Icom IC-4088SR User manual

SERVICE
MANUAL
PMR446 FM TRANSCEIVER

INTRODUCTION
DANGER
ORDERING PARTS
REPAIR NOTES
This service manual describes the latest service information
for the IC-4088SR PMR446 FM TRANSCEIVER at the time
of publication.
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than 5.0 V. Such a connection
could cause a fire or electric hazard.
DO NOT expose the transceiver to rain, snow or any liquids.
DO NOT reverse the polarities of the power supply when
connecting the transceiver.
DO NOT apply an RF signal of more than 20 dBm (100mW)
to the antenna connector. This could damage the trans-
ceiver's front end.
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit order numbers
2. Component part number and name
3. Equipment model name and unit name
4. Quantity required
<SAMPLE ORDER>
5030002520 LCD L2-0494TAY IC-4088SR Main unit 5 pieces
8810009560 Screw PH BO M2x6 ZK IC-4088SR Chassis 10 pieces
Addresses are provided on the inside back cover for your
convenience.
1. Make sure a problem is internal before disassembling the transceiver.
2. DO NOT open the transceiver until the transceiver is disconnected from its power source.
3. DO NOT force any of the variable components. Turn them slowly and smoothly.
4. DO NOT short any circuits or electronic parts. An insulated turning tool MUST be used for all adjustments.
5. DO NOT keep power ON for a long time when the transceiver is defective.
6. DO NOT transmit power into a signal generator or a sweep generator.
7. ALWAYS connect a 30 dB to 40 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when
using such test equipment.
8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver.
To upgrade quality, all electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
MODEL Antenna size SYMBOL
IC-4088SR Short
Long EUR
EUR-1
Icom, Icom Inc. and are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom,
Germany, France, Spain, Russia and/or other countries.

TABLE OF CONTENTS
SECTION 1 SPECIFICATIONS
SECTION 2 INSIDE VIEWS
SECTION 3 DISASSEMBLY INSTRUCTIONS
SECTION 4 CIRCUIT DESCRIPITON
4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-2 TRANSMITER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4-4 POWER SUPPLY CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-5 PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2 ADJUSTMENT MODE ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
SECTION 6 PARTS LIST
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY
7-1 CABINET PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7-2 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
SECTION 8 SEMI-CONDUCTOR INFORMATION
SECTION 9 BOARD LAYOUTS
9-1 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9-2 RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
SECTION 10 BLOCK DIAGRAM
SECTION 11 VOLTAGE DIAGRAM
11-1 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
11-2 RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

SECTION 1 SPECIFICATIONS
1 - 1
‘‘GENERAL
• Number of channel : 8 channels (simplex; 446.00625–446.09375 MHz)
• Type of emission : 8K50F3E (FM)
• Frequency stability : ±2500 Hz (±5.6 ppm)
• Frequency resolution : 12.5 kHz
• Antenna impedance : 50 Ω
• Power supply requirement (negative ground) : 3
× AA (R6) dry, alkaline; or BP-202 (optional Ni-Cd battery pack)
•Current drain : Less than 140 mA
•Operating temperature range : –20˚C to +55˚C
•Number of CTCSS frequency : 38 (67.0–250.3 Hz)
•Dimensions (projections not included) : 52.5
(W) × 102.5 (H) × 26.9 (D) mm
•Weight (included 3 cells) : 200 g (Approx.)
‘‘TRANSMITTER
•Output power : Less than 500 mW ERP
•Modulation system : Variable reactance frequency modulation
•Max. frequency deviation : ±2.5 kHz
•Spurious emissions : 0.25 µW
•Adjacent channel power : More than 60 dB
•External microphone connector : 3-conductor 2.5(d) mm/2.2 kΩ
‘‘RECEIVER
•Receiving system : Double conversion superheterodyne system
•Intermediate frequency : 1st; 21.7 MHz
2nd; 450 kHz
•Sensitivity (12 dB SINAD) : 0.25 µV; –12 dBµ
•Adjacent channel selectivity : More than 55 dB
•Spurious response : More than 65 dB
•Intermodulation : More than 60 dB
•Audio output power : 100mW at 10% distortion with an 8 Ωload
•External SP connector : 2-conductor 3.5(d) mm/8 Ω
All stated specifications are subject to change without notice or obligation.

1 - 2
‘‘CTCSS FREQUENCY LIST
Channel No.
1
2
3
4
Frequency (MHz)
446.00625
446.01875
446.03125
446.04375
Channel No.
5
6
7
8
Frequency (MHz)
446.05625
446.06875
446.08125
446.09375
‘‘CHANNEL FREQUENCY LIST
Channel No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Frequency (Hz)
67.0
71.9
74.4
77.0
79.7
82.5
85.4
88.5
91.5
94.8
97.4
100.0
103.5
Channel No.
14
15
16
17
18
19
20
21
22
23
24
25
26
Frequency (Hz)
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
162.2
Channel No.
27
28
29
30
21
32
33
34
35
36
37
38
–
Frequency (Hz)
167.9
173.8
179.9
186.2
192.8
203.5
210.7
218.1
225.7
233.6
241.8
250.3
OFF

SECTION 2 INSIDE VIEWS
•MAIN UNIT
2 - 1
•RF UNIT
R+3 Regulator
(Q304: 2SA1586)
+3 Regulator
(IC303: R1121N301B)
EEPROM
(IC300: BR24C02) CPU
(IC301: PD78F9407AGK)
Audio amplifier
(IC305: NJM2070)
T+3 Regulator
(Q308: 2SB798)
TOP VIEW BOTTOM VIEW
2nd IF filter
(Fl3: CFWM450G)
Reference oscillator
(X2: CR-669 21.25 MHz)
VCO circuit
RF amplifier
(Q1: 2SC4228)
BOTTOM VIEW
1st IF amplifier
(Q3: 2SC4215)
1st IF amplifier
(Fl2: FL-297)
1st mixer
(Q2: 2SK320)
PLL IC
(IC2: UPD3140GS)
FM IF IC
(IC1: TA31136FN)
TOP VIEW

SECTION 3 DISASSEMBLY INSTRUCTIONS
3 - 1
Rear panel
B
AB
C
D
F
G
Main unit
E
RF unit
Main unit
I
H
•REMOVING THE REAR PANEL
1Unscrew 1 screw A, and 5 screws B.
2Remove the rear panel in the direction of the arrow.
•REMOVING THE RF UNIT
1Unscrew 2 screws H.
2Unsolder 2 points I, and remove the RF unit.
•REMOVING THE MAIN UNIT
1Remove 1 knob C, unscrew 1 nut D, and then remove 1
ring E.
2Unscrew 1 screw F.
3Unsolder 2 points G, and remove the MAIN unit in the
direction of the arrow.

4 - 1
SECTION 4 CIRCUIT DESCRIPTION
4-1 RECEIVER CIRCUITS
4-1-1 ANTENNA SWITCHING CIRCUIT (RF UNIT)
Received signals from the antenna are passed through the
low-pass filter (L2, L3, C1–C5, C117). The filtered signals are
applied to the λ⁄4type antenna switching circuit (D1–D4,
L4–L6, C6–C11).
The antenna switching circuit functions as a low-pass filter
while receiving. However, its impedance becomes very high
while D3 and D4 are turned ON (while transmitting). Thus,
transmit signals are blocked from entering the receiver cir-
cuits. The passed signals are then applied to the RF amplifi-
er circuit.
4-1-2 RF CIRCUIT (RF UNIT)
The RF circuit amplifies signals within the range of frequen-
cy coverage and filters out-of-band signals.
The signals from the antenna switching circuit are amplified
at the RF amplifier (Q1) and passed through the bandpass fil-
ter (FI4) to suppress out-of-band signals. The filtered signals
are applied to the 1st mixer circuit (Q2).
4-1-3 1ST MIXER AND 1ST IF CIRCUITS (RF UNIT)
The 1st mixer circuit converts the received signals to a fixed
frequency of the 1st IF signal with a PLL output frequency. By
changing the PLL frequency, only desired signals will be
passed through a crystal filter at the next stage of the 1st
mixer.
The signals from the bandpass filter are mixed at the 1st
mixer circuit (Q2) with a 1st LO signal coming from the VCO
circuit to produce a 21.7 MHz 1st IF signal. The 1st IF signal
is applied to a crystal filter (FI2) to suppress out-of-band sig-
nals. The filtered 1st IF signal is applied to the IF amplifier
(Q3), and is then applied to the 2nd mixer circuit (IC1, pin
16).
4-1-4 2ND MIXER AND DEMODULATOR CIRCUITS
(RF UNIT)
The 2nd mixer circuit converts the 1st IF signal to a 2nd IF
signal. A double conversion superheterodyne system (which
converts receive signals twice) improves the image rejection
ratio and obtains stable receiver gain.
The 1st IF signal from the IF amplifier (Q3) is applied to the
2nd mixer section in the FM IF IC (IC1, pin 16), and is mixed
with the 2nd LO signal to be converted into a 450 kHz 2nd IF
signal.
The FM IF IC contains a 2nd mixer, quadrature detector,
noise amplifier and a limiter amplifier, etc. The PLL reference
oscillator (X2) is used for the 2nd LO signal via the PLL IC
(IC2, pins 16, 17), and is applied to pin 1 of the FM IF IC
(IC1).
The mixed 2nd IF signal is output from pin 3 and passed
through the ceramic bandpass filter (FI3) to remove unwant-
ed heterodyne frequencies. It is then amplified at the limiter
amplifier section (IC1, pin 5), and is applied to the quadrature
detector section (IC1, pins 10, 11) to demodulate the 2nd IF
signal into AF signals.
4-1-5 AF CIRCUIT (RF AND MAIN UNITS)
AF signals from the FM IF IC (RF unit; IC1, pin 9) are applied
to the MAIN unit via J300 pin 14.
The AF signal applied to the [VOL] control (MAIN unit; R406)
to control the audio level via the volume mute switch (MAIN
unit; Q316). The level controlled AF signals are applied to the
AF power amplifier (MAIN unit; IC305, pin 2) to drive an inter-
nal speaker (CHASSIS unit; SP1) via the [SP] jack (MAIN
unit; J301).
2nd
Mixer
16
Limiter
amp.
2nd IF filter
450 kHz PLL IC
IC2
X2
21.25 MHz
X1
(21.25 MHz)
RSSI
IC1 TA31136FN
14
1st IF (21.7 MHz)
from the IF amplifier (Q3)
"SQLIN" signal to the CPU
(MAIN unit; IC301, pin 46)
11109
87 5 3
AF signal "AF"
R+3
1
17
16
Active
filter
FI3
Noise
detector
FM
detector
C43
C42
C45
C48
C46
C47
R32
R27 R26
R34
R33
R28
R30
• 2ND IF AND DEMODULATOR CIRCUITS

4 - 2
4-1-6 SQUELCH CIRCUIT (RF AND MAIN UNITS)
(1) NOISE SQUELCH
The noise squelch circuit cuts out AF signals when no RF
signals are received. By detecting noise components in the
AF signals, the squelch circuit switches the AF mute switch.
A portion of the AF signals from the FM IF IC (RF unit; IC1,
pin 9) are applied to the active filter section (RF unit; IC1,
pin 8). The active filter section amplifies and filters noise
components. The filtered signals are applied to the noise
detector section and output from pin 14 as the “SQLIN”sig-
nal.
The “SQLIN”signal from IC1 (pin 14) on the RF unit passes
through J300, pin 12, and is then applied to the CPU (MAIN
unit; IC301, pin 46). The CPU analyzes the noise condition
and outputs the “RMUT”(from pin 64) and “AFON”(from pin
58) signals to toggle the AF mute (MAIN unit; Q316) and vol-
ume mute (MAIN unit; Q311) switches.
(2) TONE SQUELCH
The tone squelch circuit detects AF signals and opens the
squelch only when receiving a signal containing a matching
subaudible tone (CTCSS). When tone squelch is in use, and
a signal with a mismatched or no subaudible tone is
received, the tone squelch circuit mutes the AF signals even
when noise squelch is open.
A portion of the AF signals from the FM IF IC (RF unit; IC1,
pin 9) passes through the AF control (MAIN unit; IC304) to
control the volume mute and AF mute switches.
4-2 TRANSMITTER CIRCUITS
4-2-1 MICROPHONE AMPLIFIER CIRCUIT
(MAIN UNIT)
AF signals from the internal/external microphone are applied
to the microphone amplifier circuit and low-pass filter
(IC304) via the microphone switch (Q313). The filterd audio
signals are applied to the modulation circuit on the RF unit
via J300, pin 15 as the “MOD”signal.
4-2-2 MODULATION CIRCUIT (RF UNIT)
The filtered audio signals from J300, pin 15 (on the MAIN
unit) are applied to the modulation circuit (D8, D9) to modu-
late transmit signals at the VCO circuit (Q8).
The modulated signal is applied to the drive amplifier circuit.
4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS
(RF UNIT)
The drive/power amplifier circuit amplifies the VCO oscillat-
ing signal to the output power level.
The modulated transmit signal is amplified at the drive
amplifiers (Q5, Q6) after being amplified at the buffer ampli-
fiers (Q7, Q13). The amplified signal is amplified at the
power amplifier (Q4) to obtain 450 mW of RF power.
The signal is passed through the antenna switching circuit
(D1) and low-pass filter, and is then applied to the antenna.
4-3 PLL CIRCUITS (RF UNIT)
A PLL circuit provides stable oscillation of the transmit fre-
quency and receive 1st LO frequency. The PLL output com-
pares the phase of the divided VCO frequency to the refer-
ence frequency. The PLL output frequency is controlled by
the divided ratio (N-data) of a programmable divider.
The PLL circuit consists of the VCO circuit (Q8, D8, D9). An
oscillated signal from the VCO passes through the buffer
amplifier (Q7), and is applied to the PLL IC (IC2, pin19) to
prescale in the PLL IC based on the divided ratio (N-data).
The reference signal is generated at the reference oscillator
(X2), and is applied to the PLL IC. The PLL IC detects the
out-of-step phase using the reference frequency, and out-
puts detected signal from pin 14. The output signal is
passed through the loop filter (R44, C67) and is then applied
to the VCO circuit as lock voltage.
If the oscillated signal drifts, its phase changes from that of
the reference frequency, causing a lock voltage change to
compensate for the drift in the oscillated frequency.
Shift register
Prescaler
Phase
detector
Loop
filter
Programmable
counter
Programmable
divider
X2
21.25 MHz
to the FM IF IC
(IC1, pin1)
16
17 4
3
PLCK
DATA
PLSTB
to transmitter circuit
to 1st mixer circuit
D6
D7
13 19
IC2 UPD3140GS
Q8, D8, D9
VCO
Buffer
Q7
Buffer
Q13
5
•PLL CIRCUIT

Input port for the PLL unlock signal from
the PLL IC (RF unit; IC2).
Low : During unlock.
Input port for the PTT switch from the
external mic jack (MAIN unit; J303).
Low : External microphone PTT
switch is pushed.
Input port for the control signal from the
external remote microphone.
Input port for the transceiver’s internal
temperature.
Input port for the squelch level signal.
Input port for connected battery pack
voltage.
Input port for [MODE] switch.
Input port for [POWER] switch.
Low : While [POWER] switch is
pushed.
Outputs the beep audio signal.
Input port for [DOWN] switch.
Input port for [UP] switch.
Input port for the internal PTT switch.
Low : While [PTT] switch is pushed.
Outputs the control signal of LCD back
light.
Outputs the control signal of the AF
amplifier regulator circuit (MAIN unit;
Q306, Q307, Q311).
Outputs the control signal of the R+3
regulator circuit (MAIN unit; Q304).
Outputs the microphone mute signal
for RING function.
High : While RING signals are out-
put, etc.
Outputs the internal microphone con-
trol signal.
High : While the internal PTT switch
is pushed.
Outputs the control signal of the +3V
regulator circuit (MAIN unit; Q303,
D301).
Outputs the control signal of the vol-
ume mute switch (MAIN unit; Q316).
High : While squelched.
Outputs the control signal of the T+3
regulator circuit (Q305, Q308, D303,
D304).
Outputs the control signal of the charge
circuit (Q312, Q314, D305, D308).
Input port for the test mode switch.
Outputs the clock signal to the EEP-
ROM (MAIN unit; IC300).
Outputs the data signals to the EEP-
ROM (MAIN unit; IC300).
Input port for the control signal of the
tone detection
Outputs the shift control signal to the
PLL IC (RF unit; IC2).
Outputs the strobe signals to the PLL
IC (RF unit; IC2).
Outputs the clock signal to the PLL IC
(RF unit; IC2).
Outputs the data signals to the PLL IC
(RF unit; IC2).
27
31
32
33
35
36
37
38
TEST
EEPCK
EEPDA
DETOUT
SHIFT
PLSTB
CK
DATA
Pin Port Description
number name
Outputs the deviation control signal.
Outputs the TX power control signal.
Outputs the PLL reference frequency
control signal.
4 - 3
LINE
VCC
C3V
+3V
R+3
T+3
DESCRIPTION
The voltage from the connected battery or
power supply from DC IN (J302).
Common 3 V converted from the VCC line at the
+3V regulator circuit (IC303). The circuit outputs
the voltage regardless of the power ON/OFF
condition.
Common 3 V converted from the VCC line at the
+3V current amplifier (Q303, D301).
Receive 3 V controlled by the R+3 current
amplifier (Q304) using the “RXC”signal from the
CPU (IC301, pin 59).
Transmit 3 V converted from the VCC line at the
T+3 current amplifier (Q305, Q308, Q319,
D302, D303, D305) using the “TXC”signal from
the CPU (IC301, pin 65).
UNLK
PTT
MICIN
TEMP
SQLIN
VIN
MODE
POWSW
BEEP
DOWN
UP
PTTSW
LAMPO
AFON
RXV
MMUTE
MICSW
POWER
RMUTE
TXV
CHGC
Pin Port Description
number name
4-4 POWER SUPPLY CIRCUITS
VOLTAGE LINE
4-5 PORT ALLOCATIONS
4-5-1 D/A CONVERTER (RF unit; IC3)
1
2
3
MODC
PWRC
FC
Pin Port Description
number name
4-5-2 CPU (MAIN unit; IC301)
41
42
43
44
46
47
51
52
53
54
55
56
57
58
59
61
62
63
64
65
66

‘‘
ENTERING THEADJUSTMENT MODE
¡¡ Turn the transceiver’s power OFF.
™™ While connecting the “TEST”on the MAIN unit to “GND”, then turn power ON.
5 - 1
EQUIPMENT
DC power supply
RF power meter
(terminated type)
Frequency counter
SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION
•When adjusting the IC-4088SR, *HM-75A JIG MICROPHONE (modified HM-75A OPTIONAL SPEAKER-MICROPHONE; see illustration at
page5-2) is required.
•All adjustment items must be preformed at “ADJUSTMENT MODE”. (See below in detail)
‘‘REQUIRED TEST EQUIPMENT
GRADE AND RANGE
Output voltage : 4.5 V DC
Current capacity : 1 A or more
Measuring range : 1 mW–1 W
Frequency range : 300–600 MHz
Impedance : 50 Ω
SWR : Less than 1.2 : 1
Frequency range : 0.1–600 MHz
Frequency accuracy : ±1 ppm or better
Sensitivity : 100 mV or better
EQUIPMENT
FM deviation meter
Standard signal
generator (SSG)
AC millivoltmeter
Audio generator
GRADE AND RANGE
Frequency range : 30–600 MHz
Measuring range : 0 to ±10 kH
Frequency range : 0.1–600 MHz
Output level : 0.1 µV–32 mV
(–127 to –17 dBm)
Measuring range : 10 mV–10 V
Frequency range : 300–3000 Hz
Output level : 1–500 mV
CHANNEL NO.
1ch.
2ch.
3ch.
4ch.
5ch.
6ch.
7ch.
8ch.
FREQUENCY
446.00625 MHz
446.01875 MHz
446.03125 MHz
446.04375 MHz
446.05625 MHz
446.06875 MHz
446.08125 MHz
446.09375 MHz
• DISPLAYED CHANNEL’S FREQUENCY LIST
TEST
J1
RF
GND
J1
RF test port
ENTERING THE ADJUSTMENT MODE
qTurn the transceiver power OFF.
wWhile connecting the "TEST" to GND,
then turn power ON.

‘‘OPERATION ON THE ADJUSTMENT MODE
• Change the adjustment item : HM-75A’s [B] key
• Change the adjustment value : HM-75A’s [∫]/[√] keys
•Verify the adjustment value : HM-75A’s [A] key
•Change the adjustment channel : IC-4088SR’s [UP]/[DN] keys
•Change the adjustment group : IC-4088SR’s [MODE]+ [UP]/[DN] keys
‘‘ADJUSTMENT ITEMS
When entering adjustment mode, displayed adjustment items indicator on LCD as follow.
•Reference frequency adjustment : Displayed
•Output power adjustment : Displayed
•FM deviation adjustment : Displayed
•CTCSS adjustment : Displayed
•Squelch adjustment : Displayed
A
B
TEST
J1
to RF unit J1
DC power supply
4.5 V /1.0 A
Frequency
counter
FM deviation
meter
CAUTION:
DO NOT transmit while the SSG is
connected to the antenna.
RF power meter
50 Ω/ 1–1000 mW
to DC IN
Standard signal
generator
Lock
3.5(d) mm plug
SP
2.7 k
[A] [B]
6.8 k
[∫]
15 k
[√]
33 k
2.5(d) mm plug
PTT
(SP –)
(MIC +)
(MIC –)
(SP +)
*HM-75A
–
–
+
+
to [MIC] JACK
to [SP] JACK
Audio generator
AC millivoltmeter
33 k
5 - 2
‘‘CONNECTION

5 - 3
REFERENCE
FREQUENCY
[Fr]
OUTPUT
POWER
[PL]
FM DEVIATION
[dL]
CTCSS
MODULATION
[to]
SQUELCH
SENSITIVITY
[Sq]
446.09375 MHz
450 mW
± 2.05 kHz
± 0.30 kHz
Audio signal
disappears
•Operating channel : Ch 8
•Transmitting
•Operating channel : Ch 8
•Transmitting
•Operating channel : Ch 8
•Connect an audio generator to the [MIC]
jack and set as :1 kHz/100 mV rms
•Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz or 15 kHz
De-emphasis : OFF
Detector : (P–P)/2
•Set group No. : OFF (––)
•Transmitting
•Operating channel : Ch 1
•Set group No. : 24
•Transmitting
•Operating channel : Ch 1
•Connect an SSG to J1 on the RF unit and
set as:
Level : 0.13 µV*
(–125 dBm)
Modulation : OFF
•Receiving
•Set an SSG as:
Level : OFF
•Receiving
[∫]/[√]
[∫]/[√]
[∫]/[√]
[∫]/[√]
Verify
Loosely couple a fre-
quency counter to the
antenna.
Connect an RF power
meter to the RF test
port J1.
Connect an FM devia-
tion meter to the RF
test port J1.
speaker
5-2 ADJUSTMENT MODE ADJUSTMENTS
The following adjustment must be performed at “ADJUSTMENT MODE”.
ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT VALUE HM-75A’s KEY
1
1
1
2
1
2
•Squelch sensitivity is adjusted
automatically when HM-75A’s
[A] button is pushed.

[MAIN UNIT][MAIN UNIT]
IC300 1130011230 S.IC BR24C02FV-WE2 T
IC301 1140011430 S.IC
µPD789407AGK-A81-9EU (FX2624A3) B
IC302 1110005820 S.IC R3112N281A-TR T
IC303 1180002430 S.REG R1121N301B-TR T
IC304 1130007382 S.IC AK2342B T
IC305 1110002810 S.IC NJM2070M-T1 T
Q302 1590001330 S.TRANSISTOR DTA114EUA T106 B
Q303 1590002490 S.TRANSISTOR UMZ2N TR T
Q304 1510000770 S.TRANSISTOR 2SA1586-GR (TE85R) T
Q305 1530002690 S.TRANSISTOR 2SC4116-GR (TE85R) B
Q306 1530002690 S.TRANSISTOR 2SC4116-GR (TE85R) T
Q307 1510000580 S.TRANSISTOR 2SA1362-GR (TE85R) T
Q308 1520000200 S.TRANSISTOR 2SB798-T2 DK B
Q309 1590001050 S.TRANSISTOR DTC114TUA T106 T
Q310 1590001040 S.TRANSISTOR DTA113ZU T106 T
Q311 1530003090 S.TRANSISTOR 2SC4213-B (TE85R) B
Q312 1590000430 S.TRANSISTOR DTC144EUA T106 T
Q313 1560000840 S.FET 2SK1829 (TE85R) T
Q314 1520000450 S.TRANSISTOR 2SB1132 T100 Q T
Q315 1590002950 S.FET HAT1023R-EL T
Q316 1590001390 S.FET 2SJ144-Y (TE85R) B
Q317 1590000430 S.TRANSISTOR DTC144EUA T106 T
Q318 1590000850 S.TRANSISTOR DTC114YUA T106 T
Q319 1590001650 S.TRANSISTOR XP4601 (TX) B
D301 1790001250 S.DIODE MA2S111-(TX) T
D302 1790001250 S.DIODE MA2S111-(TX) B
D303 1790001250 S.DIODE MA2S111-(TX) B
D305 1790000670 S.DIODE SB07-03C-TB T
D306 1750000880 S.DIODE RB551V-30TE-17 B
D307 1790001240 S.DIODE MA2S728-(TX) B
D308 1790000860 S.DIODE MA133 (TX) T
D310 1790001250 S.DIODE MA2S111-(TX) T
D313 1790001250 S.DIODE MA2S111-(TX) T
D314 1790001250 S.DIODE MA2S111-(TX) T
D317 1790001250 S.DIODE MA2S111-(TX) T
D318 1750000880 S.DIODE RB551V-30TE-17 T
X300 6050008860 S.XTAL CR-465 (3.6864 MHz) B
R300 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R301 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R304 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) B
R305 7030009290 S.RESISTOR ERJ2GEJ 562 X (5.6 kΩ) B
R307 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R308 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) T
R327 7030005700 S.RESISTOR ERJ2GEJ 274 X (270 kΩ) B
R328 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R329 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) T
R330 7030003880 S.RESISTOR ERJ3GEYJ 244 V (240 kΩ) T
R331 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R332 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) T
R333 7030009290 S.RESISTOR ERJ2GEJ 562 X (5.6 kΩ) B
R334 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) B
R335 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) B
R338 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) B
R340 7030008410 S.RESISTOR ERJ2GEJ 392 X (3.9 kΩ) B
R343 7030005590 S.RESISTOR ERJ2GEJ 680 X (68 Ω) B
R344 7030005720 S.RESISTOR ERJ2GEJ 563 X (56 kΩ) T
R345 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R346 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) T
R347 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) T
R348 7030003880 S.RESISTOR ERJ3GEYJ 244 V (240 kΩ) T
R349 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) B
R350 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) B
R356 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) T
R357 7030005720 S.RESISTOR ERJ2GEJ 563 X (56 kΩ) T
R358 7030005720 S.RESISTOR ERJ2GEJ 563 X (56 kΩ) T
R359 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R360 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R361 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) T
R362 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R364 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R365 7510001440 S.THERMISTOR NTCG16 3NH 221KT T
R366 7030009140 S.RESISTOR ERJ2GEJ 272 X (2.7 kΩ) T
R368 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) T
S.=Surface mount
R369 7030007570 S.RESISTOR ERJ2GEJ 122X (1.2 kΩ) B
R373 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) T
R374 7030009140 S.RESISTOR ERJ2GEJ 272 X (2.7 kΩ) T
R375 7030007310 S.RESISTOR ERJ2GEJ 155 X (1.5 MΩ) T
R376 7030007570 S.RESISTOR ERJ2GEJ 122X (1.2 kΩ) T
R377 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) B
R378 7030005230 S.RESISTOR ERJ2GEJ 334 X (330 kΩ) T
R379 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) B
R381 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) T
R382 7030008010 S.RESISTOR ERJ2GEJ 123 X (12 kΩ) T
R383 7030005710 S.RESISTOR ERJ2GEJ 121 X (120 Ω) T
R384 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R385 7030004050 S.RESISTOR ERJ3GEYJ 1R0 V (1 Ω) T
R386 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) T
R387 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R388 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) T
R389 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) T
R390 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B
R391 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R392 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R393 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) T
R394 7030009290 S.RESISTOR ERJ2GEJ 562 X (5.6 kΩ) T
R395 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R396 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) T
R397 7030000130 S.RESISTOR MCR10EZHJ 8.2 Ω(8R2) T
R399 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) T
R400 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R401 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B
R402 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) T
R403 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) B
R404 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) B
R405 7030004980 S.RESISTOR ERJ2GEJ 101 X (100 Ω) B
R406 7210001970 VARIABLE RV-244 (RK0971110) 10KA T
R409 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R410 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B
R411 7030008280 S.RESISTOR ERJ2GEJ 271 X (270 Ω) B
R412 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R413 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R414 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R415 7510001660 S.THRMISTOR NTCG16 4LH 473KT B
R416 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B
R417 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) T
R418 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R419 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R420 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) T
R421 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R422 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) B
R423 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) T
R424 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) B
R426 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) T
R427 7030007320 S.RESISTOR ERJ2GEJ 225 X (2.2 MΩ) B
R428 7030007060 S.RESISTOR ERJ2GEJ 684X (680 kΩ) T
R430 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) T
R431 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) T
R432 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) T
R433 7030005600 S.RESISTOR ERJ2GEJ 273 X (27 kΩ) T
C300 4030017410 S.CERAMIC ECJ0EC1H240J B
C301 4030017410 S.CERAMIC ECJ0EC1H240J B
C303 4030016790 S.CERAMIC ECJ0EB1C103K B
C304 4030016930 S.CERAMIC ECJ0EB1A104K T
C311 4030016930 S.CERAMIC ECJ0EB1A104K B
C312 4030016930 S.CERAMIC ECJ0EB1A104K T
C313 4030017430 S.CERAMIC ECJ0EC1H101J B
C314 4030016930 S.CERAMIC ECJ0EB1A104K T
C315 4550006620 S.TANTALUM ECST0JY226R T
C316 4030009660 S.CERAMIC C1608 JF 1C 224Z-T B
C317 4030016930 S.CERAMIC ECJ0EB1A104K T
C319 4030016930 S.CERAMIC ECJ0EB1A104K T
C320 4030008680 S.CERAMIC C2012 JF 1C 105Z-T T
C321 4030008680 S.CERAMIC C2012 JF 1C 105Z-T B
C323 4030017040 S.CERAMIC ECJ0EB1A333K T
C324 4030016930 S.CERAMIC ECJ0EB1A104K T
C325 4030008680 S.CERAMIC C2012 JF 1C 105Z-T B
C326 4030008680 S.CERAMIC C2012 JF 1C 105Z-T B
C327 4030017720 S.CERAMIC ECJ0EB1H331K T
C328 4510005900
S.ELECTROLYTIC ECEV0GA101SR T
C329 4030017420 S.CERAMIC ECJ0EC1H470J T
C330 4030016930 S.CERAMIC ECJ0EB1A104K T
C331 4030016930 S.CERAMIC ECJ0EB1A104K T
6 - 1
SECTION 6 PARTS LIST
REF ORDER DESCRIPTION M.
NO. NO.
REF ORDER DESCRIPTION M.
NO. NO.
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

[MAIN UNIT]
C332 4030017460 S.CERAMIC ECJ0EB1E102K T
C333 4030017730 S.CERAMIC ECJ0EB1E471K T
C334 4030016930 S.CERAMIC ECJ0EB1A104K T
C335 4030017440 S.CERAMIC ECJ0EC1H221J T
C336 4030017450 S.CERAMIC ECJ0EB1E271K T
C337 4030011810 S.CERAMIC C1608 JB 1A 224K-T T
C338 4030017730 S.CERAMIC ECJ0EB1E471K B
C339 4030017720 S.CERAMIC ECJ0EB1H331K T
C340 4030008680 S.CERAMIC C2012 JF 1C 105Z-T T
C341 4030008680 S.CERAMIC C2012 JF 1C 105Z-T B
C343 4550006390 S.TANTALUM TEESVA 1C 335M8L T
C344 4030016950 S.CERAMIC ECJ0EB1A473K T
C345 4030017730 S.CERAMIC ECJ0EB1E471K T
C346 4030017430 S.CERAMIC ECJ0EC1H101J T
C347 4510004630 S.ELECTROLYTIC ECEV1CA100SR T
C348 4510005860 S.ELECTROLYTIC ECEV1HA2R2SR T
C349 4030017460 S.CERAMIC ECJ0EB1E102K B
C350 4030016930 S.CERAMIC ECJ0EB1A104K B
C351 4030016930 S.CERAMIC ECJ0EB1A104K T
C352 4030016930 S.CERAMIC ECJ0EB1A104K B
C354 4510005430 S.ELECTROLYTIC ECEV0JA220SR T
C355 4030017780 S.CERAMIC ECJ0EB1E472K T
C356 4030016930 S.CERAMIC ECJ0EB1A104K T
C357 4030017730 S.CERAMIC ECJ0EB1E471K T
C358 4550006880 S.TANTALUM TEESVD2 0J 157M12R T
C359 4030017720 S.CERAMIC ECJ0EB1H331K T
C360 4030017460 S.CERAMIC ECJ0EB1E102K T
C361 4030017730 S.CERAMIC ECJ0EB1E471K T
C362 4030016930 S.CERAMIC ECJ0EB1A104K B
C363 4030017460 S.CERAMIC ECJ0EB1E102K T
C364 4550006250 S.TANTALUM TEESVA 1A 106M8L T
C365 4030016930 S.CERAMIC ECJ0EB1A104K B
C366 4030016930 S.CERAMIC ECJ0EB1A104K T
C367 4030017730 S.CERAMIC ECJ0EB1E471K T
C368 4030017720 S.CERAMIC ECJ0EB1H331K B
C369 4030017730 S.CERAMIC ECJ0EB1E471K T
C371 4030017720 S.CERAMIC ECJ0EB1H331K B
C372 4030016930 S.CERAMIC ECJ0EB1A104K T
C373 4030017460 S.CERAMIC ECJ0EB1E102K T
C374 4030017420 S.CERAMIC ECJ0EC1H470J B
C375 4030017730 S.CERAMIC ECJ0EB1E471K T
C376 4550006250 S.TANTALUM TEESVA 1A 106M8L T
C377 4030017720 S.CERAMIC ECJ0EB1H331K T
C378 4030016930 S.CERAMIC ECJ0EB1A104K B
C379 4030017730 S.CERAMIC ECJ0EB1E471K T
C380 4030017730 S.CERAMIC ECJ0EB1E471K T
C381 4030017730 S.CERAMIC ECJ0EB1E471K B
C382 4030016790 S.CERAMIC ECJ0EB1C103K B
C383 4030016930 S.CERAMIC ECJ0EB1A104K B
C384 4030016790 S.CERAMIC ECJ0EB1C103K T
C385 4030017460 S.CERAMIC ECJ0EB1E102K B
C386 4030017460 S.CERAMIC ECJ0EB1E102K B
C387 4030017460 S.CERAMIC ECJ0EB1E102K B
C388 4030017460 S.CERAMIC ECJ0EB1E102K B
C389 4030016930 S.CERAMIC ECJ0EB1A104K T
C390 4030008680 S.CERAMIC C2012 JF 1C 105Z-T T
C392 4030017460 S.CERAMIC ECJ0EB1E102K B
C393 4030017460 S.CERAMIC ECJ0EB1E102K B
C394 4030017460 S.CERAMIC ECJ0EB1E102K B
C395 4030017460 S.CERAMIC ECJ0EB1E102K B
C396 4030017460 S.CERAMIC ECJ0EB1E102K B
C397 4030016930 S.CERAMIC ECJ0EB1A104K T
C398 4030017720 S.CERAMIC ECJ0EB1H331K T
C399 4030017790 S.CERAMIC ECJ0EB1E682K T
C400 4030017460 S.CERAMIC ECJ0EB1E102K B
C401 4030017780 S.CERAMIC ECJ0EB1E472K T
C402 4030016780 S.CERAMIC ECJ0EB1C153K B
J300 6510023500 S.CONNECTOR AXK6S20545P T
J301 6450001060 CONNECTOR HSJ1493-01-010 T
J302 6450002130 CONNECTOR 04-730A2-02BKA T
J303 6450000130 CONNECTOR HSJ1102-01-540 T
DS300 5030002520 LCD L2-0494TAY B
DS301 5040002230 S.LED CL-200YG-C-TS B
MC300 7700002160 MICROPHON KUC3523-040245 B
S304 2260001900 SWITCH SW-149 (SKHLLD) T
W300 7030010040 S.RESISTOR ERJ2GE-JPW T
W301 7030010040 S.RESISTOR ERJ2GE-JPW B
W302 7120000470 JUMPER ERDS2T0 T
S.=Surface mount
6 - 2
REF ORDER DESCRIPTION M.
NO. NO.
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)
[MAIN UNIT]
W305 7030010040 S.RESISTOR ERJ2GE-JPW T
W307 7030010040 S.RESISTOR ERJ2GE-JPW B
EP1 0910056431 PCB B 6003A
EP300 6910012350 S.BEAD MMZ1608Y 102BT B
EP301 6910014690 S.BEAD MPZ1608S221A-T B
EP302 6910014690 S.BEAD MPZ1608S221A-T B
EP303 6910012350 S.BEAD MMZ1608Y 102BT B
EP304 6910012350 S.BEAD MMZ1608Y 102BT B
EP305 6910012350 S.BEAD MMZ1608Y 102BT B
EP306 6910012350 S.BEAD MMZ1608Y 102BT B
EP307 6910012350 S.BEAD MMZ1608Y 102BT B
EP308 6910012350 S.BEAD MMZ1608Y 102BT B
EP309 8930059580 LCD CONTACT SRCN-2628-SP-N-W B
IC1 1110003490 S.IC TA31136FN (D,EL) B
IC2 1130007610 S.IC µPD3140GS-E1 (DS8) B
IC3 1190001830 S.IC BH2220FVM-TR T
Q1 1530002930 S.TRANSISTOR 2SC4228 (M) -T1 R45 T
Q2 1580000740 S.FET 3SK320 (TE85L) B
Q3 1530002600 S.TRANSISTOR 2SC4215-O (TE85R) B
Q4 1560001270 S.FET 2SK3078A (TE12L) B
Q5 1530000370 S.TRANSISTOR 2SC3356-T1B B
Q6 1530002940 S.TRANSISTOR 2SC4228-T1 R44 B
Q7 1530003320 S.TRANSISTOR 2SC5108-Y (TE85R) T
Q8 1530003320 S.TRANSISTOR 2SC5108-Y (TE85R) T
Q9 1530003010 S.TRANSISTOR 2SC4117-GR (TE85R) T
Q10 1510000770 S.TRANSISTOR 2SA1586-GR (TE85R) T
Q11 1530002690 S.TRANSISTOR 2SC4116-GR (TE85R) T
Q12 1590001450 S.FET 2SJ144-GR (TE85R) T
Q13 1530002920 S.TRANSISTOR 2SC4226-T1 R25 B
Q14 1530003090 S.TRANSISTOR 2SC4213-B (TE85R) T
D1 1790001620 S.DIODE 1SV308 (TPL3) B
D2 1790001620 S.DIODE 1SV308 (TPL3) T
D3 1790001620 S.DIODE 1SV308 (TPL3) T
D4 1790001620 S.DIODE 1SV308 (TPL3) T
D5 1790001240 S.DIODE MA2S728-(TX) B
D6 1790001260 S.DIODE MA2S077-(TX) B
D7 1790001260 S.DIODE MA2S077-(TX) B
D8 1720000640 S.VARICAP 1SV284 (TPH3) T
D9 1720000640 S.VARICAP 1SV284 (TPH3) T
D10 1790001250 S.DIODE MA2S111-(TX) T
D11 1790001250 S.DIODE MA2S111-(TX) T
D12 1750000770 S.VARICAP HVC376BTRF T
FI2 2010002320 MONOLITH FL-297 (21.700 MHz) B
FI3 2020001410 CERAMIC CFWLB450KGFA-B0 T
FI4 2040001580 S.SAW NSVS647 T
X1 6070000190 S.DISCRIMINATOR CDBCB450KCAY24-R0 T
X2 6050010900 S.XTAL CR-669 (21.2500 MHz) T
L2 6200008270 S.COIL 0.26-1.0-5TL 17N B
L3 6200008270 S.COIL 0.26-1.0-5TL 17N B
L4 6200005710 S.COIL ELJRE 27NG-F B
L5 6200001650 S.COIL ELJNC 18NK-F T
L6 6200002470 S.COIL ELJNC 12NK-F T
L7 6200009980 S.COIL C2012C-18NG T
L8 6200005710 S.COIL ELJRE 27NG-F B
L9 6200003280 S.COIL NL 252018T-2R2J B
L10 6200004480 S.COIL MLF1608D R82K-T B
L11 6200010500 S.COIL 0.3-1.1-3TR 9.5N B
L12 6200008680 S.COIL 0.26-0.8-3TR 6.8N B
L13 6200005720 S.COIL ELJRE 33NG-F B
L14 6200005700 S.COIL ELJRE 22NG-F B
L15 6200005700 S.COIL ELJRE 22NG-F B
L18 6200003640 S.COIL MLF1608E 100K-T T
L19 6200007000 S.COIL ELJRE 82NG-F T
L20 6200005720 S.COIL ELJRE 33NG-F T
L21 6200002350 S.COIL LQW31HN27NJ01L T
REF ORDER DESCRIPTION M.
NO. NO.
REF ORDER DESCRIPTION M.
NO. NO.
[RF UNIT]

[RF UNIT][RF UNIT]
L22 6200003640 S.COIL MLF1608E 100K-T T
L23 6200003640 S.COIL MLF1608E 100K-T T
L24 6200005720 S.COIL ELJRE 33NG-F B
L25 6200006980 S.COIL ELJRE R10G-F B
L26 6200005710 S.COIL ELJRE 27NG-F B
L28 6200005670 S.COIL ELJRE 12NG-F B
R1 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) T
R2 7030009200 S.RESISTOR ERJ2GEJ 390 X (39 Ω) T
R3 7030004970 S.RESISTOR ERJ2GEJ 470 X (47 Ω) T
R4 7030005230 S.RESISTOR ERJ2GEJ 334 X (330 kΩ) B
R5 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) B
R6 7030008370 S.RESISTOR ERJ2GEJ 561 X (560 Ω) B
R7 7030007280 S.RESISTOR ERJ2GEJ 331 X (330 Ω) B
R8 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) B
R9 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) B
R10 7030009270 S.RESISTOR ERJ2GEJ 821 X (820 Ω) B
R11 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) B
R12 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) B
R14 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) B
R17 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) B
R18 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) B
R19 7030005590 S.RESISTOR ERJ2GEJ 680 X (68 Ω) B
R20 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) B
R21 7030005010 S.RESISTOR ERJ2GEJ 681 X (680 Ω) B
R22 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) B
R26 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R27 7030008370 S.RESISTOR ERJ2GEJ 561 X (560 Ω) T
R28 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R30 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) T
R32 7030008310 S.RESISTOR ERJ2GEJ 564 X (560 kΩ) T
R33 7030007290 S.RESISTOR ERJ2GEJ 222 X (2.2 kΩ) T
R34 7030005030 S.RESISTOR ERJ2GEJ 152 X (1.5 kΩ) B
R35 7030004990 S.RESISTOR ERJ2GEJ 221 X (220 Ω) T
R36 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) T
R37 7030005010 S.RESISTOR ERJ2GEJ 681 X (680 Ω) T
R38 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) T
R39 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) T
R40 7030005570 S.RESISTOR ERJ2GEJ 820 X (82 Ω) T
R41 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) T
R43 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) B
R44 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) B
R46 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) B
R48 7030010090 S.RESISTOR ERJ2GEJ 180 X (18 Ω) T
R49 7030005720 S.RESISTOR ERJ2GEJ 563 X (56 kΩ) T
R50 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) T
R51 7030005530 S.RESISTOR ERJ2GEJ 100 X (10 Ω) T
R64 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) B
R65 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R66 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R67 7030007300 S.RESISTOR ERJ2GEJ 332 X (3.3 kΩ) T
R68 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
R69 7030005160 S.RESISTOR ERJ2GEJ 105 X (1 MΩ) T
R70 7510001490 S.THERMISTOR NTCG16 3NH 681KT T
R71 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) B
R72 7030005080 S.RESISTOR ERJ2GEJ 823 X (82 kΩ) B
R73 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) B
R74 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) T
R75 7030008280 S.RESISTOR ERJ2GEJ 271 X (270 Ω) B
R76 7030008410 S.RESISTOR ERJ2GEJ 392 X (3.9 kΩ) B
R77 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) B
R78 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) T
R79 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) T
R80 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) T
R81 7030007250 S.RESISTOR ERJ2GEJ 220 X (22 Ω) B
R82 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) T
R83 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) T
C1 4030006980 S.CERAMIC C1608 CH 1H 070D-T B
C2 4030006970 S.CERAMIC C1608 CH 1H 060D-T B
C3 4030009510 S.CERAMIC C1608 CH 1H 010B-T B
C4 4030007020 S.CERAMIC C1608 CH 1H 120J-T B
C5 4030009560 S.CERAMIC C1608 CH 1H R75B-T B
C6 4030006980 S.CERAMIC C1608 CH 1H 070D-T B
C7 4030006980 S.CERAMIC C1608 CH 1H 070D-T B
C8 4030007050 S.CERAMIC C1608 CH 1H 220J-T B
C9 4030017580 S.CERAMIC ECJ0EC1H060C T
C10 4030017590 S.CERAMIC ECJ0EC1H070C T
C11 4030017400 S.CERAMIC ECJ0EC1H220J T
C12 4030006850 S.CERAMIC C1608 JB 1H 471K-T T
C13 4030017730 S.CERAMIC ECJ0EB1E471K B
C14 4030017570 S.CERAMIC ECJ0EC1H040B T
C15 4030017730 S.CERAMIC ECJ0EB1E471K T
C16 4030017640 S.CERAMIC ECJ0EC1H150J B
C18 4030016950 S.CERAMIC ECJ0EB1A473K B
C19 4030017730 S.CERAMIC ECJ0EB1E471K B
S.=Surface mount
C20 4030017730 S.CERAMIC ECJ0EB1E471K B
C21 4030017630 S.CERAMIC ECJ0EC1H120J B
C22 4030017600 S.CERAMIC ECJ0EC1H080C B
C23 4030017460 S.CERAMIC ECJ0EB1E102K B
C24 4030016950 S.CERAMIC ECJ0EB1A473K B
C25 4030017730 S.CERAMIC ECJ0EB1E471K B
C26 4030006970 S.CERAMIC C1608 CH 1H 060D-T B
C27 4030006980 S.CERAMIC C1608 CH 1H 070D-T B
C28 4030017460 S.CERAMIC ECJ0EB1E102K B
C29 4030017460 S.CERAMIC ECJ0EB1E102K B
C30 4030017660 S.CERAMIC ECJ0EC1H330J B
C31 4030017660 S.CERAMIC ECJ0EC1H330J B
C32 4030017590 S.CERAMIC ECJ0EC1H070C B
C33 4030017730 S.CERAMIC ECJ0EB1E471K B
C34 4030017730 S.CERAMIC ECJ0EB1E471K B
C35 4030017380 S.CERAMIC ECJ0EC1H050B B
C36 4030017730 S.CERAMIC ECJ0EB1E471K B
C37 4030017350 S.CERAMIC ECJ0EC1H020B B
C38 4030017730 S.CERAMIC ECJ0EB1E471K B
C39 4550006300 S.TANTALUM ECST1AY475R T
C42 4030017730 S.CERAMIC ECJ0EB1E471K T
C43 4030017730 S.CERAMIC ECJ0EB1E471K T
C44 4030016930 S.CERAMIC ECJ0EB1A104K T
C45 4030017730 S.CERAMIC ECJ0EB1E471K B
C46 4030017400 S.CERAMIC ECJ0EC1H220J T
C47 4030017510 S.CERAMIC ECJ0EC1H680J T
C48 4030016950 S.CERAMIC ECJ0EB1A473K B
C49 4510004630
S.ELECTROLYTIC ECEV1CA100SR T
C50 4030017350 S.CERAMIC ECJ0EC1H020B T
C51 4030017530 S.CERAMIC ECJ0EC1H0R5B T
C52 4030017350 S.CERAMIC ECJ0EC1H020B T
C53 4030017350 S.CERAMIC ECJ0EC1H020B T
C54 4030017730 S.CERAMIC ECJ0EB1E471K T
C55 4030017550 S.CERAMIC ECJ0EC1H1R5B T
C56 4030017620 S.CERAMIC ECJ0EC1H100C T
C57 4030017630 S.CERAMIC ECJ0EC1H120J T
C58 4030017730 S.CERAMIC ECJ0EB1E471K T
C59 4510004650
S.ELECTROLYTIC ECEV1EA4R7SR T
C60 4030009660 S.CERAMIC C1608 JF 1C 224Z-T T
C61 4030017380 S.CERAMIC ECJ0EC1H050B B
C62 4030016950 S.CERAMIC ECJ0EB1A473K B
C63 4030017730 S.CERAMIC ECJ0EB1E471K B
C64 4030017460 S.CERAMIC ECJ0EB1E102K B
C66 4340000180 S.MYLAR ECHU 1C 333JB5 B
C67 4550006150 S.TANTALUM ECST1CY105R B
C70 4030017390 S.CERAMIC ECJ0EC1H180J T
C71 4030008190 S.CERAMIC C1608 UJ 1H 040C-T T
C72 4030017460 S.CERAMIC ECJ0EB1E102K B
C73 4030016790 S.CERAMIC ECJ0EB1C103K B
C74 4030017730 S.CERAMIC ECJ0EB1E471K T
C75 4510005430 S.ELECTROLYTIC ECEV0JA220SR T
C76 4030016930 S.CERAMIC ECJ0EB1A104K T
C77 4030009660 S.CERAMIC C1608 JF 1C 224Z-T T
C85 4030009660 S.CERAMIC C1608 JF 1C 224Z-T T
C86 4030016950 S.CERAMIC ECJ0EB1A473K B
C87 4030016930 S.CERAMIC ECJ0EB1A104K B
C88 4030008680 S.CERAMIC C2012 JF 1C 105Z-T T
C89 4030017400 S.CERAMIC ECJ0EC1H220J B
C90 4030017340 S.CERAMIC ECJ0EC1H010B B
C91 4030017610 S.CERAMIC ECJ0EC1H090C T
C92 4030017460 S.CERAMIC ECJ0EB1E102K T
C98 4030017460 S.CERAMIC ECJ0EB1E102K T
C99 4030017460 S.CERAMIC ECJ0EB1E102K B
C101 4030016930 S.CERAMIC ECJ0EB1A104K T
C102 4030016930 S.CERAMIC ECJ0EB1A104K T
C103 4030017730 S.CERAMIC ECJ0EB1E471K B
C104 4030017730 S.CERAMIC ECJ0EB1E471K T
C106 4340000180 S.MYLAR ECHU 1C 333JB5 T
C108 4030017550 S.CERAMIC ECJ0EC1H1R5B B
C109 4030017730 S.CERAMIC ECJ0EB1E471K B
C110 4030017580 S.CERAMIC ECJ0EC1H060C B
C111 4030017620 S.CERAMIC ECJ0EC1H100C B
C112 4030017570 S.CERAMIC ECJ0EC1H040B B
C113 4030017460 S.CERAMIC ECJ0EB1E102K B
C114 4030017730 S.CERAMIC ECJ0EB1E471K B
C117 4030009560 S.CERAMIC C1608 CH 1H R75B-T B
C118 4030017540 S.CERAMIC ECJ0EC1HR75B T
C119 4030017360 S.CERAMIC ECJ0EC1H030B T
C120 4030017580 S.CERAMIC ECJ0EC1H060C T
C121 4510004630 S.ELECTROLYTIC ECEV1CA100SR T
C122 4030017360 S.CERAMIC ECJ0EC1H030B B
J1 6510016890 CONNECTOR IMSA-9210B-1-02R-T T
J2 6510023490 S.CONNECTOR AXK5S20340P B
W4 7030010040 S.RESISTOR ERJ2GE-JPW T
6 - 3
REF ORDER DESCRIPTION M.
NO. NO.
REF ORDER DESCRIPTION M.
NO. NO.
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)

[RF UNIT]
W5 7030010040 S.RESISTOR ERJ2GE-JPW B
W6 7030010040 S.RESISTOR ERJ2GE-JPW B
W7 7030003860 S.RESISTOR ERJ3GE JPW V B
W8 7030010040 S.RESISTOR ERJ2GE-JPW B
EP1 0910056422 PCB B 5925B
EP2 6910013310 S.BEAD MMZ1608D121B B
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)
S.=Surface mount
6 - 4
REF ORDER DESCRIPTION M.
NO. NO.

SP1 2510001120 Speaker SDRS-3650P-008 1
EP1 3310003060 Antenna 2628 ANT [EUR] 1
3310003120 Antenna 2628 SHORT ANT M [EUR-1] 1
MP1 8210019370 2628 Front panel 1
MP2 8110007900 2628 Rear cover 1
MP3 8210019380 2628 Rear panel 1
MP4 8310054740 2628 Window plate 1
MP5 8930059220 2628 Window sheet 1
MP6 8930059210 2628 SP JACK CAP 1
MP7 8610011270 Knob N-296 1
MP8 8930059240 2628 4-key 1
MP9 8930059250 2628 PTT rubber 1
MP10 8930059260 2628 A-terminal 1
MP11 8930059270 2628 B-terminal 1
MP12 8930059280 2628 Detect button 1
MP13 8930059550 2628 PTT sheet 1
MP14 8110007910 2628 Lock cover 1
MP15 8930059290 O-ring (AU) 1
MP16 8930059590 O-ring (AV) 1
MP17 8930045220 2045 BATT seal 1
MP19 8930045370 2045 C-terminal 2
MP20 8810008750 Screw PH B0 2x15 ZK (BT) 1
MP22 8930058310 2605 DC cap 1
MP25 8830000550 Nut (E) 1
MP32 8810009560 Screw PH B0 2x6 ZK (BT) 5
MP33 8810008620 Screw PH B0 2x20 ZK (BT) 1
MP35 8930059600 2628 Mic rubber 1
MP36 8930059610 Sponge (HC) 1
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY
7 - 1
Screw abbreviations B0, BT: Self-tapping
PH: Pan head
ZK: Black
REF. NO. ORDER NO. DESCRIPTION QTY.
7-1 CABINET PARTS
[CHASSIS PARTS]
REF. NO. ORDER NO. DESCRIPTION QTY.
[MAIN UNIT]
R406 7210001970 RV-244 1
J301 6450001060 HSJ1493-01-01 1
J302 6450002130 04-730A-02BKA 1
J303 6450000130 HSJ1102-01-540 1
DS300 5030002520 LCD L2-0494TAY 1
MC300 7700002160 KUC3523-040245 1
S304 2260001900 SW-149 1
EP303 6910012350 LCD contact SRCN-2045-SP-N-W 1
MP301 8210019390 2628 Reflector 1
MP302 8930060120 2628 LCD holder 1
MP303 8810004890 Screw PH 2x6 ZK 2
MP304 8010019180 2628 CHASSIS 1
MP1 8930045332 2045 Belt clip-2 1
REF. NO. ORDER NO. DESCRIPTION QTY.
REF. NO. ORDER NO. DESCRIPTION QTY.
[RF UNIT]
MP1 8510011570 2405 VCO case 1
7-2 ACCESSORIES
MP1

7 - 2
UNIT abbreviation (C): CHASSIS PARTS, (RF): RF UNIT, (M): MAIN UNIT
MP15 (C)
MP16 (C)
MP25 (C)
MP7 (C)
MP6 (C)
MP8 (C)
MP4 (C)
MP3 (C)
MP36 (C)
MP33 (C)
MP32 (C)
MP32 (C)
MP20 (C)
MP2 (C)
MP14 (C)
MP12 (C)
MP302 (M)
MP303 (M)
EP303 (M)
DS300 (M)
MP301 (M)
MAIN Unit
RF Unit
MP1 (C)
SP1 (C)
MP22 (C)
MP18 (C)
MP35 (C)
MP304 (M)
MP17 (C)
MP9 (C)
MP13 (C)
MP1 (RF)
MP32 (C)
MP5 (C)
S304 (M)
J302 (M)
MC300 (M)
R406 (M)
J301 (M)
J303 (M)
MP11 (C)
MP10 (C)
MP19 (C)
MP39 (C)
EP1 (C)
M
L: for IC-4088E
M: for IC-4088SR
H: for IC-4088S or IC-4088A
NOTE: See the marking when verifing short antenna type.
Antenna marking here.
Back side

SECTION 8 SEMI-CONDUCTOR INFORMATION
8 - 1
• DIODES
• TRANSISTOR AND FET’S
2SA1362 GR
(Symbol: AEG)
2SC4213 B
(Symbol: AB)
DTA114 EU
(Symbol: 16)
DTC114TU
(Symbol: 04)
UMZ2N
(Symbol: Z2)
2SJ144GR
(Symbol: VG)
2SJ144 Y
(Symbol: VY)
2SK1829
(Symbol: K1)
DTC114YU
(Symbol: 64)
DTC144EU
(Symbol: 26)
2SK3078A
(Symbol: UW)
DTA113ZU
(Symbol: 111)
HAT1023R
(Symbol: 1023)
2SC4215 O
(Symbol: QO)
2SC4226 R25
(Symbol: R25)
2SC4228 R44
(Symbol: R44)
2SA1586 GR
(Symbol: SG)
2SC3356
(Symbol: R22)
B
E
C
E
C
B
B
E
C
S
D
G
B
E
C
2SC4116GR
(Symbol: LG)
2SC4117GR
(Symbol: DG)
E
C
B
E
C
B
2SC4228 R45
(Symbol: R45)
E
C
B
2SC5108 Y
(Symbol: MC)
E
C
B
E1
B1
B2
C1
E2
C2
XP4601
(Symbol: 5C)
E1
B1
C2
C1
B2
E2
2SB798 DK
(Symbol: DK)
B
C
E
C
3SK320
(Symbol: U7)
G
G
S
D
2SB1132Q
(Symbol: BA)
B
C
E
B
E
C
B
E
C
B
E
C
B
E
C
B
E
C
S
S
S
G
D
D
D
D
E
C
B
E
C
B
S
D
G
B
E
C
G
S
D
S
G
S
D
1SV284
(Symbol: TL)
SB07-03C
(Symbol: J)
RB551V-30
(Symbol: D)
HVC376B
(Symbol: B9)
MA133
(Symbol: MP)
MA2S077
(Symbol: S)
MA2S111
(Symbol: A)
MA2S728
(Symbol: B)
1SV308
(Symbol: TX)