Icom IC-F4001 User manual

S-14617XZ-C1
Nov. 2009
UHF TRANSCEIVERS

This service manual describes the latest technical
information for the IC-F4001/IC-F4002/IC-F4003/IC-F4006/
IC-F4008 UHF TRANSCEIVERS at the time of publication.
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than the specified voltage.
This will ruin the transceiver.
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 (100 mW) to
the antenna connector. This could damage the transceiver’s
front-end.
To upgrade quality, any electrical or mechanical parts
and internal circuits are subject to change without notice
or obligation.
MODEL VERSION
CHANNEL
SPACING
(kHz)
FREQUENCY
RANGE
(MHz)
IC-F4001
USA-11
12.5/25.0
400–470
USA-12
USA-13
IC-F4002
EUR-21
12.5/20.0/25.0EUR-22
EUR-23
UK-01
12.5/25.0
UK-02
UK-03
IC-F4003
EXP-11
EXP-12
EXP-13
EXP-21
EXP-22
EXP-23
EXP-01
EXP-03
EXP-31
AUS-21
AUS-22
AUS-23
IC-F4006
RUS-21
RUS-22
RUS-23
IC-F4008 CHN-31
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit Icom part number
2. Component name
3. Equipment model name and unit name
4. Quantity required
<ORDER EXAMPLE>
1110003491 S.IC TA31136FNG IC-F4001 MAIN UNIT 5 pieces
8820001210 Screw 2438 screw IC-F4003 Top cover 10 pieces
Addresses are provided on the inside back cover for your
convenience.
ORDERING PARTS
1. Make sure that the 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 tuning 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 Standard Signal
Generator or a Sweep Generator.
7. ALWAYS connect a 50 dB to 60 dB attenuator between
the transceiver and a Deviation Meter or Spectrum
Analyzer when using such test equipment.
8. READ the instructions of the test equipment throughly
before connecting it to the transceiver.
REPAIR NOTES
INTRODUCTION CAUTION
(IC-F4001)
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, 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 INSTRUCTION
SECTION 4 CIRCUIT DESCRIPITON
4-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4-3 FREQUENCY SYNTHESIZER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-4 VOLTAGE BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-5 PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2 FREQUENCY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5-3 TRANSMIT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5-4 RECEIVE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
SECTION 6 PARTS LIST
SECTION 7 MECHANICAL PARTS
SECTION 8 BOARD LAYOUTS
SECTION 9 BLOCK DIAGRAM
SECTION 10 VOLTAGE DIAGRAM

1 - 1
SECTION 1
.
SPECIFICATIONS
MGENERAL
• Frequency range : 400–470 MHz
• Number of conventional channels : 16 channels
• Type of emission : [EUR] Wide: 16K0F3E (25.0 kHz)
Middle: 14K0F3E (20.0 kHz)
Narrow: 8K50F3E (12.5 kHz)
Except [EUR] Wide: 16K0F3E (25.0 kHz)
Narrow: 11K0F3E (12.5 kHz)
• Antenna impedance : 50 Ω(Nominal)
• Operating temperature range : –30˚C to +60˚C; –22˚F to +140˚F Except [EUR], [UK]
–25˚C to +55˚C [EUR], [UK]
• Power supply voltage : Specified Icom's battery packs only (7.2 V DC; negative ground)
• Current drain (Approx.) : Receiving 70 mA (stand-by)
330 mA (max. audio)
Transmitting 1.3 A (at 4.0 W)
• Dimensions
(Projections not included)
:With BP-264
58.6 (W)×111.0 (H)×31.0 (D) mm; 2 5/16 (W)×4 3⁄8(H)×1 7⁄32 (D) in.
With BP-265 58.6 (W)×111.0 (H)×35.5 (D) mm; 2 5/16 (W)×4 3⁄8(H)×1 13⁄32 (D) in.
• Weight : With BP-264 Approx. 330 g; 11 21/32 oz.
With BP-265 Approx. 270 g; 9 17/32 oz.
• Intermediate frequency : 1st 46.35 MHz
2nd 450 kHz
• Output impedance (Audio) : 8 Ω
• Input impedance (Audio) : 2.2 kΩ
MTRANSMITTER
• Output power : 4 W
• Modulation : Variable reactance frequency modulation
• Maximum frequency deviation : Narrow ±2.5 kHz
Middle ±4.0 kHz
Wide ±5.0 kHz
• Frequency stability : ±2.5 ppm
• Spurious emissions : 70 dB min. Except [EUR], [UK]
0.25 µW (≤1 GHz), 1.0 µW (>1 GHz) [EUR], [UK]
• Adjacent channel power : Narrow 60 dB min., 66 dB typ.
Middle 70 dB min., 73 dB typ.
Wide 70 dB min., 73 dB typ.
• Audio harmonic distortion : Wide, Middle 1.0% typ. at AF 1 kHz 40 % deviation
Narrow 1.5% typ. at AF 1 kHz 40 % Deviation
• FM hum and Noise
(Except [EUR], [UK])
(Without CCITT FILTER)
: Narrow 34 dB min., 40 dB typ.
Wide 40 dB min., 46 dB typ.
• Residual modulation ([EUR], [UK])
(With CCITT FILTER)
: Narrow 40 dB min.
Middle 43 dB min.
Wide 45 dB min.
• Limitting charact of modulator : 60–100% of max. deviation

1 - 2
MRECEIVER
• Sensitivity : 0.25 µV typ. at 12 dB SINAD Except [EUR], [UK]
–4 dBµV (EMF) typ. at 20 dB SINAD [EUR], [UK]
• Squelch sensitivity (at threshold) : 0.25 µV typ. Except [EUR], [UK]
–4 dBµV (EMF) typ. [EUR], [UK]
• Intermodulation : 70 dB min. 74 dB typ. Except [EUR], [UK]
65 dB min. [EUR], [UK]
• Spurious response : 70 dB min.
• Audio output power : 0.8 W typ. at 5% distortion with 12 Ω(Int. speaker)
0.4 W typ. at 5% distortion with 8 Ω(Ext. speaker)
• Hum and noise (Except [EUR], [UK])
(Without CCITT Filter)
: Narrow 34 dB min. 47 dB typ.
Wide 40 dB min. 52 dB typ.
• Hum and noise ([EUR], [UK])
(With CCITT Filter)
: Narrow 40 dB min.
Middle 43 dB min.
Wide 45 dB min.
• Adjacent channel selectivity : Narrow 60 dB min. 65 dB typ.
Middle 70 dB min. 73 dB typ.
Wide 70 dB min. 73 dB typ.
Specifications are measured in accordance with TIA/EIA-603B or EN 300 086
All stated specifications are subject to change without notice or obligation.

2 - 1
SECTION 2
.
INSIDE VIEWS
LED CTRL
(Q82,Q83)
VCO
• MAIN-A UNIT
(TOP VIEW)
CPU5 LINE REGULATOR
(IC54)
+5V LINE REGULATOR
(Q76)
PLL IC
(IC2)
MIC/AF LINE SW
(IC56)
APC AMP
(IC1)
TCXO
(X2)
TONE FILTER SW
(Q52)
TONE LPF
(IC59)
HPF
(IC58)
MIC GAIN CONTROLLER
(IC62)
2ND IF BPF
(FI2)
2ND IF BPF ( For narrow mode only )
(FI3)
LPF
(Q51)
BEEP SW
(IC61)
+5V LINE REGULATOR
(Q75)

2 - 2
CLONE BUFFER
(Q81, D51)
TUNED BPF
(D24, D26)
• MAIN-A UNIT
(BOTTOM VIEW)
DRIVE AMP
(Q2)
POWER AMP
(Q1)
PRE-DRIVE AMP
(Q3)
PRE-AMP
(Q4)
RF AMP
(Q22)
RESET IC
(IC53)
EEPROM
(IC52)
AF AMP
(IC55)
IF DEMODULATOR IC
(IC3)
XTAL BPF
(FI1)
AGC CTRL
(Q21)
S5 LINE REGULATOR
(Q71)
RIPPLE FILTER
(Q15)
R5 LINE REGULATOR
(Q72)
1ST IF MIXER
(Q23)
POWER CTRL
(Q63)
CPU
(IC51)
D/A CONVERTER
(IC57)
BUFFER
(IC60)
BUFFER
(Q9)
+5V LINE REGULATOR
(Q74)

3 - 1
SECTION 3
.
DISASSEMBLY INSTRUCTION
BE CAREFUL to not pull out the speaker wire when
separating the CHASSIS and the FRONT PANEL.
For easy separation of the CHASSIS
Use a suction lifter to lift the bottom of the CHASSIS up.
1. REMOVING THE CHASSIS
1) Remove the ANT connector nut and 2 knobs.
2. REMOVING THE MAIN UNIT
1) Remove the 9 screws and the side plate from the
MAIN UNIT.
2) Unsolder the 2 points shown, and then remove the
MAIN UNIT.
2) Remove 2 screws from the bottom of the CHASSIS.
3) Lift the bottom of the CHASSIS up in the direction
of the arrow.
4)
CAREFULLY lift the chassis out of the FRONT PANEL
and turn it over in order to unplug the speaker wire.
(Continued to the right above)
5) Remove the seals and nuts from the CHASSIS.
ANT CONNECTOR NUT
KNOBS
FRONT PANEL
FRONT PANEL
CHASSIS
SCREWS×2
SPEAKER
WIRE
CHASSIS
FRONT PANEL
TOP SEAL
NUTS×2 SIDE SEAL
CHASSIS
UNSOLDER
Solder
remover
CHASSIS
SCREWS×9
MAIN UNIT
MAIN UNIT
SIDE PLATE
Suction lifter
Suction lifter
• Part name : EA950R-2
• Manufacture : ESCO CO.LTD

4 - 1
• RF CIRCUITS
• 1ST IF CIRCUITS
• 2ND IF CIRCUITS
SECTION 4
.
CIRCUIT DESCRIPTION
LPF
ANT
SW
D3,D22
RF
AMP
Q22
BPF
D28 D24,D26
BPF
T2 T1
From the TX circuits
To the 1st IF circuits
ANT
LO
SW
D5,D6
Q23
BPF
XTAL
FI1
IF
AMP
Q24
BUFF
Q8
BUFF
Q10
LPF
RX VCO
To the TX circuits
From the RF circuits
To the 2nd IF&demodulator circuits
46.35MHz
1st IF mixer
PLL
IC
IC2
MB15A02
X3
Q26
BPF
X2
TCXO
W/N
SW Q27,
D33,D34
X1
Discriminator
BPF
CERAMIC
FI2
BPF
CERAMIC
FI3
W/N
SW
D31,D32
D/A
converter
IF IC
From the 1st IF
circuits
To the RX AF circuits
IC3:NJM2591
15.3MHz
45.9MHz
DISC
SQIN
IC57
R2A20178
450kHz
450kHz
NWC
NOIS
4-1 RECEIVER CIRCUITS
RF CIRCUITS
The RX signal from the antenna is passed through the LPF
and antenna SW, then filtered by the 2-staged tuned BPF
to eliminate unwanted out-of-band signal. The filtered RX
signal is amplified by the RF AMP, and filtered by another
2-staged tuned BPF to obtain a good image response, then
applied to the 1st IF circuits.
The tuned BPFs are tuned to the RX frequency by applying
adequate tuning voltages; “T1” and “T2” to the variable
capacitors.
1ST IF CIRCUITS
The RX signal from the RF circuits is applied to the 1st IF
mixer and mixed with the 1st LO signal from the RX VCO,
resulting in the 46.35 MHz 1st IF signal. The 1st IF signal is
filtered by the crystal filter, amplified by the 1st IF AMP, then
applied to the 2nd IF circuits.
2ND IF CIRCUITS AND DEMODULATOR
The signal from the 1st IF circuits is applied to the IF
demodulator IC which contains the 2nd IF mixer, 2nd IF
AMP, FM detector, etc. in its package.
The 1st IF signal is applied to the 2nd IF mixer and mixed
with the 2nd LO signal resulting in the 450 kHz 2nd IF
signal.
The 2nd LO signal is generated by tripling the 15.3 MHz
reference frequency signal oscillated by the reference
frequency oscillator (TCXO).
The converted 2nd IF signal is filtered by the crystal filter/
filters to eliminate unwanted signal, and amplified by the
2nd IF AMP, then demodulated by the detector circuit which
employs a discriminator as the phase shifter.
The demodulated AF signal is applied to the RX AF circuits.

4 - 2
• RX AF CIRCUITS
AF
AM P
IC55 TPA0211DGN J52
IC62
RX
MUTE
SP1
HPF
IC58
AF
AM P
IC12
TA7368F
HPF
IC58
J53
Int.speaker
Ext.speaker
1
2
LPF
IC58
LPF
IC59
the demodulator
circuits
IC56
AF line SW
CD4066
AFON
AFO
RMUT 1
D/A
converter
IC57
R2A20178
RX AF CIRCUITS
The demodulated AF signal from the IF demodulator
IC is passed through the LPF, HPF which attenuates
frequencies 300 Hz and below. The filtered AF signal is
passed through the AF line SW, HPF which additionally
attenuates frequencies 300 Hz and below, de-emphasis
circuit which provides –6 dB/oct of frequency response.
The de-emphasized AF signal is passed through the AF
SW, LPF which attenuates frequencies 3 kHz and above, is
adjusted in level by the D/A converter. The level-adjusted AF
signal is then applied to the AF power AMP via the AF line
SW.
The amplified AF signal is applied to the internal or external
speaker.
4-2 TRANSMITTER CIRCUITS
TX AF CIRCUITS
The audio signal from the internal or external microphone
(MIC signal) is passed through the MIC gain SW and applied
to the MIC AMP. The amplified MIC signal is passed through
the MIC mute SW, HPF which attenuates frequencies
300 Hz and below. The filtered MIC signal is passed through
the pre-emphasis circuit which provides +6 dB/oct of
frequency response, then they applied to the limiter AMP.
The amplitude-limited MIC signal is passed through the
MIC line SW, and applied to the splatter filter, which
attenuate harmonics in the MIC signal to prevent exceeding
permissible deviation.
The filtered MIC signal is applied to the D/A converter which
adjusts its level (=deviation). The level-adjusted MIC signal
is applied to the TX VCO as the modulation signal.
• TX AF CIRCUITS
AM
limit
P
IC58
MIC
MUTE
IC62
MIC
GAIN
SW
IC62
HPF
IC58
MC51
AM
MIC
P
IC60
LPF
IC58
Splatter
J51
Ext.MIC
Int.MIC
D/A
MOD
To the modulation circuits
IC56
MIC
line
SW
CD4066
IC57
MODULATION CIRCUIT
The modulation signal from the TX AF circuits is applied to
D15 of the TX VCO to frequency-modulate it. The frequency-
modulated signal from the TX VCO is buffer-amplified by
two buffers, and applied to the TX AMP circuits via the TX/
RX SW (D5).
• MODULATION CIRCUITS
LO
SW
D5,D6
Q14,D16
FREQUENCY
MODULATION
D15
BUFF
Q8
BUFF
Q10
TX VCO
F
rom the TX AF circuits
To the TX AMP circuits

4 - 3
• TX AMPLIFIERS AND APC CIRCUIT
• FREQUENCY SYNTHESIZER CIRCUITS
4-4 VOLTAGE BLOCK DIAGRAM
LPF
PWR
DET
D1,D2
MUTE
SW
Q6
ANT
SW
D3,D22
PWR
AM P
Q1
APC
AMP
IC1
DRIVE
AM P
Q2
DRIVE
PRE
Q3
PRE
AM P
Q4
LPF
T1
TMUT
ANT
From the
TX VCO
To the RX circuits
LPF
LO
SW
D5,D6
Q13,D12
Q14,D16
FILTER
LOOP
PLL
IC
SO,SCL,PLST
IC2
X3
Q26
Q23
To the TX AMPs
BPF
BUFF
Q8
BUFF
Q10
BUFF
Q9
X2
TCXO
LV
ADJ
D14
LV
ADJ
D11
BUFF
IC60
LPF
IF IC
RX VCO
TX VCO
IC3
REF
BAL
15.3MHz
45.9MHz
1st IF mixer
LV
LVA
T5 To the TX circuits
To the RX circuits
To both RX and TX circuits
To both RX and TX circuits
To the logical circuits
REG
Q73
REG
+5V
Q74-76
REG
S5
Q71
S5
CPU5
REG
IC54
REG
R5
Q72
S5C
VCC
R5C
+5V
T5C
S5V
R5VPWON
CPU5
T5V
TX AMPLIFIERS
The buffer amplified signal from the LO SW (D5) is amplified
by; the pre-AMP, pre-drive AMP, drive AMP, and power AMP
in sequence, to obtain TX power. The amplified TX signal
is passed through the antenna SW and the LPF, which
eliminates harmonics, and then fed to the antenna.
APC CIRCUITS
D1 and D2 rectify a portion of the TX signal to direct current,
and the APC AMP compares the voltage and the TX power
control reference voltage, “T1.” The resulting voltage controls
the gain of the power and drive AMPs to keep the TX power
constant.
4-3 FREQUENCY SYNTHESIZER CIRCUITS
The RX VCO is composed of Q13, D11 and D12. The VCO
output signal is buffer-amplified by two buffers and applied
to the 1st IF mixer, via the LO SW (D6) and the LPF.
The TX VCO is composed of Q14 and D14–D16. The VCO
output signal is buffer-amplified by two buffers and applied
to the 1st IF mixer, via the LO SW (D6) and the LPF.
A portion of oscillated signal from each VCO is fed back to
the PLL IC via the buffer and the LPF.
The applied VCO output signal is divided and phase-
compared with a 15.3 MHz reference frequency signal from
the TCXO, which is also divided. The resulting signal is
output from the PLL IC, and DC-converted by the loop filter,
and then applied to the VCO as the lock voltage.
When the oscillation frequency drifts, its phase changes
from that of the reference frequency, causing a lock voltage
change to compensate for the drift in the VCO oscillating
frequency.

4 - 4
4-5 PORT ALLOCATIONS
• CPU (IC51)
• D/A CONVERTER (IC57)
PIN
NO.
LINE
NAME DESCRIPTION I/O
1 CDEC Tone signal (CTCSS/DTCS)
decoding input. I
2 STONE Tone signal (5/2 TONE, DTMF,
BIIS) decoding/encoding . I/O
13 CSFT Clock frequency shift.
H=Clock frequency is shifted. O
14 NWC
RX mode (narrow/wide)
switching.
L=While receiving in the narrow
mode
O
15 EPTT External PTT input.
H=An external PTT is pushed. I
16 ATX
Automatic TX control for VOX
mode.
H=Microphone input is detected.
O
17 BEEP Beep sounds. (Square waves) O
18 AFON
AF power AMP control.
H=AF power AMP (IC55) is
activated.
O
19 SCK Common clock. O
20 SO Common serial data. O
22 KEY2 [UPPER] key input.
L=Pushed I
23 KEY1 [LOWER] key input.
L=Pushed I
24 PLST PLL strobe.
H=Load enable. I/O
25 DAST D/A converter strobe.
H=Load enable. I/O
26 ESDA EEPROM data. I/O
27 ESCL EEPROM clock. I/O
28 R5C
Power supply switching control.
H=Supplying current to the
receiver circuits ("R5"line).
O
29 T5C
Power supply switching control.
H=Supplying current to the
transmitter circuits ("T5"line).
O
30 S5C
Power supply switching control.
H=Supplying current to the RX/
TX common circuits ("S5"line).
O
31 PWON
Power supply switching control.
H=The transceiver's power is
ON.
O
32 IPTT Internal PTT input.
L=PTT pushed. I
33,
34,
36
CENC2,
CENC1,
CENC0
CTCSS/DTCS signal. O
37–
40
CBI0–
CBI3 [ROTARY SELECTOR] input. I
41 DUSE Frequency response switching.
H=DTCS encoding O
42 RLED Busy LED (Green) control.
L=LED lights. (Squelch open) O
43 TLED Busy LED (Red) control.
L=LED lights. (Transmit) O
47 MGC0 MIC gain control. O
48 MGC1 MIC gain control. O
49 CLI Cloning data. I
50 CLO O
PIN
NO.
LINE
NAME DESCRIPTION I/O
51 ADSW A/D conversion select.
H=RSSI input, L=BATV input O
53 NOIS Noise level detect.
H=Squelch close I
54 UNLK PLL unlock detect. I
55 RMUT2 RX AF mute switch control.
L=AF mute. O
56 RMUT1 RX AF mute switch control.
L=AF mute. O
57 MMUT MIC mute switch control.
L=MIC mute. O
58 TMUT Transmission mute.
L=TX inhibit. O
59 MDET External microphone connection
detect. I
60 LVIN Lock voltage input. I
61 TEMP Temperature sensing voltage. I
62 AFVI [VOLUME CONTROL] input. I
63 VOXV
Microphone input sensing voltage. I
64 AD5
Remaining battery voltage.
(or)
RSSI voltage.
(The input signal depends on the
status of pin 51.)
I
PIN
No.
LINE
NAME DESCRIPTION
23 T1
(TXPO)
BPF tuning voltage
TX power control
24 T2 BPF tuning voltage
7 REF Reference frequency adjust voltage.
8 LVA Additional lock voltage adjustment.
11 SQLC Squelch threshold setting.
12 TENC CTCSS deviation adjustment.
19 BAL DTCS balance.
20 VRAF Max. deviation/AF volume adjustment.

SECTION 5
.
ADJUSTMENT PROCEDURE
5 - 1
¤ JIG CABLE
EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE
Cloning software CS-F3000 CLONING SOFTWARE
(Revision 1.0 or later) JIG cable Modified OPC-478/U/UC (See the illusted below)
RF power meter
(50 Ω terminated)
Measuring range : 0.1–6 W
Frequency range : 100–600 MHz
SWR : Less than 1.2 : 1
Frequency counter
Frequency range : 0.1–600 MHz
Frequency accuracy : ±1 ppm or better
Input level : Less than 1 mW
Modulation
Analyzer
Frequency range : 30–600 MHz
Measuring range : 0 to ±10 kHz Standard signal
generator (SSG)
Frequency range : 0.1–600 MHz
Output level : –20 to 90 dBµ
(–127 to –17 dBm)
AC millivoltmeter Measuring range : 10 mV to 10 V
Oscilloscope Frequency range : DC–20 MHz
Measuring range : 0.01–20 V Attenuator Power attenuation : 30 dB Capacity : More than 6 W
Audio generator
(AG)
Frequency range : 300–3000 Hz
Output level : 1–500 mV External speaker Input impedance : 8 Ω Capacity : More than 1 W
¤ REQUIRED EQUIPMENTS
5-1 PREPARATION
3-conductor 2.5 (d) mm plug
(MIC)
(GND)
33 k
3-conductor 3.5(d) mm plug
(CLONE)
OPC-478/U/UC
(GND)
(SP)
[JIG cable1]
[JIG cable2]
+−
AC
MILLIVOLTMETER
(10 mV to 10 V)
AUDIO GENERATOR
(300–3000 Hz/1–500 mV)
+−
PTT
+
4.7 µF
EXT. SPEAKER
(1 W/8 Ω)
+
−
SETTING;
Frequency : 1 kHz
Level : 1−500mV
Waveform : Sine wave

5 - 2
¤ CONNECTION
FM
deviation meter
Speaker (8 Ω)
to the antenna connector
Attenuator
30 dB
RF power meter
0.1– 6 W/50 Ω
Frequency
counter
Standard signal generator
–20 to 90 dBµ
(–127 to –17 dBm)
NEVER transmit while
an SSG is connected to
the antenna connector.
To [SP]
To [MIC]
JIG cables
To [SP] connector
PC
to USB port
to USB port
to RS-232C port
OPC-478
(RS-232C type)
OPC-478U
(USB type)
OPC-478UC
(USB type)

¤ ADJUSTMENT CHANNELS
Before starting the adjustments, use the cloning software to create the same cloning file as shown below, then upload it
into the transceiver.
5 - 3
Select “Middle”
For [EUR] versions:
When adjusting “Deviation” in the middle band, change the
bandwidth to “Middle” as shown below.
CONVENIENT: The same cloning file is available.
Right-click below, and select "Save Embeded File to
Disk."

5 - 4
¤ ADJUSTMENT UTILITY
DEVIATION
Click to open the
“I/O Check window”
ADJ. CHANNEL
RX SENSITIVITY
MOD. BALANCE
CTCSS\DTCS
REF. FREQUENCY
SQUELCH
LOCK VOLTAGE
(Adjustment)
TX OUTPUT POWER
If the below window appears, the utility is password-protected.
Enter the password to open the "Adjust Utility" window.
Click or [Read <– TR] in the [Adjust] menu to open the "Adjust Utility" window as shown below.

5 - 5
ADJUSTMENT TRANSCEIVER’S
CONDITION OPERATION ADJUSTMENT ITEM VALUE
PLL LOCK
VOLTAGE
-Adjustment-
1
–
• Connect an RF power meter to the
antenna connector. ––
(RX) 2 • CH. : 1
• Receiving
• Select the item [RX LVA], then push
[ENTER]. [RX LVA] 1.0 V
(TX) 3 • CH. : 1
• Transmitting
• Select the item [TX LVA], then push
[ENTER]. [TX LVA] 1.0 V
PLL LOCK
VOLTAGE
-Verify-
(RX)
1 • CH. : 2
• Receiving
• Click the [Reload (F5)] button to check
on the "I/O Check window" as illustrated
below. [LVIN]
(On the "I/O
Check window")
3.0–4.0 V
(Verify)
(TX) 2 • CH. : 2
• Transmitting
2.7–3.9 V
(Verify)
REFERENCE
FREQUENCY
1 • CH. : 3
• Transmitting
• Loosely couple a frequency counter to the
antenna connector. [REF]
470.0000 MHz
(±300 Hz)
5-2 FREQUENCY ADJUSTMENTS
1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.
2) Set or modify the adjustment value as specified using [←]/[→] on the PC's keyboard, then push [ENTER].
• I/O Check window
(The values shown above are example only.
Each transceiver has own values.)
* * * Lock voltage

5 - 6
ADJUSTMENT TRANSCEIVER’S
CONDITION OPERATION ADJUSTMENT ITEM VALUE
TX OUTPUT
POWER
(Hi power)
1 • CH. : 4
• Transmitting
• Connect an RF power meter to the
antenna connector. [Power (Hi)] 4.0 W
(L2 power) 2• CH. : 5
• Transmitting [Power (L2)] 2.0 W
(L1 power) 3• CH. : 6
• Transmitting [Power (L1)] 1.0 W
MODULATION
BALANCE
1 • CH. : 7
• Transmitting
• Connect a modulation analyzer with an
oscilloscope to the antenna connector
through an attenuator.
[BAL]
Square
waveform
FM DEVIATION
(Narrow mode)
1 • CH. : 8
• Transmitting
• Connect a modulation analyzer to the
antenna connector through an attenuator. [MOD N C] ±2.05 to ±2.15 kHz
(Middle mode)* 2 • CH. : 9
• Transmitting [MOD M C] ±3.25 to ±3.35 kHz
(Wide mode) 3• CH. : 9
• Transmitting [MOD W C] ±4.05 to ±4.15 kHz
CTCSS/DTCS
DEVIATION
1 • CH. : 10
• Transmitting
• Connect a modulation analyzer to the
antenna connector through an attenuator. [CTCSS/DTCS]
±0.65 to ±0.75
kHz
*; [EUR] versions only
5-3 TRANSMIT ADJUSTMENTS
1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.
2) Set or modify the adjustment value as specified using [←]/[→] on the PC's keyboard, then push [ENTER].

5 - 7
ADJUSTMENT TRANSCEIVER’S
CONDITION OPERATION ADJUSTMENT ITEM VALUE
RX SENSITIVITY 1• CH. : 11
• Receiving
1) Connect an SSG to the antenna
connector and set it as;
Frequency : 435 MHz
Level*: 20 dBµ (–87 dBm)
Modulation : 1 kHz
Deviation : ±3 kHz
2) Put the cursor on the adjustment item,
then push [ENTER].
[BPF ALL]
(Automatic
adjustment)
SQUELCH 1 • CH. : 12
• Receiving
1) Connect an SSG to the antenna
connector and set it as;
Frequency : 400 MHz
Level*: –13 dBµ (–120 dBm)
Modulation : 1 kHz
Deviation : ±1.5 kHz
2) Once close the squelch by increasing
[SQL] value, then decrease the value to
open the squelch.
3) Push [ENTER] key to store the value.
[SQL]
(Automatic
adjustment)
*; The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.
5-4 RECEIVE ADJUSTMENTS
1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.
2) Set or modify the adjustment value as specified using [←]/[→] on the PC's keyboard, then push [ENTER].

6 - 1
SECTION 6
.
PARTS LIST
IC1 1110002751 S.IC TA75S01F(TE85R,F) T 32.5/8.8
IC2 1140005991 S.IC MB15A02PFV1-G-BND-ERE1 T 42.9/24.7
IC3 1110007320 S.IC NJM2591V-TE1-#ZZZB B 45.8/38.9
IC51 1140015230 S.IC R4F20102NFA (EMPTY) B 77.7/38
IC52 1130015240 S.IC R1EX24016ATA00A B 85/25.2
IC53 1110007620 S.IC NJU7704F3-42A-TE1-#ZZZB B 87.6/44.6
IC54 1180003600 S.REG NJM2871BF05-TE1-#ZZZB T 15.6/34.8
IC55 1110007610 S.IC TPA0211DGNR B 13.8/42.1
IC56 1130011770 S.IC CD4066BPWR T 80.1/18.8
IC57 1110007550 S.IC R2A20178NP B 72.5/24.5
IC58 1110005340 S.IC NJM12902V-TE1-#ZZZB T 80.1/12
IC59 1110006350 S.IC LM2902PWR T 80.1/25.9
IC60 1110005340 S.IC NJM12902V-TE1-#ZZZB B 65.1/7.5
IC61 1140013200 S.IC CD4053BPWR T 80.1/38.3
IC62 1130011770 S.IC CD4066BPWR T 66.7/8.1
Q1 1560001700 S.FET RD07MUS2B-T112 B 28.6/13.5
Q2 1560001241 S.FET RD01MUS1-T113 B 36.1/14.4
Q3 1530000371 S.TRA 2SC3356-T1B S (R25) B 41.3/12.9
Q4 1530003311 S.TRA 2SC5107-O(TE85R,F) B 46.2/13.4
Q6 1590004050 S.TRA LDTA144EET1G <SLVJ> T 33.3/5.9
Q8 1530003311 S.TRA 2SC5107-O(TE85R,F) T 55.6/18.6
Q9 1530003311 S.TRA 2SC5107-O(TE85R,F) B 58.1/19.4
Q10 1530003311 S.TRA 2SC5107-O(TE85R,F) T 61/19.1
Q11 1590004070 S.TRA LDTC144EET1G <SLVJ> B 50.8/25.2
Q12 1590004070 S.TRA LDTC144EET1G <SLVJ> B 63/23.6
Q13 1530002920 S.TRA 2SC4226-T1 R25 T 56.5/22.6
Q14 1530002920 S.TRA 2SC4226-T1 R25 T 62.2/22.3
Q15 1530002851 S.TRA 2SC4116-BL(TE85R,F) B 62.7/16.2
Q17 1560000541 S.FET 2SK880-Y(T5RICOM,F) B 52.6/29.5
Q19 1590004070 S.TRA LDTC144EET1G <SLVJ> B 63.5/33.6
Q21 1560000841 S.FET 2SK1829(TE85R,F) B 25.7/31.5
Q22 1580000731 S.FET 3SK293(TE85L,F) B 21.2/29
Q23 1580000731 S.FET 3SK293(TE85L,F) B 36.4/27.3
Q24 1530002601 S.TRA 2SC4215-O(TE85R,F) B 38.3/42.6
Q25 1590004070 S.TRA LDTC144EET1G <SLVJ> T 49.3/35.1
Q26 1530002851 S.TRA 2SC4116-BL(TE85R,F) T 39.6/30.1
Q27 1590004050 S.TRA LDTA144EET1G <SLVJ> B 56/36.4
Q51 1590001650 S.TRA XP4601(TX) T 65.5/42
Q52 1590004070 S.TRA LDTC144EET1G <SLVJ> T 75.4/31.4
Q58 1590003431 S.TRA UNR911HG0L B 54.9/7.1
Q59 1590004070 S.TRA LDTC144EET1G <SLVJ> B 49.1/7.3
Q63 1520000460 S.TRA 2SB1132 T100 R B 15.1/35.5
Q64 1590001190 S.TRA XP6501-(TX).AB B 19.3/36
Q71 1510001090 S.TRA KTA2015Y-RTK/P B 65.1/36.6
Q72 1510000771 S.TRA 2SA1586-GR(TE85L,F) B 65.7/30.3
Q73 1510001090 S.TRA KTA2015Y-RTK/P B 78.6/23.8
Q74 1520000460 S.TRA 2SB1132 T100 R B 5.3/34.4
Q75 1590001190 S.TRA XP6501-(TX).AB T 4.5/35.2
Q76 1590004070 S.TRA LDTC144EET1G <SLVJ> T 6.8/35.2
Q81 1590003271 S.TRA UNR9210G0L B 70.5/45.8
Q82 1590004050 S.TRA LDTA144EET1G <SLVJ> T 71.6/39.5
Q83 1590004050 S.TRA LDTA144EET1G <SLVJ> T 71.6/41.6
Q84 1590004070 S.TRA LDTC144EET1G <SLVJ> B 19.2/44.1
Q85 1590004070 S.TRA LDTC144EET1G <SLVJ> B 22.4/44.1
D1 1750001800 S.DIO RB886CS T2RA B 13.8/6.6
D2 1750001800 S.DIO RB886CS T2RA B 13.8/10.5
D3 1750001890 S.DIO HVD142AKRF-E B 15.7/14.8
D5 1750001890 S.DIO HVD142AKRF-E B 49.6/15.2
D6 1750001890 S.DIO HVD142AKRF-E B 49.6/16.6
D11 1750001550 S.VAR HVD376BKRF-E T 56.8/26.4
D12 1750001840 S.VAR HVD350BKRF-E T 54/28.7
D14 1750001550 S.VAR HVD376BKRF-E T 60.4/26.1
D15 1750001650 S.VAR 1SV309(TPH3,F) T 64.6/28.2
D16 1750001840 S.VAR HVD350BKRF-E T 62.5/28.2
D18 1750001810 S.DIO L1SS400T1G <SLVJ> T 46.3/32.6
D21 1750001810 S.DIO L1SS400T1G <SLVJ> B 28.1/33.3
D22 1750001890 S.DIO HVD142AKRF-E B 15.7/18.3
D24 1750001780 S.VAR HVB350BYPTL-E B 18.1/23.8
D26 1750001780 S.VAR HVB350BYPTL-E B 18.1/26.7
D28 1750001780 S.VAR HVB350BYPTL-E B 29.2/26.7
D31 1750001790 S.DIO 1SS390 TE61 B 54.1/39.8
D32 1750001790 S.DIO 1SS390 TE61 B 51.7/36.8
D33 1750001790 S.DIO 1SS390 TE61 B 56.7/39.8
D34 1750001790 S.DIO 1SS390 TE61 B 58.1/38.5
D35 1750001810 S.DIO L1SS400T1G <SLVJ> T 37.5/6.3
D51 1750001820 S.DIO LRB706F-40T1G <SLVJ> B 67.9/45.8
D52 1750001790 S.DIO 1SS390 TE61 B 87/33.7
D53 1750001810 S.DIO L1SS400T1G <SLVJ> B 69.1/3.1
D55 1750001810 S.DIO L1SS400T1G <SLVJ> B 21.9/33.8
FI1 2030000870 S.MON MFT46.3P3 46.350 MHz (FL-442) B 36.2/34.6
FI2 2020002460 CER LTM450GW <JJE>
FI3 2020002570 CER LTM450HW <JJE>
X1 6070000310 S.DIS JTBM450CX70 <JJE> T 47.6/40.9
X2 6050012050 S.XTA CR-794 TTS14VSB-A6 15.3 MHz T 41.9/15
X51 6050012730 S.XTA CR-864 (SMD-49/12.288 MHz)
<JJE> T 86.9/38.5
L1 6200012490 S.COI 0.30-0.9-6TR 13.6N <COMO> B 9.5/7.5
L2 6200012490 S.COI 0.30-0.9-6TR 13.6N <COMO> B 10.6/10.5
REF PARTS DESCRIPTION M. H/V
NO. NO. LOCATION
[MAIN-A UNIT]
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)
S.=Surface mount
REF PARTS DESCRIPTION M. H/V
NO. NO.
LOCATION
[MAIN-A UNIT]
L3 6200013010 S.COI 0.30-0.9-5TL 10.3N <COMO> B 12.7/13.4
L4 6200002851 S.COI NLV25T-R82J B 18.2/16.6
L5 6200012610 S.COI 0.40-0.9-2TL 2.8N <COMO> B 18.2/13.4
L6 6200012610 S.COI 0.40-0.9-2TL 2.8N <COMO> B 20.7/13.4
L7 6200012980 S.COI 0.40-1.4-5TR 18.3N <COMO> B 23.6/13.4
L8 6200013860 S.COI MLK1005S12NJT B 41/10.7
L9 6200013840 S.COI MLK1005S18NJT B 45.5/10.7
L11 6200010850 S.COI LQW18AN22NG00D
(LQW1608A22NG00) B 13.9/16.6
L13 6200007700 S.COI LQW2BHN22NJ03L B 15.1/22.4
L14 6200007700 S.COI LQW2BHN22NJ03L B 15.2/28.1
L15 6200007680 S.COI LQW2BHN12NJ03L B 25.8/27.6
L16 6200007680 S.COI LQW2BHN12NJ03L B 32.7/27.6
L18 6200013800 S.COI MLK1005S39NJT B 36.4/23.5
L19 6200013780 S.COI MLK1005S56NJT B 34.4/25.1
L20 6200004770 S.COI ELJNC R56J-F B 39.4/27.7
L23 6200012170 S.COI MLG1608SR18J-T T 39.4/34.6
L24 6200012170 S.COI MLG1608SR18J-T T 41.5/31.8
L31 6200013810 S.COI MLK1005S33NJT T 53.8/17.7
L32 6200013810 S.COI MLK1005S33NJT B 56.3/20.4
L33 6200013830 S.COI MLK1005S22NJT T 59.2/18.3
L35 6190002030 S.COI MLG1608S 1R0J-T B 59.1/26.6
L36 6200013580 S.COI 0.30-0.9-4TR 5PER <COMO> T 54.3/26.1
L37 6190002030 S.COI MLG1608S 1R0J-T T 56.5/28.7
L40 6200013630 S.COI 0.30-0.9-3TR 5.8N 5PER
<COMO> T 63.8/24.9
L41 6200011860 S.COI LQW18ANR47G00D T 58.9/27.4
L42 6190002030 S.COI MLG1608S 1R0J-T T 60.5/28.8
L47 6200013840 S.COI MLK1005S18NJT B 51.3/20.4
L48 6200013990 S.COI MLK1005S1N0ST B 32.7/13.1
R1 7030005070 S.RES ERJ2GEJ 683 X (68K) B 7.2/5.5
R2 7030009140 S.RES ERJ2GEJ 272 X (2.7K) B 12.5/8.9
R3 7030005120 S.RES ERJ2GEJ 102 X (1K) B 14.1/8
R4 7030005120 S.RES ERJ2GEJ 102 X (1K) B 14.1/8.9
R5 7030009140 S.RES ERJ2GEJ 272 X (2.7K) B 12.5/10.9
R6 7030004990 S.RES ERJ2GEJ 221 X (220) B 20.3/17.9
R11 7030009140 S.RES ERJ2GEJ 272 X (2.7K) T 29.9/5.9
R12 7030005050 S.RES ERJ2GEJ 103 X (10K) T 31.7/5.9
R13 7030005090 S.RES ERJ2GEJ 104 X (100K) T 32.6/11.3
R14 7030005310 S.RES ERJ2GEJ 124 X (120K) T 30.8/11.3
R15 7030005170 S.RES ERJ2GEJ 474 X (470K) T 34.8/5.9
R16 7030005530 S.RES ERJ2GEJ 100 X (10) T 35.7/9.6
R17 7030008280 S.RES ERJ2GEJ 271 X (270) T 34.8/7.6
R18 7030005120 S.RES ERJ2GEJ 102 X (1K) T 35.7/7.6
R21 7030005530 S.RES ERJ2GEJ 100 X (10) B 33.2/10.8
R22 7030005040 S.RES ERJ2GEJ 472 X (4.7K) B 34.1/9.1
R23 7030005060 S.RES ERJ2GEJ 333 X (33K) B 32.3/9.1
R26 7030004970 S.RES ERJ2GEJ 470 X (47) B 38.2/10.8
R27 7030005040 S.RES ERJ2GEJ 472 X (4.7K) B 38.2/9.1
R29 7030004970 S.RES ERJ2GEJ 470 X (47) B 41/9.8
R30 7030005220 S.RES ERJ2GEJ 223 X (22K) B 41.8/15.1
R31 7030004980 S.RES ERJ2GEJ 101 X (100) B 45.5/9.8
R32 7030005220 S.RES ERJ2GEJ 223 X (22K) B 45.7/15.2
R33 7030005050 S.RES ERJ2GEJ 103 X (10K) B 49.6/13.1
R34 7030004980 S.RES ERJ2GEJ 101 X (100) B 49.6/14
R35 7030005040 S.RES ERJ2GEJ 472 X (4.7K) B 51.8/16.6
R41 7030005530 S.RES ERJ2GEJ 100 X (10) T 57.4/17.7
R42 7030005070 S.RES ERJ2GEJ 683 X (68K) T 57.4/19.3
R43 7030004980 S.RES ERJ2GEJ 101 X (100) B 54.5/18.8
R44 7030005090 S.RES ERJ2GEJ 104 X (100K) B 59.9/18.9
R45 7030004980 S.RES ERJ2GEJ 101 X (100) T 63.2/17.9
R46 7030005090 S.RES ERJ2GEJ 104 X (100K) T 62.8/19.3
R51 7030005010 S.RES ERJ2GEJ 681 X (680) B 52.8/25.2
R52 7030008370 S.RES ERJ2GEJ 561 X (560) B 61.5/22.3
R53 7030006020 S.RES RR0510P-682-D (6.8K) T 58.3/23.8
R54 7030006020 S.RES RR0510P-682-D (6.8K) T 58.1/25.4
R55 7030006020 S.RES RR0510P-682-D (6.8K) T 59.5/23.8
R56 7030006020 S.RES RR0510P-682-D (6.8K) T 60.3/25.1
R57 7030009320 S.RES ERJ2GEJ 4R7 X (4.7) T 61.9/24.2
R63 7030005220 S.RES ERJ2GEJ 223 X (22K) B 62.6/27.7
R64 7030005530 S.RES ERJ2GEJ 100 X (10) T 64.2/26.4
R65 7030005600 S.RES ERJ2GEJ 273 X (27K) B 64.4/26.1
R66 7030005100 S.RES ERJ2GEJ 154 X (150K) B 65.4/26.1
R67 7030007290 S.RES ERJ2GEJ 222 X (2.2K) B 60.9/16.4
R68 7030005170 S.RES ERJ2GEJ 474 X (470K) B 62.6/29.9
R70 7030005310 S.RES ERJ2GEJ 124 X (120K) B 62.6/31.8
R71 7030005050 S.RES ERJ2GEJ 103 X (10K) B 50.3/29.5
R72 7030004980 S.RES ERJ2GEJ 101 X (100) B 49.9/27.9
R73 7030005040 S.RES ERJ2GEJ 472 X (4.7K) B 55.6/30.5
R76 7030005120 S.RES ERJ2GEJ 102 X (1K) T 49.1/25.5
R77 7030008410 S.RES ERJ2GEJ 392 X (3.9K) T 46.7/25.5
R78 7030005120 S.RES ERJ2GEJ 102 X (1K) T 46.7/24.3
R80 7410001130 S.ARR EXB28V102JX T 44.4/29.9
R81 7030005100 S.RES ERJ2GEJ 154 X (150K) B 62/35.3
R82 7030005050 S.RES ERJ2GEJ 103 X (10K) T 40.1/19.4
R83 7030005580 S.RES ERJ2GEJ 560 X (56) T 46.7/20.9
R87 7030005090 S.RES ERJ2GEJ 104 X (100K) T 63.5/27.7
R88 7510001730 S.THE ERTJOEP 473J T 56.6/13.3
R89 7030010080 S.RES ERJ2RHD 104 X (100K) T 58.3/13.3
R101 7030005110 S.RES ERJ2GEJ 224 X (220K) B 28.1/32.1
R102 7030005170 S.RES ERJ2GEJ 474 X (470K) B 25.8/33.3
R103 7030008400 S.RES ERJ2GEJ 182 X (1.8K) B 28.1/30.9
R104 7030005050 S.RES ERJ2GEJ 103 X (10K) B 18.1/21.8
R105 7030005050 S.RES ERJ2GEJ 103 X (10K) B 20.3/27.2
R106 7030005240 S.RES ERJ2GEJ 473 X (47K) B 18.3/29
R107 7030005050 S.RES ERJ2GEJ 103 X (10K) B 20.2/31