VHF TRANSCEIVER

IC-H6

lcom Inc.
 TABLE OF CONTENTS

SECTION SPECIFICATIONS ........................................ . 1- 1

SECTION 2 OPERATING CONTROLS .................................. . 2 - 1 "' 2
SECTION 3 CIRCUIT DESCRIPTION .................................. . 3 - 1 "' 4
3-1 RECEIVER CIRCUITS ................................. . 3-1
3-2 TRANSMITTER CIRCUITS ............................. . 3-2
3-3 PLL CIRCUITS ....................................... . 3- 2- 3
3 -4 OTHER CIRCUITRY .................................. . 3 - 3- 4
SECTION 4 BLOCK DIAGRAM ....................................... . 4-1
SECTION 5 INSIDE VIEWS .......................................... . 5- 1
SECTION 6 MECHANICAL PARTS AND DISASSEMBLY ................. . 6 - 1 "' 5
6-1 DISASSEMBLY OF THE CASES ......................... . 6-1
6-2 DISASSEMBLY OF UNITS ............................. . 6- 2- 3
6-3 PTT SPRING ASSEMBLY .............................. . 6-3
6 -4 TOP PANEL CONSTRUCTION .......................... . 6-4
6-5 UNIT BOTTOM ASSEMBLY ............................ . 6-5
SECTION 7 MAINTENANCE AND ADJUSTMENT ....................... . 7 - 1 "' 9

7-1 MEASURING INSTRUMENTS REQUIRED FOR

ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7-2 PRELIMINARY CHECKS................................ 7- 2

7 -3 PREPARATION AND PROCEDURE BEFORE

SERVICING ........................................ . 7 - 2- 3
7-4 HOWTOCHECK ..................................... . 7 - 3- 5
7-5 BASIC ALIGNMENT PROCEDURE ....................... . 7-6"' 9
SECTION 8 BOARD LAYOUT ........................................ . 8 - 1 "' 3
SECTION 9 VOLTAGE CHARTS ...................................... . 9 - 1 "' 4
SECTION 10 TROUBLESHOOTING .................................... . 10 - 1"' 4

SECTION 11 IC SPECIFICATIONS ..................................... . 11 - 1 "' 3

SECTION 12 PARTS LIST ............................................ . 12 - 1 "' 4
SECTION 1 SPECIFICATIONS

GENERAL
Number of Semiconductors Transistors 43
FET 3
IC 5
Diodes 15 (not including diodes on the matrix board)
Number of Channels 6 programmable channels (Transmit and Receive frequencies are pro-
grammable independently for each channel)
Operation; Simplex, Semi-duplex
Channel Spacing 25KHz (5KHz increments frequencies are programmable)
Frequency Stability 0.001 Percent
Usable Temperature -20 Degrees C to 60 Degrees C
(-4 Degrees F to 140 Degrees F)
Antenna Impedance 50 ohms unbalanced
Power Supply Requirement DC 8.4 V; with attendant power pack I C-CM3, DC 7 to 12V negative
ground is acceptable
Current Drain at 8.4V Transmitting
At 2.5 watts output Approx. 700mA
Receiving
At max audio output Approx. 130mA
Squelched Approx. 25mA
Dimensions 116.5mm(H) x 65mm(W) x 45mm (D) without power pack
Attendant power pack, IC-CM3: 49mm(H) x 65mm(W) x 35mm(D)
Weight 510g including power pack, IC-CM3, and flexible antenna

RECEIVER
Frequency Range Specified 2MHz segment (5MHz with reduced specification) within;
150.005 ~ 155.000MHz
155.005 ~ 160.000M Hz
160.005 ~ 165.000MHz
165.000 ~ 170.000MHz
Receiving System Double-conversion superheterodyne
Modulation Acceptance 16F 3 ±7 .5KHz ( F3E 16KO)
Intermediate Frequency 1st: 16.9MHz
2nd: 455KHz
Sensitivity Less than 0.5µV for 20dB noise quieting
Less than 0.4µV for 12dB SI NAD
Squelch Sensitivity Less than 0.4µV
Spurious Response Rejection Ratio More than 60dB
Selectivity More than 65dB at adjacent channel
Intermodulation Rejection Ratio More than 60dB
Audio Output Power More than 300mW at 10% distortion
Audio Output Impedance 8 ohms

TRANSMITTER
Frequency Range Specified 2MHz segment (5MHz with reduced specification)
Output Power 2.5 Watts (4 watts with 10.BV battery pack IC-CM5)
Emission Mode 16F 3 (F3E 16KO)
Modulation System Variable reactance frequency modulation
Max. Frequency Deviation ±5KHz
Spurious Emission More than 60dB below carrier
Microphone Built-in electret condenser microphone
Optional speaker-microphone (IC-CM9) can be used

1- 1
 SECTION 2 OPERATING CONTROLS

TOP PANEL

@TRANSMIT/BATTERY INDICATOR----~ ...-----------·@CHANNEL SELECT SWITCH

d)ANTENNA CONNECTOR---- ~-----@SQUELCH CONTROL

(j) EXTERNAL MIC J A C K - - - - - ' -

@EXTERNAL SPEAKER JACK '--------@VOLUME CONTROL and

POWER SWITCH

FRONT PANEL REAR PANEL

l :1.

SPEAKER
@PUSH-TO-
TALK (PTT)-----4 MICROPHONE
SWITCH

@CHARGER CONNECTOR

@BATTERY CHARGE INDICATOR

2-1
(]) ANTENNA CONNECTOR
Connect the supplied flexible antenna. An external antenna can be used, using a BNC connector.

® TRANSMIT/BATTERY INDICATOR
Illuminates in the transmit mode. Also indicates the battery condition; during transmission. The
voltage of Nickel-Cadmium batteries drops rapidly just before they are exhausted, so when this
indicator goes out, be sure to immediately stop using it, and charge the batteries again.

@ CHANNEL SELECT SWITCH

Selects one of the programmed channels.

@) SQUELCH CONTROL
Sets the squelch threshold level. To turn OFF the squelch function, rotate this control completely
counterclockwise. To set the threshold level higher, rotate the control clockwise.

@ VOLUME CONTROL and POWER SWITCH

When the control is turned completely counterclockwise, the power is OFF. By turning the control
clockwise beyond the "click", the unit is turned ON and the audio level increases by further rotat-
ing it clockwise.

@ EXTERNAL SPEAKER JACK

When an external speaker (or an earphone) is used, connect it to this jack. Use a speaker with an
impedance of 8 ohms. When the external speaker is connected the built-in speaker does not
function.

(J) EXTERNAL MIC JACK

When an external microphone is used, connect it to this jack. See the schematic for the proper
hookup. When the external microphone is connected the built-in microphone does not function.
The IC-CM9 optional speaker-microphone can also be used.

Electret condenser microphone Dynamic microphone

Microphone
Microphone

R=20-30K.11
0 [_______..______! ~.
PTT SWITCH
PTT SWITCH

@ PUSH TO TALK (PTT) SWITCH

For transmission, press this switch and talk into the microphone with normal voice. The internal
microphone is of the electret-condenser type and provides good pickup for all voice levels.

@ CHARGER CONNECTOR
Connects to the output plug of the wall charger CM-25U/E or other 12V DC power source.

@ BATTERY CHARGE INDICATOR

Lights during battery charging.

2-2
SECTION 3 CIRCUIT DESCRIPTION

3-1 RECEIVER CIRCUITS

3 - 1 - 1 ANTENNA SWITCHING CIRCUIT
Signals from the antenna connector are fed to the antenna switching circuit through Chebyshev low-pass
filter consisting of L229, L230, C295, C297 and C298 in the PLL board.

The antenna switching circuit employs a quater wave switching circuit.

In the receive mode, switching diodes, 0216 and 0217 are turned OFF, and they make isolation against
the transmitter circuit and matching circuit, and the incoming signals are fed to the RF amplifier.

3 - 1 • 2 RF AMPLIFIER AND FIRST MIXER

The signals from the switching circuit are fed to the cascode amplifier 0101 and 0102.
The amplified signals are fed to the gate of the first mixer 0103 through the band-pass filter L102 -
L104, which reduces interference and intermodulation from out of the band signals.

To the source of 0103, a 140MHz signal* is supplied from the PLL circuit to convert the RF signals into
16.9MHz first IF signals. (*This frequency differs depending on the version, and it can be calculated by
formula; "Receive frequency" - 16.9MHz.)

The first IF signals are taken from the drain of 0103 and fed to the IF circuit.

3 - 1·3 IF CIRCUIT
The first IF signals from 0103 are fed to the matched pair crystal filter F 1101, then IF amplifiers 0104
and 0105.

The amplified signals are fed to IC101. IC101 is composed of the second localoscillator, second mixer,
limiter amplifier, quadrature detector and active filter circuits.

The second local oscillator oscillates 16.445MHz with X101, and is fed to the second mixer with the first
IF signals to convert into 455KHz second IF signals. The second IF signals are put out from Pin 3, and
fed to external ceramic filter F 1102 which has excellent selectivity, then fed to IC101 (Pin 5) again to
amplify and detect.
The detected AF signals are put out from Pin 9.

3 - 1 - 4 AF AND SQUELCH CIRCUITS

The detected AF signals are put 6dB/Octave de-emphasis by integral circuit consisting of R 117 and Cl 26,
and fed to AF power amplifier IC102 through the VOLUME control R1, to obtain enough power to
drive the speaker.

Noise components put out from Pin 9 of IC101 are fed to IC101 (Pin 10) again through the SQUELCH
control R2, which controls the squelch threshold level, filtered about 20KHz signal {noise) and put out
from Pin 11.

This signal (noise) is rectified by 0113, integrated by R135, R136 and C136, and turns 0114 ON and
turns OFF the regulator for AF power amplifier consisting of 0103, 0115 and 0116.

This reduces the current drain of the set, in the standby condition. When a signal is received, noise is
suppressed by the signal and turns 0114 OFF and the regulator is turned ON and supplies regulated
voltage to the AF power amplifier, and incoming signal can be heard from the speaker.
In the transmit mode, a voltage is applied to 0114 and turns it ON, and turns the regulator OFF the
same as in the standby condition.

3-1
3-2 TRANSMITTER CIRCUITS
3- 2 - 1 MIC AMPLIFIER CIRCUIT
Audio signals from the microphone are fed to the limiter amplifier, consisting of 0125- 0128, which
has 6dB/Octave response between 300Hz and 3KHz.

The output of the limiter amplifier is similar to rectangular waves and includes harmonics.
These harmonics are eliminated by the low-pass filter 0129, which cuts 3KHz or higher.
Filtered signals are fed to the VCO in the PLL board to make modulation.

3- 2 · 2 MULTIPLIER AND DRIVER CIRCUITS

The VCO oscillates a half of a transmitting frequency, thus the multiplier 0208 and 0209, multiplies it
two times to obtain 156MHz* transmitting frequency.

This 156MHz* signal is fed to amplifiers 0211and0212 through band-pass filter L219, L220 and L221,
L222 to obtain 200 milliwatts pure 156MHz* signal. While switching from receive to transmit, 0210 is
turned ON by the charged voltage of C269, until the charged voltage has been discharged, and this
function cuts the bias voltage of 0211,..., 0213. This prevents transmission of unwanted signals.
(*This frequency differs depending on the version.)

3 · 2 · 3 POWER AMPLIFIER CIRCUIT

The output signals from 0212 is fed to the power amplifier 0213, and amplified to 2.5 watts.
In the transmit mode, 0216 and 0217 are turned ON, and 0217 makes L228 have high-impedance and
0216 feeds the signals to the antenna through the low-pass filter.

3·3 PLL CIRCUITS

3 · 3 - 1 LOCAL OSCILLATOR CIRCUIT
The crystal oscillator 0206 oscillates 35.77625MHz* with X202 for receive, 40.00125MHz* with X203
for transmit, and the signal at two times this frequency is taken from the collector of 0207, and fed to
the mixer of the PLL circuit.
(*These frequencies differ depending on the version.)

In the receive mode, R+6V is applied to 0210 through R223, L211 and R227, and 0210 is turned ON
and selects X202.

In the transmit mode, T +6V is applied to 0211 through R224, L212 and R228, and 0211 is turned ON
and selects X203.

3 - 3 · 2 MIXER, LOW-PASS FILTER AND AMPLIFIER CIRCUITS

The output signals from the local oscillator circuit and the VCO signals fed through buffer amplifiers
0202 and 0203 are mixed by the mixer 0204. The output signals are fed to the low-pass filter to filter
out only the signals below 7MHz, then fed to 0205 to be amplified to proper drive level (more than
3Vp-p) of the programmable divider IC201.

3 · 3 · 3 PROGRAMMABLE DIVIDER CIRCUIT

The input signals at Pin 2 of IC201 are divided by the BCD input signals from the matrix board at Pin
3-14.

The programmable divider is also called the 1/N counter and the BCD value is N.
The relationship between the operating frequency and the divide number N is:

N (divide number of programmable divider) =

Receive (or Transmit) Frequency (MHz) - Local Osc Frequency (MHz) _
1000
0.005

3-2
 3- 3 - 4 REFERENCE FREQUENCY GENERATOR CIRCUIT
Reference frequency generator IC203 consists of a crystal oscillator and a highspeed divider. X201 oscil-
lates at 5.12MHz, which is divided by 2048. The 2.5KHz reference frequency is fed to phase detector
IC202. This 2.5KHz reference frequency decides the variation step of the PLL output frequency.

3 - 3 - 5 PHASE DETECTOR AND LOOP FILTER CIRCUITS

Digital phase detector, IC202, detects the phase difference of the pulse signals of the 2.5KHz reference
frequency and the output signal of the programmable divider, and proportionately puts out pulse signals
at Pin 3, which becomes high impedance when the PLL is locked.

Pin 4 is for detecting the lock failures and changes to ground level according to the phase difference of
the two pulse signals. When the lock fails, the pulse signal from Pin 4 is integrated by R202 and C215.
When the integrated voltage exceeds the junction voltage of 0214's base, 0214 is turned ON and then
0107 in the MAIN boards is turned ON.

The collector of 0107 is connected to the base of 0108, so the base voltage of 0108 becomes ground
level, and 0108 and 0106 are shut off to prevent transmitting unwanted signals.

The loop filter, consisting of R204, R205, R206, C213 and C214, converts the pulse signal from Pin 3
into a DC voltage and decides the response time of the whole loop.

The output signals are fed to tuning diode D203 of the VCO circuit as the control voltage for the VCO
frequency set.

3- 3 - 6 VCO CIRCUIT
The VCO (Voltage-Controlled Oscilator) is a Colpitts circuit using 0201, and oscillates in 70 - 80MHz
range.

The oscillator frequency is controlled by a DC voltage which is supplied from the loop filter to varactor
diode D203.

In the receive mode, R+6V is applied to D204's anode through L201, and D204 is turned ON and shunts
C220. Thus the free-run frequency of the VCO is lowered.

In the transmit mode, T +6V is applied to D204's cathode through D205 and L202, D204 is turned OFF,
and C220 is inserted in the oscillator circuit in series. Thus the free-run frequency of the VCO is
increased. In the same time, the VCO signal is frequency modulated by the audio signals from the
microphone which are applied to the gate of 0201 and varies 0201 's mutual conductance.

3 -4 OTHER CIRCUITRY
3 - 4 - 1 POWER SUPPLY CIRCUIT
The regulated 6V is supplied to the main circuits, so that the set operates under a stable condition with
as low power voltage as possible.

The power supply voltage is fed to the AF power amplifier through the squelch switching circuit and to
the 6V regulator consisting of 0117 - 0120 and zener diode D104. This regulated 6V is supplied to the
PLL circuit.

In the transmit mode, the base of 0123 is grounded through R 155, the microphone and the PTT switch,
and 0123 is turned ON. Thus 0106 and 0108 are turned ON and T +6V is actuated, and supplied to the
transmitter circuit. At the same time, T +6V turns 0112 ON, and the power supply voltage is applied to
the MIC amplifier circuit through 0112.

In the receive mode, 0123 is turned OFF and the bias voltage of 0109 ON. Thus the R+6V is actuated
and supplied to the PLL board to switch the local oscillator crystal and the driver transistors of the
transmitter circuit.

At the same time, R+6V turns ON the voltage boost circuit consisting of 0110 and 0111, and +6V is
supplied to the receiver circuit.

3-3
3- 4- 2 LED INDICATOR CIRCUIT
This LED is lit in the transmit mode, but when the power supply voltage becomes less than 7V, it will
not be lit.

The power supply voltage is divided by R148 and R149, and applied to the base of 0121. The emitter
of 0121 is connected to the regulated 6V source. When the power supply voltage is more than 7V,
0121 is turned OFF, 0122 is turned ON and T+6V is applied to the LED through 0122 and R150, and
the LED is lit.

3- 4- 3 DIODE MATRIX BOARD

The set incorporates a diode matrix board to determine its operation frequencies, and six channels each
can be programmed into the board for transmit and receive.

+6V is applied to each channel line, one of receive channels 1 - 6 and transmit channel 1 - 6, through
the channel select switch, and it is converted to BCD codes by diodes programmed into the board, then
fed to IC201 to determine an operation frequency.

When duplex transmit function is required, calculate each N value for transmit frequency and receive
frequency and program diodes into the board independently.

The receive only function is provided for channel 2 - Channel 6 by inserting a diode into the receive
only line. At this time, a voltage is applied to the base of 0107 on the MAIN board through R404, and
it turns 0107 ON and 0106 OFF. Thus, the set does not turn to the transmit mode, even if the PTT
switch is depressed.

Crystal Frequency Chart

Crystal Frequency (MHz) Local Oscillator

Operating Frequency Range
X202 (Receive) X203 (Transmit) Frequency (MHz)

150.005 - 155.000MHz 32.02625 36.25125 145.005

155.005 - 160.000M Hz 33.27625 37.50125 150.005
160.005- 165.000MHz 34.52625 38.75125 155.005
165.005 - 170.000M Hz 35.77625 40.00125 160.005

NOTE: The local oscillator frequency for calculation N value is the four times of the crystal frequency.

3-4
 16.9MHz 455KHz

,. RF Amp
0101
2SC2026
0102
'
r-+
1st Mixer
0103
2SK192
,. Crystal
Filter
F1101
16M15B2
~
1st IF Amp
0104, 0105 -
2SC2668 x 2
Ceramic
Filter
F1102
-
Noise
Detector
0113
~

r
Squelch
Control
0114, 0115
,___
en
m
(')
::!
2SC2668 CFU455E2 2SA1048 2SC2458 x 2 0
:z
f ~VCC ~ ~
.i::o
I v I
Indicator Regulator T/R Switch
~ -.j ~ Amp~ Squelch [ al

t
0106, 109, 111 ~R6V 2nd Mixer 2nd Noise r-
0117 2SK192
Control
0121, 0122 re-- 0118 2SB562
0119, 0120
rl> 116,112
2SA1048 x 5
0107,108,110
.,. IF Amp

AF Powoc -.aj 0
(')
;;i:::
2SA1048 x 2 2SC2458 x 2 ..L
~FM Detect
2SC2458 x 3 A,;>. Amp
...--/'¢.f""
~

....
~ t ~
2nd LO
4J r<rcJ
LED Power
6V T6V R6V X101
T IF IC
IC101 MC3357
Volume
IC102 BA526
Speaker
0
)>
G')
16.445MHz J:l
Switch )>
x2 Antenna s::

I
Multiplier
0209 ~
Buffer Amp
0211 ~
Driver
0212 -£;'.>
Power Amp
0213
2SC1947
f-l;i
RF
T/R Switch
D216, D217
llf-(;1I
Low-Pass

Filter
T
2SC2668 2SC383 2SC2053
1SS53 x 2
Battery Cl.
""'I Mute Switch
Pack "'7 X2 0210
Crystal Crystal OSC
PLL Mixer
2SC2458 ~
Low-pass
X202(R}*
X203(T)* 9-i)
l Switch
D210-D212 H> Multiplier
0206
-{> 0204
2SC2668
-j)
Filter
0214
2SA1048
1SS53 x 3 2SC2026
(*Refer to page 3 - 4) ~
X2 I 'i7
Microphone

D- -
Multiplier
0207
2SC2668
... Buffer Amp
0208
2SC2026
Buffer Amp
0202, 0203
2SC2668 x 2
l
0-{)
T
Oscillator
Divider
(1/2048)
IC203
TC5082
Level
Converter
0205
2SC945
Channel Switch
0

0
X201
Lf 1' 5.12MHz
2.5KHz
T 'i7
Mic Amp
Limiter
Low-pass vco Phase Programmable Matrix Board
0125· 126 Filter FM Modulator Detector Divider 0401
2SC2458 x 2 ~
0127
0128 ~ 0129
~ 0201 2SK192 (}- Loop Filter kl- IC202
<I- IC201
Fl- 2SA1048
0402
<I-
2SC2458 2SC2458 D203 1SV50 TC5081 TC9122 2SC2458
2SA1048

v......
Transmit mode
in
l
----~~ .. in Receive mode
-----1[> in Common mode
 SECTION 5 INSIDE VIEWS

MAIN UNIT

-
::--=:;----1c101 (MC3357 IF Circuit IC)

- : = - - - - - L 1 0 7 (Quadrature Coil)
::::::,,..-::::---Fl102 l455KHz Ceramic FHterl
X101 (16.445MHz 2nd LO Crystal)

Pll UNIT

.:.=:-----C291 {PA Output Trimmer)

r : - - - - - C 2 9 0 (PA Output Trimmer)

=:::=:;,=.,.:=----- L212 (X203 Frequency Adjust)

-~---------0213 {PA 2SC1947l
-=---- L211 (X202 Frequency Adjust)
~----C286 (Driver Output Trimmer)
X202 (PLL RX LO Crystal)------== .;;.o:;::-----C285 (Driver Output Trimmer!

L215 • L216 (PLL LO Output Filter!----"~

J201 • J202 (Matrix Board Connectors)---=-"~--4

lC201 {TC9122 Programmable Divider)---='-
i..,,..;::::::;;::;;:;.::;.-L203 (VCO Free-Run Frequency Adjust)
IC202 (TC5081 Phase Detector)----=-
IC203 (TC5082 Oscillator/Divider)---=- iiiiiirir----------VCO Circuit
X201 (5.12MHz Reference Frequencv--~
Crystal)
L217· L218 (RX LO Band·Pass Filter}---:

5-1
SECTION 6 MECHANICAL PARTS AND DISASSEMBLY

6-1 DISASSEMBLY OF THE CASES

1. Turn the power switch off and remove the power pack.
2. Remove two screws (('.) on the rear panel and four screws on the bottom as shown in the figure.

3. Remove the front panel as shown in the figure. At this time, be

sure not to damage the engaged parts at the top (circled with
dotted lines).
open the bottom slightly and slide the front panel down-
wards.

4. Slide the PTT Button upward, and then remove the rear panel.

6-1
6 -2 DISASSEMBLY OF UNITS

REAR PANEL FRONT PANEL

30283 30222
~__.,..,:;==;::>, PTT BUTTON
42289

M2 x 12
ifJRound head
Screw x 2

1. When you wish to program some operation frequencies (channels), remove the rear panel, then
unplug the connectors between the matrix board and PLL board, and tilt the matrix board as shown
in the figure.

When you wish to remove the matrix board from the set, unplug the two connectors located on the
front side end of the board.

When you wish to remove the

matrix board, unplug these connectors.

6-2
 To see the printed sides of the PC boards, open the chassis by removing two screws ©located above
and below· the PTT spring.

CHASSIS A, B
30284
©
Dmn----
M2x4l'B
Flat head screw 0
MAIN UNIT PLL UNIT
0
MAIN UNIT
(PARTS SIDE) (PRINTED SIDE) (PRINTED SIDE)
PTT SPRING

©
l)mi----111
M2x4C-f!
F lat head screw

~-,...-.....,.,,..~ CONTACT HOLDER~.....,.__,-~

CONTACT SPRING 41737
41750

6-3 PTT SPRING ASSEMBLY

(HOW TO REPLACE PTT SPRING)
1. The PTf spring is soldered at its top as shown in the figure.
2. Remove the old spring by heating the soldered point.
3. Solder the hole at the top of the new spring.
4. Make sure that the new spring is soldered on parallel to the chassis.

Soldered point
,,
, ''
,
, ,, ''
'
,/ '

PTT
Spring
41746

6-3
 6-4 TOP PANEL CONSTRUCTION

.--~~-.---~-KNOB

N-56
42037

BNC-RM--....i
©
i i
~ ~ VR NUT(A)
I T 42061

+--TOP PANEL [ Ib - T O P PANEL

- 30282

=.==1==~=== +--CHASSIS
======:::i.--CHASSIS A, B
WASHER lr.:1 ~ 30284
-WASHER

BNC NUT~ ~
LED
SLC-26UR
_l/ TOP PLATE
42062
(C-00964)

~-+------ R2 (SOL)
K12141014-5N1212
-10KB

~KNOB
~ N-55

2.5ql N U T ] 1 3 . 5 q l NUT
i 42036
~VRNUT(B)
I 42061

j b - T O P PANEL ~f~~T_o_P_P_A_N_E_L~_30_2_s_2~~-i--
======-t--CHASSIS A, B
.,.-..l__ WASHER A, B l
II CHASSIS30284
1r
J2 (EXT SP)
HSJ0296-01-150

~J3(MIC) HSJ0289-01-050

6-4
6-5 UNIT BOTTOM ASSEMBLY
(BOTTOM VIEW)

t;:::.========:=:=:=:=::::;:!\4---FRONT PANEL

.....---.----SLIDING GUIDE (A)

@ ~~~~~-'--+--1----CONT ACT HOLDER
©t>
@ ~~~g)J
1--------2====nr=r--i----CONTACT SPRING
~==================;r--- REAR PANEL

(HOW TO REPLACE CONTACT SPRING)

1. Remove the sliding guide by removing the four screws as shown.
2. Remove the contact spring by removing the two screws as shown.
3. Set the new contact spring so that the split of the spring is on the positive side and the other end on
the negative side.
4. Tighten the two screws.

~- ~
I

~ M2.6 NUT x 2

- -- - - - - - u - - - - - --
~~ !•I~
i ~
SLIDING GUIDE (A) 1~-.I ----- ~'t+-----;t~I CONTA;;-73~0LDER
41751

~
' I CONTACT SPRING
41750

f
SPRING WASHER
I
M2.6 x 6
Flat head
f, M2.6x 6 I M2.6 x 6
Screw x 4 "'·Truss head ~I 'r Round head
screw screw

6-5
SECTION 7 MAINTENANCE AND ADJUSTMENT

7 -1 MEASURING INSTRUMENTS REQUIRED FOR ADJUSTMENT

(1) FREQUENCY COUNTER FREQUENCY RANGE 0.1·180MHz

ACCURACY BETTER THAN ±1 ppm
SENSITIVITY 100mV or BETTER
(2) SIGNAL GENERATOR FREQUENCY RANGE 0.1MHz · 180MHz
OUTPUT VOLTAGE -20 · 90dB (OdB = 1µV)
(3) MULTIMETER 50Krl/Volt or better
(4) AC MILLIVOLTMETER MEASURING RANGE 10mV · 2V
(5) RF VOLTMETER FREQUENCY RANGE 0.1·180MHz
MEASURING RANGE 0.01·10V
(6) RF WATTMETER (Terminated Type) MEASURING RANGE 5 - 10 Watts
FREQUENCY RANGE 140 -180MHz
IMPEDANCE 50 OHMS
SWR LESS THAN 1.1
(7) AF OSCILLATOR OUTPUT FREQUENCY 200- 3000Hz
OUTPUT VOLTAGE 0- 200mV
DISTORTION LESS THAN 0.1 %
(8) OSCILLOSCOPE FREQUENCY RANGE DC - 15MHz
MEASURING RANGE 0.01 - 10V
(9) FM DEVIATION METER FREQUENCY RANGE 140- 180MHz
MEASURING RANGE 0- ±10KHz
(10) DIRECTIONAL COUPLER FREQUENCY RANGE 140- 180MHz
(11) AMPERMETER MEASURING RANGE 0-1.5A DC
(12) DUMMY LOAD OR EXTERNAL
SPEAKER IMPEDANCE 8 OHMS
(13) VOLTAGE REGULATED POWER
SUPPLY OUTPUT VOLTAGE 5"' 11 V DC (adjustable)
CAPACITY 1.5A OR MORE

7-1
7-2 PRELIMINARY CHECKS
7 - 2 • 1 TRANSMITTER OUTPUT CHECKS

50.Q
Power M.

Power
Supply
8.4Vor Battery (IC-CM3)

1. Connect a 50 ohms RF wattmeter to the ANT connector.

2. Setting the Set to any programmed channel and key the transmitter. Observe the RF power OUT-
PUT.

3. Power output should be 2.5 - 3.0 watts at rated input (power supply) voltage.

7 · 2 · 2 RECEIVER CHECKS
Make all checks at 8.4V DC Oscillo- Audio
scope S.G.
1. Settings of controls and switches V.M.
Power switch ON
Squelch Control Fully counterclockwise
Frequency Any programmed channel EXT SP o
JACK ,.,..._.i......w......,,,.,....
EXT.
SP.

Power
0
Supply
8.4V

2. Connect an AF voltmeter to the EXT SP jack and set the SOL control fully counterclockwise.

3. Connect the RF output of a VHF signal generator to the ANT connector.

4. Adjust the VOL control and the AF voltmeter range.

Adjust the VOL control for a full scale reading on the AF voltmeter. Don't change the VOL control
setting after this adjustment.

5. Set the signal generator to the receiving frequency and adjust the output level of the signal generator
until the AF voltmeter shows a 20dB decrease in reading.

6. The signal generator output voltage at this point is the 20dB quieting sensitivity.

7-3 PREPARATION AND PROCEDURE BEFORE SERVICING

1. Confirm defective operation and check to make sure setup or external sources are not the cause of
the problem.

2. Proper tools and measuring instruments are required for repair and adjustment. Don't try to repair
or modify without them.

7-2
3. Remove the transceiver case as shown on Page 6 - 1. Use a screw driver that fits the screw.

4. To open the hinge chassis remove the two screws as shown on Page 6 - 2.

5. Attach an 8.0 ~ 11.0V DC external power source to the battery clip or screw. Be sure to check the
polarity.

6. In the case of a transmission problem, a dummy load should be connected to the antenna connector.
In the case of a receiving problem, an antenna or signal generator is connected to the antenna
connector. Be careful not to transmit into the signal generator.

7. Recheck for the suspected malfunction with the power switch on.

8. Check the defective circuit and measure the DC voltages of the collector, base and emitter of each
transistor.

9. When checking a transmission problem, it is convenient to short circuit an accessory mic connector
plug and insert it, turning on the transmitter.

7 -4 HOW TO CHECK
7-4-1 RECEIVE
1. Check the frequency of P.L.L. unit when you are unable to receive with a strong signal present and
noise present when turning up the AF volume.

2. When no noise is present at the speaker, check audio frequency amplifier or 6V regulator first.

3. Inject RF through a O.OlµF capacitor from an FM signal generator modulated with 1 KHz audio
modulation (FM), to points (A) through (D) in order, check for receiver output.
(A) = Selected channel frequency
(B) = Selected channel frequency
(C) = 16.900MHz
(D) = 16.900MHz

4. Check (E) and (F) with an oscilloscope, for demodulated output in the audio frequency range.

A B c D E F G

,lv'\_,,,r:::-:i
~)mm illl.1
t 1:tt-31H

(0)

7-3
7 - 4 - 2 TRANSMITTER
1. Check (A)"through (G) in order with RF voltmeter.

2. When the transmitter output is low, check regulated power supply voltage first, do not turn coil
trimmers.

3. When transmission is normal, RF is present and it is not possible to measure the DC voltage
accurately with a voltmeter.

(E) (F) (G)

,17\~·-·9
~ \i£iJZ09lD1
E 210

.. ·©"" \iii)

-~ "" \ill)

·©'::;@)

·©o~•M@)

'~""~

7- 4- 3 MODULATION
1. Put a signal into the EXT MIC connector (1KHz40mV) with an AF oscillator or an external mic.

2. Check the AF voltages (A) through (E) in order with an oscilloscope.

(A) (B) (C) (E) (D)

,r.7\,.,,,, ~
~104-5 \ii..il
r 101-e112
1>•-s11t-20

.0.,~,,,~
~111113\.lrn
E 12•-31?7

·® '""" CiiiJ
·~ "" (ii§)

·©'~"·@)

7-4
7 · 4 · 4 P. L. L.
1. Check (A) with an oscilloscope. A lock failure is indicated by an instability or absence of the wave
form. Check as follows:

2. Check the Frequency of the master oscillator (5.12MHz). If a 2.5KHz 5Vp-p squarewave is not
observed at (B). measure DC voltage on Pin 5 of IC203 if no oscillation.

3. Wave measure the output of (C) and (D) with an oscilloscope.

4. Measure DC voltage of 0201, 0202, 0203, 0204 and 0205.

5. If the transmit or receive frequency differs from the programmed frequency, check the voltage of
Al to C4 on the IC201 (BCD control lines from matrix board).

G
A B c D E

..

•~om

.Efj,,,,
. ·©
'

{A) (0)

7-5
7- 5 BASIC ALIGNMENT PROCEDURE
7-5-1 P.L.L. CIRCUIT
A. Lock Adjustment
1. Connect the measuring instrument and set the control knobs as follows:
•Connect an oscilloscope (15MHz band width) to R217.
•Connect voltmeter between R205 and ground.
•Set the channel select switch at a programmed channel (center frequency of the operating
frequency range is recommended).

Oscilloscope RF Frequency
Wattmeter Counter

Power '------+--o R21 7

Supply PLL
(8.4Vl R205

2. Procedure
When the circuit is operating normally, adjust coil L203. The P. L. L. will lock.
•Adjust the coil of L203, and the voltage of R205 varies between 0 ~ 6V, and P. L. L. should lock.
•Adjust L203 for 3V after lock.

Next, in Receive adjust L216 for maximum voltage (P-P value) on the oscilloscope and then
during transmission adjust L215 to maximum. Set the channel select switch at a high edge
channel, and repeat adjustment of L215, L216 several times. After that, confirm the following
voltage of R205 (both transmission and receiving)about 2V at a low edge channel and 4V at a
high edge channel, and that the voltage of R217 (both transmission and receiving) is over 2Vp-p
(over operating range of the radio). If the P.L.L. won't lock, check these voltages: R+6V, T+6V,
6V constant, and the P.L.L. LO and reference frequency oscillator for oscillation.

8. Reference Frequency Oscillator Check

1. Connect a frequency counter through a capacitor to Pin 1 of IC203.
2. Confirm frequency is: 5.120MHz ±250Hz.

C. P.L.L. LO Frequency Adjustment

1. Connection of the measuring instruments and the setting of knob.
•When adjusting the receiving frequency, connect the frequency counter to R257 through a
capacitor. After power adjustment, loosely couple the set to a frequency counter with capa·
bility of more than 180MHz (with dummy load connected), so that the transmitting frequency
can be obtained.

_ _ _.. Dummy Frequency

Load Counter

(TX) (RX)

Power
0
Supply R257
(PLL)
(8.4V)

7-6
 2. Set the channel select switch at a programmed channel.
•In the receive mode, adjust L211 for the programmed receiving frequency minus 16.9MHz.
•In the transmit mode, adjust L212 for the programmed transmitting frequency.
•Then check again, because these adjustments interact.

3. Confirmation
Check each frequency:
All frequencies should be within ±500Hz.

7 - 5 - 2 TRANSMISSION
A. Power Adjustment
1. Connection of measuring instruments and setting of the knobs.
•Connect ANT to 50 ohm power meter.
•Connect a voltmeter and variable power supply to the set.
CAUTION: Applying over 12V can damage the P.A. transistor.
•Set the channel select switch at a programmed channel.

2. Procedure
•Adjust L219 through L222 and C285, C286, C290 and C291 for maximum power output while
pushing PTT switch.
• If the total current drain exceeds 1000mA, adjust C291 to set the current at 1OOOmA, and
repeat above procedures.

3. Confirmation
More than 2.5W output, less than 1 OOOmA current drain.
No abnormality in operation should be found if the supply voltage is varied from 7.0V to 10.BV.

RF
wattmeter

Power
Supply

(7~11vl

B. Modulation Adjustment
1. Connecting the measuring instrument and the settings of the controls.

Connect a deviation meter to the ANT Connector with a directional coupler or attenuator.

Deviation meter filter shall be a High Pass Filter 50Hz, L.P.F. 20KHz. De-emphasis OFF.
•Set the channel select switch at a programmed channel.
•Connect an AF oscillator, with AF millivoltmeter in parallel, to the mic input.

2. Procedure
Mic input shall be 1KHz 120mV RMS. During transmit, adjust R171 on the main unit for
4.5KHz deviation.

7-7
 AF AF Dummy
Millivolt- Load
Oscillator
meter
Directional
Coupler

Deviation
Meter
Power
Supply
0
{8.4V)

3. Modulation check
Maximum deviation: With 1KHz 120mV shall be 4.5KHz ±10%.

Modulation sensitivity: Mic input voltage 12mV ±3d8 at 1 KHz. Deviation should be 3.5KHz.

S/N Ratio:
Connect the output of the deviation meter to a millivoltmeter. With no audio input to the mic
input, take the voltmeter reading. Now apply 1KHz40mV audio into the mic connector. Take
the voltmeter reading. The ratio should be greater than 40dB.

C. Spurious Transmission
Connect spectrum analyzer with appropriate attenuation. Confirm nearby random spurious signals
below fundamental frequency less than -60dB.

Measure the harmonic wave output, adjust R F-ATT until noise level just appears.

Should be less than -60d8 below the fundamental frequency.

7 · 5- 3 RECEIVER
A. LO Output Adjustment
•Set the channel select switch at a programmed channel (center frequency of the frequency range is
recommended). Adjust L217 and L218 for maximum output on an RF voltmeter attached to
R257.
•Then set the channel select switch at a high edge frequency channel and adjust L217 and L218
with the same procedure.
•Repeat above procedures to obtain the same reading on the RF voltmeter on either channel.
The output voltage should be about 200mV.

B. RF IF DET Coil Adjustment.

1. The connecting point of measuring instrument and the setting of the knob.
•Set the channel select switch at a programmed channel.
•Connect a signal generator to the antenna connector.
•Connect an external speaker and AF millivoltmeter to the EXT SP terminal.

2. Procedure
Set RF voltage meter (minimum range) to Pin 16 on IC101 in the IF, adjust l101 through L105
maximum output while setting the input from the signal generator as low as possible. Then vary
the input frequency from the signal generator ± 10KHz. Check if rippling (change in output
level) occurs. If ripple is over 3d8, readjust L105.

Set signal generator output to -80dBm to -90dBm and deviation to 3.5KHz. Set signal
generator frequency to speaker output maximum. After that, adjust L 107 for maximum output.

3. Confirmation
Sensitivity should be less than -8dBµ (0.4µV) for 20dB quieting.

7-8
 AF Signal
Oscillo-- Millivolt
scope Generator
meter

SP
JACK
RF
EXT. Voltmeter
SP

Power
0
IC 1
Supply
(MAIN)
(8.4V)

C. 2nd LO Frequency Check

Connect a 16.9MHz amplifier to the frequency counter, check the frequency of X101 (2nd OSC)
with a loose couple. It should be: 16.900MHz ±400Hz.

D. Receiver Spurious Response

Connect a speaker and millivoltmeter to the EXT SP. Connect a 50 ohm dummy load to the
antenna terminal. All receiver spurious should be supressed less than 3dB, over entire frequency
range.

E. Receive Audio Output

Connect a millivoltmeter, oscilloscope, and a distortion meter to the EXT SP connector. To the
ANT terminal connect the signal generator and set the signal generator to -80 to -90d8m and
deviation to 3.5KHz. Turn up AF VOL control. Read the millivoltmeter when the distortion is
10%.

7-9
 BOARD LAYOUT
MAIN UNIT

rn --- 2.
'
::? ••
rn_
- rn-- @
• ])•
-
g ...,.:;
""f o ...'
9 ' .. ft
f'o
i;"
.. : 7-
§""
=~
"2 2
0
- -
!!
!0

0©• UQU
0 --- 0

UQ• uQw
0

u¥• ~/
• • 0 • •

u.

•.

0 --
0

2
••

0
CXl

8- 1
BOARD LAYOUT
PLL UNIT

--
a
~
•
0

0
J

u.

<f ;/q
w

: .(G\
i!f ~{:·
t:ij~~ '. (
0 '-1-l -':~~~

(.)

- lClW
.>II<'
•
~ J
0 ~

·'
m
r'

<(

8- 2
BOARD LAYOUT
MATRIX UNIT

• MATRIX LAYOUT
NOil N8 N>

N40 NlO N4 N' RECflVI; 0NI Y

TX CHfl I
1 )( CH~
1x c..ist rx

.• •
(>.'1

lX CH< I r x Oi.3
lx Cu.3t - rx c••7
lX CH1 I 0
a
1X CHl'
a
RX CHS I • 0
RX CHS I 0
0
RX CH• I 0
ID
Ax CH3 I 0
RX CH> I
0
0
RX cu I I
•
ID

CH6
Cll5
CH4
CH3
CH2
CHI

RX CH~
Al~H2)
Rx'-Ci'f1

8- 3
 SECTION 9 VOLTAGE CHARTS

TRANSISTORS VOLT AGE CHART • Measuring instrument is a 50KQ/V multimeter.

.. -
TRANSMIT RECEIVE
UNIT NO. BASE
or
COLLECTOR
or
EMITTER
or
BASE
or
COLLECTOR
or
EMITTER
or
REMARKS I
GATE DRAIN SOURCE GATE DRAIN SOURCE
..
MAIN 0101 0 0 GNO 0.8 1.2 GND RF Amp
0102 i 0 0 I 0 1.9 5.8 1.2 RF Amp
0103 0 0 0 0 6.0 1.4 1st Mixer
0104 0 0 GNO 0.7 0.9 GND 1st IF Amp
. . --
0105 0 0 0 1.5 2.8 0.9 1st IF Amp
0106 5.2/6.0 I 5.9/0 6.0 6.0 0 6.0 T /R Switch Locked/Unlocked
--
0107 0 /0.6 0.7/0 GND 0 /0.6 0.3/0 GND T /R Switch Locked/Unlocked
-
0108 0.7 0 GND 0.3 6.0 GNO T/R Switch
0109 I 5.8 0 6.0 5.3 6.0 I 6.0 . T/R Switch I
0110 0 8.1 0.4 6.0 7.7 5.4 T/R Switch
0111 8.1 0 8.4 7.7 6.2 8.4 T/R Switch
.. - -·
l 0112 5.9/0 I 8.0/8.4 5.2/0 0 8.4 0 I T /A Switch Locked/Unlocked

0113 0 0.6 4.2 o- 1.2 Noise Detector

0 3.2 - 3.7 SOL CLOSED/SOL OPENED
- I
-
0114 0.6 0 GNO 0.610 0 /8.0 GND Squelch Control Closed/Opened
I I
0115 0 8.0 0 0 /8.0 8.0 0 17.4 · Squelch Control
0116 8.0 0 8.4 8.0 0 17.4 8.4 T/R Switch SOL Closed/Opened
0117 0.6 8.4 1.7 0.6 8.4 1.7 Regulator
0118 7.7 6.0 8.4 I 7.7 6.0 8.4 Regulator I
0119 0.6 6.0 I GND 0.6 7.4 GND Regulator
0120 0.6 0.6 GND 0.6 0.6 GND

~:!
6.4 4.5 6.0 6.4 0 6.0 ! ndicator Control
I
-
I ' Indicator Control
4.5 5.1/0 5.2/0 0 0 0 Locked/Unlocked
3 4.6 5.2 5.2 6.0 1.6 6.0 T/R Switch
i
,9125 ' 3.0 ! 5.2 2.6 0 0 0 i Mic Amp I
0126 3.2 5.1 2.6 0 0 0 Mic Amp
-
0127 5.1 2.0 5.2 0 0 0 Mic Amp
0128 0.3 2.4 I GNO 0 ' 0 GND Limiter

PLL
0129
0201
2.4tit
0
i

5.2
3.1
0.6
"±jj
0
.
i

5.2
..
0
0.6 VCO, FM Mod.
.
Low Pass Filter
.
-
'

I
0202 0.6 1.0 GND o~~ GND Buffer Amp
I
··g
l 1.0
-·
0203 1.6 3.4 1.0 1.0 Buffer Amp
- ----
0204 0.7 0.8 GND 0.7 0.8 GND PLL Mixer
.
0205 1.8 3.4 1.3 1.8 I 3.4 1.3 Level Converter
0206 2.2
I
5.9
I
1.8
. 2.2 I 5.9 I 1.8 Multiplier
0207 0 0 1.2 1.6 5.8 1.0 Multiplier
0208 0.5 1.2 GNO 0.5 I 1.0 GNO Buffer Amp
I
0209 1.7 I 5.6 1.2 0 l 0 1.0 Multiplier
0210 -0.6-0 1.5 GNO 0.7 0 GND T/R Switch
-·
0211 1.4 8.0 0.6 0 8.4 0 Buffer Amp
0212 0.6 8.4 0.2 0 8.4 0 Driver
'
0213 0.5 8.4 GND 0 8.4 GND Power Amp
...
0214 5.9/5.4 0 /6.0 6.0 5.9/5.4 Lock Failure Mute
0 16.0 6.0
Locked/Unlocked
.. ------

9-1
IC'S VOLTAGE CHART • Measuring instrument is a 50KO/V multimeter.

IN TRANSMIT MODE

PIN No.
UNIT IC No. REMARKS
1 2 •3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
MAIN IC101 0 0 0 0 0 0 0 0 0 0 0 GND 0 0 GND 0
MAIN IC102 0 0 0 0 GND 0 0 0 0
~~·"

PLL IC201 6.0 2.0 * * * * * * * * * * * * * 0 0 GND

PLL IC202 0 3.0 1-5 6.0 6.0 0 10 3.0 GND
--·
PLL IC203 1.4 2.5 2.5 - 6.0 3.0 - - GND

* 6.0V or OV depending on the diode matrix programming.

IN RECEIVE MODE

PIN No.
UNIT IC No. REMARKS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
MAIN IC101 6.0 5.6 5.9 6.2 1.0 1.0 1.0 6.2 3.5 1.9 2.0 GND 5.6 0 GND 2.0
MAIN IC102 5.9 3.9 7.4 3.3 GND 3.3 3.3 3.1 7.4 SOL OPEN
I
..
PLL IC201 6.0 2.0
* * * * * * 0 0 GND
·- ---* * * * * * *
PLL IC202 0 3.0 1~5 6.0 6.0 0 0 3.0 GND
PLL IC203 1.4 2.5 2.5 - 6.0 3.01 - - GND I
* 6.0V or OV depending on the diode matrix programming.

9-2
 MAIN UNIT

N (")
l{)
0 0
0

-
0
-
0 -
0::

ANT
R II
(T I

(Rimi
T DJ
~ 7. 5nS 7.2nS
LO r\Z=} 200mVP-P
Q (RD)
R r«i]
T.Locked~ Qlll
(~-~edGDf:EI
T. Unlocked
SOL Count.1
( TD)
~ T.Locked~ (
T. Unlocked [iJ T. Unlocked~ Rlllll
T llJ
6V

T6V

SEND LJ--t---t-----~

R6V
-
0::

vcc
MUTEv---...--+-+---------_J - N <:t
l{) l{) l{)

0118
-
u
- -
u u
SPJ
SP

SPE

EXT MIC
IN MIC SIOI
PTT

PTT -
u

R DJ
LED T. Locked nl
(
T. Unlocked [iJ
 61nS

~OOmVP-P
Cl'.)

0 N (R~
u x u T(G

- AF OUT
Fl IOI (R(;]6 (Rg] u
00 T • T(i)
RI07 f
SOL OUT

rn :
u
ICI0.1
12 I I -
SQLIN

.IIII~
u

-
a::

-
Ri78
0132 R f:ltJ RlfJE
SQLCount.. ( Squelched(;] ( Squelched[;]
oGEI ( T(;J TlG t:wa T(G
AFIN

SP OUT

TONE IN
MUTE
TONE 6V
u +
Cl74

~.nR151
I<{)
L{)
L{)
u - MOD OUT
a::

22

,__e-~~~""'\f\.IV'-~~~~~~~~~~~~~~-t-L>-

0::

tdMI
ked m

9-3
PLL UNIT

R249 DB
fl 5.9VP-P

(Locked B;]
BB 1119

-
Unlocked

2
[;'D]

.....
15
17
s 7
5
4
14
13 IC202 R256

12 m I'
0

11
R
8
9
3 R204
I R206
(IJ
0::

IC201 q-
~I.
l~ ~ ~l
10
C213 R205
9
~1400µ~
flSlJ
-
8
6.0 VP-P
7 (Rim]
Tiii
6
5
3 ..
5 RR
6
.i-_
(RTrtJa ]

-
q- 0
4 IC203 ;i;~ (IJ
x 0.2µ5
3 2f!llD
r-1 C247
'\[']5VP-P
18 9

+(IJ
0
(")
0

- (RI
(~'·'!~=11
m 0 \D
(") q q 0
(IJ (IJ (IJ C\J Ti
0 0 u ....J

7.5nS"-7. 2nS
r----1 I'

'\.LIIVP-P ~l 15nS-··13nS (R(!J.

~ (Rimi mVP-P----,~VV'---=-----\1\I\,,......_-t--t--=-------Tt-@_l_#J
'.::J /T8)
0207 I o2os
QJ.200

o209
RIB
TE

LO

(IJ q
(!) \D
(IJ (IJ
0 0
 15T'\S~l3nS 0.4~0.2µS
15nS~l3nS
H
'\f'_]1 OOmVP-P :\CJ.~i-PA}_] I VP-P
MUTE
0.4-0.2µS

V--=r4VP-P
Sholl not be
Less than 2VP-P

-
("')
N
.....__ "' ""--' u
gj R213 ~
r5;t; ........
MOD

C247

E
6V
R6V
RI;] (R[!l'!l
(
~~~~~~~+-T~i;t:==·~l~~~~~T=l;J=-~~~~~~--t-~~~~~~~~~--.--uR6V
T6V
T6V

vcc
L230
Output PWR.
• 3.0W
ANT

SEND
RX
N

I~ ~E
RI;]
( T[ig

9-4
SECTION 10 TROUBLESHOOTING

NO POWER ON

START

NG Battery is discharged
>---3.i Bad battery contacts
Reverse polarity of
batteries (IC-CM4 ).

OK OK

Opened wire between

E!)terminal and power
switch or defective
power switch.

NO Check Q117, Q119,

>---3.iQ120, 0104, etc., of
MAIN unit.

Check Qll7, Q119, Burned or opened

Ql20, 0104, etc., of Rl42 of MAIN unit.
MAIN unit.

Send the set to dealer

or ICOM service center.

10-1
LOCK FAILURE

START

NO Refer to "NO POWER

ON".

NO Check voltage of
IC203 (PLL unit).

YES

NO Defective IC203
(PLL unit).

YES

Defective X201
(PLL unit).

NO Defective X202
(PLL unit).

YES

Check voltage of
IC201 (PLL unit).

YES Defective IC201

(PLL unit).

NO, but cannot

resolve it

Send the set to dealer

or ICOM service center.

10-2
NO RECEPTION

START

Check for opened

wires or cold soldering
between ANT con-
nector and MAIN unit.

Replace the wires or

resolder them.

Lock is failed. Refer to

"LOCK FAILURE".

Defective Q208
(PLL unit).

YES, but cannot

resolve it.

NO Defective IClOl
(MAIN unit).

YES

Send the set to dealer Defective XlOl

or ICOM service center. (MAIN unit).

10-3
NO TRANSMIT RF POWER

START

Check for opened

wires or cold soldering
between ANT con-
nector and MAIN unit.

~-N_o_ _ _ _~ Replace the wires or

resolder them.

~-N_o_ _ _ _~ Lock is failed. Refer to

· "LOCK FAILURE".

NO Defective 0208
(PLL unit).

NO Defective 0209
(PLL unit).

NO Defee tive O21 2

(PLL unit).

NO Defective 0213
(PLL unit).

NO Defective D216, C290,

>------~ C291.

Check D217 and ANT Send the set to dealer

connector. ~-----....,.or ICOM service center.
OK, but
cannot resolve
it.

10-4
SECTION 11 IC SPECIFICATIONS

TC·9122P (BCD PROGRAMMABLE COUNTER)

MAXIMUM RATINGS (Ta= 2S°C)

SYMBOL DESCRIPTION RATINGS UNIT

Voo Supply Voltage 10 v
VIN Input Voltage -0.3 - Voo +o.3 v
TOPR Operating Temperature -30- 75 oc
TSTR Storage Temperature -55-125 oc

PIN CONNECTION

BLOCK DIAGRAM

100-500Kfi

PIN1i----1 BCD Programmable Counter POUT

VDO GND A1 A2 A3 A4 81 B2 B3 B4 C1 C2 C3 C4 01 02

X1 X10 X100 X1000

11 -1
MC-3357 (LOW POWER FM IF)

MAXIMUM RATINGS (Ta= 25QC)

SYMBOL DESCRIPTION RATINGS UNIT

Vee Supply Voltage (MAX) 12 Voe
Vee Operating Supply Voltage 4 to 8 Voe
VIN Input Voltage 1.0 VRMS
TOPR Operating Temperature -30 -+70 QC

TSTG Storage Temperature -65,..,,, +150 QC

BWCK DIAGRAM

Vee

( 10.7MHZ INPUT

GROUND

455KHZ AUDIO MUTE

FILTER
SCAN CONTROL

DEMODU-
LATOR

PIN CONNECTION

LIMITER
5
INPUT

DECOUPLING 8

LIMITER
FIL. INPUT
OUTPUT 7
DEMOD.
9 OUTPUT

11 - 2
TC-5081 (PHASE COMPARATOR)
0
MAXIMUM RATINGS (Ta= 2S C)

SYMBOL DESCRIPTION RATINGS UNIT

Yoo Supply Voltage IO v
VIN Input Voltage -0.3 - Yoo +o.3 v
TOPR Operating Temperature -30- 75 oc
TSTR Storage Temperature -55 -125 oc
PIN CONNECTION

(, 2 3 4 5 6 7 8 91
ODDDDDDDD
en a: oI- WI- Q (,,)
:::> ~::>o z z
0 ~0>
~ a. "
TC-5082 (OSCILLATOR AND 10 STAGE DIVIDER)
0
MAXIMUM RATINGS (Ta= 2S C)

SYMBOL DESCRIPTION RATINGS UNIT

Yoo Supply Voltage IO v
VIN Input Voltage -0.3 - Yoo +o.3 v
TOPR Operating Temperature -30- 75 oc
TSTR Storage Temperature -55-125 oc
PIN CONNECTION

(ODDDDODDO I
I- I- I- N Q ~ 0 ~ Q
:::> x x ~ Q ~ ~ 0 z
0 0 > 0 0 "
....
x

BA-526 (700mW AMPLIFIER)

MAXIMUM RA TINGS (Ta = 25° C)

SYMBOL DESCRIPTION RATINGS UNIT

Vee Supply Voltage 9 v
Pd Permissible Dissipation 700 mW
TOPR Operating Temperature -10-+65 oc
TSTG Storage Temperature -30 - +125 oc
PIN CONNECTION
r'-"

'I

l l l l ~
123456789

11 - 3
 SECTION 12 PARTS LIST

[EF PARTS] [MAIN UNIT PARTS]

REF BOARD REF BOARD
DESCRIPTION (PART NO) DESCRIPTION (PART NO)
NO. LOCATION NO. LOCATION.

D1 LED SLC·26UR 0127 Transistor 2SA 1048-Y 4F

0128 Transistor 2SC2458-GR 4F
R1 Variable K121B1003E5N (VOL) 0129 Transistor 2SC2458-GR 4G
Resistor 1111-10KA 0130 Transistor 2SC2458-GR 1G
R2 Variable K12141014- (SOL) 0131 Transistor 2SA 1015-Y 1G
Resistor 5N1212-10KB 0132 Transistor 2SC2458-G R 3F

C1 Ceramic 470pF/50V D101 Diode 1S1555 2C

C2 Ceramic 470pF/50V D102 Diode 1S1555 4D
C3 Ceramic 15pF/50V D103 Zener Diode WZ-081 3C
D104 Zener Diode EZ-056A 1F
J1 Connector BNC-RM (ANT) D105 Diode 1S1555 3F
J2 Connector HSJ0296-01-150 (EXT SP)
J3 Connector HSJ0289-01-050 (MIC) Fl101 Crystal Filter 16M 15B2 1B-2C
Fl102 Ceramic CFU455E2 3E
P1 Connector XHP-13 Filter

S1 Rotary Switch SRM1026 X101 Crystal 16.445MHz HC-18/T 2E

SP1 Speaker 45P30S L 101 Inductor LS-160 2A

L102 Inductor LS-160 1A
MC1 Microphone EM-80 L103 Inductor LS-160 1B
L104 Inductor LS-160 1B
B1 P.C. Board B-415 L105 Inductor LS-221 1C
(Contact Board) L 107 Inductor LS-158 4D

R101 Resistor 10Kn -J ELR10 2A

R102 Resistor 100Kn-J ELR10 1A
[MAIN UNIT PARTS] R103 Resistor 1oon -J ELR10 2B
R105 Resistor 56n -J ELR10 1C
REF BOARD
DESCRIPTION (PART NO) R106 Resistor 22on -J ELR10 1C
NO. LOCATION
R107 Resistor 47Kn -J ELR10 2C
IC101 IC MC3357 2D R108 Resistor 1.2Kn -J ELR10 2C
IC102 IC BA526 4A R109 Resistor 330Kn-J ELR10 2C
R110 Resistor 10Kn -J ELR10 2C
0101 Transistor 2SC2026 1A R 111 Resistor 1.5Kn -J ELR10 2E
0102 Transistor 2SC2668-0 1A R112 Resistor 1.5Kn -J ELR10 3E
0103 FET 2SK192-Y 1C R113 Resistor 47Kn -J ELR10 3E
0104 Transistor 2SC2668-0 2C R114 Resistor 22Kn -J ELR10 3D
0105 Transistor 2SC2668-0 2C R115 Resistor 470n -J R10 4C
0106 Transistor 2SA1048-Y 1E R116 Resistor 330Kn-J ELR10 3D
0107 Transistor 2SC2458-GR 1E R117 Resistor 4.7Kn -J ELR10 4C
0108 Transistor 2SC2458-GR 1E R118 Resistor 5.6Kn -J ELR10 3D
0109 Transistor 2SA1048-Y 2D R119 Resistor 1Kn -J ELR10 1E
0110 Transistor 2SC2458-GR 1C R120 Resistor 2.2Kn -J ELR10 1E
0111 Transistor 2SA1048-Y 1C R122 Resistor 3.3Kn -J ELR10 1D
0112 Transistor 2SC2458-GR 2E R123 Resistor 1Kn -J ELR10 1E
0113 Transistor 2SA1048-Y 3C R124 Resistor 3.3Kn -J ELR10 1D
0114 Transistor 2SC2458-GR 4C R125 Resistor 10Kn -J ELR10 1D
0115 Transistor 2SC2458-GR 3B R126 Resistor 10Kn -J ELR10 1C
0116 Transistor 2SB562-C 4C R127 Resistor 10Kn -J ELR10 1C
0117 FET 2SK192-Y 1G R128 Resistor 1.5Kn -J ELR10 1C
0118 Transistor 2SB562-C 1G R129 Resistor 47n -J ELR10 2E
0119 Transistor 2SC2458-GR 1G R130 Resistor 68Kn -J ELR10 2C
0120 Transistor 2SC2458-GR 1F R131 Resistor 22Kn -J ELR10 2B
0121 Transistor 2SA1048-Y 2F R132 Resistor 10Kn -J ELR10 3B
0122 Transistor 2SA1048-Y 2E R134 Resistor 15Kn -J ELR10 3C
0123 Transistor 2SA1048-Y 1D R135 Resistor 10Kn -J ELR10 3C
0124 Transistor 2SC2458-GR 4D R136 Resistor 47Kn -J R10 4D
0125 Transistor 2SC2458-GR 4E R137 Resistor 22Kn -J ELR10 4C
0126 Transistor 2SC2458-GR 4E R138 Resistor 22Kn -J ELR10 3C

12 - 1
 [MAIN UNIT PARTS] [MAIN UNIT PARTS]

REF BOARD REF BOARD

DESCRIPTION (PART NO) DESCRIPTION (PART NO)
NO. LOCATION NO. LOCATION

R139 Resistor 330S1 -J ELR10 4A C119 Ceramic 0.001µ/50V 2C

R140 Resistor 3.3KS1 -J ELR10 1F C120 Ceramic 22pF/50V 2D
R141 Resistor 4.7KS1 -J ELR10 1G C121 Ceramic 120pF/50V 2E
R142 Resistor 2.2n -J E LR10 1G C122 Barrier Lay 0.1µF/16V 3E
R143 Resistor 2.7KS1 -J ELR10 1F C123 Electrolytic 0.1µF/50V MS7 3E
R144 Thermistor 33028 1F C124 Ceramic 10pF/50V 3E
R145 Resistor 470S1 -J ELR10 1F C125 Barrier Lay 0.0033µF/50V 4C
R146 Resistor 22KS1 -J ELR10 1E TB005V
R147 Resistor 470S1 -J ELR10 1D C126 Electrolytic 0.22µF/50V MS7 4C
R148 Resistor 220KS1-J ELR10 1F C127 Electrolytic 0.22µF/50V MS7 4C
R149 Resistor 47KS1 -J ELR10 2F C128 Ceramic 0.001µF /50V 4C
R150 Resistor 330S1 -J ELR10 1E C129 Ceramic 0.001µF/50V 3C
R151 Resistor 10KS1 -J ELR10 10 C130 Ceramic 0.001µF/50V 3C
R152 Resistor 33KS1 -J ELR10 4C C131 Ceramic 33pF/50V 3C
R153 Resistor 100KS1-J ELR10 4E C132 Ceramic 0.001µF /50V 3C
R154 Resistor 150KS1-J ELR10 40 C133 Electrolytic 4.7µF/35V MS7 1E
R155 Resistor 2.2KS1 -J ELR10 40 C134 Ceramic 470pF/50V 1E
R156 Resistor 68KS1 -J ELR10 4E C135 Electrolytic 1µF/50V MS7 3C
R157 Resistor 120KS1-J ELR10 4E C136 Electrolytic 0.47µF/50V MS7 40
R158 Resistor 470S1 -J ELR10 4E C137 Electrolytic 1µF/50V MS7 3C
R159 Resistor 4.7KS1 -J ELR10 4E C138 Electrolytic 3.3µF/50V MS7 30
R160 Resistor 3.3KS1 -J ELR10 4E C139 Electrolytic 10µF/16V MS7 4A
R161 Resistor 2.2KS1 -J ELR10 4F C140 Ceramic 0.001µF/50V 3A
R162 Resistor 10KS1 -J ELR10 4F C141 Electrolytic 0.47µF/50V MS7 4A
R163 Resistor 33S1 -J ELR10 4F C142 Electrolytic 10µF/16V MS7 4A
R164 Resistor 1KS1 -J ELR10 4F C143 Ceramic 0.001µF/50V 4B
R165 Resistor 2.2KS1 -J ELR10 4F C144 Electrolytic 100µF/10V MS9 4B
R166 Resistor 2.2KS1 -J ELR10 4F C145 Electrolytic 47µF/10V MS9 4A
R167 Resistor 22KS1 -J ELR10 4F C146 Electrolytic 100µF/10V MS9 4B
R168 Resistor 1KS1 -J ELR10 4F C147 Ceramic 0.001µF/50V 4C
R169 Resistor 82KS1 -J ELR10 4G C148 Electrolytic 47µF/25V MS9 40
R170 Resistor 100KS1-J ELR10 4G C149 Ceramic 470pF/50V 1G
R171 Resistor WHS512A 10KS1 4G C150 Electrolytic 0.22µF/50V MS7 1F
R175 Resistor 3.9KS1-J R10 2G C151 Ceramic 470pF/50V 1F
R176 Resistor 10KS1 -J R10 2G C152 Electrolytic 100µF/10V MS9 1F
R177 Trimmer H0651A 4.7KS1 3F C153 Ceramic 470pF/50V 1F
R178 Resistor 47KS1 -J ELR10 3F C154 Electrolytic 100µF/10V MS9 1E
R179 Resistor 33KS1 -J ELR10 3F C155 Electrolytic 10µF/16V MS7 1D
R180 Resistor 47KS1 -J ELR10 2E C156 Electrolytic 0.47µF/50V MS7 40
R181 Resistor 1KS1 -J E LR10 2C C157 Electrolytic 10µF/16V MS7 4E
R182 Resistor 470S1 -J ELR10 1A C158 Barrier Lay 0.01µF/50V 40
TB005V
C101 Ceramic 8pF/50V 2A C159 Ceramic 470pF/50V 4E
C102 Ceramic 1pF/50V 2A C160 Ceramic 470pF/50V 4E
C103 Ceramic 100pF/50V 2A C161 Ceramic 470pF/50V 4E
C104 Ceramic 470pF/50V 1A C162 Electrolytic 1µF/50V MS7 4E
C105 Ceramic 470pF/50V 1A C163 Ceramic 0.01µF/50V 4F
C106 Ceramic 7pF/50V 1A C164 Mylar 0.0027µF/50V 4F
C107 Ceramic 7pF/50V 1B C165 Mylar 0.0047µF/50V 4F
C108 Ceramic 0.35pF/50V 1B C166 Ceramic 120pF/50V 4G
C109 Ceramic 0.35pF/50V 1B C167 Electrolytic 1µF/50V MS7 4G
C110 Ceramic 5pF/50V 1B C168 Ceramic 0.001µF/50V 30
C111 Barrier Lay 0.0047µF/50V 1C C170 Barrier Lay 0.0047µF/50V 3F
TB005V TB005V
C112 Barrier Lay 0.0047µF/50V 1C C174 Electrolytic 10µF/16V MS7 4E
TB005V C175 Electrolytic 0.47µF/50V MS7 3E
C114 Ceramic 5pF/50V 2B C176 Ceramic 470pF/50V 40
C115 Ceramic 0.001µF /50V 2C
C116 Barrier Lay 0.0047µF/50V 2C S101 Switch TWN-0301 1D
TBD05V
C117 Tantalum 10µF/6.3V 2E B101 P.C. Board B-391C
ECSF6E 10
C118 Barrier Lay 0.0047µF/50V 2C Beads Core OL-20P2.6-3-1.2H
TBD05V

12- 2
 [PLL UNIT PARTS] [PLL UNIT PARTS]

REF BOARD REF BOARD

DESCRIPTION (PART NO) DESCRIPTION (PART NO)
NO. LOCATION NO. LOCATION

IC201 IC TC9122P 2E R205 Resistor 470!1 -J R10 3F

IC202 IC TC5081P 1F R206 Resistor 100KS1-J ELR10 3F
IC203 IC TC5082P-GL 1F R207 Resistor 100KS1-J ELR10 3E
R209 Resistor 22on -J ELR10 4F
0201 FET 2SK192-Y 3F R210 Resistor 22KS1 -J ELR10 4F
0202 Transistor 2SC2668-0 3E R211 Resistor 22on -J ELR10 3E
0203 Transistor 2SC2668-0 3E R212 Resistor 33KS1 -J ELR10 3E
0204 Transistor 2SC2668-0 3C R213 Resistor 120KS1-J ELR10 3D
0205 Transistor 2SC945-R 2D R214 Resistor 2.2KS1 -J ELR10 3C
0206 Transistor 2SC2026 1C R215 Resistor 22n -J ELR10 3D
0207 Transistor 2SC2668-0 3G R216 Resistor 10KS1 -J ELR10 2D
0208 Transistor 2SC2026 3G R217 Resistor 2.2KS1 -J R10 2D
0209 Transistor 2SC2668-0 3G R218 Resistor 220KS1-J ELR10 2D
0210 Transistor 2SC2458-GR 4G R219 Resistor 470!1 -J ELR10 2D
0211 Transistor 2SC383TM 4F R223 Resistor 2.2KS1 -J ELR10 3C
0212 Transistor 2SC2053 4D R224 Resistor 2.2KS1 -J ELR10 38
0213 Transistor 2SC1947 48 R227 Resistor 2.2KS1 -J ELR10 2C
0214 Transistor 2SA1048-Y 2E R228 Resistor 2.2KS1 -J ELR10 28
R231 Resistor 22KS1 -J ELR10 1C
D203 Varactor Diode 1SV50 3E R232 Resistor 22KS1 -J ELR10 1C
D204 Diode 1SS53 4E R233 Resistor 1KS1 -J ELR10 1C
D205 Diode 1SS53 4D R234 Resistor 33KS1 -J ELR10 2C
D210 Diode 1SS53 1C R235 Resistor 47!1 -J ELR10 3C
D211 Diode 1SS53 1C R237 Resistor 47!1 -J ELR10 2G
D214 Diode 1S1555 3G R238 Resistor 82KS1 -J ELR10 2G
D215 Diode 1S1209 4C R239 Resistor 10KS1 -J ELR10 3G
D216 Diode 1SS53 48 R240 Resistor 82KS1 -J ELR10 3G
D217 Diode 1SS53 4A R241 Resistor 47!1 -J ELR10 4G
D218 Diode 1S1555 3F R242 Resistor 10KS1 -J ELR10 4G
R243 Resistor 150!1 -J ELR10 4F
X201 Crystal 5.12000MHz HC-18/T 2F R244 Resistor 470!1 -J ELR10 4G
X202 Crystal * HC-18/T 2C R245 Resistor 27!1 -J ELR10 4F
X203 Crystal * HC-18/T 28 R246 Resistor 47!1 -J ELR10 4G
(*Refer to page 3 - 4) R247 Resistor 47!1 -J ELR10 4F
L201 Inductor LR-125 3D R248 Resistor 47!1 -J ELR10 4D
L202 Inductor LR-79 4E R249 Resistor 2.2KS1 -J ELR10 1F
L203 Inductor LB-88 4E R250 Resistor 27!1 -J ELR10 4D
L204 Inductor LW-20 3D R252 Resistor 22n -J ELR10 4C
L205 Inductor 100 L4 1D R253 Resistor 330!1 -J ELR10 4A
J._206 Inductor LR-79 3D R254 Resistor 15KS1 -J ELR10 4A
L211 Inductor LB-91 3C R256 Resistor 100KS1-J ELR10 2E
L212 Inductor LB-134 28 R257 Resistor 2.2KS1 -J R10 1G
L215 Inductor LS-160 2C
L216 Inductor LS-160 3C C201 Ceramic 0.001µF/50V 1E
L217 Inductor LS-160 1G C202 Ceramic 0.001µF/50V 1E
L218 Inductor LS-160 2G C203 Ceramic 0.001µF/50V 1E
L219 Inductor LS-160 4G C204 Ceramic 0.001µF/50V 1E
L220 Inductor LS-160 4G C205 Ceramic 0.001µF /50V 1E
L221 Inductor LS-160 4F C206 Ceramic 0.001µF/50V 1D
L222 Inductor LS-160 4E C207 Ceramic 0.001µF/50V 1D
L223 Inductor LA-127 4D C208 Ceramic 0.001µF/50V 1D
L224 Inductor LA-126 4C C209 Ceramic 0.001µF/50V 1D
L225 Inductor LA-121 48 C210 Ceramic 0.001µF/50V 1D
L226 Inductor LA-121 48 C211 Ceramic 0.001µF/50V 1D
L227 Inductor LR-78 4A C212 Ceramic 0.001µF/50V 2D
L228 Inductor LA-136 4A C213 Tantalum 10µF/6.3V 3F
L229 Inductor LA-135 4A C214 Barrier Lay 0.01µF/50V 3F
L230 Inductor LA-143 4A TBD05V
L231 Inductor LR-77 3E C215 Electrolytic 10µF/16V MS7 2F
L232 Inductor LR-118 3D C217 Ceramic 470pF/50V 3E
C218 Ceramic 470pF/50V 3D
R202 Resistor 47KS1 -J ELR10 2F C220 Ceramic 30pF/50V 4E
R203 Resistor 12KS1 -J ELR10 2E C221 Electrolytic 100µF/10V MS9 4D
R204 Resistor 1KS1 -J El,.R10 3F C222 Ceramic 470pF/50V 4D

12-3
 [PLL UNIT PARTS] [PLL UNIT PARTS]

REF BOARD REF BOARD

DESCRIPTION (PART NO) DESCRIPTION (PART NO)
NO. LOCATION NO. LOCATION

C223 Ceramic 470pF/50V 4F C289 Ceramic 470pF/50V 4C

C224 Ceramic 470pF/50V 4F C290 Trimmer 10pF 4B
C225 Ceramic 10pF/50V UJ 3F MCV5001H100
C226 Ceramic 1pF/50V 3F C291 Trimmer 20pF 4B
C227 Ceramic 33pF/50V UJ 3F MCV5001 H200
C228 Ceramic 3pF/50V 3F C292 Ceramic 470pF/50V 4A
C229 Ceramic 0.001µF /50V 30 C293 Ceramic 10pF/50V 4A
C230 Ceramic 0.001µF /50V 30 C294 Ceramic 100pF/50V 4A
C231 Ceramic 8pF/50V 30 C295 Ceramic 33pF/50V 4B
C232 Ceramic 22pF/50V 2C C296 Ceramic 100pF/50V 4A
C233 Barrier Lay 0.0047µF/50V 30 C297 Ceramic 2pF/50V 4A
TB005V C298 Ceramic 27pF/50V 4A
C235 Ceramic 22pF/50V 1D C300 Ceramic 470pF/50V 4A
C236 Ceramic 0.001µF /50V 20 C302 Electrolytic 0.47µF/50V MS7 4C
C237 Barrier Lay 0.0047µF/50V 20 C303 Ceramic 0.001µF/50V 2E
TB005V
C238 Ceramic 0.001 µF /50V 20 J201 Connector SB7P-HV0-22 1D
C239 Electrolytic 100µF/10V MS9 1F J202 Connector SB5P-HV0-22 1E
C240 Barrier Lay 0.0047µF/50V 3E
TB005V B201 P.C. Board B-3900
C241 Ceramic 0.001µF /50V 1G
C242 Ceramic 15pF/50V 2F Beads Core OL-20P2.6-3-1.2H
C243 Ceramic 33pF/50V 2F
C244 Ceramic 33pF/50V 1G
C246 Ceramic 0.001µF /50V 3B
Ceramic 0.001µF /50V 3B
[MATRIX UNIT PARTS]
C247
C251 Ceramic 0.001µF /50V 1C REF BOARD
C252 Ceramic 56pF/50V 1C DESCRIPTION (PART NO)
NO. LOCATION
C253 Ceramic 22pF/50V 1C
C254 Ceramic 47pF/50V 2C R401 Resistor 100KD.-J R10 1E
C255 Ceramic 0.001µF /50V 2C R402 Resistor 2.2KD. -J R10 1E
C256 Ceramic 39pF/50V 3C R403 Resistor 2.2KD. -J R10 1D
C257 Ceramic 5pF/50V 2C R404 Resistor 2.2KD. -J R10 3E
C258 Ceramic 5pF/50V 3C R405 Resistor 2.2KD. -J R10 3B
C261 Ceramic 47pF/50V 1G R406 Resistor 2.2KD. -J R10 1D
C262 Ceramic 10pF/50V 2G R407 Resistor 2.2KD. -J R10 3B
C263 Ceramic 0.5pF/50V 2G R408 Resistor 2.2KD. -J R10 3B
C264 Ceramic 0.001µF/50V 2G R409 Resistor 2.2KD. -J R10 3C
C265 Ceramic 10pF/50V 2G R410 Resistor 2.2KD. -J R10 3C
C266 Ceramic 0.001µF /50V 3G R411 Resistor 2.2KD. -J R10 2B
C267 Ceramic 470pF/50V 2F R412 Resistor 2.2KD. -J R10 1B
C268 Ceramic 0.001µF /50V 3G R414 Resistor 2.2KD. -J R10 38
C269 Electrolytic 4.7µF/25V MS7 3G
C270 Ceramic 7pF/50V 4G J401 Connector B13B-XH 1E
C271 Ceramic 0.35pF/50V 4G
C272 Ceramic 7pF/50V 4G P401 Connector F7P-HVO-K 1C
C273 Ceramic 0.001µF /50V 3G P402 Connector F5P-HVO-K 1B
C274 Ceramic 470pF/50V 4G
C275 Ceramic 47pF/50V 4G 8401 P.C. Board B-638
C276 Ceramic 470pF/50V 4F
C277 Ceramic 6pF/50V 4F
C278 Ceramic 0.5pF/50V 4E
C279 Ceramic 6pF/50V 4E
C280 Ceramic 470pF/50V 4F
C281 Ceramic 470pF/50V 4E
C282 Ceramic 47pF/50V 4E
C283 Ceramic 470pF/50V 4E
C284 Ceramic 470pF/50V 40
C285 Trimmer 20pF 40
MCV5001 H200
C286 Trimmer 10pF 4C
MCV5001H100
C287 Ceramic 27pF/50V 4C
C288 Electrolytic 1µF/50V MS7 4C

12 -4
 ~~~~~
g~~~~~
0 0 0
)IU
9Pl.Y
I
I
I
I
I
I
9SIS7 J.,017
I
I
I
z~·o 9zo
I
~ N
'N I
u c I
() L_
I-
<{
:?!
UJ
I L ______ _
()
(/)
~ 0.. ~
UJ
~ ~
ID a.
[JJ
\!
E
_J _J
f- f-
Cl 0 x \! x
[JJ > w E w
I
I
u
 ~0-;;0;;;-------------,

0 I~ It I~ jg jg jg 18 < I
BC-30

~
~

j ·~
l~s3l BAT
f------11---i
'> '- I -----6:
CH4 ~ ~I Cl 4~
R . - 11 - ~ n 3 II
o-.o---i Cl-f 3 l> ~ ,
~ I - 4 ~ r----~
CH2 n I c;;4 ~
CHI ,..... x I
RIOS Rl?'l~ ff-+ f ..

i <>~
"'
~
~A "'
flt.
::0
•
)J
£:.
~A 'ti
ti
~~ .,.,
~
::0
A ::0
2.i!K 4 ?K
T C.
·"'

e ~ s g ~ " ~ "' ~ ~ § --L--1

R249
z. z
I I c~
67

~ --
K
I NOD
~t I
Cl76
4?0P

co (., °' Vi °"" ..;i ai .ti C) ::: ~ ;:;; i ~ I R~

c > ~ ~ b ru ~ ~ ~ ~ ~ n ~ ~
- -.. "' u t::. - rv 1..u t::. .... r-.i ....., A < ( _
--- ·-· .... ..... ~ - C/66 ~PIE:~
" < n I ii::
~

,l\i
0
,
~
~
~ "'
I C/65 0.004?
----- I
~o·
-
.,

I
I
:o; I , .
~ I I c ;oc ~ ;$ $ '
.... :1)

~ ~ ~~ CZ/5
I I
~-
R /63
-3:3
I
1
rl...... _.

i;__z7z(9P) ~2 /0 '
~~ c~
~~
..
CZ/4 0.01 ~ 2i'.
00 ~ 0-

~ ~

~ ~
"'
"''
n
' •J

OR'~ ,z,

R232
LJ Rl.50 ..330
~

Rl4B
Z:ZOK"
c~

__.,,,

RZ33 IK
~

~•
t::: !
R-
HK ~~

~ l c154

CZS6
,-----,,_Jl_\/JLF,.LZl.S
1..:S/60
I R/44
33DZ8
·:·. :·.
Rl4.5
470

7
(4?PJ c_f"J

Cl C300470P

~~ §§ .~~2 ~~~~~~~~~~ ~

I
51-i
.tt.e
v..tt. ~1..il\i ... o~v.;lr:- r
~ ~ ~ ~~ r
~ ~ I\, Ill ""ti.

~ e ~~
lo-4 :ti lti (:;~ .~~i:; NNNl\lf\lr\lf\I r-,,!\i
c )( ~ i:.;' t..;< Vi~~~~~~ ~~
~ c~ V,~ ~'"'!<1'"'~
s: L
0 -
li--,
- - - " '- -
IO
- -0 w &~ ~ t: ~~~ ~~
N'

~~~~~--i~~~~~~~~-<1

~ ~ ~

n n n
lo-4
2! <I K ~ M.~.
ri 'w I 'l----0-- r c 148 47 ~
c ?>
z LLl ,d
1 ~1~_______ _:..::_
a ~ __ ~ 5 ~ - - _J L - - -Cf470001~
--·
~
~_____
-;

~
I.I.I
I:='
 AC BATTERY CHARGER

CM-30
MAINTENANCE MANUAL
SPECIFICATIONS

Applicable Battery Packs IC-CM2, IC-CM3, IC-CM5

IC-CM4 (applies only with Nickel-Cadmium batteries inserted)
Number of Semiconductors Transistor 9
IC 2
Diode 12
Power Supply Requirement 100/117 /230V AC 50/60Hz
(Input voltage can be selected by changing internal wiring.)
Charging Current 600mA for IC-CM2 and IC-CM5
25mA for IC-CM3
45mA for IC-CM4 (Nickel-Cadmium inserted)
Usable Temperature 0°C- +45°C for IC-CM3 and IC·CM4
+10°C- 40°C for IC-CM2 and IC-CM5
Dimensions 72mm(H) x 172mm(W) x 104mm{D)
Weight Approx. 1.0kg

DESCRIPTION OF CONTROLS

®
@

1. Power Switch 4. Insertion slot for battery packs.

When the charger is connected to a wall outlet,
it turns the charger on. 5. Charging terminal
Correspond to the terminals on the bottom of
2. Power Lamp the battery packs.
Indicates power is on.
6. Microswitches.
3. Charge lamp Since the current and capacity for each battery
Indicates charging is underway, goes out then pack is different, these microswitches select the
charging of rapid-charge packs is completed. proper factors for each one.

A-1
DISASSEMBLING

1. Remove the four screws which have retained the cover of the unit as shown in the figure.

2. Remove the cover from the chassis with taking care to donot make damage to the internal wirings
as shown. When you wish to remove the PC Board, remove the four screws at each end of the board
as shown in the figure.

A-2
 CIRCUIT DESCRIPTION

This charger provides proper charging current for various When the pulse voltage decreases less than gate's threshold
battery packs which is selected by charging current selector voltage, Pin 11 of IC2 puts out H level voltage. This turns
on the bottom of the battery pack. 04 and 03 on, and a portion of full-wave rectified voltage
Also a constant charging current is provided by controlling is fed to the gate of D6 SCA through 03, and 06 is turned·
conducting phase angle of the SCR in the circuit. It keeps on.
the current constant even if various battery packs which
have different output voltage, has been used. When the SCA has been turned on, it holds this condition
until the power source voltage becomes zero or its cathode
1. CONDUCTING ANGLE CONTROL CIRCUIT is biased by reverse voltage. Thus, when the full-wave
A gate pulse is used to control the thyristor (SCR) in the rectified voltage becomes less than +9V (D portion in the
circuit. This gate pulse is a part of a full-wave rectified figure), the SCA will be turned off.
wave and its phase angle is controlled by a saw tooth pulse
which is synchronized to the full-wave rectified wave. Rated charging current is decided by R37 - R42. R37 -
R42 are selected by S3 - S5 which are turned on or off by
The pulse falltime of the saw tooth pulse is controlled by a battery pack's charging current selector, and are in series
an actual charging current, and it decides the phase angle of with the charging battery.
the gate pulse of between 40 degrees and 160 degrees.
The saw tooth pulse generate circuit consists of 02, 05 and A voltage across R37, R38 or R39 - R42 is integrated by
C9. R14 and C16, then fed to the base of 06. 05 and 06
A full-wave rectified voltage is applied to the base of 02 compose a differential amplifier. A reference voltage which
through R4 and turns 02 on at near its base line (D portion is divided from +9V by R11 and R12, is applied to the base
in the figure), and charges C9 to +9V which from regulator of 05, thus the collector current of 05 is varied by the base
01. When the rectified voltage exceeds +9V (out of D voltage of 06, and controls discharging time of C9.
portion), 02 is turned off and the charged voltage of C9 is
discharged through 05, and a saw tooth wave is generated For example, when the charging current increases more
across C9. This saw tooth pulse is fed to Pin 12 of IC2. than the specified charging current, 06 collector current
increases, 05 collector current decreases, C9 discharging
time becomes longer, the phase angle of D6 gate pulse
delays (the pulse width becomes narrower), and the charg-
ing current decreases.

When the charging current decreases less than the specified

charging current, the circuit functions the opposite way and
keeps the charging current constant.

2. LOGIC CIRCUIT
The logic circuit is controlled by the charging current select
switches S3 - S5, and the charging detector 010.
When charging 1C-CM2 or IC-CM5, S5 is turned on by the
charging current selector on the battery pack.

The charging current (600mA) flows through R39 - R42,

and a voltage across these resistors is applied to the base of
010 and turns it on. Thus, a gate input Pin 1 and 2 of IC2
becomes L level, its output Pin 3 H level. This puts out H
level at Pin 4 of IC1, output of a flip-flop consisting of a
gate of ICl and a gate of IC2. Also Pin 10 of IC1 puts out
H level and Pin 10 of IC2 L level.

This grounds the emitter of 04 through R10 and Pin 10 of

IC2, and 03 is turned on during Pin 11 of IC2 is H level and
charges the battery pack.

[\ )I

[\ )

A-3
When the battery pack is fully charged, the built-in thermal When charging IC-CM3, S3 is turned on and the charging
switch in the pack is turned off and cuts off the 8 charging current (25mA) flows through R37.
terminal. Thus, H level is applied to Pin 1 and 2 of IC2, Pin 5 and 8 of IC1 are grounded through S5, Pin 10 of IC2.
Pin 5 of IC1 and the flip-flop is turned to reverse condition is L level and 04 emitter is grounded through R10. Thus,
and Pin 4 of IC1 becomes L level. This puts out H level at the charging current flows until the battery pack is removed
Pin 10 of IC2 and turns 04 off, and any charging current from the charger.
does not flow even if the thermal switch has been turned on
when the battery pack is cooled. When charging IC-CM4 inserted nickel-cadmium batteries
S4 is turned on and the charging current (45mA) flows
When the battery pack is removed from the charger, S5 is through R38. The logic circuit works the same as charging
turned off and Pin 5 of IC1 is grounded through S5. This IC-CM3.
resets the flip-flop for another charging.

SPECIFICATIONS OF BATTERY PACKS

IC-CM2 IC-CM3 IC-CM4 IC-CM4 IC-CM5

AA Size
N-425A R N-250A A AA Size N-425A R
Cells (X 6) (X 7) Nickel- (X 9)
Alkaline
[Capacity] Cadmium
[400mAH] [250mAH] (X 6) [400mAH]
(X 6)

Voltage 7.2V 8.4V 9.0V 7.2V 10.BV

RF Output 1.0W 1.5W 1.5W 1.0W 2.3W

Charging Rapid Normal Normal Rapid

Charging Time 1 -1.SH 15H ---------- 15H 1 -1.SH

----------
/
CM-30
Suitable
CM-30 CM-25U CM-30 CM-30
Charger
IC-CM1

Charging Current 600mA 25mA 45mA 600mA

Ambient Temperature

Overcharge Protect
+10°-+40°C

0
0°-+45°C

x
-----------
~
0
o -+45°C

x
+1o0 -+40°C

0
----------
Current
Selector

Height
~ ~
39m/m 39m/m
/ 49m/m
849m/m
~
60m/m

Battery Replace x x 0 0 x

A-4
 BLOCK DIAGRAM

Rectifier Current
AC INPUT
100/117 /230V
I., .- Transformer -- D3. D4 -
- Control
GP08 x 2 D6 2P1M

I ·~

Saw Tooth Wave Phase Angle Gate Pulse

.
-
Generator -
r
Control Gate
1/4 IC2
r
Generator
03 2SA1015
02 2SA1015 µPD4011 04 2SC1710

T
,---~ ~--- I
I I
Ga'ging Current
Reverse Flow
Control I Charging
-
r Stopper
D141S1555
05·06 --
-I
J"\

Battery Pack I
2SC945 x 2
I I

L ___ ..J. __ - _J
I
I
.~
I
Voltage Charging
Regulator
D1 XZ096
Detector ~~
01 2SC181& 010 2SC1740

+9V

·~ di

~
POWER IND.
®
CHARGE IND.

I
I
I
·~ I
1 Logic Circuit ,_ I
,_-
011·012 Charging Currmt
2SC1740 x 2 Selector IE-------..J
IC1 3/4 IC2 ,_- Current Selector Data
uPD4011 - S3-S5

A-5
 Cl>
n

a,,:r,:,
:::c
m
s:
C& :::!
. LI D' n
c
11, ; m QIO )>
~ ~D5 Q3 C)
R7 ~ :JJ
____ ____
.._ R30
I
I )>
C6 I
s:
cs
-H-
R71
rc3 I
I
I
I
D/4 I R3 I +9
r
1- - - - - --- -
R~L---
53
R23 25Mll

54
R2S
4S•A
C2 R&

)>

' i
I SS
RI! 61J(),,.A
Ol
~1---4 Q5 Q6 RIS
:____________ °6-ND-
R/4 R"
Rl7
C/4
Dll
R/2 Cl' I -.._ ••••I
s 4- SS

OH

IC-CM3 IC-CNl,S ~c~M4 - --, OFF

OFF

:~;
1

:o
. I;
:: ~
-""~
~
:01 +~
-
: Cl
01; ;01
\I
..
\J
in
{
-
: ~
01; i
~
"I I

- - -~- -o I o- ,
I
 VOLTAGE CHART

TRANSISTOR Note: Measuring instrument is a SOKU/V multimeter.

BATTERY No connection IC-CM3 (25mA) IC-CM4 (45mA) IC-CM2/CM5 (600mA)
COLLE- EMI
Tr. NO. BASE CTOR TTER BASE COLLE- EMI BASE COLLE- EMI BASE COLLE- TTER EMI
CTOR TIER CTOR TIER CTOR
Q 1 9.8 18.0 9.2 9.8 14.5 9.1 9.8 14.5 9.2 9.8 13.0/20.0 9.2
Q 2 9.4 2.9 9.2 9.4 6.2 9.1 9.4 6.2 9.2 9.4 5.2/4.4 9.2
Q 3 16.5 15.0 17.0 16.0 2.7 3.2 16.0 2.4 2.6 14.0 5.0/7.8 14.0
Q4 9.1 16.5 8.5 1.75 16.0 1.65 1.6 16.0 1.7 3.6/4.8 14.0 3.3/4.4
Q 5 0.9 2.4 0.32 1.0 6.0 0.45 1.0 6.2 0.45 1.0 4.9/3.9 0.44/0.42
Q 6 0.7 9.2 0.32 1.05 9.1 0.45 1.0 9.2 0.45 1.0 9.1 0.44/0.42
QlO 0 7.6 GND 0.75 0.1 GND 0.74 0.1 GND 0.75 0.1 GND
Qll 0 9.0 GND 0.65 0.1 GND 0.65 0.1 GND 0 8.9 GND
Ql2 0 9.0 GND 0 9.0 GND 0 9.0 GND 0.65 0.1 GND

IC
IC PIN NO.
Condition
NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14
- 9.0 9.0 0 9.0 0 0 GND 0 0 9.0 0 9.0 9.0 9.0
25mA 0 0 9.0 9.0 0 0 GND 0 9.0 9.0 9.0 0 9.0 9.0
IC! 45mA 0 0 9.0 9.0 0 0 GND 0 9.0 9.0 9.0 0 9.0 9.0
600mA 9.0 9.0 0 9.0 9.0 0 GND 9.0 0 9.0 9.0 9.0 0 9.0
CUT 9.0 9.0 0 0 9.0 9.0 GND 9.0 0 9.0 9.0 9.0 0 9.0
- 0 0 9.0 0 9.0 9.0 GND 9.0 9.0 0 9.0 2.5 0 9.0
25mA 0 0 9.0 0 9.0 9.0 GND 9.0 9.0 0 *1.0 *6.0 9.0 9.0
IC2 45mA 0 0 9.0 0 9.0 9.0 GND 9.0 9.0 0 *1.0 *5.o 9.0 9.0
600mA 0.8 0.8 9.0 0 9.0 9.0_ GND 9.0 9.0 0 *3.5 *5.o 9.0 9.0
CUT 4,3 4.3 0 9.0 0 0 GND 0 9.0 9.0 6.0 4.2 9.0 9.0
*Will be varied by battery voltage and/or charging conditions.

A-7
 PARTS LIST

REF. NO. DESCRIPTION I REF. NO. DESCRIPTION

-··
ICl IC µPD4011 R29 Resistor lOOK R2S
IC2 IC µPD4011 R30 Resistor S.6K R2S
R31 Resistor 470K R2S
Ql Transistor 2SC181S-O, Y, GL, BL R32 Resistor 22K R2S
Q2 Transistor 2SA101S-Y R33 Resistor 680 R2S
Q3 Transistor 2SA1015-Y R34 Resistor 680 R2S
Q4 Transistor 2SC1740-Q, R, S, E R35 Resistor lOK ELR2S
QS Transistor 2SC94S-P R36 Resistor lOK ELR2S
I R2S
Q6 Transistor 2SC94S-P R37 Resistor 27
QlO Transistor 2SC1740-Q, R, S, E R38 Resistor IS R2S
Qll Transistor 2SC1740-Q, R, S, E R39 Resistor 1 R2S
Q12 Transistor 2SC1740-Q, R, S, E R40 Resistor 1 R25
R41 Resistor 1 R25
D1 Zener XZ-096 R42 Resistor 1 R2S
D2 Diode lSlSSS I
I Electrolytic 47µF/2SV
D3 Diode GP-08B Cl
D4 Diode GP-08B
I C2 Electrolytic 10µF/16V
DS Diode lSlSSS C3 Ceramic 470P
D6 SCR 2P1M C4 Electrolytic lOOµF/lOV
D9 Diode GP-08B cs Ceramic 0.0047
DlO Diode lSlSSS C6 Ceramic 0.0047
Dll Diode lSlSSS C7 Ceramic 0.0047
D12 LED LD-002R C8 Ceramic 470P
D14 Diode lSlSSS C9 Barrier Lay 0.047
ClO Ceramic 470P
L1 Choke LW-16 C11 Ceramic 470P
L2 Choke LW-9 Cl3 Ceramic 470P
L3 Choke LW-9 C14 Ceramic 470P
ClS Ceramic 470P
RI Resistor 820 ELR2S CI6 Electrolytic 47µF lOV
R2 Resistor 220 ELR2S C19 Electrolytic 22µ 16V
R3 Resistor 33 ELR25 C20 Ceramic 470P
R4 Resistor 22K ELR25 C21 Ceramic 470P
RS Resistor 2.2K ELR2S C22 Electrolytic 2.2µ sov
R6 Resistor 3.3K ELR25
R7 Resistor lK R2S Sl Switch SDJ2S
R8 Resistor lOK R25 S3 Switch D2MS
R9 'Resistor lK ELR2S S4 Switch D2MS
RlO Resistor 47K R2S SS Switch D2MS
Rl l Resistor 22K ELR2S
R12 Resistor 2.7K ELR2S PC Board B-439B
R13 Resistor I.SK ELR2S
R14 Resistor 22K ELR2S HEATSINK 41912
RlS Resistor lSK ELR2S
R16 Resistor 680 ELR2S Fuse Holder S-NSOSl
R17 Resistor 820 ELR25
R23 Resistor lOK ELR2S II Fuse 2A
R24 Resistor IOOK ELR2S
R25 Resistor IOK ELR2S Tl Transformer TP-25
R26 Resistor lOOK ELR2S
R27 Resistor IOK ELR2S Power Cord OPC-013
R28 Resistor lOOK ELR25

A-8
lcom Inc.
6-9-16, Kamihigashi, Hirano-ku, Osaka 547, Japan