHIP C 1.0UF K C929 CK73HB1H102K CHIP C 1000PF K
C779 CK73HB1E104K CHIP C 0.10UF K TC1 C05-0245-05 CERAMIC TRIMMER CAPACITOR (10PF)
C781 CK73HB1H102K CHIP C 1000PF K TC2 C05-0399-05 CERAMIC TRIMMER CAPACITOR (6PF)
C782 CK73HB1E104K CHIP C 0.10UF K
CN501 E23-1325-05 TERMINAL
C783 CK73GB1A105K CHIP C 1.0UF K CN702 ✽ E40-6898-05 FLAT CABLE CONNECTOR (22P)
C784,785 CK73HB1H103K CHIP C 0.010UF K CN901 ✽ E40-6897-05 FLAT CABLE CONNECTOR (22P)
C786 CK73HB1A393K CHIP C 0.039UF K J701 2B E11-0425-05 3.5D PHONE JACK (EXT SP)
C787 CK73HB1E103K CHIP C 0.010UF K J901 E58-0535-05 MODULAR JACK (MIC)
C788 CK73HB1H103K CHIP C 0.010UF K
F701 F53-0327-15 FUSE (4A)
C789,790 CK73HB1C333K CHIP C 0.033UF K
C793 CK73HB1C183K CHIP C 0.018UF K CD501 L79-1914-05 TUNING COIL
C794 CK73HB1C822K CHIP C 8200PF K CF501 L72-1034-05 CERAMIC FILTER (450KHZ/WIDE)
C795 CK73HB1A224K CHIP C 0.22UF K CF502 L72-0999-05 CERAMIC FILTER (450KHZ/NARROW)
C796 CK73HB1H122K CHIP C 1200PF K L1 ✽ L92-0622-15 CHIP FERRITE
L2 L41-1005-08 SMALL FIXED INDUCTOR (10UH)
C797 CC73HCH1H390J CHIP C 39PF J
C798 CK73HB1A224K CHIP C 0.22UF K L3 ✽ L92-0621-15 CHIP FERRITE
C799 CK73GB0J475K CHIP C 4.7UF K L5 ✽ L92-0620-15 CHIP FERRITE
C800,801 CK73HB1H102K CHIP C 1000PF K L6-9 L40-2785-92 SMALL FIXED INDUCTOR (270NH)
C802 CK73FB1A106K CHIP C 10UF K L10 ✽ L92-0622-15 CHIP FERRITE
L11 L41-4778-14 SMALL FIXED INDUCTOR (47NH)
C804 CK73HB1H103K CHIP C 0.010UF K
C805 CK73HB1H102K CHIP C 1000PF K L12 L41-3378-14 SMALL FIXED INDUCTOR (33NH)
C806,807 CK73FB1A106K CHIP C 10UF K L13-16 L40-2702-86 SMALL FIXED INDUCTOR (27UH)
C808,809 CK73GB1A105K CHIP C 1.0UF K L17 ✽ L92-0622-15 CHIP FERRITE
C810,811 CK73HB1E104K CHIP C 0.10UF K L18 L40-3375-71 SMALL FIXED INDUCTOR (33NH)
L19 ✽ L92-0622-15 CHIP FERRITE
C814 CK73FB1A106K CHIP C 10UF K
C815 CK73HB1E104K CHIP C 0.10UF K L20 L40-1085-71 SMALL FIXED INDUCTOR (100NH)
C816 CK73HB1A224K CHIP C 0.22UF K L21 L40-3975-71 SMALL FIXED INDUCTOR (39NH)
C817 CK73HB1H102K CHIP C 1000PF K L302 L40-2275-71 SMALL FIXED INDUCTOR (22NH)
C818 CK73FB0J226M CHIP C 22UF M L305 L40-1075-71 SMALL FIXED INDUCTOR (10NH)
L308 L40-8265-92 SMALL FIXED INDUCTOR (8.2NH)
C820-823 CK73HB1H102K CHIP C 1000PF K
C824 CK73HB1E104K CHIP C 0.10UF K L309 L40-1285-92 SMALL FIXED INDUCTOR (120NH)
C825 CK73FB0J226M CHIP C 22UF M L310 L40-4775-92 SMALL FIXED INDUCTOR (47NH)
C826 CK73HB1H102K CHIP C 1000PF K L312-314 L92-0179-05 CHIP FERRITE
C827 CK73FB1E475K CHIP C 4.7UF K L315,316 L34-4902-05 AIR-CORE COIL (9.5T)
14
TM-281A
PARTS LIST
TX-RX UNIT (X57-8130-XX)
Ref. No. New
Address parts Parts No. Description Desti- Ref. No. New
Address parts Parts No. Description Desti-
nation nation
L317 L34-1039-05 AIR-CORE COIL (1.5T) R336 RK73HB1J470J CHIP R 47 J 1/16W
L318-320 L34-4903-05 AIR-CORE COIL (5T) R337 RK73HB1J101J CHIP R 100 J 1/16W
L502-504 L40-3381-86 SMALL FIXED INDUCTOR (0.33UH) R338 RK73HB1J154J CHIP R 150K J 1/16W
L505 L40-3391-86 SMALL FIXED INDUCTOR (3.3UH) R339 RK73HB1J103J CHIP R 10K J 1/16W
L506,507 L41-3988-14 SMALL FIXED INDUCTOR (390NH) R340 RK73HB1J223J CHIP R 22K J 1/16W
L508 L40-4775-71 SMALL FIXED INDUCTOR (47NH) R341 RK73HB1J154J CHIP R 150K J 1/16W
L510,511 L41-6878-14 SMALL FIXED INDUCTOR (68NH) R342 RK73HB1J152J CHIP R 1.5K J 1/16W
L512 L41-3385-14 SMALL FIXED INDUCTOR (330NH) R344,345 RK73HB1J104J CHIP R 100K J 1/16W
L514,515 L41-6878-14 SMALL FIXED INDUCTOR (68NH) R346 RK73EB2E221J CHIP R 220 J 1/4W
L701,702 ✽ L92-0622-15 CHIP FERRITE R347 RK73HB1J152J CHIP R 1.5K J 1/16W
L901 ✽ L92-0621-15 CHIP FERRITE R348 RK73HB1J153J CHIP R 15K J 1/16W
X1 L77-1944-05 TCXO (16.8MHZ) R349 RK73EB2E221J CHIP R 220 J 1/4W
X701 ✽ L78-1427-05 RESONATOR (8.00MHZ) R350 RK73HB1J100J CHIP R 10 J 1/16W
XF501 L71-0655-05 MCF (49.95MHZ) R351 RK73HB1J473J CHIP R 47K J 1/16W
R377,378 RK73HB1J103J CHIP R 10K J 1/16W
CP901 RK75GB1J102J CHIP-COM 1.0K J 1/16W
R1 RK73HB1J104J CHIP R 100K J 1/16W R380 2B R92-1061-05 JUMPER REST 0 OHM
R2-4 RK73HB1J102J CHIP R 1.0K J 1/16W R501 RK73HB1J124J CHIP R 120K J 1/16W
R5 RK73HB1J103J CHIP R 10K J 1/16W R502 RK73HB1J101J CHIP R 100 J 1/16W
R6 RK73HB1J152J CHIP R 1.5K J 1/16W R503 RK73HB1J682J CHIP R 6.8K J 1/16W
R504-507 RK73HB1J103J CHIP R 10K J 1/16W
R7 RK73HB1J100J CHIP R 10 J 1/16W
R8 RK73HB1J104J CHIP R 100K J 1/16W R508 RK73HB1J682J CHIP R 6.8K J 1/16W
R9 RK73HB1J471J CHIP R 470 J 1/16W R509 RK73HB1J000J CHIP R 0.0 J 1/16W
R10 RK73HB1J822J CHIP R 8.2K J 1/16W R510 RK73HB1J102J CHIP R 1.0K J 1/16W
R11 RK73HB1J103J CHIP R 10K J 1/16W R511 RK73HB1J223J CHIP R 22K J 1/16W
R512 RK73HB1J564J CHIP R 560K J 1/16W
R12 RK73HB1J562J CHIP R 5.6K J 1/16W
R13 RK73HB1J103J CHIP R 10K J 1/16W R514,515 RK73HB1J472J CHIP R 4.7K J 1/16W
R15 RK73HB1J102J CHIP R 1.0K J 1/16W R517 RK73HB1J182J CHIP R 1.8K J 1/16W
R16 RK73HB1J000J CHIP R 0.0 J 1/16W R519 RK73HB1J103J CHIP R 10K J 1/16W
R17 RK73HB1J471J CHIP R 470 J 1/16W R520 RK73HB1J474J CHIP R 470K J 1/16W
R521 RK73HB1J102J CHIP R 1.0K J 1/16W
R18 RK73HB1J000J CHIP R 0.0 J 1/16W
R19 RK73HB1J272J CHIP R 2.7K J 1/16W R522 RK73HB1J101J CHIP R 100 J 1/16W
R20 RK73HB1J102J CHIP R 1.0K J 1/16W R523 RK73HB1J000J CHIP R 0.0 J 1/16W
R21 RK73HB1J152J CHIP R 1.5K J 1/16W R524 RK73HB1J394J CHIP R 390K J 1/16W
R22 RK73HB1J223J CHIP R 22K J 1/16W R525 RK73HB1J271J CHIP R 270 J 1/16W
R526 RK73HB1J000J CHIP R 0.0 J 1/16W
R23 RK73HB1J103J CHIP R 10K J 1/16W
R24 RK73HB1J104J CHIP R 100K J 1/16W R527 RK73HB1J474J CHIP R 470K J 1/16W
R25-27 RK73HB1J473J CHIP R 47K J 1/16W R528 RK73HB1J102J CHIP R 1.0K J 1/16W
R28 RK73HB1J221J CHIP R 220 J 1/16W R529 RK73HB1J394J CHIP R 390K J 1/16W
R29 RK73HB1J471J CHIP R 470 J 1/16W R531 RK73HB1J101J CHIP R 100 J 1/16W
R532 RK73HB1J000J CHIP R 0.0 J 1/16W
R30 RK73HB1J104J CHIP R 100K J 1/16W
R31 RK73HB1J472J CHIP R 4.7K J 1/16W R534 RK73HB1J221J CHIP R 220 J 1/16W
R32 RK73HB1J221J CHIP R 220 J 1/16W R535 RK73HB1J000J CHIP R 0.0 J 1/16W
R33 RK73HB1J101J CHIP R 100 J 1/16W R536 RK73HB1J561J CHIP R 560 J 1/16W
R34 RK73HB1J102J CHIP R 1.0K J 1/16W R537 RK73HB1J474J CHIP R 470K J 1/16W
R538 RK73HB1J224J CHIP R 220K J 1/16W
R35 RK73HB1J124J CHIP R 120K J 1/16W
R37 RK73HB1J000J CHIP R 0.0 J 1/16W R539 RK73HB1J181J CHIP R 180 J 1/16W
R38 RK73HB1J101J CHIP R 100 J 1/16W R540 RK73HB1J473J CHIP R 47K J 1/16W
R40 RK73HB1J102J CHIP R 1.0K J 1/16W R541 RK73HB1J333J CHIP R 33K J 1/16W
R41 RK73HB1J103J CHIP R 10K J 1/16W R542 RK73HB1J000J CHIP R 0.0 J 1/16W
R543,544 RK73HB1J104J CHIP R 100K J 1/16W
R42 RK73HB1J822J CHIP R 8.2K J 1/16W
R43-45 RK73HB1J101J CHIP R 100 J 1/16W R545 RK73HB1J102J CHIP R 1.0K J 1/16W
R46 RK73HB1J222J CHIP R 2.2K J 1/16W R546 RK73HB1J101J CHIP R 100 J 1/16W
R304 RK73HB1J102J CHIP R 1.0K J 1/16W R547 RK73HB1J000J CHIP R 0.0 J 1/16W
R307 RK73HB1J000J CHIP R 0.0 J 1/16W R549 RK73HB1J151J CHIP R 150 J 1/16W
R550 RK73HB1J103J CHIP R 10K J 1/16W
R312 RK73HB1J472J CHIP R 4.7K J 1/16W
R314 RK73HB1J223J CHIP R 22K J 1/16W R551 RK73HB1J104J CHIP R 100K J 1/16W
R326 RK73HB1J123J CHIP R 12K J 1/16W R552 RK73HB1J473J CHIP R 47K J 1/16W
R331,332 RK73HB1J100J CHIP R 10 J 1/16W R553 RK73HB1J273J CHIP R 27K J 1/16W
R333,334 RK73HB1J101J CHIP R 100 J 1/16W R554,555 RK73HB1J104J CHIP R 100K J 1/16W
R556 RK73FB2B000J CHIP R 0.0 J 1/8W
15
TM-281A
PARTS LIST
TX-RX UNIT (X57-8130-XX)
Ref. No. New
Address parts Parts No. Description Desti- Ref. No. New
Address parts Parts No. Description Desti-
nation nation
R557 RK73HB1J104J CHIP R 100K J 1/16W R771 RK73HB1J473J CHIP R 47K J 1/16W
R558 RK73HB1J473J CHIP R 47K J 1/16W R772 RK73HB1J103J CHIP R 10K J 1/16W
R559 RK73HB1J273J CHIP R 27K J 1/16W R773 RK73HB1J000J CHIP R 0.0 J 1/16W
R560 RK73HB1J000J CHIP R 0.0 J 1/16W R774 RK73HB1J472J CHIP R 4.7K J 1/16W
R701 RK73HB1J000J CHIP R 0.0 J 1/16W R775 RK73HB1J102J CHIP R 1.0K J 1/16W
R702,703 RK73HB1J101J CHIP R 100 J 1/16W R776 RK73HB1J152J CHIP R 1.5K J 1/16W
R704,705 RK73HB1J102J CHIP R 1.0K J 1/16W R777,778 RK73HB1J103J CHIP R 10K J 1/16W
R706 RK73HB1J000J CHIP R 0.0 J 1/16W R779-781 RK73HB1J473J CHIP R 47K J 1/16W
R707 RK73HB1J102J CHIP R 1.0K J 1/16W R782 RK73HB1J102J CHIP R 1.0K J 1/16W
R708 RK73HB1J000J CHIP R 0.0 J 1/16W R783 RK73HB1J393J CHIP R 39K J 1/16W
R710,711 RK73GH2A153D CHIP R 15K D 1/10W R784 RK73HB1J153J CHIP R 15K J 1/16W
R713 RK73HB1J821J CHIP R 820 J 1/16W R785 RK73HB1J123J CHIP R 12K J 1/16W
R714 RK73HB1J104J CHIP R 100K J 1/16W R786 RK73HB1J154J CHIP R 150K J 1/16W
R715 RK73HB1J681J CHIP R 680 J 1/16W R787 RK73HB1J124J CHIP R 120K J 1/16W
R716 RK73HB1J101J CHIP R 100 J 1/16W R789 RK73HB1J224J CHIP R 220K J 1/16W
R717 RK73HB1J103J CHIP R 10K J 1/16W M4 R790 RK73HB1J123J CHIP R 12K J 1/16W
R717 RK73HB1J183J CHIP R 18K J 1/16W K,M2,M3 R791 RK73GH2A124D CHIP R 120K D 1/10W
R718 RK73HB1J152J CHIP R 1.5K J 1/16W R792 RK73GH2A562D CHIP R 5.6K D 1/10W
R719 RK73HB1J122J CHIP R 1.2K J 1/16W R793 RK73GH2A913D CHIP R 91K D 1/10W
R721 RK73HB1J105J CHIP R 1.0M J 1/16W M4 R794 RK73HB1J124J CHIP R 120K J 1/16W
R721 RK73HB1J754J CHIP R 750K J 1/16W K,M2,M3 R795 RK73GH2A562D CHIP R 5.6K D 1/10W
R722 RK73HB1J152J CHIP R 1.5K J 1/16W R796 RK73HB1J183J CHIP R 18K J 1/16W
R723 RK73HB1J912J CHIP R 9.1K J 1/16W R797 RK73HB1J272J CHIP R 2.7K J 1/16W
R724 RK73HB1J682J CHIP R 6.8K J 1/16W R799 RK73HB1J474J CHIP R 470K J 1/16W
R725 ✽ RK73HB1J244J CHIP R 240K J 1/16W R800 RK73HB1J562J CHIP R 5.6K J 1/16W
R726 RK73HB1J183J CHIP R 18K J 1/16W R801 RK73HB1J000J CHIP R 0.0 J 1/16W
R727 RK73HB1J334J CHIP R 330K J 1/16W R802 RK73HB1J473J CHIP R 47K J 1/16W
R728 RK73HB1J823J CHIP R 82K J 1/16W R803 RK73HB1J392J CHIP R 3.9K J 1/16W
R729 RK73HB1J124J CHIP R 120K J 1/16W R804 RK73HB1J123J CHIP R 12K J 1/16W
R730 RK73HB1J823J CHIP R 82K J 1/16W R805 RK73HB1J562J CHIP R 5.6K J 1/16W
R733 RK73HB1J684J CHIP R 680K J 1/16W R806 RK73HB1J272J CHIP R 2.7K J 1/16W
R734 RK73HB1J224J CHIP R 220K J 1/16W R807 RK73HB1J105J CHIP R 1.0M J 1/16W
R735 RK73HB1J274J CHIP R 270K J 1/16W R808 RK73HB1J153J CHIP R 15K J 1/16W
R736,737 RK73HB1J103J CHIP R 10K J 1/16W R809 RK73HB1J471J CHIP R 470 J 1/16W
R738 RK73HB1J683J CHIP R 68K J 1/16W R810 RK73HB1J153J CHIP R 15K J 1/16W
R739 RK73HB1J223J CHIP R 22K J 1/16W R811 RK73HB1J000J CHIP R 0.0 J 1/16W
R740 RK73HB1J683J CHIP R 68K J 1/16W R812 RK73HB1J222J CHIP R 2.2K J 1/16W
R741 RK73HB1J154J CHIP R 150K J 1/16W R813 RK73HB1J473J CHIP R 47K J 1/16W
R742 RK73HB1J124J CHIP R 120K J 1/16W R814 RK73HB1J152J CHIP R 1.5K J 1/16W
R743-745 RK73HB1J102J CHIP R 1.0K J 1/16W R815 RK73HB1J472J CHIP R 4.7K J 1/16W
R746 RK73HB1J823J CHIP R 82K J 1/16W R816,817 RK73HB1J473J CHIP R 47K J 1/16W
R747 RK73HB1J104J CHIP R 100K J 1/16W R818 RK73HB1J683J CHIP R 68K J 1/16W
R748 RK73HB1J223J CHIP R 22K J 1/16W R819 RK73HB1J123J CHIP R 12K J 1/16W
R749 RK73HB1J562J CHIP R 5.6K J 1/16W R820 RK73HB1J221J CHIP R 220 J 1/16W
R750,751 RK73HB1J102J CHIP R 1.0K J 1/16W R821 RK73HB1J473J CHIP R 47K J 1/16W
R752-755 RK73HB1J473J CHIP R 47K J 1/16W R822 RK73HB1J334J CHIP R 330K J 1/16W
R756 RK73HB1J103J CHIP R 10K J 1/16W R823 RK73HB1J391J CHIP R 390 J 1/16W
R757 RK73HB1J473J CHIP R 47K J 1/16W R824 RK73HB1J474J CHIP R 470K J 1/16W
R758 RK73HB1J000J CHIP R 0.0 J 1/16W R825 RK73HB1J394J CHIP R 390K J 1/16W
R759 RK73HB1J102J CHIP R 1.0K J 1/16W R826 RK73HB1J473J CHIP R 47K J 1/16W
R760,761 RK73HB1J473J CHIP R 47K J 1/16W R827 RK73HB1J334J CHIP R 330K J 1/16W
R762 RK73HB1J103J CHIP R 10K J 1/16W R828,829 RK73HB1J000J CHIP R 0.0 J 1/16W
R763 RK73HB1J000J CHIP R 0.0 J 1/16W R830-833 RK73FB2B000J CHIP R 0.0 J 1/8W
R764 RK73GB2A000J CHIP R 0.0 J 1/10W R834 RK73HB1J102J CHIP R 1.0K J 1/16W
R765 RK73HB1J102J CHIP R 1.0K J 1/16W R835 RK73HB1J000J CHIP R 0.0 J 1/16W K
R766-768 RK73GB2A000J CHIP R 0.0 J 1/10W K R836 RK73HB1J000J CHIP R 0.0 J 1/16W M2
R767,768 RK73GB2A000J CHIP R 0.0 J 1/10W M4 R837 RK73HB1J000J CHIP R 0.0 J 1/16W M3
R768 RK73GB2A000J CHIP R 0.0 J 1/10W M3 R838 RK73HB1J000J CHIP R 0.0 J 1/16W M4
R769 RK73HB1J102J CHIP R 1.0K J 1/16W R841,842 RK73HB1J103J CHIP R 10K J 1/16W
R770 RK73HB1J000J CHIP R 0.0 J 1/16W R843 RK73HB1J473J CHIP R 47K J 1/16W
16
TM-281A
PARTS LIST
TX-RX UNIT (X57-8130-XX)
Ref. No. New
Address parts Parts No. Description Desti- Ref. No. New
Address parts Parts No. Description Desti-
nation nation
R844 RK73HB1J103J CHIP R 10K J 1/16W IC710 XC6209B502P-G MOS-IC
R901 RK73HB1J000J CHIP R 0.0 J 1/16W IC711 ✽ TA7808F-NQ ANALOGUE IC
R902,903 RK73HB1J472J CHIP R 4.7K J 1/16W IC712 XC61CN4002MR MOS-IC
R904-906 RK73HB1J000J CHIP R 0.0 J 1/16W IC713 TA7805F-NQ MOS-IC
R908 RK73HB1J101J CHIP R 100 J 1/16W IC714 ✽ XC61CN3202MR MOS-IC
R909 RK73HB1J102J CHIP R 1.0K J 1/16W IC715 1A LA4600 BI-POLAR IC
R910-912 RK73HB1J103J CHIP R 10K J 1/16W IC901 PT6554LQ MOS-IC
R913 RK73HB1J563J CHIP R 56K J 1/16W Q1 2SA1832(GR)F TRANSISTOR
R914 RK73HB1J102J CHIP R 1.0K J 1/16W Q2 2SC4738(GR)F TRANSISTOR
R915 RK73HB1J152J CHIP R 1.5K J 1/16W Q3 2SC4649(N,P) TRANSISTOR
R916 RK73HB1J183J CHIP R 18K J 1/16W Q4 MCH3914(7)-H FET
R917 RK73HB1J392J CHIP R 3.9K J 1/16W Q5 2SJ347F FET
R918 RK73HB1J821J CHIP R 820 J 1/16W Q6 MCH3914(7)-H FET
R919 RK73HB1J272J CHIP R 2.7K J 1/16W Q7 UMC4N TRANSISTOR
R920 RK73HB1J183J CHIP R 18K J 1/16W Q8 KTC4075E(Y,GR) TRANSISTOR
R921 RK73HB1J104J CHIP R 100K J 1/16W Q9,10 2SC5108(Y)F TRANSISTOR
R922-924 RK73HB1J331J CHIP R 330 J 1/16W Q303 RD00HVS1-T113 FET
VR901 R31-0662-05 VARIABLE RESISTOR Q501 KTC4080E-P TRANSISTOR
Q502 2SC4617(S) TRANSISTOR
D1 HZU5ALL DIODE Q503 KTC4080E-P TRANSISTOR
D2 DA2S101 DIODE
D3-6 ✽ HVC359 VARIABLE CAPACITANCE DIODE Q504 3SK318 FET
D7 1SV278F VARIABLE CAPACITANCE DIODE Q505 3SK294-FP FET
D8 DA2S101 DIODE Q506 2SK1830F FET
Q701-703 2SC4919-S TRANSISTOR
D9,10 HSC277 DIODE Q704,705 2SK3019 FET
D301 UDZW5.1(B) ZENER DIODE
D305 DA2S101 DIODE Q706 2SC2412K TRANSISTOR
D306,307 L407CDB DIODE (50V/1W) Q707-709 RT1N141U-T111 TRANSISTOR
D309 ✽ JDP2S12CR DIODE Q710,711 2SB1694 TRANSISTOR
Q712 DTC363EU DIGITAL TRANSISTOR
D311 ✽ JDP2S12CR DIODE Q713 RT1N141U-T111 TRANSISTOR
D312 RB521S-30 DIODE
D313,314 HSB88AS-E DIODE Q714 2SJ645 FET
D316 RB521S-30 DIODE Q715 RT1N141U-T111 TRANSISTOR
D501,502 MC2858-T111 DIODE Q901 RT1P141U-T111 TRANSISTOR
Q902 RT1N141U-T111 TRANSISTOR
D503 HSB88AS-E DIODE Q903 2SB1132(Q,R) TRANSISTOR
D504 DA2S101 DIODE
D505,506 1SV325F VARIABLE CAPACITANCE DIODE Q904 UMG3N TRANSISTOR
D508,509 1SV325F VARIABLE CAPACITANCE DIODE TH501 NCP18WM474J0S THERMISTOR
D702 MC2850 DIODE TH702,703 NCP18WF104J03 THERMISTOR
D704-706 MC2850 DIODE S901 W02-3704-05 ENCODER
D708 DA2S101 DIODE
D709 1SS372F DIODE
D710 DA2S101 DIODE
D711 1SS372F DIODE
D712 UDZW18(B) ZENER DIODE
D714 Z5W27V SURGE ABSORBER
D901 1SS355 DIODE
D902 UDZW6.2(B) ZENER DIODE
IC1 MB15A02PFV2E1 MOS-IC
IC2 UPB1509GV BI-POLAR IC
IC302 1B ✽ RA60H1317M231 MOS-IC (POWER MODULE)
IC303 NJM12904RB1 MOS-IC
IC501 UA31136L MOS-IC
IC703 NJM2100V-ZB MOS-IC
IC704 NJM12904RB1 MOS-IC
IC705 M62363FP-F MOS-IC
IC706 BA10324AFV MOS-IC
IC707 30622MEP540GU MICROCONTROLLER IC
IC708 EX24064ASAS0A ROM IC
IC709 BA10324AFV MOS-IC
If a part reference number is listed in a shaded box, that part does not come with the PCB. 17
TM-281A
EXPLODED VIEW
A B
A
1
A : N35-2604-43
B : N67-3008-48
C : N80-2008-48
D : N87-2608-48
1
A
B IC302
B
IC715 B
D Dx2
TX-RX unit (A/2)
Dx2
TX-RX section 11
D
15 Dx4 R380
X57 A/2
D
X57 A/2
J701
B 700
13
2
D
10
TX-RX unit (B/2)
Display section 19
C
2
19
5 12
27 6 C 702
20
30
16 703
3
31
36
3
32
Parts with the exploded numbers larger than 700 are not supplied.
18 If a part reference number is listed in a box on the exploded view of the PCB, that part does not come with the PCB.
These parts must be ordered separately.
TM-281A
PACKING
C D
713 Protection bag
K,M3,M4 M2
22 Packing fixture
1 37 Microphone (H12-4330-02)
(T91-0624-65): M2
(T91-0641-75): K,M3,M4
710 Protection bag
18 Fuse (Blade type) 15A 23 Packing fixture
(F52-0024-05) (H12-4331-02)
26 Holder (MIC)
14 DC cord (J19-1584-15)
(E30-7744-05)
34 Screw set
(N99-2082-05)
24 Item carton case
28 Bracket (H52-2503-02): K
(J29-0726-03)
711 Pamphlet
712 Warranty card: K
7 Instruction manual
(B62-2347-10): K,M2
(B62-2348-10): M3
(B62-2349-10): M4
Parts with the exploded numbers larger than 700 are not supplied. 19
TM-281A
ADJUSTMENT
Measuring Equipment for Alignment Preparation
1. Digital voltmeter (DVM) • Set the controls and switches to the positions listed be-
Input impedance: High low unless otherwise specified.
Volume control : Fully counterclockwise
2. RF voltmeter (RF VM) Power switch : OFF
Input impedance: 1MΩ or more, 2pF or less
Voltage range: Full scale=10mV to 300V
Measurable frequency range: Up to 200MHz 2 CM
> HOOK
3. Frequency counter (f.counter) B MIC
Input sensitivity: About 50mV = ME
Frequency range: 10Hz to 1000MHz ; PTT
. GND
4. DC power supply @ 8C
Voltage: Variable in the range 9 to 17V : MBL
Current: 14A or more
Microphone socket
5. Power meter
(as viewed from the front of the transceiver)
Measurement power: 65W, 25W
Impedance: 50Ω
• To protect the signal generator, never connect the micro-
Measurable frequency: Up to 200MHz
phone to the microphone socket when the receiver sec-
6. AF voltmeter (AF VM) tion is adjusted.
Input impedance: 1MΩ or more • Before the power cord is connected, make sure the pow-
Voltage range: Full scale=1mV to 30V er switch is off.
Measurable frequency range: 50Hz to 10kHz • Without specification of SSG, standard modulation is ap-
plied (MOD: 1kHz, DEV: ±3kHz)
7. AF generator (AG)
Output frequency: 100Hz to 10kHz
Output voltage: 0.5mV to 1V
8. Linear detector
Measurable frequency: Up to 200MHz
9. Spectrum analyzer
Measuring range: 10kHz to 1GHz or more
10. Oscilloscope
High sensitivity with horizontal input terminal
11. Standard signal generator (SSG)
Frequency range: 136 to 174MHz
Output: –133dBm (0.05µV) to greater than –13dBm
(50mV)
12. Dummy load (for AF)
8Ω, about 5W
13. Sweep generator
The sweep generator must be able to sweep the fre-
quency range of 30 to 300MHz.
14. Tracking generator
Output voltage: 100mV or more
20
TM-281A
ADJUSTMENT
Adjustment Mode ■ Panel Key Operation Method in Adjustment Mode
This mode is used to replace or readjust the EEPROM (IC708). : @
In Adjustment Mode, the transceiver can be adjusted us-
ing its panel keys.
■ Items that can be adjusted in Adjustment Mode
1. Frequency Tune 8. DTMF Fine Deviation
2. Transmit High Power *1 9. Band Pass Tuning *3
3. Transmit Low Power *1 10. Squelch Tight *4
4. DCS Balance *2 11. Squelch Open *4 . ; = B >
5. Max Deviation *2 12. S-Meter S1 Level
6. CTCSS Fine Deviation *2 13. S-Meter Full Level
q Power switch/Volume control
7. DCS Fine Deviation *2
w When the Tuning control is pressed once, the adjustment
value display blinks. (Select an adjustment item with the
Note: [VFO] or [MR] key before performing the operation. It
*1: Adjusted in 5 points in the transmission operating fre- cannot be performed while transmitting.)
quency range. When the Tuning control is rotated while the adjustment
*2: Adjusted in 3 points for the Wide bandwidth in the display is blinking, the adjustment value changes. (Adjust
transmission operating frequency range. transmission items while transmitting.)
Adjusted in 1 point for the Narrow bandwidth. When the Tuning control is pressed again, the adjustment
*3: Adjusted in 3 points in the reception operating frequen- value stops blinking and lights, and the adjustment value
cy range. is saved in the memory of the transceiver. (For transmis-
*4: Adjusted in 3 points for the Wide bandwidth in the re- sion item adjustment, enter receive mode before per-
ception operating frequency range. forming the operation.)
Adjusted in 1 point for the Narrow bandwidth. e Changing between adjustment value display and frequen-
cy display
■ How to Enter Adjustment Mode The display changes as follows: Adjustment value display
To perform adjustments with the transceiver panel keys, → Transmit frequency display → Receive frequency dis-
the transceiver must be set to “Adjustment Mode”. play → Adjustment value display.
While shorting two lands (GND, ADJ) on the component The frequency for adjustment can be confirmed.
side of the TX-RX unit (A/2) using a pair of tweezers or simi- r Moves the adjustment item backward. (If it is operated
lar tool, turn the transceiver power ON to enter Adjustment when a frequency is displayed, the adjustment item dis-
Mode. play returns.)
t Moves the adjustment item forward. (If it is operated
when a frequency is displayed, the adjustment item dis-
play returns.)
y If it is pressed before determining the adjustment value,
the adjustment value of the Adjustment item returns to
TX-RX UNIT (X57-8130-XX) (A/2) its original value.
: TX-RX section u Not used in Adjustment Mode.
Component side view
Note:
GND ADJ If Max Power for transmission is low, check the DC cable.
Short these two lands If the DC cable connector has poor contact due to rust or
stain, a voltage drop may occur frequently and correct trans-
mission power may not be supplied.
In this case, polish the DC cable connector. If the problem
■ LCD Display in Adjustment Mode still persists, replace the DC cable with a new one.
Example of Frequency Tune. See “Table 1” for an LCD
display list.
The value stored in the EEPROM (00~FF)
Blink in adjustment mode
Adjustment item Current adjustment value (00~FF)
21
TM-281A
ADJUSTMENT
Adjustment Transmit Receive
No. Adjustment Item Display Note Signaling
Frequency Point (MHz) (MHz)
1 Frequency Tune Center 155.100 155.050
Low 136.100 136.050
Low’ 142.100 142.050
2 TX High Power Center “H” icon appear 150.100 150.050
High’ 156.100 156.050
High 173.900 173.950
Low 136.100 136.050
Low’ 142.100 142.050
3 TX Low Power Center “L” icon appear 150.100 150.050
High’ 156.100 156.050
High 173.900 173.950
Low 136.100 136.050
4 DCS Balance Center “DCS” icon appear 155.100 155.050
DCS : 023N
High 173.900 173.950
5 DCS Balance (Narrow) Center “DCS” and “N” icon appear 155.100 155.050
Low 136.100 136.050
6 Max Deviation Center 155.100 155.050
High 173.900 173.950
7 Max Deviation (Narrow) Center “N” icon appear 155.100 155.050
Low 136.100 136.050
8 CTCSS Fine Deviation Center “CT” icon appear 155.100 155.050
CTCSS : 88.5Hz
High 173.900 173.950
9 CTCSS Fine Deviation (Narrow) Center “CT” and “N” icon appear 155.100 155.050
Low 136.100 136.050
10 DCS Fine Deviation Center “DCS” icon appear 155.100 155.050
DCS : 023N
High 173.900 173.950
11 DCS Fine Deviation (Narrow) Center “DCS” and “N” icons appear 155.100 155.050
12 DTMF Fine Deviation Center 155.100 155.050
DTMF : 9
13 DTMF Fine Deviation (Narrow) Center “N” icon appear 155.100 155.050
Low 136.100 136.050
14 Band Pass Tuning Center “BUSY” icon appear 155.100 155.050
High 173.900 173.950
Low 136.100 136.050
15 Squelch Tight Center 146.100 146.050
High 173.900 173.950
16 Squelch Tight (Narrow) Center “N” icon appear 146.100 146.050
Low 136.100 136.050
17 Squelch Open Center 146.100 146.050
High 173.900 173.950
18 Squelch Open (Narrow) Center “N” icon appear 146.100 146.050
19 S-Meter S1 Level Center 146.100 146.050
20 S-Meter Full Level Center 146.100 146.050
Table 1 Adjustment items, display and test frequency list
22
TM-281A
ADJUSTMENT
Adjustment Points Mkr1 136.1 MHz
Ref –10 dBm Atten 5 dB –24.78 dBm
Peak
ANT Log
10 1
dB/
FB +B
GND
Center
TX-RX UNIT (X57-8130-XX) (A/2) 136.0500000 MHz
: TX-RX section
Component side
W1 S2
GND ADJ CV S3 FC
AA
GND BPF
Center 136.1 MHz Span 200 MHz
#Res BW 100 kHz VBW 100 kHz Sweep 50 ms (401 pts)
J701
EXT. SP
Fig. 1
Mkr1 155.1 MHz
Ref –10 dBm Atten 5 dB –21.89 dBm
TX-RX UNIT (X57-8130-XX) (A/2) Peak
: TX-RX section Log
Foil side 10 1
dB/
TC1 TC2
CV
Center
155.0500000 MHz
W1 S2
S3 FC
AA
Center 155.1 MHz Span 200 MHz
#Res BW 100 kHz VBW 100 kHz Sweep 50 ms (401 pts)
Fig. 2
Mkr1 174.0 MHz
Ref –10 dBm Atten 5 dB –23.85 dBm
Peak
Log
10 1
dB/
Center
173.9500000 MHz
W1 S2
S3 FC
AA
Center 173.9 MHz Span 200 MHz
#Res BW 100 kHz VBW 100 kHz Sweep 50 ms (401 pts)
Fig. 3
23
TM-281A
ADJUSTMENT
Common Section
Measurement Adjustment
Item Condition Test- Specifications / Remarks
Unit Terminal Unit Parts Method
equipment
1. Setting 1) Power supply voltage
DC power supply terminal
: 13.8V
2. All LCD 1) All LCD segments light check Confirm that all LCD segments light.
segments Turn the transceiver power ON by pressing the power switch while [F] key is
light check pressed. While the [F] key is pressed, all LCD segments light.
and full reset 2) Full reset
After confirming that all LCD segments have lighted described in the step 1
above, release the [F] key, “FL.RST?” appears on the display.
Press the [F] key, “SURE ?” appears on the display.
Press the [F] key again to perform the full reset.
Note:
When you do not want to remove data such as memory channel data, save
the data using the MCP-1A (Memory control program) before performing the
full reset, then write the data to the transceiver after performing the adjust-
ment.
3. VCO Lock 1) Frequency: 173.950MHz DVM TX-RX CV TX-RX TC2 5.5V ±0.1V
voltage (A/2) (A/2)
RX
2) Frequency: 136.050MHz Check 0.5V or more
TX 3) Frequency: 173.900MHz TX-RX TC1 5.5V ±0.1V
4) Transmit (A/2)
5) Frequency: 136.100MHz Check 0.5V or more
6) Transmit
Transmitter Section (Refer to the Table 1 on page 22 for the frequencies which will apply in the adjustment mode.)
Measurement Adjustment
Item Condition Test- Specifications / Remarks
Unit Terminal Unit Parts Method
equipment
1. Frequency 1) Adj item: [FRQ.] f. counter Rear ANT Front Tuning Write 155.100MHz±50Hz
Adjust: [✳✳] panel panel control
2) Transmit
2. High power 1) Adj item: [HPL .] Power 50W±1W
[Low] Adjust: [✳✳] meter
2) Transmit
[Low’] 3) Adj item: [HPL1.] 65W±1W
Adjust: [✳✳]
4) Transmit
[Center] 5) Adj item: [HPC .] 65W±1W
Adjust: [✳✳]
6) Transmit
[High’] 7) Adj item: [HPH1.] 50W±1W
Adjust: [✳✳]
8) Transmit
[High] 9) Adj item: [HPH .] 50W±1W
Adjust: [✳✳]
10) Transmit
24
TM-281A
ADJUSTMENT
Measurement Adjustment
Item Condition Test- Specifications / Remarks
Unit Terminal Unit Parts Method
equipment
3. Low power 1) Adj item: [LPL .] Power Rear ANT Front Tuning Write 25W±1W
[Low] Adjust: [✳✳] meter panel panel control
2) Transmit
[Low’] 3) Adj item: [LPL1.]
Adjust: [✳✳]
4) Transmit
[Center] 5) Adj item: [LPC .]
Adjust: [✳✳]
6) Transmit
[High’] 7) Adj item: [LPH1.]
Adjust: [✳✳]
8) Transmit
[High] 9) Adj item: [LPH .]
Adjust: [✳✳]
10) Transmit
4. DCS balance 1) Adj item: [BALL.] Linear By turning the Tun-
Adjust: [✳✳] detector ing control, adjust
• Wide Detector: +P HOLD Oscilloscope the modulation wave
[Low] LPF: 3kHz until it becomes the
HPF: OFF square wave.
De-emphasis: OFF
2) Transmit
[Center] 3) Adj item: [BALC.]
Adjust: [✳✳]
4) Transmit
[High] 5) Adj item: [BALH.]
Adjust: [✳✳]
6) Transmit
• Narrow 7) Adj item: [BALC.]
[Center] (“N” icon appear)
Adjust: [✳✳]
8) Transmit
5. MAX devia- 1) Adj item: [MAXL.] Linear Rear ANT Write 4.0kHz±0.1kHz (According to
tion Adjust: [✳✳] detector panel the larger +P, –P)
AG: 1kHz/54mV K,M2,M3 Oscilloscope
• Wide AG: 1kHz/24mV M4
[Low] Detector: +P, –P AG Front MIC
LPF: 15kHz AF VM panel
HPF: OFF
De-emphasis: OFF
2) Transmit
[Center] 3) Adj item: [MAXC.]
Adjust: [✳✳]
4) Transmit
[High] 5) Adj item: [MAXH.]
Adjust: [✳✳]
6) Transmit
• Narrow 7) Adj item: [MAXC.] 2.0kHz±0.05kHz (According to
[Center] (“N” icon appear) the larger +P, –P)
Adjust: [✳✳]
8) Transmit
25
TM-281A
ADJUSTMENT
Measurement Adjustment
Item Condition Test- Specifications / Remarks
Unit Terminal Unit Parts Method
equipment
6. MIC sensi- 1) Frequency: 155.100MHz Linear Rear ANT Check ±1.2~1.9kHz
tivity AG: 1kHz/5.4mV K,M2,M3 detector panel
(Narrow) AG: 1kHz/2.4mV M4 Oscilloscope
Detector: P-P/2
LPF: 15kHz AG Front MIC
HPF: OFF AF VM panel
De-emphasis: OFF
2) Transmit
7. CTCSS fine 1) Adj item: [DVL.] Linear Rear ANT Front Tuning Write 0.75kHz±0.05kHz
deviation (“CT” icon appear) detector panel panel control
Detector: P-P/2 Oscilloscope
• Wide LPF: 3kHz
[Low] HPF: OFF
De-emphasis: OFF
2) Transmit
[Center] 3) Adj item: [DVC.]
(“CT” icon appear)
Adjust: [✳✳]
4) Transmit
[High] 5) Adj item: [DVH.]
(“CT” icon appear)
Adjust: [✳✳]
6) Transmit
• Narrow 7) Adj item: [DVC.] 0.37kHz±0.05kHz
[Center] (“CT” and “N” icon appear)
Adjust: [✳✳]
8) Transmit
8. DCS fine 1) Adj item: [DVL.] 0.75kHz±0.05kHz
deviation (“DCS” icon appear)
Detector: P-P/2
• Wide LPF: 3kHz
[Low] HPF: OFF
De-emphasis: OFF
2) Transmit
[Center] 3) Adj item: [DVC.]
(“DCS” icon appear)
Adjust: [✳✳]
4) Transmit
[High] 5) Adj item: [DVH.]
(“DCS” icon appear)
Adjust: [✳✳]
6) Transmit
• Narrow 7) Adj item: [DVC.] 0.35kHz±0.05kHz
[Center] (“DCS” and “N” icon appear)
Adjust: [✳✳]
8) Transmit
9. DTMF fine 1) Adj item: [DT.] 3.0kHz±0.1kHz
deviation Detector: P-P/2
LPF: 15kHz
• Wide HPF: OFF
De-emphasis: OFF
2) Transmit
• Narrow 3) Adj item: [DT.] 1.5kHz±0.1kHz
(“N” icon appear)
Adjust: [✳✳]
4) Transmit
26
TM-281A
ADJUSTMENT
Receiver Section (Refer to the Table 1 on page 22 for the frequencies which will apply in the adjustment mode.)
Measurement Adjustment
Item Condition Test- Specifications / Remarks
Unit Terminal Unit Parts Method
equipment
1. Band Pass 1) Adj item: [BPL.] Spectrum Rear ANT Front Tuning By turning the Tun- Refer to Fig. 1 (page 23).
Tuning Adjust: [✳✳] analyzer panel panel control ing control, adjust
[Low] 2) Spectrum analyzer setting the band-pass filter
Center-f: 136.050MHz Tracking TX-RX BPF waveform as shown.
Span: 200MHz generator (A/2)
RBW: 100kHz
VBW: 100kHz
ATT: 5dB
3) Tracking generator output
: –30dBm
[Center] 4) Adj item: [BPC.] Refer to Fig. 2 (page 23).
Adjust: [✳✳]
5) Spectrum analyzer setting
Center-f: 155.050MHz
Span: 200MHz
RBW: 100kHz
VBW: 100kHz
ATT: 5dB
6) Tracking generator output
: –30dBm
[High] 7) Adj item: [BPH.] Refer to Fig. 3 (page 23).
Adjust: [✳✳]
8) Spectrum analyzer setting
Center-f: 173.950MHz
Span: 200MHz
RBW: 100kHz
VBW: 100kHz
ATT: 5dB
9) Tracking generator output
: –30dBm
2. Squelch 1) Adj item: [SQTL.] SSG Rear ANT Write
Tight Adjust: [✳✳] Oscilloscope panel
2) SSG output
• Wide : –116dBm (0.35µV) AF VM EXT. SP
[Low] SSG MOD: 1kHz Distortion
SSG DEV: 3kHz meter
[Center] 3) Adj item: [SQTC.]
Adjust: [✳✳]
4) SSG output
: –116dBm (0.35µV)
[High] 5) Adj item: [SQTH.]
Adjust: [✳✳]
6) SSG output
: –116dBm (0.35µV)
• Narrow 7) Adj item: [SQTC.]
[Center] (“N” icon appear)
Adjust: [✳✳]
8) SSG output
: –116dBm (0.35µV)
SSG MOD: 1kHz
SSG DEV: 1.5kHz
27
TM-281A
ADJUSTMENT
Measurement Adjustment
Item Condition Test- Specifications / Remarks
Unit Terminal Unit Parts Method
equipment
3. Squelch 1) Adj item: [SQOL.] SSG Rear ANT Front Tuning Write
Open 2) SSG output Oscilloscope panel panel control
: –124dBm (0.14µV)
• Wide SSG MOD: 1kHz AF VM EXT. SP
[Low] SSG DEV: 3kHz Distortion
meter
[Center] 3) Adj item: [SQOC.]
Adjust: [✳✳]
4) SSG output
: –124dBm (0.14µV)
[High] 5) Adj item: [SQOH.]
Adjust: [✳✳]
6) SSG output
: –124dBm (0.14µV)
• Narrow 7) Adj item: [SQOC.]
[Center] (“N” icon apper)
Adjust: [✳✳]
8) SSG output
: –124dBm (0.14µV)
SSG MOD: 1kHz
SSG DEV: 1.5kHz
4. RSSI writing 1) Frequency: 155.050MHz RSSI value writing
2) SSG output: –53dBm (501µV) is performed by the
SSG MOD: 1kHz “Squelch open”
SSG DEV: 3kHz item (center wide).
SSG output level
is changed and ad-
justed after Squelch
adjustment.
This adjustment
should not turn the
Tuning control.
5. S-meter 1) Adj item: [S1.] Write
S1 Adjust: [✳✳]
2) SSG output
: –118dBm (0.28µV)
SSG MOD: 1kHz
SSG DEV: 3kHz
6. S-meter 1) Adj item: [S7.]
Full scale Adjust: [✳✳]
2) SSG output
: –96dBm (3.54µV)
SSG MOD: 1kHz
SSG DEV: 3kHz
28
TM-281A
TERMINAL FUNCTION
TX-RX unit (X57-8130-XX A/2) TX-RX unit (X57-8130-XX B/2)
: TX-RX Section : Display Section
Pin No. Name I/O Function Pin No. Name I/O Function
CN702 CN901
1 SPGND - AF GND 1 SPGND - AF GND
2 SPGND - AF GND 2 SPGND - AF GND
3 SPOUT O AF out 3 SPOUT I AF out
4 SPOUT O AF out 4 SPOUT I AF out
5 8C O 8V DC supply 5 8C I 8V DC supply
6 RXD I RXD/ PC serial data 6 RXD O RXD/ PC serial data
7 PTT I PTT/ PC serial data 7 PTT O PTT/ PC serial data
8 VOL I Volume 8 VOL O Volume
9 MICKEY I Microphone key 9 MICKEY O Microphone key
10 5C O 5V DC supply 10 5C I 5V DC supply
11 CM I Microphone key check 11 CM O Microphone key check
12 ENCA I Encoder A 12 ENCA O Encoder A
13 ENCB I Encoder B 13 ENCB O Encoder B
14 DI I Data from LCD driver 14 DI O Data from LCD driver
15 DO O Data for LCD driver 15 DO I Data for LCD driver
16 CE O Chip enable for LCD driver 16 CE I Chip enable for LCD driver
17 CL O Clock for LCD driver 17 CL I Clock for LCD driver
18 BRI O LCD brightness control 18 BRI I LCD brightness control
19 POWER I Power key 19 POWER O Power key
20 MIC I Microphone 20 MIC O Microphone
21 ME - GND 21 ME - GND
22 GND - GND 22 GND - GND
J701 (EXT. SP jack) J901 (MIC jack)
1 EXT SP O External speaker 1 MBL O Key detection
2 GND - GND 2 8C O Switched 8V for MIC
3 GND - GND
4 PTT I PTT/ PC serial data
5 ME - MIC GND
6 MIC I MIC signal input
7 HOOK I HOOK/ PC serial data
8 CM I MIC data detection
29
A B C D E F G H I J
1 TM-281A PC BOARD
TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION
-10: K -21: M2 -22: M3 -23: M4
Component side view (J79-0316-09 A/2)
2
C838
C822
1 2
Q714
F701
G
S
5
C826 +B
FB
R821
C817
R820 C828 GND
C833
Q713
C
R336 C
R337
C338 C
6
R809
R824
Q707
D710 D712
C801
IC711
BSB
C815 TEMP1 R828
R762
R825
O
IC712
C832
C830
I Q703 R756
TEMP2 R829
O
I
G Q702
C810
C776
R822
R770 C767
R757 R758 C763
1 8 C766 C764
7 8T
R771
IC708
X701
C775
R774
R737
C749
C806
C850
C772 R759
R826
R769
R765
R761
R739
C753
C774
R772
1 4 5 C771
R754 UL
25 1 8C
R778
TD1 26 100 RESET
CNVSS
8 R777 RD1
C761
SCLK
C834
L702
R842 BUSY 5C
R748 5M
R844
R843 R780 R776
R783
R751 R2
R749
R752
R753
R775
TXD
R779
R750 R3
C778
IC707 R4
RXD
IC715 R823 EPM
Q715
C820
9 CE
C827
C779
R841
R773
50 76
C824 51 75
Q704
R782
D
G
S
R815 C769 C765 R760 R755
R784
R817
R785
C809 C805 C768 R786
Q705
R763
10 R787
G
S
Q712
ADJ
C816
R819
R818
GND C783 R792
R768
R767
R766
R764
10 C777
Q706 C
R795
C789
R791 SQIN
DTMFIN R793
R833
R832
C781
C782
11 GND
C718
C720
C702
C703
C719
C848
POWER
C713
R703
R702
R704
R705
R707
R708
R706
R834
R701
C508
C586
R507 R505
GND 22
C509
SPGND 1
12
SPGND
SPOUT
SPOUT
8C
RXD
PTT
VOL
MICKEY
5C
CM
ENCA
ENCB
DI
DO
CE
CL
BRI
POWER
MIC
ME
C587
J79-0316-09 A/2 CN702
13
30
14
J K L M N O P Q R S
PC BOARD TM-281A 1
TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION
-10: K -21: M2 -22: M3 -23: M4
Component side view (J79-0316-09 A/2)
2
ANT
Ref. No. Address
IC302 3K
IC303 8P 3
IC707 9F
IC302
IC708 7E
IC711 6G
IC712 7F
4
IC715 9B
C418
Q502 11N
C417
3 4 Q506 8R
D314
D313 Q702 7F
C409
C408
C412
R377
C422 Q703 7F 5
R378
C416 Q704 10I
Q705 10I
TH703
L312
C835
Q706 10I
C356 L313
C355
C345 Q707 6F
C348
C350 Q708 10O
L314 C354 6
Q710 10O
Q712 10E
C407
Q713 6D
C814
Q714 5E
CN501
D316
8T
Q715 9D 7
D301
C394
R334 R341
C395
D301 7O
R338
C347
C333
R559
C334
C342
1 8
IC303
D305 8P
R344
R348
R339
4 5 R345 D312 8Q
R342
C70
R340
R351
R347
C401 R558 D313 5Q
D312
8
D305
C577
D314 5R
Q506
C579
G
S
D316 7Q
D
R557
C572 D501 12K
D502 12K
D503 11O 9
R835
D504 10O
R836
R837
D710 6F
PC/TV
C851
R838 D712 6F
R535
D504
8R
C575
Q708
Q710
R812 10
R529
R813
C552
TH501
CV R527
R526 C559
C807
D503
C565
QIN C534
AFV
C525
R521
11
C556
C544
C530
C524
RSSI
R520
C523
R519 GND BPF
R503 C515 Q502
C508
C586
D501
R507 R505
R508 C514
C509
R504
C584
12
C585
R506
C587
R509
D502
Component side
Layer 1
Layer 2 13
Foil side
31
14
A B C D E F G H I J
1 TM-281A PC BOARD
TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION
-10: K -21: M2 -22: M3 -23: M4
Foil side view (J79-0316-09 A/2)
2
R380
3
L316 C421
L320
C823
C420
TH702
4 C415
L319
C413 C410
5
C406
C405
C340
C404 C365
L318
C343
6
C344
D309
D306
D307
L317
C399 C397
D311 C400
R333
R332
R349 C402
C328
C330
S Q303
L315
C332 R331
D
R346
L308
C403 C312 L310
C309
C310
R350
L309
C306
7 R304 C308 L302 L305
R312
Q711
R307 R314 C329
R326
C318
R811
C849
C331
Q709
R816
R814
R560
C811
C581 4 3
C578 R44 IC710
Q10
C68 R42
R43 C69
C11
C804
8 L515
R45
C71
L21
C17 C18
R18 R8 5 1
R556
D9
R17
C64
C66
L19
C21
C28
C574 C72 R41 C15
L3
R22
C62 C63
C67
C12
D509 R46 5 4 R16
C576
C61
C14 R7
D10
L20
C65
IC2
Q3
C20
D2
R555
C60
C573
R40
R554 8 1
C10
R5
L18
C1
C9
C48
1
10
D508 C571 R37
Q9
C57
R38
1 5
R1
D7 R24
R25
R26
C59
Q7
R34
L514 IC1
C34
L10
3 4 R35
9
C55
L2
R30
C46 C41
C570 L17 C50 X1
11
20
R28
L1
R27
Q5
G
C54
S
R553 L16
D
C568
L13
D
S
G Q6
C49
C52
C569 R552
L11
L14
C6
R29
L12
R6
C567 C43
R11
D
S
G Q4
C3
C4
C7
C51
C45
R33
Q505 D G2
S G1
R551 R13
D1
C42
R545 R547
Q8
C58
C5
R550 C535
TC1
C38
C39
Q2
L15
R528 D8
R32
C566 TC2 R10
C29
C27
C25
C546 R532
R15 C23
R549
Q1
D4
R790
10
C53
R31
C549 L508 +
C36
C562 R546 L512 + + + C784
R12
Q504
C550 R537 R538 C35 L9 L8
R541 R540
C561
C56
R539 L5 R20 R19
D3
C551 1
R542
C16
R23
R9
C787
D G2
S G1
D5
L6
C560 C555 C548 D6 R21
L7
R789
C557 C558
C547
R544
L510 CV C788
L511
C545 C538
C554 C553 R794
R536 C541 7
C537
L507
D506
R796
D505
C790
L506 C502
R534
C517
C506
R502
R543 C518 R511 C513
11 R515
L502
C520
R512
C521 C522 R514
C582 R510 C516
Q501
C539
C519
R524 9 8 L504
R746
R742
R531 Q503 L503
GND BPF XF501 C505 R501
C533
R525
C503 C504
L505
IC501
C507
R522 C527
R523
(NARROW)
C528 R747
C583
R741
CF502
16 1
CF501
CD501
C511
12 (WIDE)
C510 R517
13
32
14
J K L M N O P Q R S
PC BOARD TM-281A 1
TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION
-10: K -21: M2 -22: M3 -23: M4
Foil side view (J79-0316-09 A/2)
2
Ref. No. Address
IC1 9I
J701 IC2 8F
EXT. SP
IC501 11F
C839
IC703 11M 3
+
IC704 11L
IC705 9K
IC706 12K
D714
IC709 10K
IC710 8J
R831
IC713 6O 4
IC714 8M
Q1 10I
Q2 10I
Q3 8G
C836
Q4 10H
Q5 9F 5
+
C847
Q6 9F
Q7 9F
Q8 10F
Q9 9G
C837
Q10 8F
I 6
Q303 7H
IC713 G Q501 11H
R332
Q503 11E
O
Q504 10C
Q505 10A
C818
C825
C829
Q701 12M 7
R781 Q709 7I
C853
Q711 7I
C854 D1 10I
3
D2 8I
0 R827 D3 10G
1 8
C840
C844
O D4 10F
C802 C727 R719 I
G D5 10G
C831
C758 C729
C808
IC714 D6 10F
R718
C747 D7 9F
R5
C751
C1
C743 +
D8 10F
R1
D9 8E
24
13
X1
9
D10 8E
L1
IC705
D306 6B
C6
R6
D307 6C
12
1
GND
D309 6A
C5
ADJ D311 6A
R744
R743
R745
R790 C786 R725
C757 D505 11B 10
C784 C785 R797
C793 R727 R726 C738 C735
R799 R802 C799
R710 D506 11B
C797 R807 R800
C794
R805
R711
1 14
R728
C754
C724
C787
D508 9A
IC709
R806
R789
C742 R730
C748
D509 8A
8
5
C798
C788 R810
R794 R801 R808 D702 12N
R738 R740
R722
7 8
4
IC703
R796 C800
R830
C795 IC704 D704 12N
C790
R804
R803
11
1
4
5
8
D711
C796
C731 D705 12O
C750
C752 D706 12O
C745 R723 R724
R746
R742
C736 C725
R715
L701
8 7
R721
C732
C734
R735 C746
C737
C722
C739 D708 12M
IC706
R717 C726 R714
C733 D709 12M
C821
R747
R734
R733
R729
C740
R741
Q701
14 1 D711 11L
D702
D704
D706
D705
D709
R736 C728
C744 D714 4M
R716 12
R713
D708
J79-0316-09 A/2
Component side
Layer 1
Layer 2 13
Foil side
33
14
A B C D E F G H I J
1 TM-281A PC BOARD
TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION
-10: K -21: M2 -22: M3 -23: M4
2 Component side view (J79-0316-09 B/2)
VR901
D906
D907
D909
D908
D911
4
5
8
CM 7
HOOK
MIC
ME
J901
6 PTT
GND
8C
D904
CALL VFO MR
2 MBL
TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION
8 -10: K -21: M2 -22: M3 -23: M4
Foil side view (J79-0316-09 B/2)
D901
9
MBL
8C
C901
GND
PTT
ME
10 MIC
D902
R914
R915
HOOK
CM R916
Q901
Q902
R921
R920
R919
R918
R922
B
R923
R924
CB
E
11 Q904
CB C Q903
C929
R917 E
C902
C903
R901
R909
C915
12 CN901
MICKEY
POWER
SPGND 1
SPGND
SPOUT
SPOUT
ENCA
ENCB
GND 22
RXD
VOL
MIC
PTT
CM
BRI
ME
DO
CE
8C
5C
CL
DI
C912
C910
C916
C918
C917
13
34
14
J K L M N O P Q R S
PC BOARD TM-281A 1
TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION
-10: K -21: M2 -22: M3 -23: M4
Component side view (J79-0316-09 B/2) 2
J79-0316-09 B/2
Ref. No. Address
S901
ENCODER D903 6K
D904 6G
D910
D911
D905 6O 4
D906 4F
D907 4G
D908 4H
D909 4I
D910 4L 5
D911 4J
6
Component side
Layer 1
D903
D905
MR REV FUNC
Layer 2
Foil side
7
TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION
-10: K -21: M2 -22: M3 -23: M4 8
Foil side view (J79-0316-09 B/2)
SP– Ref. No. Address
IC901 12K
10
Q901 11F
SP+
Q902 11F
Q903 11G
R905
R906
R904
Q904 11F
16 1
D901 9D 11
CP901
17 64 D902 10D
C928
R913
C926
R910
R911
IC901
R912
C927
C922
C920
R908
C921
L901
C924 12
R903
R902
32 49
33 48
Component side
Layer 1
Layer 2
Foil side 13
J79-0316-09 B/2
35
14
A B C D E
TM-281A
TX-RX UNIT (X57-8130-XX)(A/2) : TX-RX SECTION
SCHEMATIC DIAGRAM
1
R9
470 RX VCO
Q1,2 CV D3,5
1000p
R:0.73V
R12
5.6k
C16
SWITCHING VCO OSCILLATOR BUFFER AMP
T:0.72V R:6.03V
FREQENCY
R23
C49 4.5p Q9
10k
D1 R10
CONTROL R:5.85V R:1.07V 2SC5108(Y)F
Q1 Q4
HZU5ALL 8.2k R15 R19 R21 L5 L6 D5 C36 L12 MCH3914(7)-H C54
2SA1832(GR)F
VOLTAGE Q2 C60
1k 2.7k 1.5k 270n HVC359 30p 33n 0.3p
DROPPED R11 2SC4738(GR)F
27u
L15
27u
L13
6p
470p
C23
C39
8p
120k
5p
R35
HVC359
33n
1k
R20
L18
0.047u35
R4 1k
C45
10k
270n
D3
L8
1p
0.1u35
R13
10k
C25
R3 1k
C29
C51
R32
220
C61
TC2
470p
C42
6p
1.5u16
3p
R2 1k
C27
470p
100
C57
R38
R:6.91V
20
19
18
17
16
15
14
13
12
11
100p
100p
100p
C4
C7
C3
R29 T/R SWITCH
CLOCK
R
NC5
FOUT
NC4
FC
LE
DATA
NC3
PLL IC
R37
470p
C59
470
0
IC1 Q5 Q7
R5 TCXO
OSCOUT
MB15A02PFV2E1 T:6.77V 2SJ347F UMC4N
R28 L17
OSCIN
10k X1
GND
VCC
NC1
NC2
FIN
220
DO
R34
VP
LD
C1 R:6.85V
R30
100k
D4,6
C48
1000p
VC +DC TX VCO 1k
4
5
9
10
22u
1000p
VCO
C6
16.8MHz FREQENCY C50
L1
T:3.68V 10p
470p
CONTROL
C20
RF AMP T/R SWITCH
100k
R1
GND T:0.77V
8CL
0.1u
OUTPUT C9 Q6
Q3 R:0.71V D6 C35 L11
2 L77-1944-05
L2 C14
C21 R16 2SC4649(N,P) L7 HVC359 82p 47n MCH3914(7)-H C55
270n
C41
0.5p R:4.84V
1SV278F 0.5p
10u 470p 0
27u
27u
10p
C38
C15
L16
L14
R:4.93V 0.1u T:0V
HVC359
C52 11p
R22
22k
270n
C10
R:2.29V
68p
D4
L9
10u
R7
CK(CPU54)
10
DT(CPU53)
PLLE(CPU3)
DA2S101
RIPPLE
TC1
TCXOMOD
0.5p
R33
470p
C46
10p
FRQO
D7
0.01u
C43
RIPPLE
100
FILTER
C17
D2
1.5k
FILTER
L3
R6
R17
R:7.82V
470
Q8
R8 KTC4075E(Y,GR)
D7 OSCILLATOR
100k R:4.94V
470p
VCO
DA2S101
C28
1000p
1000p
1000p
C11
C12
10u
C18
C5
0.1u
0.1u
R31
C53
MODULATION
4.7k
C58
D8
L10 R27
47k
1000p
R18
C34
0
R:7.59V
100k
R24
C758
RIPPLE
10u
22u16
FILTER
C56
8C
R25 R26 8CL
5C
8C
5C
47k 47k
UL(CPU21)
PLLE(CPU3)
MOD
C747
10u
3
DT(CPU53) DT(CPU53)
CK(CPU54) CK(CPU54)
FRQO PC/TV
MIC
W/NO(EVOL2)
W/NI(EVOL1)
VOLO(EVOL15)
5C
VOLI(EVOL13)
C751
1u
BRI
R718
R:2.21V
1.5k
24
23
22
21
20
19
18
17
16
15
14
13
W/NO(EVOL2)
IC705
W/NI(EVOL1)
FRQI
FRQO
BLO
BLI
GND
RESET
VDFref
DO
2VOLI
MODO 2VOLO
1VOLO
1VOLI
M62363FP-F
1000p
R715
C727
C729
R719
L701
680
10u
1.2k
DIGITAL
PC/TVO
PC/TVI
POTENTIOMETER
W/NO
MODI
BRIO
W/NI
VDD
CLK
BRII
DAT
LD
1
3
4
5
8
9
10
11
12
C725
5C
0.1u
R743 1k
1000p
C743
4 5.00V R744
R745
1k
1k
1000p
C722
R714
100k
C738 R726
0.1u 18k
C735 68p
R725 R728 R730
1000p
C748
MICMT(CPU77)
MODI(EVOL9)
R722 240k 82k 82k
1.5k
820p
C742
5C
5
8
3
2
R:5.00V
V+
R727
330k
IDC IC704
R710
15k
C731
0.01u
NJM12904RB1
SPLATTER FILTER
OP AMP
VCC
PC/TVO(EVOL3)
MODO(EVOL10)
MICMT(CPU77)
TX/RX (CPU20)
HPF
EVLLD(CPU8)
PLLE(CPU3)
R:2.50V UL(CPU21)
PC/TV
8C
1
6
7
MOD
C752
C754
10u
IC703
R711
C724
NJM2100V-ZB 3900p
10u
15k
R835 R721
R738 R740 R749
OP AMP
C734
68k 68k 5.6k
R748
R736
5
10k
22k
C750
C746
150p
0.1u
C757
10u
C732
Q701
2SC4919-S C726
R735
R829
270k
R836 OP AMP
R746
82k
0
R717
C733
TH702
C745 IC706
C823
1000p
100k
0.1u BA10324AFV
-t
AGC/ 39p
1
R741
MIC MUTE R734 14
150k
D709 R828
R:0.76V 1SS372F 220k 2 13
0
TH703
R837 R716
C835
1000p
100k
3
R747
1/2Vcc 12
-t
100k
100
4
C728
2.2u
R:0.76V 8C 11
VCC VEE
R:7.81V 5 10
1000p
C737
DETECTION
6 9
R742
120k
R729
R733
R838
120k
680k
8C 7 8
DA2S101
R723
9.1k
D708
R:3.35V
MIC MUTE
C740
C744
R:1.47V
10u
0.1u
1000p
R724
C736
C739
6.8k
10u
R713
820
PLLE(CPU3)
R737 R739 QT/DQT(CPU1)
6 10k 22k
C753
4700p
C749
0.01u
EVLLD(CPU8)
TX/RX (CPU20)
UL(CPU21)
TX DTMF
XOUT(CPU11)
XIN(CPU13)
BEAT
R759
SHIFT
1k
SWITCH L78-1427-05 BEAT
X701 SHIFT
Q702 C763 R758 C767 SWITCH
2SC4919-S
3p 0 3p
R756 R762
C766
C764
5p
5p
10k 10k
Q703
BEAT SHIFT ON:4.87V 2SC4919-S
X57-8130-XX C726 C732 C734 R717 R721 R835 R836 R837 R838
BEAT SHIFT OFF:0V
BSHIFT
-10 K 0.039u 1000p 0.022u 18k 750k 0 NO NO NO 1/2Vcc
-21 M2 0.039u 1000p 0.022u 18k 750k NO 0 NO NO
5M
-22 M3 0.039u 1000p 0.022u 18k 750k NO NO 0 NO
7 -23 M4 0.068u 680p 0.039u 10k 1M NO NO NO 0
36
X57-813 (A/2) 1/3
F G H I J
TX-RX UNIT (X57-8130-XX)(A/2): TX-RX SECTION
SCHEMATIC DIAGRAM TM-281A
R:5.00V X57-8130-XX R766 R767 R768
-10 K 0 0 0
R:4.82V D9,10
1000p
RF SWITCH T:5.55V
220p
RF AMP T:4.76V -21 M2 NO NO NO
C66
C64
R:5.96V
1 8 R:2.51V Q10 D9 HSC277 R307 C308 L302 L305
VCC1 VCC2 2SC5108(Y)F C72 -22 M3 NO NO 0
C62 2 7 C65 C67 0 1200p 22n 10n
IN OUT 18p R:5.59V
2p 3 6 1000p 18p R:1.81V -23 M4 NO 0 0
D10 HSC277
C312
R304
C310
C309
IN SW2
12p
6p
8p
1k
2.2k
C546
R46
4 5 R528 R532
GND SW1
C71
39p
L21
39n
1000p
1000p
100
C68
R45
R40
100n
L20
8.2k
R41
R43
R42
C63
100
10k
1k 0 27p
1k
IC2
C306
1000p
UPB1509GV
1000p
C535
L508
47n
DIVIDER
C69
1000p
R44
100
L19
1000p
C70
5C
8C
8R
BPF
8R
8R
8R
1000p
8T
C549
R550
R:7.07V
C582
1p
R:2.48V
R537
10k
C552
1000p
1000p
1000p
1000p
C575
C550
C569
R540
470k
L71-0655-05
47k
R:7.52V R:0.71V MIXER RF AMP
R552
XF501
47k
Q504 Q505
R551
D505,506 D508,509
100k
1000p
C567
C527 R524 R525 R531 L507 3SK318 R:6.78V 3SK294-FP
R358
220k
R:3.20V RF BPF TUNING R:2.85V RF BPF TUNING
5p 390k 270 100 390n
390n
L506
L505
C551 R542 C555 C560 R547 C568 C573
3.3u
IF AMP R:1.23V
R536
100p 0 1p 1000p 0 100p 4p
C533
C539
20p
C537
20p
6p
560
R553
27k
R541
D506 C558
D505 C554
L512
33p
33k
24p
C545
R545
330n
C576
Q503
C571
1k
18p
18p
R539
R556
1000p
C547
C528
R522
C548
0.01u
0.01u
100
180
KTC4080E-P
1000p
R549
C566
L510
150
C557
68n
L511
0
13p
C553
68n
5p
R534
3p
C541
1000p
1SV325F
C538
L514
1.5p
68n
0.01u
1SV325F
220
C574
C570
1p
1000p
R546
R523
C561
1SV325F
100
1SV325F
0
D508
D509
L515
68n
8R 8R
C562
1000p
100k
C544
R555
R543
R544
R554
100k
100k
100k
0.1u
TV R557 TV
C579
C565
100k
1000p
C556
1000p
1000p
1000p
C572
R559
Q506
R558
2SK1830F
C577
27k
1000p
47k
PC/TV SWITCH
T:4.87V
DT(CPU53)
CK(CPU54)
PC/TV PC/TV
MIC MIC
W/NO(EVOL2) W/NO(EVOL2)
W/NI(EVOL1) W/NI(EVOL1)
VOLO(EVOL15) VOLO(EVOL15)
VOLI(EVOL13) VOLI(EVOL13)
BRI BRI
8TC(CPU80) 8TC(CPU80)
8RC(CPU76) 8RC(CPU76)
SPM(CPU51) SPM(CPU51)
AMPSW(CPU52) AMPSW(CPU52)
R:4.94V
ENCA
ENCB
DO
CL
CE
DI
R:7.04V
8R
5C
5M R763
R501 L502 R502
0 C505
0
R760
120k 330n
C502
0.01u
100
47k
R755
47k
C768 68p
R766
R767
R764
R768
C765 R:0.71V L504 C507
0.1u
C769 330n 0.01u
1000p
L503
330n
C504
C506
47p
56p
1000p WIDE(CPU65) Q501
NARROW(CPU64) KTC4080E-P
W:4.90V
C503
50.4MHz
TRIPLER
270p
N:0V
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
SQ ON:0V
R509
SQ OFF:4.94V FM IC
0
NC
ENCA
ENCB
NC
DI(from LCD)
DO(to LCD)
CE
CL
NC
NC
WIDE
NARROW
ADJ
VSS
NC
VCC
DST4
DST3
DST2
DST1
NC
CK
DT
AMPSW
SPM
IC501
76 50
R506
C508
UA31136L
R504
NC AFM WIDE
10k
10k
1u
R773 R:5.00V
C583
MICMT(CPU77) 77 49 CF501 1 16
4p
MICMT NC IF SWITCH
C584 C585 OSCIN
78 48 0 MIXIN
IF SWITCH D502 2
NC NC 0.1u 0.1u OSCOUT GND 15
R517
D501 MC2858-T111
1.8k
79 47 C514 0.1u
8RC NC MC2858-T111 3 MIXOUT 14
N-REC
CD501
80 46
8TC NC 4 13
R508
VCC
6.8k
81 45 CE CF502 N-DET
NC NC C586 C587 C515 0.1u 5 12
IFIN RSSI
82 44 R843 C522
SBC CEFLS 5M 0.1u 0.1u C517 0.1u 6 11
DEC IFOUT
R503
6.8k
83 43 47k
R507
R505
NARROW 7 27p
10k
10k
NC NC FILOUT QUAD 10
84 42
NC NC 8 9
R512
FILIN AFOUT
560k
330p
C513
R753 85 41
NC NC W:0V
47k 86 40 EPM N:4.90V
R752
47k
CM NC C516
87 39 R841
C509
CM MICKEY2 MCU EMPFLS 5M 330p
C521
1u
0.01u
88 38 47k
MICKEY MICKEY IC707 RXD TXD R511 C518
NC
R779
30622MEP540GU
47k
89 37
22k
C510
VOL NC
C511
100p
10u
VOL
0.01u
R510
R750 1k 90 36 R775
1k
TEMP2 NC RXD
R751 1k 91 35 1k
TEMP1 PTT PTT FILOUT
92 34
RSSI RXD BUSY R776 R780
93 33 1.5k 47k W/NI(EVOL1) C519 R514
SQIN TXD 5M
94 32 R844 10u 4.7k
AVSS BSYFLS 5M
10k
C761
95 31 R842 VOLI(EVOL13) AFV
0.1u
DTMF IN CLKFLS R777
L702 96 30 10k 10k
R515
4.7k
VREF RXD1 5M
97 29 R778
AVCC TXD1 5M 5C
R:4.94V 98 28 10k R783 C778
C520
NC NC
1000p
99 27 SCLK 39k 1u
C779
NC NC RD1
0.1u
100 26
NC EEPWP TD1
EEPSDT
AF MUTE
POWER
BSHIFT
CNVSS
RESET
EEPCK
EVLLD
TX/RX
DTMF
XOUT
TONE
PLLE
Q704
GND
GND
VCC
VSS
XIN
INT
NC
NC
NC
NC
NC
NC
R782
UL
AFM(CPU50) 2SK3019
R784
15k
1k R:2.19V
1
2
6
7
10
11
12
13
14
R761 15
16
R765 17
18
19
R769 20
21
22
23
24
25
5M
C777
0.47u
PLLE(CPU3)
CNVSS
47k
R757
1k
1k
QT/DQT(CPU1) Q705
47k
R781
5M RESET EEPROM 2SK3019
47k
150k
R785
R786
12k
R772 R774 IC708 4.94V
EX24064ASAS0A AF MUTE
EVLLD(CPU8) 10k 4.7k
1800p
3900p
C775
C774
TX/RX (CPU20) 1 8
A0 VCC
UL(CPU21) 2 7
TX DTMF A1 WP
R826
3
47k
6
XOUT(CPU11) A2 SCL
R754
XIN(CPU13) 4 5
47k
VSS SDA
120k
R787
POWER
C776 1000p
R770
R771
C771
C772
1000p
47k
0.1u
0
RSSI(CPU92) RSSI(CPU92)
SQIN(CPU93) SQIN(CPU93)
DTMF IN(CPU95) DTMF IN(CPU95)
SBC(CPU82) SBC(CPU82)
BSHIFT INT(CPU18)
1/2Vcc 1/2Vcc
RESET(CPU10)
5M
5M
5M
37
X57-813 (A/2) 2/3
K L M N O
TM-281A SCHEMATIC DIAGRAM
IC302
RF_OUT
RA60H1317M231
RF_IN
POWER MODULE
VGG
VDD
TX-RX UNIT (X57-8130-XX)(A/2): TX-RX SECTION
4
T:7.67V 65W:4.29V
DRIVE AMP 25W:3.43V D306,307 ANT
D306
Q303 ANT SWITCH L407CDB C405 C413 C420
0.022u
1000p
1000p
100p
L309
C329
C331
RD00HVS1-T113 120n
C345
C348
C354
22p
T:2.71V
R336
R332
47
2p
10
1000p 4p
R350 STRIP LINE D307
L317 L407CDB C406 L319 L320 R380
10 L308 L310 C332 R331 ANT
R312
1.5T 5T 5T 0
4.7k
1000p
L315
9.5T
8.2n 47n T:1.58V
C421
150p 10
C410
C417
C404
C415
0.5p
22p
L316
18p
18p
9.5T
18p
C365
L314
L312
L313
1000p
6p
C338
R333
R337
13p
C330
C328
2.5p
100
L318
100
5T
1000p
R326
C408
C318
0.01u
C397
1000p
R346
R349
C399
12k
0.5p
220
220
R314
22k
JDP2S12CR
JDP2S12CR
D313,314
1000p
100p
C409
C340
C343
1000p
220p
C344
C350
C355
C356
47p
22p
C418
4p
1000p
APC VOLTAGE
D311
0.01u
4p
C402
C400
D309
C403
27p
DETECT
8T
B
D313 D314 D702,704-706
HSB88AS-E HSB88AS-E SURGE ABSORPTION
8T
D309,311
R560 5M
ANT SWITCH
0
APC CONTROLLER T:7.73V
MC2850
1000p
1000p
C412
R377
C422
R378
D706
MC2850
D704
10k
10k
IC303
RB521S-30
NJM12904RB1
R334
D316
1000p
C394
C395
0.1u
150k
R341
MC2850
MC2850
D702
D705
100
UDZ5.1(B)
1000p
R338
C333
D301
C334
150k
C342
100p
C347
4.7u
1 8 D316 CN702
0.1u
VCC
2 7 PROTECTION SPGND
1
R344
SPGND
100k
3 6 2
C578 C581 POWER
VOLTAGE SPOUT
PROTECTION 4 5 65W:1.25V 3
R339
33p VEE TEMPERATURE
R345
100k
39p
10k
25W:0.77V SPOUT
COMPENSATION 4
D312 R348 8C 8C
5
15k R703
R342
RB521S-30 RXD
1.5k
R351
6
47k
RXD
R347
PROTECTION
1.5k
1000p
1000p
C416
C407
1000p
C401
100 R702 PTT
TV D305 PTT 7
R704 1k 100 VOL 8
DA2S101 VOL
R340
R705 1k MICKEY
22k
MICKEY 9
5C 5C
CN501 10
R707 CM
CM 11
R557 1k R708 ENCA 12
ENCA
1000p
100k
C579
0 R706 ENCB
ENCB 13
PC/TV 0 DI
DI 14
MIC MIC DO
W/NO(EVOL2) DO 15
CE
CE 16
VOLO(EVOL15) R834 CL
CL 17
1k BRI
BRI BRI BRI 18
8TC(CPU80) POWER
POWER 19
8RC(CPU76) R701 MIC
20
SPM(CPU51) 0
0.047u
0.047u
ME
1000p
1000p
1000p
1000p
AMPSW(CPU52) 21
GND
22
C713
C718
C719
C720
C702
C703
8R
1000p
C559
AUDIO AMP
IC715
LA4600
DETECTION PROTECTION
D503 10 9 8 7 6 5 4 3 2 1
D504
R519
C524
0.1u
10k
HSB88AS-E R526 DA2S101 R535
C530
0 0
0.039u
390k
C534
R529
R527
470k
0.022u VOLO(EVOL15) C808 R818 R819 C816
47u16
0.1u
4.7u
1u 68k 12k 0.22u
1000p
330u25
R817
C834
R520
C836
470k
47k
R:3.20V
TH501
R:1.02V
470k
R833
C824
C827
C831
-t
C523 AF MUTE
R:0.45V
Q712 J701
5600p Q502 SPM(CPU51) R815
2SC4617(S) DTC363EU
4.7k
1000p
C809
C805
R832
1u
0.22u
C525
R521
SQL AMP
0
R823
1k
390
EXT SP
1000p
C838
AF MUTE
W/NO(EVOL2)
SQIN(CPU93)
Q715
AMPSW(CPU52) RT1N141U-T111
1000p
C820
R831
R830
0
0
BSB
5C
C785 R797 C793
0.01u 2.7k 0.018u
FB
8T
BSB
0.039u
OP AMP Q709,711
B
8T
C786
IC709 T:7.72V
DC SWITCH (8T) Q711
BA10324AFV R800 2SB1694
R790 5.6k R814
1 14 Q709 DC SWITCH (SB)
R:13.8V
C849
RT1N141U-T111 1.5k
C814
C787
12k 2 13
8200p
FILOUT
0.01u
0.01u
10u
10u
C784
C794
T:13.8V C822 1000p
R816
R805
R807
R811 R:13.8V
5.6k
1M
3 12 8TC(CPU80)
47k Q714
11 0 2SJ645 F701
4 R:7.79V
VCC VEE B
C799
4.7u
5 10 SB 4A
R821
C817
1000p
1000p
C826
47k
8R
Z5W27V
E
330u 25
1000p
R802 Q708,710 Q710
C851
C807
C833
D714
C839
C847
6 9
10u
1000p
1000p
10u
C788
C781
0.01u
8V AVR
2SB1694
7 8 47k DC SWITCH (8R)
8R 8C
R799
R789
C797
R812 IC711
220k
470k
39p
R796
Q708
18k
C828
TA7808F-NQ
R820
1000p
C798
220
0.22u
RT1N141U-T111 2.2k DC SWITCH (SB)
RX R813 2 1
R794
Q713
120k
8RC(CPU79) OUT IN
C795 R801 47k RT1N141U-T111 REVERSE
R:3.34V GND
C806
C850
C810
C815
10u
10u
CONNECTION
0.1u
0.1u
0.22u 0 3 PROTECTION
1/2Vcc
R:7.82V
R791
R806
8C 5V AVR
0.033u
2.7k
120k
C790
8C R:5.00V IC713
IC710 R:7.82V
Q706 R:3.22V 5C XC6209B502P-G R:4.94V TA7805F-NQ
C782
2SC2412K 5C
0.1u
5M 1
5
C789 2
C848
C802
C804
0.01u
OUT IN
C811
10u
10u
0.1u
NC VOUT
VIN
GND
1000p
0.033u
C825
C829
C837
C818
C821
22u
22u
0.01u
0.01u
R793
3
91k
BUFFER
VSS
R:2.62V AMP
CE
R795 5V AVR
1
5.6k
C853
C854
22u
22u
C783
R792
5.6k
1u
LIMITER
R824
470k
5M
D711
R803
3.9k
1SS372F R:4.93V
D710 PROTECTION
R810 IC712 IC714
R825
XC61CN4002MR XC61CN3202MR
390k
5C R:4.56V
15k DA2S101
R804
R:0V 3 1 3 1
1200p
C796
VIN VOUT VIN VOUT
12k
R808
C800
1000p
15k
Q707 D712 R809 VSS VSS
R827
330k
R:5.98V
R822
330k
RT1N141U-T111
1000p
C801
UDZW18(B) 470 2 2
OVER VOLTAGE OVER VOLTAGE
DETECTION
SQIN(CPU93) DETECTION
DTMF IN(CPU95) VOLTAGE VOLTAGE
C840
C844
FB
C832
1000p
C830
DETECTION
1000p
0.1u
0.1u
SBC(CPU82) SBC(CPU82) DETECTION
(INT) (RESET)
INT(CPU18) INT(CPU18)
1/2Vcc
RESET(CPU10) RESET(CPU10)
8C
38
X57-813 (A/2) 3/3
P Q R S T
TX-RX UNIT (X57-8130-XX)(B/2) : DISPLAY SECTION
SCHEMATIC DIAGRAM TM-281A
INT SP LCD
1
+ SPOUT
- SPGND
MR VFO CALL
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
ENCODER
COM3
COM2
COM1
COM0
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
D901 S901
REVERSE W02-3704-05
C901
CONNECTION REV Func
0.1u PROTECTIOM
D901 R901
1SS355 0
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
C902
C903
0.1u
0.1u
R902
R905
R906
R904
SEG31
SEG30
SEG29
SEG28
NC
NC
NC
KS2
KS1
COM3
COM2
COM1
COM0
NC
NC
NC
0
4.7k
0
0
49 32
NC
50 SEG27 31
J901 7.56V SURGE
ABSORPTION 51
KI1
SEG26
30
2
8 CM KI2 SEG25
HOOK R903 52 29
MIC KI3 SEG24
UDZW6.2(B)
ME 4.7k 53 28
PTT NC SEG23
D902
GND 54 27
8C NC SEG22
MBL(Key A) 4.96V 55 26
1 VR901 NC LCD DRIVER SEG20
R31-0662-05 R908 56 25
CN901 VDD IC901 SEG20
100 57 PT6554LQ 24
SPGND
100p
C915
VDD1
C921
C920
1 SEG19
470p
58
C910
1u
23
1000p
SPGND
2 VDD2 SEG18
SPOUT 59 22
3 VSS SEG17
SPOUT VARIABLE 60 21
4 RESISTOR OSC SEG16
8C CP901 61 20
5 DO (to cpu) SEG15
62 19
6 RXD CE SEG14
PTT 63 18
CL SEG13
7
64 SEG12 17
1000p
C916
C917
C918
1000p
1000p
VOL
SEG11
1k x4
SEG10
8 DI (from cpu)
SEG0
SEG1
SEG5
SEG7
SEG8
SEG2
SEG3
SEG4
SEG6
SEG9
MICKEY
NC
NC
NC
BL
9 5.00V
5C
8
9
10
11
12
13
14
15
16
10 L901
11
CM
3
C924
0.1u
C922
1000p
ENCA 5.00V
12
ENCB
R913
56k
13 R910 R911 R912
DI
14 10k 10k 10k
DO C928
680p
C926
C927
100p
100p
15
CE
16
CL
17 LCD BACKLIGHT SWITCH LCD ILLUMINATION
BRI
18 7.81V Q903
D906 D907
POWER 2SB1132(Q,R) R922
19
MIC
330 B30-2337-05 B30-2337-05
1000p
KEY BACKLIGHT SWITCH
1000p
20 KEY ILLUMINATION
C929
C912
ME D908 D909
Q901
21 D903 D904 RT1P141U-T111 R923
GND R914
R917
22 330 B30-2337-05
3.9k
B30-2337-05
1k
D910 D911
D905
R915 R924
R918
330 B30-2337-05 B30-2337-05
820
1.5k
D903-905
R916
18k
B30-2337-05 BRIGHTNESS D906-911
LED FUNCTION Q904
LED
R920
SWITCH UMG3N
18k
RT1N141U-T111
Q902
R909 R919 4
1k
R921
100k
2.7k
DC SWITCH
7
Note: The components marked with a dot (•) are parts of layer 1.
39
X57-813 (B/2) 1/1
TM-281A
BLOCK DIAGRAM
TX-RX UNIT (X57-8130-XX B/2): Display section TX-RX UNIT (X57-8130-XX A/2): TX-RX section
Q3
IC1 2SC4649(N,P)
MB15A02PFV2E1
PLLE Fin
DT AMP
CK PLL IC
UL 8C Q4
5C MCH3914
16.8MHz Q1
5C RX
MIC CHARGE 2SA1832(GR)F
TCXO PUMP Q2 VCO
TCXOMOD 2SC4738(GR)F
MICKEY 16.8MHz
8C
GND VR901 POWER X1
PTT/TXD R31-0662-05 L77-1944-05
VARIABLE RESISTOR VOL 5C LOOP CV 8CL SW
ME
MIC FILTER
RXD
CM
D/A IC705(5/8)
CONV. M62363FP-F TX
MR VFO CALL KS1
VCO
5C
SP RIPPLE 8CL VCOMO
8C
FILTER
SPOUT ENCA
SPGND MHz REV FUNC KS2 VCO oscillation fr
ENCB Q8
KTC4075E(Y,GR) RX: 371.900~447.
S901 D8 387.900~395.
W02-3704-05 DA2S101 TX: 272.000~347.
ENCODER KI3 KI2 KI1 288.000~295.
D
HSB
SQIN N
VCOMOD DET
KI1
KI2
KI3 KS1
KS2 IC705(6/8) D/A
M62363FP-F CONV.
IC901 DO
LCD COM0~3 PT6554LQ CE 5C
DISPLAY SEG0~31 TCXOMOD
LCD DRIVER CL
DI IC706(3/4) BUFFER
5C BA10324AFV AMP
BL
SPGND 8C
SPGND
SPOUT
SPOUT IC705(3/8) D/A
8C M62363FP-F CONV.
RXD
PTT/TXD
VOL 5C
MICKEY
5C
CM IC706(1/4) SUM
ENCA BA10324AFV AMP
ENCB
BSHIFT
DI TX/RX
DO DTMO, 8C SPM
CE Q701 TONE AMPSW
CL 2SC4919-S NARROW
D708 IC703 IC704 WIDE
BRI DA2S101 NJM2100V-ZB NJM12904RB1 MICMT
POWER 8TC
8C D903~D905 MIC MUTE MIC SPLATTER 8RC
B30-2337-05 ME SW AMP FILTER SBC
KEY BACKLIGHT GND
BL SW SW
MICMT 5C 8C
INT
Q902 Q901 RESET
RT1N141U-T111 RT1P141U-T111 AGC
POWER
D709 UL
ENCA
D906~D911 1SS372F
ENCB
B30-2337-05
8C
IC705(4/8)
M62363FP-F
LCD ILLUMINATION
BRI SW SW D/A
BRI
CONV.
Q904 Q903
UMG3N 2SB1132(Q,R)
5C
40
TM-281A
BLOCK DIAGRAM
RX: 136.000~173.9975MHz (K,M2,M3)
D306,D307 144.000~147.9975MHz (M4)
L407CDB
TX: 136.000~173.9975MHz (M2,M3)
Q4 Q9 IC2 Q10 D9,D10 Q303 IC302 D309,D311
RD00HVS1-T113 RA60H1317M231 144.000~147.9975MHz (K,M4)
MCH3914(7)-H 2SC5108(Y)F UPB1509GV 2SC5108(Y)F HSC277 JDP2S12CR
RX BUFF RF TX/RX DRIVE POWER
COMM MODULE ANT SW LPF ANT
VCO AMP DIVIDER AMP SW AMP
8CL 5C 8C 8T 8R 8T +B Vgg 8T
CL SW TX/RX
D313,D314
Q5 HSB88AS-E
2SJ347F POWER
Q7 1st Local APC DETECTOR
UMC4N 16.8MHz 185.950~223.9475MHz
(K,M2,M3)
TX IC303
VCO Q6 193.950~197.9475MHz NJM12904RB1
8T TH702,TH703
Q501 (M4)
MCH3914(7)-H KTC4080E-P TRIPPLER NCP18WF104J03
VCOMOD TEMP. TEMP1
2nd_Local DETECTOR
IC501 Q503 Q504 Q505 TEMP2
50.4MHz
oscillation frequency UA31136L KTC4080E-P 49.95MHz 3SK318 3SK294-FP
371.900~447.895MHz (K,M2,M3)
W/NI IF IF
387.900~395.895MHz (M4) MCF MIXER BPF LNA BPF
DEMODULATOR AMP
272.000~347.995MHz (M2,M3) RSSI
288.000~295.995MHz (K,M4) Q506
XF501 2SK1830F
5C 8R L71-0655-05 8R 8R
D503 Q502
2SC4617(S) RF BPF RF BPF D508,D509 SW
HSB88AS-E
TUNE TUNE 1SV325F
QIN NOISE NOISE
DETECTOR AMP D505,D506
1SV325F
L72-1034-05
8R IC705(2/8) IC706(4/4)
CF501 M62363FP-F BA10324AFV
(WIDE)
D/A DC
SW 450kHz SW AMP
D500 CONV.
D502
MC2858-T111 CF502 MC2858-T111
(NARROW)
5C 8C
L72-0999-05
NARROW
WIDE
IC705(1/8) IC709 IC705(7/8,8/8) Q712 IC715
Q706 Q704,Q705 LA4600
M62363FP-F BA10324AFV 2SC2412K 2SK3019 M62363FP-F DTC363EU
BSB EXT
D/A AF D/A SP
W/NI HPF MUTE MUTE AF AMP
CONV. FILTER SW CONV. SW
DTMF 5C
5C 8C DTMFIN 8C AFM 5C SPM
SPOUT
AMPSW SW SPGND
5M Q715
RT1N141U-T111
BSHIFT PLLE 8C BSB FB
TX/RX EVLLD
SPM TXD IC711 Q714
Q711 TA7808F-NQ 2SJ645 F701
AMPSW DT 2SB1694
NARROW CK F53-0327-15
WIDE DO TEMP1 AVR
TEMP2 8T SW SW FUSE +B
MICMT CE 8V
8TC CL RSSI
MCU SQIN E
8RC DTMO Q709
SBC TONE DTMFIN RT1N141U-T111
IC707
8TC SW SBC SW INT INT
30622MEP540GU
Q710 Q713 IC712
INT MICKEY 2SB1694 RT1N141U-T111 XC61CN4002MR
RESET CM
POWER VOL 8R SW
UL PTT
ENCA RXD Q708
ENCB DI RT1N141U-T111
XOUT XIN OVER 5M AVR
8RC SW 5V
VOLTAGE
EEPSDT DETECT IC713
X701 EEPCK TA7805F-NQ
L78-1427-05 EEPWP 5M
8.000MHz INT SW FB
5C AVR
EEPROM 5V RESET RESET
Q707
BSHIFT SW RT1N141U-T111
IC708 IC710 IC714
D712 XC6209B502P-G
Q702,Q703 EX24064ASAS0A UDZW18(B) XC61CN3202MR
2SC4919-S
41
TM-281A
LEVEL DIAGRAM
Receiver Section
Center Frequency 49.95MHz 450kHz
W : –80.5dBm
N : –78.0dBm
W : –123.5dBm W : –120.0dBm W : –103.5dBm W : –107.5dBm W : –109.0dBm W : –97.0dBm CF501
N : –123.5dBm N : –120.0dBm N : –104.0dBm N : –108.5dBm N : –109.5dBm N : –96.0dBm /CF502
Q505 Q504 IC501
XF501 Q503
G2 D G2 D
ANT 20
BPF BPF
G1 S G1 S
To make measurements in the RF section, connect the RF level meter
In the RF section, use a 0.01μF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINA
Transmitter Section
TX-RX Unit
(Display) TX-RX Unit TX-RX
W/N
4.5mVrms (2.0mVrms for M4-type)
W/N W/N W/N W/N W/N W : 0.63Vrms W : 0.36Vrms
0.11Vrms 1.62Vrms 1.32Vrms 1.46Vrms 1.19Vrms N : 0.31Vrms N : 0.18Vrms
MIC IC703 IC703 IC704 IC704 IC706 IC706 IC705
Q6
2 1 6 7 3 1 5 7 2 1 9 8 9 10
To make measurements in the AF section, connect the AC level meter.
AG is set so that MIC input becomes 3kHz/1.5kHz (Wide/Narrow) DEV at 1kHz MOD. To make
42
TM-281A
LEVEL DIAGRAM
450kHz Audio Frequency
W : –84.5dBm
N : –84.5dBm
CF501 W/N W/N W/N W/N W/N W/N W/N W/N
/CF502 0.54Vrms 0.45Vrms 0.42Vrms 0.45Vrms 0.47Vrms 10mVrms 0.70Vrms 0.64Vrms
IC501 IC709 IC709 IC709 IC709 IC705 IC715
Q706
11 9 8 12 14 3 1 5 7 13 15 10 1 J1
8ohm
vel meter.
12dB SINAD.)
To make measurements in the AF section, connect the AC level meter.
(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow))
The AF output level is adjusted for a 0.64V/8Ω by the front panel AF VOL control.
Power
TX-RX Unit (VCO) TX-RX Unit Module TX-RX Unit
65W: K,M2,M3
3.5dBm –10dBm –3.7dBm 4.0dBm 17dBm 25W: M4
IC2 Q303 IC302
Q6 Q9 Q10 D306/
D9 D D307
2 7 1 4 ANT
G S
C60 C62 C67 C72 D10
To make measurements in the RF section, connect the RF Wattmeter (50Ω).
43
TM-281A
SPECIFICATIONS
GENERAL
Frequency Range
TX .................................................................................. K,M4: 144~148MHz M2,M3: 136~174MHz
RX ................................................................................. K,M2,M3: 136~174MHz M4: 144~148MHz
Mode ................................................................................ F3E (FM)
Antenna Impedance ......................................................... 50Ω
Usable Temperature Range .............................................. –20°C~+60°C (–4°F~+140°F)
Power Supply ................................................................... 13.8V DC±15% (11.7~15.8V)
Grounding Method ........................................................... Negative ground
Current
Transmit (max.) ............................................................. K,M2,M3: 14A or less M4: 8A or less
Receive (at 2W output) ................................................. 1.0A or less
Frequency Stability (–20°C~+60°C) .................................. Within ±2.5ppm
Dimensions (W x H x D projections not included) ............ 160 x 43 x 126 mm / 6.30 x 1.69 x 4.69 in
Weight .............................................................................. Approx. 1.13kg / 2.5lb
RECEIVER
Circuitry ............................................................................ Double conversion superheterodyne
Intermediate Frequency (1st / 2nd) .................................. 49.95MHz / 450kHz
Sensitivity (12dB SINAD) .................................................. Wide: 0.18µV or less Narrow: 0.22µV or less
Selectivity
–6dB .............................................................................. Wide: 12kHz or more Narrow: 10kHz or more
–60dB ............................................................................ Wide: 30kHz or less Narrow: 24kHz or less
Squelch Sensitivity ........................................................... 0.1µV or less
Audio Output (8Ω, 5% distortion) ..................................... 2W or higher
Audio Output Impedance ................................................. 8Ω
TRANSMITTER
Power Output
High............................................................................... K,M2,M3: 65W M4: 25W
Low ............................................................................... K,M2,M3: Approx. 25W
Modulation........................................................................ Variable reactance modulation
Spurious Emissions .......................................................... –60dB or less
Maximum Frequency Deviation........................................ Wide: ±5kHz Narrow: ±2.5kHz
Audio Distortion (at 60% modulation) .............................. 3% or less
Microphone Impedance.................................................... 600Ω
Note: All specifications (General, Transmitter and Receiver) are guaranteed within the
amateur radio band.
Guaranteed frequency range ............................................ 144~148MHz
2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan
P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
CA 90801-5745, U.S.A.
Via G. Sirtori, 7/9 20129 Milano, Italy
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
Carretera de Rubi, 88 Planta 1 A 08174 Sant Cugat del Vallès
Rembrücker Str. 15, 63150 Heusenstamm, Germany Barcelona, Spain
Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium Talavera Business Park Building A, 4 Talavera Road,
North Ryde NSW 2113 Australia
L’Etoile Paris Nord 2, 50 Allée des Impressionnistes,
Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Suite 2504, 25/F, Tower 2, Nina Tower, No. 8 Yeung Uk Road,
Tsuen Wan, New Territories, Hong Kong
KENWOOD House, Dwight Road, Watford, Herts.,
WD18 9EB United Kingdom 1 Ang Mo Kio Street 63, Singapore 569110
A B C D E F G H I J K L M N O P Q R S
1 TM-281A PC BOARD PC BOARD TM-281A 1
TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION
-10: K -21: M2 -22: M3 -23: M4 -10: K -21: M2 -22: M3 -23: M4
Component side view (J79-0316-09 A/2) Component side view (J79-0316-09 A/2)
2 2
C838
ANT
Ref. No. Address
IC302 3K
3 IC303 8P 3
IC707 9F
IC302
IC708 7E
IC711 6G
IC712 7F
4 4
IC715 9B
D
C418
Q502 11N
C417
C822
1 2 3 4 Q506 8R
Q714
D314
F701 D313 Q702 7F
C409
C408
G
C412
R377
5
C422 Q703 7F 5
R378
C826 +B C416 Q704 10I
FB
R821
Q705 10I
TH703
C817
R820 C828 GND
L312
C833
C835
Q706 10I
Q713
C356 L313
R336 C355
C345 Q707 6F
C348
R337
C338 C350
6 L314 C354 Q708 10O 6
R809
R824
Q707
D710 D712 Q710 10O
C801
IC711
BSB
C815 TEMP1 R828
O R762
R825 Q712 10E
IC712 C407
C832
C830
I R756
Q703 TEMP2 R829 Q713 6D
O
I
C814
G Q702
C810
Q714 5E
CN501
C776
R822
R770 C767
R757 R758 C763
1 8 C766 C764
D316
7 8T
Q715 9D 7
R771
D301
IC708
X701
C775
R774
R737
C749
C806
C394
R341 D301 7O
C850
C772 R759 R334 C395
R826
R769
R765
R761
R338
C347
R739
C753
C774
R772
C333
1 R559
C334
C342
4 5 1 8
C771 D305 8P
IC303
R344
R348
R754 R339
UL 8C
25 1 4 5 R345 D312 8Q
R342
R778
26 100 RESET C70
R340
TD1
R351
CNVSS R347
C401 R558 D313 5Q
8 R777 RD1
D312
8
D305
C577
C761
SCLK
D314 5R
C834
L702
R842 BUSY 5C
Q506
R748 5M
C579
G
S
R844
D316 7Q
D
R843 R780 R776
R783
R751 R2
R749
R752
R753
R775
TXD R557
D501 12K
R779
R750 R3
C572
C778
IC707 R4
RXD
IC715 R823 EPM
D502 12K
Q715
C820
9 CE D503 11O 9
R835
D504 10O
C827
R836
C779
D710 6F
R841
R773
50 76
R837
C824 51 75
C851 D712 6F
Q704
PC/TV R838
R782
R535
G
S
D504
R815 C769 C765 R760 R755
R784
8R
R817
R785
C809 C805 C768 R786
Q705
C575
Q708
R763
Q710
D
10 R787 R812 10
G
S
Q712
R529
ADJ
R813
C816
R819
R818
GND C783 R792
R768
R767
R766
R764
10 C777
Q706 C552
TH501
CV R527
R795
R526 C559
C789 C807
D503
C565
R791 SQIN C534
DTMFIN R793
R833
R832
C781
C782
AFV
C525
R521
11 GND 11
C556
C544
C718
C720
C702
C703
C719
C848
C530
C524
POWER RSSI
R520
C523
R519 GND BPF
R503 C515 Q502
C713
R703
R702
R704
R705
R707
R708
R706
R834
R701
C508
C586
D501
R507 R505
R508 C514
GND 22
C509
R504
C584
SPGND 1
12 12
SPGND
SPOUT
SPOUT
8C
RXD
PTT
VOL
MICKEY
5C
CM
ENCA
ENCB
DI
DO
CE
CL
BRI
POWER
MIC
ME
C585
R506
C587
R509
J79-0316-09 A/2 CN702
D502
Component side
Layer 1
13 Layer 2 13
Foil side
14 14
A B C D E F G H I J K L M N O P Q R S
1 TM-281A PC BOARD PC BOARD TM-281A 1
TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION TX-RX UNIT (X57-8130-XX) (A/2): TX-RX SECTION
-10: K -21: M2 -22: M3 -23: M4 -10: K -21: M2 -22: M3 -23: M4
Foil side view (J79-0316-09 A/2) Foil side view (J79-0316-09 A/2)
2 2
Ref. No. Address
IC1 9I
J701 IC2 8F
EXT. SP
IC501 11F
C839
R380
3 IC703 11M 3
L316 C421 +
IC704 11L
IC705 9K
IC706 12K
L320
D714
C823 IC709 10K
C420
TH702 IC710 8J
R831
4 C415 IC713 6O 4
IC714 8M
L319 Q1 10I
Q2 10I
Q3 8G
C836
C413 C410 Q4 10H
5 5
C406
C405
Q5 9F
+
C847
Q6 9F
C340
Q7 9F
C404 C365 Q8 10F
L318
Q9 9G
C343
C837
Q10 8F
6 I 6
C344
D309
Q303 7H
D306
D307
L317
C399 C397
D311 C400 IC713 G Q501 11H
R333
R332
R349 C402
C328
C330
Q503 11E
S Q303
L315 O
C332 R331 Q504 10C
D
R346 L310
L308
C403 C312
C309
C310
Q505 10A
C818
C825
R350
L309
C306 C829
7 R304 C308 L302 L305 Q701 12M 7
R312
Q711
R307 R314 C329
R326
C318
R811 Q709 7I
C849
C331 R781
C853
Q709
R816 Q711 7I
R814
R560 C854 D1 10I
C811
C581 4 3
D2 8I
C578 R44 IC710 R827 D3 10G
Q10
C68 R42
R43 C69
C11
C804
8 L515 8
R45
C71
L21
C17 C18
1
C840
C844
R18 R8 5 O D4 10F
R556
D9
R17
C64
C66
L19 C802 I
C21
C28
C574 C72 R41 C15 C727 R719
L3
R22 D5 10G
C62 C63
C67 G
C12
C831
D509 R46 5 4 R16 C729
C576
C61
C14 R7
D10
L20 C758 IC714 D6 10F
C65
IC2
Q3
C20
D2
R555 C808
C60
C573
R40 R718
R554 8 1 C747 D7 9F
C10
R5
L18 C751
C1
C9
C48 C743 +
1
10
D508 C571 R37
D8 10F
Q9
C57
R38
1 5
R1
D7 R24
R25
R26
C59
Q7
R34
L514 IC1 D9 8E
C34
L10
R35
24
13
3 4
9 9
C55
L2
R30
C46 C41
C570 C50 X1
L17 D10 8E
11
20
L1
R28
R27
Q5
G
C54
S
R553 L16
D
C568
L13 IC705
D
S
G Q6
C49 D306 6B
C52
C569 R552
L11
L14
C6
R29
L12
R6
C567 C43 D307 6C
R11
D
S
G Q4
C3
C4
C7
C51
C45
12
R33
Q505 D G2
S G1
1
R551 R13
D1
C42
R545 R547
Q8 GND
D309 6A
C58
C5
R550 C535
TC1
C38
C39
Q2
L15
R528 D8
R32
C566 TC2 ADJ D311 6A
R744
R743
R10 R745
C29
C27
C25
C546 R532
R15 C23
R549
Q1
R725
D4
R790 C786
10 C757 D505 11B 10
C53
R31
C549 L508 +
C36
C562 R546 L512 + + + C784 C785 R797 R727 R726 C738 C735
R12
Q504
C550 R537 R538 C35 L9 L8 C793
R541 R540
C561
R799 R802 C799
D506 11B
C56
R710
C797 R807 R800
C794
R805
R539
R711
L5 R20 R19 1 14
D3
C551
R542
R728
C754
C724
C16
R23
R9
C787
D G2
S G1
D5
L6
C560 C555 C548 D6 R21 D508 9A
L7
IC709
R806
R789
C557 C558
C547
R544
C742 R730
C748
L510 CV D509 8A
5
C798
C788 R810
L511
C545 C538 R801
R794 R808
C554 C553 D702 12N
R738 R740
R722
7 8
1
R536 C541 IC703
C537
L507
D506
R796 C800
R830
D505 C795 IC704 D704 12N
C790
L506 C502 R804
R534
C517
C506
R502
R543 C518 R511 C513 R803
11 R515 11
L502
4
C520
R512
8
D711
C796
D705 12O
C521 C522 R514
C582 R510 C516 C731
Q501
C539
C519
R524 L504
C750
9 8 C752 D706 12O
C745 R723 R724
R746
R742
L503 C736 C725
R715
L701
8 7
R721
C732
C734
R531 XF501 Q503 R501
R735 C746
GND BPF C505 C737
C533
R525
C503 C504 C722 D708 12M
L505
IC501
C507 C739
IC706
R522 C527
R717 C726 R714
R523 D709 12M
(NARROW)
C733
C821
C528 R747
C583
R734
R733
R729
C740
R741
CF502
Q701
16 1 14 1 D711 11L
D702
D704
D706
D705
D709
CF501 R736 C728
D714 4M
CD501
C511 C744
12 (WIDE) R716 12
C510 R517 R713
D708
J79-0316-09 A/2
Component side
Layer 1
13 Layer 2 13
Foil side
14 14
A B C D E F G H I J K L M N O P Q R S
1 TM-281A PC BOARD PC BOARD TM-281A 1
TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION
-10: K -21: M2 -22: M3 -23: M4 -10: K -21: M2 -22: M3 -23: M4
2 Component side view (J79-0316-09 B/2) Component side view (J79-0316-09 B/2) 2
J79-0316-09 B/2
3 3
Ref. No. Address
S901
VR901
ENCODER D903 6K
D904 6G
D910
D906
D909
D907
D908
D911
4 D905 6O 4
D906 4F
D907 4G
D908 4H
D909 4I
5 D910 4L 5
8
CM 7 D911 4J
HOOK
MIC
ME
J901
6 PTT 6
GND Component side
8C
Layer 1
D904
D903
D905
CALL VFO MR REV FUNC
2 MBL
Layer 2
1
Foil side
7 7
TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION TX-RX UNIT (X57-8130-XX) (B/2): DISPLAY SECTION
8 -10: K -21: M2 -22: M3 -23: M4 -10: K -21: M2 -22: M3 -23: M4 8
Foil side view (J79-0316-09 B/2) Foil side view (J79-0316-09 B/2)
D901
9 9
MBL
8C
C901
GND
PTT
SP– Ref. No. Address
ME
IC901 12K
10 MIC 10
D902
Q901 11F
R914
R915
HOOK
SP+
CM R916 Q902 11F
Q901
Q902
Q903 11G
R905
R906
R921
R920
R904
R919 Q904 11F
R918
R922
B
R923
R924
CB
11 Q904 E 16 1
D901 9D 11
CP901
CB C Q903
C929
R917
17 64 D902 10D
E
C902
C903 C928
R913
C926
R910
R901 R911
R909 IC901
C915
R912
C927
C922
C920
R908
C921
L901
12 CN901 12
MICKEY
POWER
SPGND 1
SPGND
C924
SPOUT
SPOUT
ENCA
ENCB
GND 22
RXD
VOL
MIC
PTT
CM
BRI
R903
R902
ME
DO
CE
8C
5C
CL
DI
32 49
33 48
Component side
Layer 1
C912
C916
C918
C917
C910
Layer 2
13 Foil side 13
J79-0316-09 B/2
14 14
TX-RX UNIT (X57-8130-XX)(A/2) : TX-RX SECTION IC302
TX-RX UNIT (X57-8130-XX)(B/2) : DISPLAY SECTION
RF_OUT
RA60H1317M231
INT SP LCD
RF_IN
R9 R:5.00V X57-8130-XX R766 R767 R768 POWER MODULE
VGG
VDD
470 RX VCO
Q1,2 CV D3,5
-10 K 0 0 0
1000p
R:0.73V
R12
5.6k
C16
SWITCHING BUFFER AMP D9,10 + SPOUT
1
OSCILLATOR
2
VCO T:0.72V
4
R:6.03V R:4.82V
1000p
FREQENCY RF SWITCH T:5.55V
220p
R23
C49 4.5p Q9 RF AMP T:4.76V -21 M2 NO NO NO
C66
10k
C64
D1 R10 R:5.96V
Q1
CONTROL R:5.85V
Q4
R:1.07V 2SC5108(Y)F
1 8 R:2.51V Q10 D9 HSC277 R307 C308 L302 L305 T:7.67V 65W:4.29V
25W:3.43V
- SPGND
8.2k L6 C36 C54 VCC1 VCC2 C72 -22 M3 NO NO DRIVE AMP D306,307 ANT
HZU5ALL 2SA1832(GR)F R15 R19 R21 L5 D5 L12 MCH3914(7)-H 2SC5108(Y)F 0 D306
VOLTAGE Q2 C60 C62 2 7 C65 C67 0 1200p 22n 10n Q303 ANT SWITCH L407CDB C405 C413 C420
0.022u
1k 2.7k 1.5k 270n HVC359 33n IN OUT 18p
1000p
1000p
0.3p
100p
R:5.59V
L309
30p -23 M4
C329
C331
NO RD00HVS1-T113
120n
C345
C348
C354
22p
DROPPED R11 2SC4738(GR)F MR VFO CALL
27u
L15
27u
0 0 T:2.71V
R336
L13
6p 3 6 R:1.81V
470p
2p 1000p 18p
R332
47
C23
C39
D10 HSC277
8p
C312
2p
R304
C310
120k
10
C309
IN SW2 1000p 4p
5p
R35
HVC359
33n
12p
1k
R20
L18
6p
8p
0.047u35
R4 1k D307
1k
C45
10k
270n
R350
D3
STRIP LINE
2.2k
C546
R46
L8
1p
4 5 R528 R532
0.1u35
R13
10k
L317 L407CDB C406 L319 L320 R380
C25
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
R3 1k GND SW1 ENCODER
C29
C71
39p
C51
L21
39n
COM3
COM2
COM1
COM0
R32
1000p
1000p
100
220
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
C68
R45
C61
R40
100n
L20
ANT
TC2
8.2k
R41
470p
C42
10
R43
R42
C63
100
C332 R331
6p
L308 L310
1.5u16
10k
3p
1k 0 27p
1k
R2 1k
R312
1.5T 5T 5T 0
4.7k
1000p
L315
C27
S901
470p
D901
9.5T
T:1.58V
100
C57
R38
8.2n 47n
C421
150p 10
C410
C417
C404
C415
0.5p
22p
IC2 W02-3704-05
L316
18p
C306
R:6.91V
18p
9.5T
18p
C365
L314
20
19
18
17
16
15
14
13
12
11
1000p
L312
L313
REVERSE
1000p
6p
C338
R333
REV Func
R337
13p
C330
UPB1509GV C901
100p
C328
100p
100p
2.5p
100
L318
C4
C7
C3
T/R SWITCH
100
CONNECTION
5T
1000p
C535
R29
L508
47n
1000p
CLOCK
R
NC5
P
FOUT
NC4
FC
LE
DATA
NC3
R326
C408
C318
0.01u
C397
DIVIDER PROTECTIOM
1000p
R346
R349
C399
12k
PLL IC
0.5p
0.1u
220
R37
470p
220
C59
R314
C69
1000p
470
22k
R44
0
100
IC1 Q5 Q7
L19
R5 TCXO D901 R901
OSCOUT
MB15A02PFV2E1 T:6.77V 2SJ347F UMC4N
R28 L17
OSCIN
10k X1 0
GND
1SS355
VCC
JDP2S12CR
JDP2S12CR
NC1
NC2
1000p
D313,314
FIN
220
DO
C70
R34
VP
LD
C1
1000p
100p
C409
C340
C343
R:6.85V
1000p
220p
C344
C350
C355
C356
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
C902
C903
0.1u
47p
22p
C418
0.1u
4p
R30
100k
5C
8C
8R
1000p
D4,6 APC VOLTAGE
D311
0.01u
R902
C48
4p
1000p
VC
C402
C400
D309
+DC TX VCO
C403
1k
R905
R906
27p
DETECT
R904
1
2
3
10
22u
1000p
SEG31
SEG30
VCO
SEG29
SEG28
8T
NC
NC
NC
KS2
KS1
COM3
COM2
COM1
COM0
NC
NC
NC
B
C6
16.8MHz C50
0
4.7k
0
0
FREQENCY
L1
T:3.68V 10p D313 D314 D702,704-706 49 32
470p
CONTROL
C20
RF AMP T/R SWITCH
100k
R1
GND T:0.77V HSB88AS-E HSB88AS-E NC
8CL
SURGE ABSORPTION
0.1u
OUTPUT C9 BPF
8R
8R
8R
Q6 SEG27
1000p
8T
C549
Q3 R:0.71V D6 C35 L11 50 31
8T
C21 2SC4649(N,P) L7 82p MCH3914(7)-H R550 D309,311 KI1
R16 HVC359 47n C55 R560 5M 7.56V SURGE SEG26
L2 R:7.07V J901
C582
L77-1944-05 C14 ANT SWITCH ABSORPTION 51 30
1p
270n R:2.48V 8
R537
C41
R:4.84V 10k KI2
C552
0.5p SEG25
1SV278F 0.5p
1000p
1000p
470p 0 CM
1000p
1000p
C575
0
C550
R540
C569
10u
470k
27u
27u
10p
C38
C15 L71-0655-05 R903 52 29
L16
HOOK
47k
L14
R:4.93V 0.1u T:0V
HVC359
R:7.52V MIXER RF AMP
C52 11p
R:0.71V
R22
MIC KI3
22k
SEG24
270n
R552
XF501
C10
R:2.29V
UDZW6.2(B)
T:7.73V
68p
D4
47k
L9
Q504 Q505 APC CONTROLLER 4.7k 53 28
R551
10u D505,506 D508,509 ME
100k
1000p
C567
R7
MC2850
CK(CPU54)
10
DT(CPU53)
PLLE(CPU3)
1000p
1000p
DA2S101
C412
R377
C422
R378
D706
RIPPLE C527 R524 L507 NC
TC1
MC2850
R525 R531 3SK294-FP
TCXOMOD
3SK318 SEG23
D704
R:6.78V PTT
10k
10k
0.5p
R358
R33
470p
C46
IC303
10p
FRQO
D7
220k
0.01u
C43
D902
RIPPLE
100
FILTER R:3.20V RF BPF TUNING R:2.85V RF BPF TUNING 54 27
C17
GND
RB521S-30
D2
NJM12904RB1
1.5k
FILTER 5p 390k 270 100 390n NC SEG22
L3
8C
R6
390n
R17
L506
R334
D316
R:7.82V 4.96V
470
1000p
L505
Q8 C551 R542 C555 C560 R547 C568 C573 55 26
3.3u
MBL(Key A)
C394
C395
0.1u
R8
150k
R341
KTC4075E(Y,GR)
MC2850
IF AMP
MC2850
NC
D702
D705
R536 R:1.23V 100 1 VR901 LCD DRIVER SEG20
UDZ5.1(B)
D7 OSCILLATOR 100p 0 1p 1000p 0 100p 4p R908 56 25
1000p
R31-0662-05
R338
C533
C539
C333
D301
C334
150k
C342
20p
C537
100k R:4.94V
100p
20p
6p
C347
4.7u
560 VDD IC901 SEG20
470p
1 8 D316 CN702 CN901
0.1u
R553
VCO
DA2S101
C28
27k
R541
D506 C558
1000p
D505 C554
L512
33p
1000p
1000p
VCC 57 24
33k
24p
C11
C12
100
10u
C18
C5
0.1u
0.1u
C545
R545
330n
R31
C576
PT6554LQ
C53
MODULATION
4.7k
Q503 SPGND
C58
PROTECTION SPGND
C571
1k
D8
100p
18p
C915
L10 R27 VDD1
C921
18p
C920
2 7 1 SEG19
R539
1
1000p
R556
C547
C528
R522
C548
470p
0.01u
0.01u
100
180
KTC4080E-P
1000p
R549
C566
58
C910
1u
23
L510
150
C557
68n
1000p
L511
0
13p
C553
68n
SPGND
R344
SPGND
5p
100k
R534
3p
47k VDD2 SEG18
C541
1000p
2
1SV325F
C538
3 6 2
L514
1.5p
68n
0.01u
1SV325F
220
C574
1000p
C581
R18
C578 POWER 59
C570
22
1p
1000p
R546
R523
SPOUT
C34
C561
1SV325F
SPOUT
0
VOLTAGE
100
1SV325F
VSS
0
R:7.59V 4 3 3 SEG17
D508
5
D509
100k
R24
PROTECTION 65W:1.25V
R339
C758
RIPPLE VARIABLE 60
10u
33p VEE TEMPERATURE 21
R345
100k
39p SPOUT
10k
L515
68n
25W:0.77V SPOUT
22u16
FILTER RESISTOR OSC
C56
COMPENSATION 4 4 SEG16
8R 8R 61 20
8C
D312 R348 8C 8C 8C CP901
5 5 DO (to cpu) SEG15
R25 R26 8CL 62 19
C562
1000p
15k R703
100k
5C
8C
R342
C544
RXD
5C
R555
RXD SEG14
R543
R544
R554
RB521S-30 CE
1.5k
R351
100k
100k
100k
0.1u
47k 47k 6 6
47k
RXD
R347
PROTECTION
1.5k
1000p
1000p
C416
C407
1000p
C401
100 PTT 63 18
R702 PTT CL SEG13
TV R557 TV TV D305 PTT 7 7
64 SEG12 17
1000p
C916
C917
C918
UL(CPU21)
1000p
1000p
R704 1k 100 VOL
SEG11
VOL 1k x4
SEG10
C579
C565
100k DI (from cpu)
1000p
8 8
C556
SEG0
SEG1
SEG5
SEG7
SEG8
SEG2
SEG3
SEG4
SEG6
SEG9
1000p
1000p
PLLE(CPU3) VOL
1000p
C572
DA2S101
R340
MICKEY
NC
NC
NC
R705 1k MICKEY
BL
22k
MOD MICKEY 9 9 5.00V
R559 5C 5C 5C
Q506
10
11
12
13
14
15
16
10 10 L901
CN501
C747
R558
2SK1830F
10u
C577
27k
1000p
R707 CM CM
47k
PC/TV SWITCH CM 11 11
C924
0.1u
C922
R557
1000p
T:4.87V 1k R708 ENCA ENCA 5.00V
ENCA 12 12
DT(CPU53) DT(CPU53) DT(CPU53)
1000p
100k
C579
0 R706 ENCB ENCB
R913
56k
CK(CPU54) CK(CPU54) CK(CPU54) ENCB 13 13 R910 R911 R912
FRQO PC/TV PC/TV PC/TV PC/TV 0 DI DI
DI 14 14 10k 10k 10k
MIC MIC MIC MIC MIC DO DO
C928
680p
C926
C927
100p
100p
W/NO(EVOL2) W/NO(EVOL2) W/NO(EVOL2) W/NO(EVOL2) DO 15 15
CE CE
W/NI(EVOL1) W/NI(EVOL1) W/NI(EVOL1) CE 16 16
VOLO(EVOL15) VOLO(EVOL15) VOLO(EVOL15) VOLO(EVOL15) R834 CL CL
5C CL 17 17 LCD BACKLIGHT SWITCH LCD ILLUMINATION
VOLI(EVOL13) VOLI(EVOL13) VOLI(EVOL13) 1k BRI BRI
C751
BRI 18 18 7.81V Q903
1u
BRI BRI BRI BRI BRI
R718
R:2.21V D906 D907
1.5k
POWER POWER 2SB1132(Q,R) R922
8TC(CPU80) 8TC(CPU80) 8TC(CPU80) POWER 19 19
24
23
22
21
20
19
18
17
16
15
14
13
8RC(CPU76) 8RC(CPU76) 8RC(CPU76) R701 MIC MIC
330 B30-2337-05 B30-2337-05
1000p
KEY BACKLIGHT SWITCH
1000p
20 20 KEY ILLUMINATION
C929
C912
W/NO(EVOL2)
IC705 SPM(CPU51) SPM(CPU51) SPM(CPU51)
W/NI(EVOL1)
FRQI
FRQO
BLO
BLI
GND
RESET
VDFref
DO
2VOLI
MODO 2VOLO
1VOLO
1VOLI
0 D908 D909
0.047u
ME
0.047u
ME
1000p
1000p
1000p
1000p
M62363FP-F Q901
AMPSW(CPU52) AMPSW(CPU52) AMPSW(CPU52) 21 21 D903 D904 RT1P141U-T111 R923
1000p
R715
C727
C729
R719
R914
L701
GND
680
10u
GND
1.2k
R917
DIGITAL 22 22 330 B30-2337-05
3.9k
B30-2337-05
PC/TVO
PC/TVI
POTENTIOMETER 1k
W/NO
MODI
D910
BRIO
D911
C713
C718
C719
C720
C702
C703
W/NI
R:4.94V
VDD
D905
CLK
BRII
DAT
ENCA
ENCB
R924
LD
R915
DO
CL
CE
DI
R:7.04V
R918
8R
5C
8R
5M R763 330 B30-2337-05 B30-2337-05
820
1.5k
1
2
3
4
9
10
11
12
R501 L502 R502 D903-905
R916
0
18k
C505 B30-2337-05
0
R760
D906-911
C725
120k 330n BRIGHTNESS
C502
0.01u
100
47k
5C
0.1u
R755
47k
LED FUNCTION Q904
1000p
C559
R743 1k C768 68p AUDIO AMP LED
R920
SWITCH
R766
R767
R764
R768
1000p
C743
UMG3N
18k
5.00V R744 1k C765 R:0.71V L504 C507 IC715 Q902
0.1u R909
R745 1k C769 330n LA4600
1000p 0.01u RT1N141U-T111
L503
330n
DETECTION
C504
PROTECTION
R919
1k
R921
C506
100k
47p
56p
2.7k
1000p WIDE(CPU65) 10 9 8 7 6 5 4 3 2 1 DC SWITCH
Q501 D503
1000p
D504
R519
C722
R714
C524
0.1u
100k
10k
C738 R726 NARROW(CPU64) KTC4080E-P HSB88AS-E R526 DA2S101 R535
W:4.90V
C503
C530
50.4MHz
TRIPLER
270p
N:0V
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
0.1u 18k SQ ON:0V 0 0
R509
FM IC
0.039u
390k
C534
R529
R527
470k
C735 68p SQ OFF:4.94V
0
0.022u VOLO(EVOL15) C808 R818 R819 C816
47u16
NC
ENCA
ENCB
NC
DI(from LCD)
DO(to LCD)
CE
CL
NC
NC
WIDE
NARROW
ADJ
VSS
NC
VCC
DST4
DST3
DST2
DST1
NC
CK
DT
AMPSW
SPM
0.1u
4.7u
IC501
76 50
R506
R725 R728 1u 68k 12k 0.22u
C508
R730 UA31136L
1000p
R504
330u25
WIDE
R817
NC
C834
AFM
10k
R520
C836
470k
47k
10k
1000p
1u
C748
R773 R:5.00V R:3.20V
C583
MICMT(CPU77) MICMT(CPU77) 77 49
MODI(EVOL9)
CF501
TH501
R722 240k 82k 82k 1 16 R:1.02V
4p
MICMT
470k
NC IF SWITCH
R833
C824
C584 OSCIN
C827
C831
C585 MIXIN
-t
0
1.5k 78 48 0 D502 C523 AF MUTE
IF SWITCH 2
820p
C742
5C NC NC OSCOUT GND 15 R:0.45V
0.1u 0.1u
R517
47 D501 MC2858-T111 J701
1.8k
79
5
8
7
6
4
3
C514 0.1u 3 MIXOUT 5600p R815 Q712
R:5.00V 8RC NC MC2858-T111 14 Q502 SPM(CPU51)
N-REC
CD501
V+
80 46 2SC4617(S) DTC363EU
4.7k
R727
1000p
C805
C809
8TC NC 13
R508
330k
IC704
R832
IDC VCC
R710
1u
6.8k
CF502 N-DET
0.22u
15k
C525
R521
81 45 CE SQL AMP
0
C731
0.01u
R823
NJM12904RB1
1k
C515 0.1u 5
390
SPLATTER FILTER NC NC C586 C587 IFIN 12 EXT SP
1000p
C838
RSSI
OP AMP 82 44 R843 C522
C517 0.1u 6 11 AF MUTE
VCC
SBC CEFLS 5M 0.1u 0.1u DEC
W/NO(EVOL2)
SQIN(CPU93)
IFOUT
R503
PC/TVO(EVOL3)
MODO(EVOL10)
MICMT(CPU77)
TX/RX (CPU20)
HPF Q715
6.8k
83 43 47k
R507
EVLLD(CPU8)
R505
NARROW
PLLE(CPU3)
R:2.50V 7 27p
10k
10k
UL(CPU21) NC NC FILOUT QUAD 10 AMPSW(CPU52) RT1N141U-T111
PC/TV
8C 84 42
1
2
3
MOD
NC NC 8 9
1000p
R512
FILIN AFOUT
560k
330p
C752
C513
C820
R831
C754
R830
R753
10u
IC703 85 41
0
0
BSB
NC NC W:0V
R711
C724
NJM2100V-ZB 3900p
10u
5C
15k
R721 47k 86 40 EPM N:4.90V
R752
R835 R738 R740 R749
47k
OP AMP CM NC C516
87 39 R841
C734
C509
68k 68k 5.6k MCU C785 R797 C793
CM MICKEY2 EMPFLS 5M 330p
C521
1u
R748
0.01u
R736
10k
22k 47k
C750
C746
150p
88 38
0.1u
C757
IC707 C518 0.01u 2.7k 0.018u
10u
FB
R511
8T
BSB
0.039u
C732 MICKEY MICKEY NC RXD TXD OP AMP Q709,711
B
8T
R779
C786
30622MEP540GU T:7.72V
47k
Q701 89 37 IC709 Q711
22k DC SWITCH (8T)
C510
2SC4919-S C726 VOL NC R800
C511
100p
10u
VOL
0.01u
BA10324AFV
R510
2SB1694
R735
R829 90 36
270k
R750 1k R775
1k
R836 OP AMP R814
TEMP2 NC RXD R790 1 14 5.6k
R746
Q709
82k
0 DC SWITCH (SB)
R717
C733 R751 1k 91 35 1k
TH702
C745 IC706 R:13.8V
C849
1.5k
C823
RT1N141U-T111
C814
1000p
C787
TEMP1 PTT PTT 12k 2 13
100k
8200p
FILOUT FILOUT
0.01u
0.01u
10u
10u
C784
C794
BA10324AFV T:13.8V C822 1000p
0.1u R816
-t
92 34
R805
R807
39p R811 R:13.8V
5.6k
1M
AGC/ RSSI RXD BUSY R776 R780 3 12 8TC(CPU80)
1
R741
MIC MUTE R734 14 1.5k 47k C519 R514 47k Q714
33 W/NI(EVOL1)
150k
D709 R828 93 0 F701
R:0.76V 1SS372F SQIN TXD 5M 4 11 R:7.79V 2SJ645
220k 2 13 VCC VEE
0 94 32 R844 10u 4.7k B
C799
TH703
R837
4.7u
R716
C835
1000p
AVSS BSYFLS 5M 5 10
100k
3 SB 4A
R821
C817
R747
1/2Vcc 12
1000p
1000p
10k
C826
C761
47k
AFV
-t
95 31 VOLI(EVOL13) 8R
100k
R842
Z5W27V
100 E
0.1u
330u 25
1000p
DTMF IN CLKFLS R802 Q708,710 Q710
C851
C807
C833
D714
C839
C847
R777 6 9
10u
1000p
1000p
10u
C788
4
C781
C728
2.2u
0.01u
R:0.76V 8C 11 L702 96 30 10k 10k 8V AVR
2SB1694
R515
VCC VEE
4.7k
VREF RXD1 5M 7 8 47k DC SWITCH (8R)
R:7.81V 5 10 8R 8C
R799
1000p
C737
R789
C797
97 29 R812 IC711
220k
470k
R778
39p
R796
DETECTION Q708
18k
C828
AVCC TXD1 5M 5C TA7808F-NQ
R820
1000p
C798
220
6
0.22u
9
R742
R:4.94V RT1N141U-T111
120k
98 28 10k R783 C778 2.2k DC SWITCH (SB)
R729
R733
R838
120k
680k
C520
8C NC NC RX R813
1000p
2 1
R794
7 Q713
120k
8 27 SCLK 39k 1u 8RC(CPU79) OUT IN
DA2S101
99
R723
9.1k
RT1N141U-T111
D708
C779
R:3.35V NC NC RD1 R:3.34V C795 R801 47k GND REVERSE
0.1u
MIC MUTE
C806
C850
C810
C815
10u
10u
100 26 CONNECTION
0.1u
0.1u
TD1 3
C740
C744
R:1.47V NC EEPWP 0.22u 0 PROTECTION
10u
0.1u
1/2Vcc
EEPSDT
POWER
AF MUTE
BSHIFT
CNVSS
R:7.82V
RESET
EEPCK
EVLLD
TX/RX
DTMF
XOUT
TONE
1000p
R724
C736
C739
6.8k
PLLE
Q704 R791
GND
GND
10u
VCC
R806
R713
VSS
8C 5V AVR
0.033u
2.7k
820
XIN
INT
NC
NC
NC
NC
NC
NC
R782 120k
C790
UL
AFM(CPU50) 2SK3019
R784
8C R:5.00V
15k
IC710 R:7.82V IC713
1k R:2.19V Q706 5C XC6209B502P-G R:4.94V TA7805F-NQ
5
6
8
9
10
11
12
13
14
R761 15
16
R765 17
18
19
R769 20
21
22
23
24
25
5M R:3.22V
C777
0.47u
PLLE(CPU3) PLLE(CPU3)
C782
2SC2412K 5C
0.1u
CNVSS 5M 1
4
C789 2
47k
C848
C802
C804
R757
0.01u
R737 R739 OUT IN
C811
1k
1k
10u
10u
QT/DQT(CPU1) QT/DQT(CPU1) Q705
0.1u
47k
NC VOUT
R781
VIN
5M RESET EEPROM 2SK3019 GND
1000p
0.033u
C825
C829
C837
C818
C821
47k
22u
22u
10k 22k
0.01u
0.01u
150k
C753
R785
R786
4700p
C749
R793
0.01u
12k
91k
R772 R774 IC708 4.94V BUFFER
VSS
EX24064ASAS0A AF MUTE R:2.62V AMP
CE
EVLLD(CPU8) EVLLD(CPU8) 10k 4.7k 5V AVR
1800p
3900p
C775
R795
C774
TX/RX (CPU20) TX/RX (CPU20) 1 8
3
A0 VCC
5.6k
C853
C854
UL(CPU21) UL(CPU21) 2 7
22u
22u
C783
R792
5.6k
A1 WP
1u
LIMITER
R824
TX DTMF TX DTMF
R826
470k
3 5M
47k
6
XOUT(CPU11) XOUT(CPU11) A2 SCL D711
R803
3.9k
1SS372F
R754
XIN(CPU13) XIN(CPU13) 4 5 PROTECTION R:4.93V
47k
VSS SDA D710 IC712 IC714
BEAT R810
R759
120k
R787
R825
XC61CN4002MR XC61CN3202MR
390k
SHIFT POWER 5C R:4.56V
1k
SWITCH L78-1427-05 BEAT 15k DA2S101
R804
C776 1000p R:0V 3 1 3 1
1200p
C796
X701 SHIFT VIN VOUT VIN VOUT
12k
R770
R771
C771
R808
C800
Q702 C767
C772
1000p
C763
1000p
R758 SWITCH
15k
47k
D712 R809
0.1u
Q707 VSS VSS
0
2SC4919-S
R827
330k
R:5.98V
R822
330k
3p 0 3p RT1N141U-T111
1000p
C801
R756 R762 UDZW18(B) 470 2 2
C766
OVER VOLTAGE
C764
RSSI(CPU92) RSSI(CPU92)
5p
OVER VOLTAGE
5p
10k 10k DETECTION DETECTION
SQIN(CPU93) SQIN(CPU93) SQIN(CPU93)
Q703 DTMF IN(CPU95) DTMF IN(CPU95) DTMF IN(CPU95) VOLTAGE VOLTAGE
C840
C844
FB
C832
1000p
C830
2SC4919-S DETECTION
1000p
0.1u
0.1u
X57-8130-XX C726 C732 C734 R717 R721 R835 R836 R837 R838 BEAT SHIFT ON:4.87V SBC(CPU82) SBC(CPU82) SBC(CPU82) SBC(CPU82) DETECTION
BEAT SHIFT OFF:0V (INT) (RESET)
BSHIFT BSHIFT INT(CPU18) INT(CPU18) INT(CPU18)
-10 K 0.039u 1000p 0.022u 18k 750k 0 NO NO NO 1/2Vcc 1/2Vcc 1/2Vcc 1/2Vcc
RESET(CPU10) RESET(CPU10) RESET(CPU10)
-21 M2 0.039u 1000p 0.022u 18k 750k NO 0 NO NO
5M
5M
5M
5M
8C
-22 M3 0.039u 1000p 0.022u 18k 750k NO NO 0 NO
-23 M4 0.068u 680p 0.039u 10k 1M NO NO NO 0
TX-RX UNIT (X57-8130-XX B/2): Display section TX-RX UNIT (X57-8130-XX A/2): TX-RX section
Q3
IC1 2SC4649(N,P)
MB15A02PFV2E1
PLLE Fin RX: 136.000~173.9975MHz (K,M2,M3)
DT D306,D307 144.000~147.9975MHz (M4)
PLL IC AMP L407CDB
CK TX: 136.000~173.9975MHz (M2,M3)
UL 8C Q4 Q9 IC2 Q10 D9,D10 Q303 IC302 D309,D311
RD00HVS1-T113 RA60H1317M231 144.000~147.9975MHz (K,M4)
5C MCH3914(7)-H 2SC5108(Y)F UPB1509GV 2SC5108(Y)F HSC277 JDP2S12CR
16.8MHz Q1
5C RX RF TX/RX POWER
CHARGE 2SA1832(GR)F BUFF COMM DRIVE ANT SW LPF ANT
MIC VCO AMP DIVIDER SW AMP MODULE
TCXO PUMP Q2 AMP
TCXOMOD 2SC4738(GR)F
MICKEY 16.8MHz
8C
GND VR901 POWER X1 8CL 5C 8C 8T 8R 8T +B Vgg 8T
PTT/TXD R31-0662-05 L77-1944-05
VARIABLE RESISTOR VOL 5C LOOP CV 8CL SW TX/RX
ME D313,D314
MIC FILTER Q5 HSB88AS-E
2SJ347F POWER
RXD
CM Q7 1st Local APC DETECTOR
UMC4N 16.8MHz 185.950~223.9475MHz
D/A IC705(5/8)
CONV. M62363FP-F (K,M2,M3)
MR VFO CALL KS1 TX IC303
VCO Q6 193.950~197.9475MHz NJM12904RB1
8T TH702,TH703
Q501 (M4)
5C
MCH3914(7)-H KTC4080E-P TRIPPLER NCP18WF104J03
SP RIPPLE 8CL VCOMOD TEMP. TEMP1
8C 2nd_Local
FILTER DETECTOR TEMP2
SPOUT ENCA 50.4MHz IC501 Q503 Q504 Q505
SPGND MHz REV FUNC KS2 VCO oscillation frequency UA31136L KTC4080E-P 49.95MHz 3SK318 3SK294-FP
ENCB Q8
KTC4075E(Y,GR) RX: 371.900~447.895MHz (K,M2,M3)
W/NI IF IF
S901 D8 387.900~395.895MHz (M4) MCF MIXER BPF LNA BPF
W02-3704-05 DEMODULATOR AMP
DA2S101 TX: 272.000~347.995MHz (M2,M3) RSSI
ENCODER KI3 288.000~295.995MHz (K,M4) Q506
KI2 KI1 XF501 2SK1830F
5C 8R L71-0655-05 8R 8R
D503 Q502
2SC4617(S) RF BPF RF BPF D508,D509 SW
HSB88AS-E
TUNE TUNE 1SV325F
SQIN NOISE NOISE
VCOMOD DETECTOR AMP D505,D506
1SV325F
KI1 L72-1034-05
KI2 8R IC705(2/8) IC706(4/4)
KI3 KS1 CF501
KS2 IC705(6/8) D/A M62363FP-F BA10324AFV
(WIDE)
M62363FP-F CONV.
D/A DC
SW 450kHz SW CONV. AMP
IC901 DO D500 D502
LCD COM0~3 PT6554LQ CE 5C MC2858-T111 CF502 MC2858-T111
DISPLAY SEG0~31 TCXOMOD (NARROW)
LCD DRIVER CL 5C 8C
L72-0999-05
NARROW
DI IC706(3/4) BUFFER WIDE
5C BA10324AFV AMP
BL
IC705(1/8) IC709 Q706 Q704,Q705 IC705(7/8,8/8) Q712 IC715
SPGND 8C BA10324AFV LA4600
M62363FP-F 2SC2412K 2SK3019 M62363FP-F DTC363EU
SPGND BSB EXT
SPOUT D/A AF D/A SP
W/NI HPF MUTE MUTE AF AMP
SPOUT IC705(3/8) D/A CONV. FILTER SW CONV. SW
8C M62363FP-F CONV. 5C
DTMF
RXD
PTT/TXD 5C 8C DTMFIN 8C AFM 5C SPM
5C SPOUT
VOL
AMPSW SW SPGND
MICKEY
5C 5M
IC706(1/4) Q715
CM SUM RT1N141U-T111
ENCA BA10324AFV AMP
ENCB 8C BSB FB
BSHIFT PLLE
DI TX/RX EVLLD
DO DTMO, 8C SPM TXD IC711 Q714
Q701 TONE Q711 TA7808F-NQ 2SJ645 F701
CE AMPSW DT 2SB1694
2SC4919-S NARROW CK F53-0327-15
CL IC703 IC704 TEMP1 AVR
D708 WIDE DO 8T SW SW FUSE +B
BRI DA2S101 NJM2100V-ZB NJM12904RB1 MICMT CE TEMP2 8V
POWER 8TC CL RSSI
MCU SQIN E
8C D903~D905 MIC MUTE MIC SPLATTER 8RC DTMO Q709
B30-2337-05 SBC TONE DTMFIN RT1N141U-T111
ME SW AMP FILTER IC707
KEY BACKLIGHT GND 8TC SW SBC SW INT INT
30622MEP540GU
BL SW SW
MICMT 5C 8C Q710 Q713 IC712
INT MICKEY 2SB1694 RT1N141U-T111 XC61CN4002MR
Q902 Q901 RESET CM
RT1N141U-T111 RT1P141U-T111 AGC 8R SW
POWER VOL
D709 UL PTT
ENCA RXD Q708
D906~D911 1SS372F ENCB DI RT1N141U-T111
B30-2337-05 XOUT XIN OVER 5M AVR
8C 8RC SW 5V
IC705(4/8) VOLTAGE
M62363FP-F EEPSDT DETECT
LCD ILLUMINATION IC713
X701 EEPCK TA7805F-NQ
BRI SW SW D/A L78-1427-05 EEPWP 5M
BRI 8.000MHz INT SW FB
CONV.
5C AVR
Q904 Q903 5V RESET RESET
UMG3N 2SB1132(Q,R) EEPROM Q707
BSHIFT SW RT1N141U-T111
5C IC708 IC710 IC714
D712 XC6209B502P-G
Q702,Q703 EX24064ASAS0A UDZW18(B) XC61CN3202MR
2SC4919-S
Receiver Section
Center Frequency 49.95MHz 450kHz Audio Frequency
W : –80.5dBm W : –84.5dBm
N : –78.0dBm N : –84.5dBm
W : –123.5dBm W : –120.0dBm W : –103.5dBm W : –107.5dBm W : –109.0dBm W : –97.0dBm CF501 W/N W/N W/N W/N W/N W/N W/N W/N
N : –123.5dBm N : –120.0dBm N : –104.0dBm N : –108.5dBm N : –109.5dBm N : –96.0dBm /CF502 0.54Vrms 0.45Vrms 0.42Vrms 0.45Vrms 0.47Vrms 10mVrms 0.70Vrms 0.64Vrms
Q505 Q504 IC501 IC709 IC709 IC709 IC709 IC705 IC715
XF501 Q503 Q706
G2 D G2 D
ANT 20 11 9 8 12 14 3 1 5 7 13 15 10 1 J1
BPF BPF
G1 S G1 S
8ohm
To make measurements in the RF section, connect the RF level meter.
In the RF section, use a 0.01μF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINAD.)
To make measurements in the AF section, connect the AC level meter.
(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow))
The AF output level is adjusted for a 0.64V/8Ω by the front panel AF VOL control.
Transmitter Section
TX-RX Unit Power
(Display) TX-RX Unit TX-RX Unit (VCO) TX-RX Unit Module TX-RX Unit
W/N
4.5mVrms (2.0mVrms for M4-type)
W/N W/N W/N W/N W/N W : 0.63Vrms W : 0.36Vrms 65W: K,M2,M3
0.11Vrms 1.62Vrms 1.32Vrms 1.46Vrms 1.19Vrms N : 0.31Vrms N : 0.18Vrms 3.5dBm –10dBm –3.7dBm 4.0dBm 17dBm 25W: M4
MIC IC703 IC703 IC704 IC704 IC706 IC706 IC705 IC2 Q303 IC302
Q6 Q9 Q10 D306/
D9 D D307
2 1 6 7 3 1 5 7 2 1 9 8 9 10 2 7 1 4 ANT
G S
C60 C62 C67 C72 D10
To make measurements in the AF section, connect the AC level meter.
AG is set so that MIC input becomes 3kHz/1.5kHz (Wide/Narrow) DEV at 1kHz MOD. To make measurements in the RF section, connect the RF Wattmeter (50Ω).
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