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A-80 VHF SERVICE MANUAL
ABELL Industries Co., Ltd
A-80 VHF SERVICE MANUAL
V1.0
Contents
GENERAL……………………………………………………………………………1
REALIGNMENT……………………………………………………………………..2
DISASSEMBLY FOR REPAIR……………………………………………………..6
CIRCUIT DESCRIPTION……………………………………………………………8
PARTS LIST…………………………………………………………………………12
EXPLODED VIEW…………………………………………………………………..21
PACKING…………………………………………………………………………….26
ADJUSTMENT………………………………………………………………………27
PC BOARD VIEWS…………………………………………………………………32
SCHEMATIC DIAGRAM……………………………………………………………36
SPECIFICATIONS …………………………………………………………………. 41
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A-80 VHF SERVICE MANUAL
GENERAL
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced technicians familiar with similar types of
commercial grade communications equipment. It contains all required service information
for the equipment and is current as of the publication data. Changes which may occur after
publication are covered by either Service Bulletins or Manual Revisions. These are issued
as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment information, the full part identification
number should be included. This applies to all parts: components, kit s, or chassis. If the part
number is not known, include the chassis or kit number of which it is a part, and a sufficient
description of the required component for proper identification.
PERSONAL SAFETY
The following precautions are recommended for personal safety：
DO NOT transmit until all RF connectors are verified secure and any open connectors are
properly terminated.
SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an
explosive atmosphere.
This equipment should be serviced by a qualified technician only.
SERVICE
This radio is designed for easy servicing. Refer to the schematic diagrams, printed
circuit board views, and alignment procedures contained within.
Destination Number of CH RF power output
AH 16 4W
AL 16 4W
A37 16 4W
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A-80 VHF SERVICE MANUAL
REALIGNMENT
1 Mode
User Mode PC Mode Manufacture Mode
MODE FUNCTION
User Mode Use this mode for normal operation
Use this mode, to make various
PC Mode
Manufacture
Mode
settings by means of the FPU
through the RS-232C port.
Use this mode, to realign the various
settings through the RS-232C port
during manufacture work
2 How to enter each mode
MODE PROCEDURE
User Mode Power ON
PC Mode
Connect to the IBM PC compatible
machine and controlled by the FPU
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3 Setting acquainted
A-80 VHF SERVICE MANUAL
① PTT(Push-To-Talk)switch
Press this switch, then speak into the microphone to call a station. Release the switch to
receive.
② Monitor Key
Press and hold to monitor how busy the current channel is and to monitor signals being
received that don’t contain the matched QT/DQT code.
③ Channel announcer
Press this switch to get current channel information.
④ Channel selector
Rotate to select channels 1-16.
⑤ LED indicator
Lights red while transmitting, green while receiving a signal. Flashes red when the
battery voltage is low while transmitting.
⑥ Power switch/Volume control
Turn clockwise to switch the transceiver ON. Turn counterclockwise until a click sound,
to switch the transceiver OFF. Rotate to adjust the volume level.
FUNCTION MODE
① High/Low power mode
Press PTT, and turn ON to switch between powers High/Low.
② Wire cloning
Connect sample radio A with radio B with a cloning cable provided by ABELL. Turn on
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A-80 VHF SERVICE MANUAL
radio A, and then turn on radio B with [Monitor] being activated till the LED lights green.
Press [PTT] of radio B to start cloning. The LED of radio A flashes red, and radio B
flashes green during cloning. Radio B stop flashing, and LED of radio A lights red when
wire cloning is completed. Restart the radio to return to USER MODE.
PC MODE
Preface
The transceiver is programmed by using a personal computer, programming interface
(provided by ABELL) and programming software. Fig. 1 shows how the devices work.
Connection procedure
1． Connect the A-80 to the personal computer with the interface cable (UNX-05).
2． When data is transmitting from the transceiver the red LED lights.
When data is receiving by the transceiver the green LED lights.
Notes:
·The data stored in the personal computer must match the Model Name when it is written
into the EEPROM. Run the software and connect the transceiver with the personal
computer, and then turn ON.
·DO NOT press the [PTT] key during data transmission or reception.
·UNX-05 description
(PC programming interface cable: Option)
The UNX-05 is required to interface the A-80 with the computer. It has a circuit in its
D-sub connector (9-pin) case that converts the RS-232C logic level to the TTL level. The
UNX-05 connects the side panel jacks of the A-80 to the computer’s RS-232C serial port.
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A-80 VHF SERVICE MANUAL
·Programming software description
By installing programming software of A-80, users are allowed to program the
transceiver with UNX-05.
·Programming with PC
If data is transferred to the transceiver from a personal computer with software provide
by ABELL, the destination data (basic radio information) for each set can be modified.
Normally, it is not necessary to modify the destination data because their values are
determined automatically when the frequency range (frequency type) is set.
The values should be modified only if necessary.
Data can be programmed into the EEPROM in RS-232C format via the SP MIC plug.
DISASSEMBLY FOR REPAIR
Separating the case assembly from the chassis
1．Remove the two knobs ① and round nut ②.
2．Remove the two screws③.
3．Expand the right and left sides of the bottom of the case assembly, lift the chassis, and
remove it form the case assembly④.
4． Taking care not to cut the speaker lead⑤, open the chassis and case assembly.
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A-80 VHF SERVICE MANUAL
Separating the chassis from the unit
1．Remove the eleven screws⑥.
2．Remove the solder from the antenna terminal using a soldering iron then lift the unit
off⑦.
3．Remove the two screws ⑧ and remove the antenna connector.
Note: When fixing the unit in the chassis, be sure to solder the antenna terminal.
⑦
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A-80 VHF SERVICE MANUAL
CIRCUIT DESCRIPTION
1. Frequency configuration
The receiver utilizes double conversion. The first IF is 45.05MHz and the second IF is
455 KHz. The first local oscillator signal is supplied from the PLL circuit.
The PLL circuit in the transmitter generates the necessary frequencies.
2. Receiver
The receiver is double conversion super heterodyne, designed to operate in the
frequency range of 136 to 150MHz, 146 to 174MHz.
1） Front-end RF amplifier
An incoming signal from the antenna is applied to an RF amplifier (Q300) after passing
through a transmit/receive switch circuit (D300 and D301 are off) and a band pass LC filter.
After the signal is amplified, the signal is filtered through a band pass filter to eliminate
unwanted signals before it is passed to the first mixer.
The voltages of these diodes are controlled by to track the CPU (IC1) center frequency of
the band pass filter.
2） First Mixer
The signal from the RF amplifier is heterodyned with the first local oscillator signal from
the PLL frequency synthesizer circuit at the first mixer (Q301) to create a 45.05MHz first
intermediate frequency (1
crystal filters (XF300 and 301) to further remove spurious signals.
st
IF) signal. The first If signal is then fed through two monolithic
3） IF amplifier
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A-80 VHF SERVICE MANUAL
The first IF signal is amplified by Q302, and then enters IC300 (FM processing IC). The
signal is heterodyned again with a second local oscillator signal within IC300 to create a
455 KHz second IF signal. The second IF signal is then fed through a 455 KHz ceramic
filter (CF300) to further eliminate unwanted signals before it is amplified and FM detected
in IC300.
4） AF amplifier
The recovered AF signal obtained from IC300 is amplified by IC500D, filtered by the
high-pass filter IC500A to eliminate signals under 300Hz. And de-emphasized by R518
and C510. The processed AF signal passes through an AF volume control and is amplified
to a sufficient level to drive a loud speaker by an AF power amplifier (IC2).
5） Squelch
Part of the AF signal from IC300 enters IC300 again, and the noise component is
amplified and rectified by a filter and an amplifier to produce a DC voltage corresponding
to the noise level.
The DC signal from the FM IC goes to the analog port of the microprocessor(IC1).IC1
determines whether to output sounds from the speaker by checking whether the input
voltage is higher or lower than the preset value.
To output sounds from the speaker, IC1 sends a high signal to the AFCO lines and turns
IC2 on through Q501, Q5, Q4, Q7 and Q6.
6） Receive signaling
QT/DQT
300Hz and higher audio frequencies of the output signal from IF IC are cut by a
low-pass filter (IC500 B/C). The resulting signal enters the microprocessor (IC1). IC1
determines whether the QT or DQT matches the preset value, and controls the MUTE and
AFCO and the speaker output sounds according to the squelch results.
3. PLL frequency synthesizer
The PLL circuit generates the first local oscillator signal for reception and the RF signal
for transmission.
1） PLL
The frequency step of the PLL circuit is 2.5 or 3.125 kHz. A 12.8 MHz reference
oscillator signal is divided at IC6 by a fixed counter to produce the 2.5 or 3.125 kHz
reference frequency. The voltage controlled oscillator (VCO) output signal is buffer
amplified by Q102, then divided in IC6 by a dual-module programmable counter. The
divided signal is compared in phase with the 2.5 or 3.125 kHz reference signal in the
phase comparator in IC6. The output signal from the phase comparator is filtered through
a low-pass filter and passed to the varactor diodes D102, D103 (RX), D100 and D101 (TX)
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A-80 VHF SERVICE MANUAL
to control the oscillator frequency.
2） VOC
The operating frequency is generated by Q104 in transmit mode and Q101 in receive
mode. The oscillator frequency is controlled by applying the VOC control voltage, obtained
form the phase comparator, to the varactor diodes (D102 and D103 in receive mode and
D100 and D101 in transmit mode). The RX pin is set low in receive mode causing Q105
turn on, and TX pin is set low in transmit mode causing Q106 turn on. The outputs from
Q104 and Q101 are amplified by Q102 and sent to the buffer amplifiers.
3） UNLOCKED DETECOR
If a pulse signal appears at the LD pin of IC6, an unlocked condition occurs, and the DC
voltage obtained form D105, R126 and C144 causes the voltage applied to the LOCK pin
of the microprocessor to go low. When the microprocessor detects this condition, the
transmitter is disabled and the error indicating alarm occurs, ignoring the push-to-talk
switch input signal.
4. Transmitter
1） Transmit audio
The modulation signal from the microphone is amplified by IC400 (1/2), passes through
a preemphasis circuit, and amplified by the other IC400 (1/2) to perform IDC operation.
The signal then passes through a low-pass filter (splatter filter)(Q402 and Q403) and cuts
3kHz and higher frequencies. The resulting signal goes to the VCO through the VCO
modulation terminal for direct FM modulation.
2） QT/DQT encoder
A necessary signal for QT/DQT encoding is generated by IC1 and FM-modulated to the
PLL reference signal. Since the reference OSC does not modulate the loop characteristic
frequency or higher, modulation is performed at the VCO side by adjusting the balance.
3） VCO and RF amplifier
The transmit signal obtained from the VCO buffer amplifier Q103, is amplified by Q202.
This amplified signal is passed to the power amplifier , Q201 and Q200, which consists of a
2 stage FET amplifier and is capable of producing up to 4W of RF power.
4） ANT switch and LPF
The RF amplifier output signal is passed through a low-pass filter network and a
transmit/receive switching circuit before it is passed to the antenna terminal. The
transmit/receive switching circuit is comprised of D200, D300 and D301. D300 and D301
turned on (conductive) in transmit mode and off (isolated) in receive mode.
5）APC
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A-80 VHF SERVICE MANUAL
The automatic power control (APC) circuit stabilizes the transmitter output power at a
predetermined level by sensing the drain current of the final amplifier Field effect
Transistor (FET). The voltage comparator, IC001 (2/2), compares the voltage obtained
from the above drain current with a reference voltage which is set using the
microprocessor. An APC voltage proportional to the dif ference between the sensed voltage
and the reference voltage appears at the output of IC001 (1/2). This output voltage
controls the gate of the FET power amplifier, which keeps the transmitter output power
constant, The transmitter output power can be varied by the microprocessor which in turn
changes the reference voltage and hence, the output power.
6）Terminal protection circuit
When the thermistor (TH200) reaches about 80°C, the protection circuit turns on Q005
to protect transmitting final amplifier (Q200) from the over heating.
5．Power supply
A 5V reference power supply [5V] for the control circuit is derived from an internal
battery. This reference is used to provide a 5V supply in transmit mode [TXC], a 5V supply
in receive mode [RXC], and a 5V supply common in both modes [PLC] based on the
control signal sent from the microprocessor.
6．Control system
The IC1 CPU operates at 18.0178 MHz. This oscillator has a circuit that shifts the
frequency according to the EEPROM data.
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A-80 VHF SERVICE MANUAL
PARTS LIST
A-80 VHF AH:136-174MHz（A）BOM
Ref. No. Specification Package Description Quantity Part No.
Chip Resistor
1 0R 0603 ±5% 5 R24 R26 R27 R28 L401
2 0.39R 1206 ±5% 3 R017 R018 R019
3 10R 0603 ±5% 1 R1
4 100R 0603 ±5% 1 R406
5 330R 0603 ±5% 3 R5 R6 R16
6 390R 0603 ±5% 1 R020
7 470R 0603 ±5% 1 R401
8 680R 0603 ±5% 2 R014 R015
9 820R 0603 ±5% 2 R405 R425
10 1K 0603 ±5% 11
11 1.5K 0603 ±5% 1 R409
12 1.8K 0603 ±5% 1 R400
R7 R8 R12 R17 R22 R30
R32 R34 R42 R48 R423
13 2.2K 0603 ±5% 1 R53
14 2.4K 0603 ±5% 1 R412
15 3.3K 0603 ±5% 3 R413 R422 R021
16 4.7K 0603 ±5% 8
17 5.6K 0603 ±5% 1 R004
18 6.8K 0603 ±5% 1 R411
19 8.2K 0603 ±5% 1 R134
20 10K 0603 ±5% 7
21 12K 0603 ±5% 2 R135 VR100
22 15K 0603 ±5% 3 R136 R407 R408
23 18K 0603 ±5% 1 R403
24 20K 0603 ±5% 3 R29 R131 R132
25 33K 0603 ±5% 4 R414 R415 R418 R419
26 47K 0603 ±5% 4 R001 R006 R40 R57
27 51K 0603 ±5% 1 R410
28 56K 0603 ±5% 1 R139
29 68K 0603 ±5% 2 R10 R55
30 100K 0603 ±5% 9
R11 R13 R14 R15 R016 R39
R54 R60
R007 R33 R35 R52 R59
R417 R421
R002 R31 R41 R43 R44 R49
R50 R51 R402
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A-80 VHF SERVICE MANUAL
31 100K 0603 ±1% 1 R38
32 150K 0603 ±1% 7
33 180K 0603 ±5% 1 R003
34 270K 0603 ±1% 1 R56
35 750K 0603 ±5% 1 R404
36 1M 0603 ±5% 2 R005 R9
37 1.8M 0603 ±5% 2 R416 R420
38 NC 0603 3 R61 R133 R424
Resistor Network
39 1K×4 4×0603 YC164-JR-071K 3 CP1 CP2 CP4
40 100K×4 4×0603 YC164-JR-07100K 1 CP3
Adjustable Resistor
41 68K φ3 EVM3ESX50BS4 1 VR101
42 22K φ3 EVM3YSX50BE4 1 VR400
Chip Capacitance
43 5PF 0402 COG，±0.1PF，50V 1 C343
R008 R009 R010 R011
R012 R013 R37
44 10PF 0402 COG，±0.5PF，50V 2 C411 C344
45 22PF 0402 COG，±5%，50V 2 C7 C8
46 100PF 0402 COG，±5%，50V 3 C29 C30 C005
47 220PF 0402 COG，±5%，50V 3 C18 C23 C36
C001 C002 C004 C006
48 470PF 0402 X5R，±10%，16V 16
49 680PF 0402 X5R，±10%，16V 1 C415
50 820PF 0402 X5R，±10%，16V 1 C419
51 1000PF 0402 X5R，±10%，16V 3 C008 C009 C405
52 3300PF 0402 X5R，±10%，16V 2 C414 C418
53 3900PF 0603 X5R，±10%，16V 1 C9
54 0.01UF 0402 X5R，±10%，16V 8
55 0.01UF 0603 X5R，±10%，16V 0
56 0.022UF 0402 X5R，±10%，16V 2 C404 C406
57 0.027UF 0402 X5R，±10%，16V 2 C10 C403
58 0.033UF 0603 X5R，±10%，16V 1 C57
C010 C011 C34 C35 C40
C41 C43 C52 C53 C402
C409 C412
C1 C4 C47 C48 C50 C51
C416 C420
59 0.047UF 0402 X5R，±10%，16V 2 C413 C417
60 0.1UF 0402 X5R，±10%，16V 2 C003 C11
C12 C26 C27 C28 C32 C33
61 0.1UF 0603 X5R，±10%，16V 12
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C37 C49
C56 C58 C400 C407
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A-80 VHF SERVICE MANUAL
62 0.22UF 0603 X5R，±10%，16V 1 C148
63 1UF 0805 Y5V, +80,-20%,25V 2 C31 C122
64 1UF 1206 Y5V, +80,-20%,25V 1 C42
65 NC 0402 1 C345
Tan Capacitance
66 0.47UF A type ±20% 6.3V 1 C5
67 2.2UF A type ±20% 6.3V 2 C408 C421
68 4.7UF A type ±20% 6.3V 3 C55 C147 C410
69 6.8UF A type ±20% 10V 1 C012
70 10UF A type ±20% 6.3V 3 C6 C39 C401
Inductor
71
72 MLF1608DR22K 0603
73 LQH32MN1R0M23 1210 1UH\Power Inductor 1 L200
Diode
74 1SS372 SOT-323 DIODE 1 D401
BLM11A601S
BLM18AG601SN1D
0603 General Bead 600R 6 L1 L3 L4 L5 L400 L402
LF Multi layer
inductor
1 L2
75 DAN222 SOT-416 DIODE 1 D400
77 LED-02-0603QGC D0603 Green Light 1 LED1
78 LED-02-0603QRC D0603 Red Light 1 LED2
Triode
79 2SA1362 SOT-23 TRANSISTOR 1 Q11
80
80
81 2SC4919 SOT-523 TRANSISTOR 1 Q400
82 DTA114YE SOT-416 TRANSISTOR 2 Q10 Q13
83 DTC114EE SOT-416 TRANSISTOR 6 Q2 Q3 Q003 Q004 Q12 Q14
84 DTC114TE SOT-416 TRANSISTOR 1 Q005
85 FMMT717 SOT-23 TRANSISTOR 1 Q001
86 2SK1824 SOT-416 FET 2 Q002 Q401
IC
87 NJM2100V SSOP8 IC (AUDIO AMP) 1 IC400
88 AT24C08(SI27) SOP8 EEPROM 1 IC3
89 µPD78F0512GA(T)-8EU-A QFP48
90 WTV040-20S SOP20 Phonetics IC 1 IC5
2SC4617（BR）
2SC4617（BR）
SOT-416
SOT-416
TRANSISTOR
TRANSISTOR
CPU（model after
writing）
2
2
1 IC1
Q402 Q403
Q402 Q403
91 NJM2904V SSOP8 IC(APC) 1 IC001
92 XC6201P502PR SOT-89-3L
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IC（5V constant
voltage）
1 IC4
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A-80 VHF SERVICE MANUAL
Crystal
93 18.0178MHz 6.0×3.5×1.0 18.0178MHz 1 X1
Fuse
94 3A-32V 1206 R429003-3A-32V 1 FU1
Connector
FFC/FPC
95 L10 10PIN
Connector/(Underside
connecting and upside
pressing /0.5mm)
1 CN1
A-80 VHF AH:136-174MHz（B）BOM
Ref.
No.
Chip Resistor
1 0R 0402 ±5% 2 C303 L100
2 0R 0603 ±5% 12
3 0R 1206 ±5% 1 L312
4 10R 0603 ±5% 5 R2 R103 R142 R517 R218
5 18R 0603 ±5% 1 R210
6 33R 0603 ±5% 1 R326
7 47R 0603 ±5% 4 R100 R204 R206 R316
8 100R 0603 ±5% 5 R102 R114 R120 R328 R331
9 150R 0603 ±5% 5 R18 R112 R128 R311 R323
10 220R 0603 ±5% 1 R125
11 270R 0603 ±5% 4 R121 R130 R200 R201
12 330R 0603 ±5% 5 R108 R111 R209 R211 R212
13 470R 0603 ±5% 2 R314 R329
Specification Package Description Quantity Part No.
L111 R140 R141 R205 R300
R302 R312
R315 R318 R327 R502 R506
14 680R 0603 ±5% 2 R109 R123
15 1K 0603 ±5% 4 R105 R107 R127 R519
16 1K 0603 ±1% 1 R508
17 1.2K 0603 ±5% 1 R332
18 1.5K 0603 ±5% 1 R214
19 1.8K 0603 ±1% 4 R207 R338 R339 R500
20 2.2K 0603 ±5% 2 R20 R325
21 3.3K 0603 ±5% 6
22 3.9K 0603 ±5% 2 R213 R334
23 4.7K 0603 ±5% 2 R25 R137
24 5.6K 0603 ±5% 4 R509 R513 R516 R518
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R124 R203 R215 R324 R336
R337
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A-80 VHF SERVICE MANUAL
25 10K 0603 ±5% 3 R19 R104 R110
26 10K 0603 ±1% 1 R501
27 22K 0603 ±5% 1 R510
28 33K 0603 ±5% 1 R3
29 47K 0603 ±5% 7
30 56K 0603 ±5% 3 R23 R320 R322
31 68K 0603 ±5% 1 R308
32 91K 0603 ±5% 1 R514
33 100K 0603 ±5% 18
34 120K 0603 ±5% 5 R122 R143 R335 R505 R515
35 180K 0603 ±5% 1 R524
36 220K 0603 ±5% 1 R511
37 270K 0603 ±5% 1 R520
R4 R118 R126 R138 R202 R208
R521
R113 R115 R116 R303 R304
R305 R306 R307 R309 R313
R317 R319 R321 R340 R504
R507 R522 R523
38 390K 0603 ±5% 2 R333 R512
39 470K 0603 ±5% 2 R21 R503
40 680K 0603 ±5% 1 R330
41 NC 0603 ±5% 3 R310 R341 TH300
Resistor Network
42 1K×4 4×0603 YC164-JR-071K 1 CP100
43 NCP18WB473J03RB 0603
Chip Capacitance
44 0.5PF 0402 COG，±0.1PF，50V 2 C107 C129
45 0.75PF 0402 COG，±0.1PF，16V 1 C104
46 1PF 0402 COG，±0.1PF，16V 1 C304
47 1.5PF 0402 COG，±0.1PF，16V 1 C121
48 2PF 0402 COG，±0.1PF，16V 3 C306 C308 C328
49 3PF 0402 COG，±0.1PF，16V 1 C200
Thermo sensitive
Chip
Negative Temperature
Coefficient
Thermistor（NTC）
1 TH200
50 3.6PF 0402 COG，±0.1PF，16V 1 C120
51 5PF 0402 COG，±0.1PF，16V 1 C106
52 6PF 0402 COG，±0.1PF，16V 3 C123 C330 C336
53 7PF 0402 COG，±0.1PF，16V 1 C310
54 8PF 0402 COG，±0.1PF，16V 2 C214 C320
55 9PF 0402 COG，±0.1PF，16V 1 C203
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A-80 VHF SERVICE MANUAL
56 10PF 0402 COG，±0.5PF，16V 7
57 12PF 0402 COG，±5%，16V 2 C211 C229
58 15PF 0402 COG，±5%，16V 2 C110 C301
59 16PF 0402 COG，±5%，16V 1 C307
60 18PF 0402 COG，±5%，16V 4 C125 C130 C212 C309
61 20PF 0402 COG，±5%，16V 5
62 22PF 0402 COG，±5%，16V 2 C112 C204
63 27PF 0402 COG，±5%，16V 3 C208 C351 C352
64 30PF 0402 COG，±5%，16V 1 C332
65 33PF 0402 COG，±5%，16V 2 C109 C349
66 39PF 0402 COG，±5%，16V 2 C300 C356
67 56PF 0402 COG，±5%，16V 3 C118 C213 C517
68 82PF 0402 COG，±5%，16V 1 C361
69 100PF 0402 COG，±5%，16V 4 C16 C141 C142 C143
70 220PF 0402 COG，±5%，16V 2 C354 C355
71 470PF 0402 X5R，±10%，16V 27
72 470PF 0603 X5R，±10%，16V 1 C100
73 1000PF 0402 X5R，±10%，16V 30
74 4700PF 0402 X5R，±10%，16V 1 C360
75 5600PF 0402 X5R，±10%，16V 1 C514
76 0.01UF 0402 X5R，±10%，16V 15
77 0.012UF 0402 X5R，±10%，16V 1 C505
78 0.022UF 0402 X5R，±10%，16V 2 C508 C509
C101 C153 C154 C201 C205
C206 C222
C202 C305 C322 C329
C339
C38 C44 C103 C111 C128
C134 C209 C217 C223
C224 C227 C231 C233
C312 C313 C314 C315
C316 C317 C318 C324
C326 C327 C331 C337
C357 C502
C14 C21 C45 C102 C117
C127 C135 C136 C146
C149 C150 C156 C157
C207 C210 C220 C221
C225 C228 C230 C232
C311 C319 C323 C334
C335 C340 C348 C512
C516
C22 C25 C119 C131 C132
C133 C151 C216 C338
C341 C342 C346 C358
C506 C507
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A-80 VHF SERVICE MANUAL
79 0.033UF 0402 X5R，±10%，16V 1 C515
80 0.047UF 0402 X5R，±10%，16V 2 C510 C518
81 0.047UF 0603 X5R，±10%，16V 1 C504
82 0.1UF 0402 X5R，±10%，16V 2 C219 C350
C2 C3 C17 C19 C46 C137
C139 C144 C145 C215
83 0.1UF 0603 X5R，±10%，16V 20
84 0.22UF 0603 X5R，±10%，16V 1 C364
85 0.22UF 0402 X5R，±10%，16V 1 C124
86 0.47UF 0603 X5R，±10%，16V 1 C20
87 1UF 0603
88 1UF 0805
89 NC 0603 1 C155
90 NC 0402 12
Adjustable Capacitance
Y5V,＋80%－20%,25V
Y5V,＋80%－20%,25V
1 C503
2 C13 C218
C226 C234 C333 C347
C353 C362 C363 C500
C511 C513
C01 C02 C03 C04 C05 C06
C07 C08 C113 C115 C302
C321
91 10PF φ2 TZVY2Z100A001R00 3 TC100 TC101 TC301
Tan Capacitance
92 0.22UF A type ±20% 10V 1 C114
93 0.68UF P type ±20% 10V 1 C116
94 4.7UF A type ±20% 6.3V 3 C138 C152 C325
95 6.8UF A type ±20% 10V 1 C140
96 10UF A type ±20% 6.3V 3 C15 C359 C501
97 100UF C type ±20% 6.3V 1 C24
Inductor
98
99 BLM21PG300SN1 0805 Bead 3 L6 L208 L211
100 LQW31HN23NJ03L 1206 HF Wound Inductor 1 L109
101 LQW18AN27NJ00 0603 HF Wound Inductor 1 L212
102 LQW18AN33NJ00 0603 HF Wound Inductor 1 L304
103 LQW2BHN33NJ03L 0805 HF Wound Inductor 1 L209
104 LQW31HN33NJ03L 1206 HF Wound Inductor 1 L103
105 LQW18AN47NJ00 0603 HF Wound Inductor 2 L116 L301
106 LQW18AN56NJ00 0603 HF Wound Inductor 3 L302 L303 L307
BLM11A601S
BLM18AG601SN1D
0603 Bead 600R 7
L106 L110 L114 L117
L214 L306 L314
107 LQW18AN68NJ00 0603 HF Wound Inductor 1 L309
108 LQG18HN68NJ00 0603
- - 18 - -
HF Multi layer
Inductor
1 L213
Page 19
A-80 VHF SERVICE MANUAL
109
110
111 MLF1608A1R0K 0603
112 NLV25T-1R0J-PF 2520 HF Wound Inductor 1 L210
113 NLV25T-R56J-PF 2520 HF Wound Inductor 2 L310 L313
114
115 NLV25T-2R2J-PF 2520
116 MLF1608A3R3K 0603
117 LFLK21254R7K 0805
118 MLF1608E6R8K 0603
119 NC 0603 8
Air-core coil
120 0.6×φ1.6×3TR P type
121 0.4×φ1.6×4TR P type
122 0.4×φ1.8×4TR P type
123 0.4×φ1.6×5TR P type
124 0.4×φ1.6×7TR P type
Diode
125 NC 0603 1 D106
LQG11A82NJ
LQG18HN82NJ00
MLK1005SR10JT00
LQG15HNR10J02D
1008CS-751XJBC
/NLV25T-R75J-PF
0603
0402
2520 HF Wound Inductor 1 L308
HF Multi layer
inductor
HF Multi layer
inductor
LF Multi layer
Inductor
HF Wound Inductor
LF Multi layer
Inductor
LF Multi layer
Inductor
LF Multi layer
Inductor
AIR-CORE COIL with
Pin (E)
AIR-CORE COIL with
Pin (E)
AIR-CORE COIL with
Pin (E)
AIR-CORE COIL with
Pin (E)
AIR-CORE COIL with
Pin (E)
1 L105
2 L115 L311
2 L315 L316
1 L204
1 L104
1 L118
5
1 L206
1 L205
2 L201 L203
2 L202 L207
1 L300
L001 L101 L102 L107
L108
L01 L02 L03 L04 R01 R02
R03 R301
126 HSC277 SOD-523 DIODE 4 D201 D300 D301 D307
127 HVC350B SOD-523 Varactor 5
128 ISR154-400 SOD-106 DIODE 1 D2
129 ISV214 SOD-323-A Varactor 1 D104
130 ISV283 SOD-523 Varactor 4 D100 D101 D102 D103
131 MA2S077 SOD-523 DIODE 1 D200
132 MA2S111 SOD-523 DIODE 2 D105 D107
Triode
- - 19 - -
D302 D303 D304 D305
D306
Page 20
A-80 VHF SERVICE MANUAL
133 2SA1362 SOT-23 TRANSISTOR 2 Q4 Q9
134 2SC2714 SOT-23 TRANSISTOR 1 Q302
135 2SC4617 SOT-416 TRANSISTOR 2 Q107 Q500
136 2SC4988 SOT-89-3L TRANSISTOR 1 Q202
137 2SC5108 SOT-416 TRANSISTOR 3 Q100 Q102 Q103
138 2SK1875-V SOT-323 FET 2 Q101 Q104
139 2SK1824 SOT-416 FET 1 Q501
140 2SK3475 SOT-89-3L FET 1 Q201
141 2SK3476 2-5N1A FET 1 Q200
142 AO3400 SOT-23 FET 1 Q6
143 3SK318 SOT-343 FET 2 Q300 Q301
144 DTA114EE SOT-416 TRANSISTOR 1 Q304
145 DTA114YE SOT-416 TRANSISTOR 1 Q303
146 DTA143TE SOT-416 TRANSISTOR 2 Q105 Q106
147 DTC114EE SOT-416 TRANSISTOR 3 Q5 Q7 Q8
148 NC 1 Q01
IC
149 TA7368F SOP10 AUDIO POWER AMP 1 IC2
150 MB1511PFV SSOP20 PLL 1 IC6
151 TA31136FN TSOP16 IF SYSTEM 1 IC300
152 NJM2902-A SSOP14 AUDIO AMP 1 IC500
Crystal
153 12.8MHZ 3.2×5mm NT5032S 1 X100
Touch-key
154 TSHW-2VSL 7×2.5mm 2 S1 S2
A-80 VHF AH: 136-174MHz Weld Part
Ref.
No.
1 Crystal 44.595MHz
2
3 Ceramic Filter
4
5 Mic
6 PTT 180(g） 3×6mm 1 S3
7
Material Specification Package Description
UM-5
Crystal
Filter
Frequency
Discriminator
Microphone
-Jack
45.05MHz
LTM455FW
JTBM455C24
FOM9745P-G421
CZ034CP421-X15(GP)
ST-106(gilded)
UM-5
455 1 CF300
1 CD300
φ9.7
×4.5mm
Couple
Assemble
1 M1
1 J2
Quantit
y
1 X300
2 XF300 XF301
Part No.
- - 20 - -
Page 21
A-80 VHF SERVICE MANUAL
8
Earphone
-Jack
9
10
Speaker
Speaker
Connection
11 Encoder
12
13
Potentiometer
switch
Power source
anode
(PJ-327、ST-016-041、
PJ-3527)(gilded)
4R/1W (FCE) φ36mm F36M188A 1 SP1
One red, one black，Copper wire
with 7 cores
ED08714O-FE18C9.0-A16-10
0
R08710NS-FE15C7.0-A103-0
0A
1 J1
￠1.0×80
mm
PVC
2
1
1
Assembled
part
1
BAT1 (Remark：
Assembled by
Anode reed
<M01307-014>,A
node
bracket<P02307
-003>, Screw
PBHΦ1.7×
4.0<MPB017-023
>,Cathode and
Anode rubber
dot<L06307-003
>)
EXPLODED VIEW
- - 21 - -
Page 22
A-80 VHF SERVICE MANUAL
Ref.
No.
1
○
2
○
3
○
4
○
5
○
6
○
7
○
8
○
Coding Name Specification Quantity Remark
M19040-002 Screw Φ4.0×3.5×M2.5 2
T15307-017 雷霆战将 PS mark 1 Domestic (match)
T15307-020
P01307-020 Cover 1
T15307-018
T15307-019
P11307-003
L01307-007 PTT rubber key 1 RUBBER'50°
M19013-002 Nut Φ13.5×2.5×M9 1
P04307-006
“A-80”English
PS mark
“ABELL 欧标”
PS mark (Chinese)
“ABELL”PS mark
(English）
PTT plastic key
frame
Indicator light
guiding pole（lamp）
1 Oversea (match)
1 Domestic
1 Oversea
1 ABS
1 PC/transparency
Brass-colored
Molding on the cover
ABS+PC（Resin）
/(contain
Channel mark)
Brass color,
matching
with antenna seat
9
○
10
○
11
○
12
○
13
○
14
○
15
○
16
○
17
○
A01A47-001 Antenna Antenna 146-174mhz
P07307-006 Channel Knob(big) 1 ABS/white
P08307-006 Volume Knob(small) 1 ABS
L07307-002 Rubber mic cover 1 RUBBER'50°
S07307-003
L02307-004 Speaker rubber mat RUBBER 1
S02307-001 Speaker sponge mat φ16×1（unit：mm） 1
MKM025-013 screw φ2.5×5KMH 2
A02307-002 Antenna seat SMA-JFD-13(new) 1
Speaker dustproof
net
φ38×48 1
1
N-250#（imported from
USA）
Plating colorful,
antenna seat screw
- - 22 - -
Page 23
A-80 VHF SERVICE MANUAL
18
○
19
○
20
○
21
○
22
○
23
○
24
○
25
○
26
○
Coder
M19095-003 Nut Φ9.5×3.0×M6 2
L03307-003
M17307-006 Aluminum shell 1 ADC12
MPB017-023 Screw Φ1.7×4.0PB 1
M01307-014 Anode reed 1
L06307-003
Soft circuit
(T80FPC-2)
Potentiometer
switch
Rubber waterproof
loop
Cathode and
anode rubber dot
ED08714O-FE18C9.0-
A16-100
S2676B
R08710NS-FE15C7.0-
A103-00A
1 RUBBER'35°
2
1
Brass color, matching
with coder and
potentiometer
1
1
Plating colorful ,
matching on the anode
reed
27
○
28
○
29
○
30
○
31
○
32
○
33
○
34
○
P02307-003 Anode bracket 1 ABS
M01307-015 Cathode reed 1
Plating colorful,
MPB020-033 Screw Φ2.0×3.5PBH 12
MPM025-043 Screw Φ2.5×7PM 2
T12307-004
T14307-007
T14307-008
PCB board
（A80VHF）
Transceiver host
mark（frequency
mark）
Battery mark
(Chinese)
Battery mark
(English )
PSW 1.0 J06-A80/01
A80-07-18/1 VHF
1
1300mA 7.2v
31.6×23.6mm
1300mA 7.2v
31.6×23.6mm
1
1
1
and cathode use
Plating colorful ,
cover
And aluminum shell
“model mark”means
frequency range mark
Specification bases on
customers requirement
Battery bottom
P10307-004
shell
1 ABS
board
self-tapping bolt
- - 23 - -
Page 24
A-80 VHF SERVICE MANUAL
35
○
36
○
37
○
38
○
39
○
40
○
41
○
42
○
43
○
44
○
P09307-004 Battery surface
M12308-001
P12307-002 Belt 1 ABS
P16307-003 Belt seat 1 ABS
M18308-006 Belt spring clip 1
M18307-008 Belt spring ф0.8 line 1
M02307-004 Belt spindle Φ1.9×18.8(unit: mm) 1
M02307-003
M18307-011
P14307-006 Battery lock clip
Battery touch plate
(short)
Battery clip
spindle
Battery lock clip
spring
Φ1.8×20(unit: mm)
Line diameter Φ0.5mm
1 ABS
5.7×5.2mm
4
1
1
1
ABS
45
○
46
○
47
○
48
○
49
○
50
○
P26307-001 Battery burke plate
MKM025-02
2
M19040-002 Nut
Battery touch plate
Battery touch plate
transceiver host
TH307H（A47）
semi-manufacture-
M12308-002
M12307-004
T11308-000
S08307-001 Waterproof paster 1 material：PORON
F01307-021
S02307-003 Crystal sponge mat 7×4×1(mm) 2
S06307-005 Radiate silica gel 7×3.8×1.0 1 Match 2SK3476
Screw
（long）
（long）
code
goods
Φ4.0×3.5×M2.5
7.7×4.7mm(J type)
1
Φ2.5×5KM
7.7×4.7mm
2
1
2
2
1
1
ABS
Plating black, tag on the
battery press plate.
Brass color, set on the
battery bottom cover
On cathode
On anode
“transceiver host
code” means the radio
body No.
- - 24 - -
Page 25
A-80 VHF SERVICE MANUAL
Package Material
Coding Material Specification Quantity Remark
T13307-001
B06307-007
B10307-008
B8221260-AA
B09307-002 Pull rope
B12307-003
B11307-021 transceiver host
B01307-008 Manual
B02307-001
B04307-002
B04307-001
B03307-010 Package box
Fitting:
Package outside
remark
Intelligent
charger
（finished
product ）
Ni-MH battery
group（finished
product
Outside
transformer
Plastic belt
subassembly
(finished product)
Service card
(18 months)
Battery package
bag
Transceiver
package bag
earphone(small
ear mic)
Input :12VDC/600mA
output: 12VDC/500mA
7.2V/1300mA
Input ：220VAC
output：12VDC/600mA
TH307H(A47) 1
1
1
160×85mm
204×102mm
1
1
1
1
1
1
1
1
1
1
"防伪标识"（marked by the
frequency and the
country）
THC500B rapid charger
black
Color box/ inside package
box
Base on customers
requirements
- - 25 - -
Page 26
A-80 VHF SERVICE MANUAL
Packing V iew
15.PROTECTION BAG
(H25-0085-04)
14.PACKING FIXTURE
(H12-3037-02)
ANT.WHIP ANTENNA
(T90-0694-15):M
(T90-0684-05);M4
17.ITEM CARTON CASE
(H52-1522-02)
3. CAP
(B09-0351-03)
16.PROTECTION BAG
(H25-2012-04)
G. SCREW SET
(N99-0396-05)
20.SP/MIC HOLDER
(J21-4493-04)
21.BELT HOOK
(J29-0624-03)
Adjustment
- - 26 - -
Page 27
A-80 VHF SERVICE MANUAL
Adjustment
Required test Equipment
1．Stability power supply
1．The supply voltage can be changed between 5V and 18V, and the current is 3A or more.
2．The standard voltage is 7.5V
2．DC Ammeter
1．Class 1 ammeter (17ranges and other features).
2．The full scare can be set to either 300mA or 3A.
3．A cable of less internal loss must to be used.
3．Frequency counter (F. Counter)
1．Frequency of 1GHz or so can be measured。
2．The sensitive can be changed to 500MHz or blow, and measurements are highly stable and
accurate .(about 0.2ppm)。
4．Power Meter
1．Measurable frequency：Up to 500MHz
2．Impedance：50Ω, instability。
3．Measuring range：full scare of 10W or so。
4．A standard cable (5D2W 1m) must be used。
5．RF Voltmeter(RF V.M)
1．Frequency range：up to 500MHz or so.
6．Linear Detector
1．Frequency range：up to 500MHz or so.
2．Characteristics are flat, CN is 60dB or more.
7．Digital Voltmeter
1．Voltage range：FS=18V or so.
2．Input resistance: 1MΩ or more
8．Oscillograph
1．Measuring range：DC to 30MHZ。
2．Provide highly accurate measurements for5 to 25MHz.
9．AF Voltmeter (AF V.M)
1．Measuring range：50Hz to 1MHz
2．Maximum sensitivity：1mV or more.
- - 27 - -
Page 28
A-80 VHF SERVICE MANUAL
10．Spectrum Analyzer
1．Measuring range：DC to 1GHz or more.
11．Standard Signal Generator (SSG)
1．Maximum frequency：500MHz or more.
2．Output：－133dBm/0.05μV to 7dBm/501mV
3．Output resistance：50Ω
12．Tracking Generator
1．Center frequency：50KHz to 500MHz
2．Frequency Deviation：±35MHz
3．Output voltage：100mV or more
13．Dummy Load
1．8Ω，3W or more
14．Audio Generator (AG)
1．Frequency range：100Hz to 100KHz
2．Output：0.5mV to 1V
15．Distortion Meter
1．Frequency range：30Hz to 100KHz
2．Input level：50mVto10Vrms
ADJUSTMENT FREQUENCY LIST
Destination
Channel
Center 160.050 136.05 136.05
Low 146.050 143.05 155.05
High 173.950 149.95 173.95
Remark
·Connect the transceiver to the PC.
·Send the channel data to the transceiver, then backup the data.
·Program the adjustment frequencies which are on the list, into the transceiver.
Note：Remember to reload the backed up date after making the adjustment.
1．Jig (chassis) for adjustment
2．Use the jig as follow：
1．Insert the coaxial cable connector into the jig.
2．Place the unit on the jig and fix it with 11 screws.
3．Solder the antenna terminal to the terminal of unit.
TX f
(MHz)
AH AL A37
Rx f
(MHz)
TX f
(MHz)
Rx f
(MHz)
TX f
(MHz)
Rx f
(MHz)
- - 28 - -
Page 29
A-80 VHF SERVICE MANUAL
Note：Supply power from an external power supply
(Relay terminal ：+ Jig <chassis> ：-)
Use the IMG-07D programming software for adjustment the following item in the PC mode
Squelch Level, Transmit frequency, DQT balance, RF power, QT deviation, DQT deviation,
Battery level
Section common to the transmitter and receiver (VCO)
Item Condition
1. Setting 1)Power supply voltage
Battery terminal：7.5V
2.VCO
lock
voltage
1)：CH: TX high
2)：CH: RX high
3)：CH: TX low
4)：CH: RX low
Test Equipment Terminal Parts Method
Digital voltmeter
Measurement Adjustment
Specification/Remarks
Tp100
TC100 3.7V
TC101 3.7V
Check More then 1.0V
±0.2V
±0.2 V
Receiver section
Item Condition Measurement Adjustment Specification/
- - 29 - -
Page 30
A-80 VHF SERVICE MANUAL
1 ． Band
pass-filter
2 ． Audio
Lever
3．Sensitiv
ity
4. Squelch
Level ( PC
mode)
1) CH：RX center
2)Tra generator output -40dBm
Connect the spectrum analyzer
to TP2 terminal
1)CH：Rx center
SSG output：-80dBm(501μV)
MOD：1KHz
DEV：±3.0KHz(Wide)
±1.5KHz(Narrow)
1)CH：RX center
CH：RX LOW
CH：RX HIGH
SSG output：-116dBm(0.35μV)
MOD：1KHz
DEV：±3.0KHz(wide)
±1.5KHz(narrow)
1)CH：RX center
MONI：on
2)Level 9
SSG output：-117dBm
3)Level 3
SSG output ：-125dBm(0.126μ
V)
Test
equipment
Tra generator
Spectrum
Analyzer
SSG
Oscilloscope
AF.V.M
Distortion meter
Terminal Parts method Remark
ANT
L312
Antenna
Speaker
TC301 Adjust the frequency
so that it becomes the
spectrum waveform
shown in fig1.
CD300
Check
PC
key
Adjust to the
maximum AF lever
Level 9
Adjust to close the
squelch
Level 3
Adjust to close the
squelch
SINAD：12dBor
higher
The squelch
must be closed
The squelch
must be closed
Transmitter section
Item
1．Transmit
(PC mode
2. Power
(PC mode)
3.
Maximum
DEV
Condition
1)CH：TX center
PTT：On
1)CH: TX low
Battery terminal: 7.5V
PTT: ON
1)CH: TX center
AG:
1KHz/120mV
PTT: ON
Measurement Adjustment
Test equipment Terminal Parts Method
F. counter PC key Adjust to center
Power meter
Ammeter
Modulation
Analyzer or linear
detector
(LPF:15KHz)
Oscilloscope
Audio generator
Audio voltmeter
Antenna
Antenna
Speaker
frequency
Adjust to 4W
VR400 Adjust to
±4.2KHz(wide)
Wide check
(+、- peak whichever
is maximum)
Specification/
Remark
Within ±100Hz
±0.1W
±100Hz
±1.8KHz～
2.2KHz
- - 30 - -
Page 31
A-80 VHF SERVICE MANUAL
4.MIC
SENS
5.QT DEV
(PC
MODE)
6.DQT
DEV( PC
MODE)
7. Battery
level
(PC
MODE)
1)CH: TX center
AG:
1KHz/12mV
1)CH: TX high
QT:67.0Hz
1)DQT:023N TX center Modulation
1) Battery terminal
：5.8V
Modulation
Analyzer or linear
detector
(LPF:3kHz)
Oscilloscope
Audio generator
Audio voltmeter
Analyzer or linear
detector
(LPF:3kHz)
Oscilloscope
Digital voltmeter Battery PC key Adjust so that the LED
Antenna
PC key
PC key
Check
(+、- peak whichever
is maximum)
Adjust to ±0.75
KHz(wide)
Adjust to ±0.35
KHz(narrow)
Adjust to ±0.75
KHz(wide)
Adjust to ±0.35
KHz(narrow)
flashed
±2.2KHz～
3.6KHz(wide)
±1.1KHz～
1.8KHz(narrow)
±50Hz
±50Hz
±50Hz
±50Hz
The LED must
flash
BPF-Wave
- - 31 - -
Page 32
A-80 VHF SERVICE MANUAL
- - 32 - -
Page 33
A-80 VHF SERVICE MANUAL
- - 33 - -
Page 34
A-80 VHF SERVICE MANUAL
- - 34 - -
Page 35
A-80 VHF SERVICE MANUAL
- - 35 - -
Page 36
A-80 VHF SERVICE MANUAL
Schematic Diagram
A
+
C39
10U 6.3
5C
1 2 3 4 56
File: F :\PCB\A80 VHF.dd b Drawn By:
C40
470P
IC4
S-81350
OUT
GND
470P
C41
IN
1U
5C
Date: 18-Sep-2007 Sheet of
B
Number RevisionSize
BATOUT
C42
C43
470P
0.1U
BAT1
7.5V
L6
磁珠
C44
470P
FU1
3A
1000P
C45
BATIN
0.1U
C46
ISR 1 5 4 - 40 0
D2
R43
100K
C52
470P
R57
47K
R41
100K
Title
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
TP
DTC114EE
0.01U
AD KEY
S1
SW-PB
0.01U
S2
SW-PB
PTT
C53
470P
S3
SW-PB
DTC114EE
R24
0
R26
0
5C
R27
0
R28
0
10K
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
0.1U
C49
R52
C12
4.7K
4.7K
0.027U
0.1uF
Q8
TXC
Q14
1K
AF-OUT
APC
4.7K
C10
C11
TXCC
C25
DTC114EE
Q12
C1
PLC
DTA114 YE
RXD
234
CN10
N10
BATOUT
AF -IN
BATIN
5C
R15
0.033U
C57
R54
3900P
C9
R11
4.7K
68K
R13
R14 4.7K
CTC OUT
1K
R25
4.7K
0.1U
47K
Q9
2SA1362
PLCC
0.1U
R39
4.7K
47K
Q11
2SA1362
100K
R61
NC
4.7K
Q13
R53
2.2K
10U 6.3V
R48
MIC
C58
100NF
5
J2
470P
MIC
B
CN1
AT2408
A01A12A23GND
TEST
VCC
CP2
J1
C23
0.1U
SP1
100U 6.3
C28
12
P2725P2626P2527P24
BATOUT
BUSY
C34
470P
+
SCL
6
8
7
R31
100K
5C
10K
R33
R35
10K
RX
R30
1K
P23/AI429P22/AI330P21/AI131P20/AI0
28
R12 1K
TI
150K
R37
RXC
C15
10U
+
R18
150
C16
100P
BATOUT
C19
0.1U
1000P
C24
N9
N8
N1N2N3N4N5N6N7
C51
0.01U
C50
0.01U
C48
0.01U
C47
0.01U
CP3
100k*4
R10
PTT LED
MONI LED
R17
AF MUTE
PTT
TXD
RXD
C3
R4
5C
C33
R40
5C
5C
R44
R60
R401
470
+
C401
R400
1.8K
C38
M1
1k*4
TX
R7
1K
13
P31
14
P30
15
P17
16
P16
17
P15
18
P14/RXD
19
P13/TX D
20
P12
21
P11
22
P10
23
AVREF
24
AVSS
L3
磁珠
5C
CP1
1k*4
100P
C29
0.1U
C32
C31
1U
100P
C30
R38
100K
AD KEY
PLC
RXCC
Q10
DTA114YE
L4
磁珠
C35
470P
SPEAK
C18
220P
124
3
L5
磁珠
C36
220P
R22
1K
TXD
220P
C
PTT LED
LED-A
VSS
X1
X2
P123
P124
P40
P41
P12
AF-OUT
2SA1362
R20
470K
C20
DTC114EE
C22
LED2
330
100K
R49
100K
R50
100K
R51
C13
GND8GND
Q4
R21
56K
MONI LED
Q2
DTC114EE
Q3
DTC114EE
LED1
LED-A
330
R5
R6
BATOUT
5C
C4
0.01U
磁珠
10U 6.3
C6
48
47
46
45
44
43
R16
330
42
41
40
39
38
37
9
R23
RESET
0.1uF
TA7368F
NC1VCC2NC3VIN4PHASE
IC2
POUT
10
R2
10
C2
0.1U
4.7U 6.3
68K
BATOUT
Q6
3400
R3
33K
TXC
TXC
GND
5C
L1
L2
0.22U
0.47U 6.3
R1
10
C5
22P
R9
1M
X1
18.0178MHz
22P
LOW VOL
R42
1K
R29
20K
1k*4
D1
MA2S111
C27
VOICE RESET
C26
0.1U
5C
0.1U
C37
20
15
EQ-L-OUT
AUDIO-L
R-FREQ
EQ-L -IN
BUSY
VCC
P067P07
4
2
6
3
1
5
R56
270K
0.1U
C56
C55
D3
MA2S111
R55
D4
MA2S111
AF-IN
5C
4
IC3
SDA
5
STB
CLK
DATA
LOCK
1K
R34
R8
R32
1K
1K
P601P612P623P634P335P756P747P73/K38P72/K29P71/K110P70/K011P32
UPD78 F05 1 2GA(T)-8EU-A
VDD
REGC
IC1
FLMD0
RESET
P13_O
P0134P0035P14
36
32
33
PLCC
AFCC
TXCC
RXCC
W/N
1U
C14
1000P
5
PHASE
NF
6
7
C17
0.1U
R19
10K
2.2K
Q5
DTC11 4EE
0.47U
C21
AFCC
Q7
0.01U
D
BATIN
RXC
RXC
W/N
W/N
AF MUTE
10K
WTV040-20S
IC5
RX
RX
DATA
LOCK
LOCK
TI
AF-IN
AF-INTIMIC
R59
APC
PLC
APC
PLC
BATIN
CTC OUT
CLK
CLK
CTC OUT
DATA
MIC
5C
5C
54321
6
STB
TX
STB
TX
BUSY
BUSY
AF MUTE
H/L
H/L
C8
C7
CP4
VOICE BUSY
VOICE CLK
VOICE DATA
P0411P0312RESETB16GND17VDD18AMP-P19AMP-N
P0213P0114P00
VPP
P05
9
8
10
A
B
- - 36 - -
C
D
Page 37
A-80 VHF SERVICE MANUAL
A Title
CLK
DATA
STB
0.1UF
C144
1 2 3 4
100P
100P
100P
C02
NC
C08
NC
Date: 18-Sep-2007 Sheet of
File: F :\PCB \A80VHF.dd b Drawn By:
A4
Number RevisionSize
CP100
1k*4
LOCK
C143
C142
C141
Q01
NC
NC
NC
NC
11
12
13
14
15
16
17
18
19
20
C01
NC
R02
NC
NC
L02
C03
NC
C05
NC
C04
L03
NC
NC
C06
C07
NC
L04
NC
IF
RXC
L01
R03
CLOCK
NC
DATA
LE
FC
BISW
FOU T
P
NC
R
R01
NC
MA2S111
R126
47K
D105
FIN
NC
LD
GND
DO
VCC
VP
XOUT
NC
XIN
12.8MHz
VCGND
R138
47K
C155
NC
56K
VR101
56K
PLC
GND
B
PLC
C136
1000P
C137
0.1U
磁珠
R127
1K
10
9
10
8
7
6
5
C138
4.7U
4
3
2
0.1U
1
IC6
C153
10P
C154
10P
1000P
R139
RXC
RXC
C139
R141
0
L118
4.7UH
C146
X100
XOUT
0.1U
5C
4.7UF 6.3V
C147
+
R132
20K
220nF
R133
NC
VCO OUT
CTC OUT
TX
VCO OUT
CTC OUT
R140
0
L117
R142
+
C145
D106
NC
R128
150
PLC
R131
20K
C148
CTC OUT
VR1 00
12K
R134
8.2K
R135
12K
R136
15K
MOD
STB
RX
RX
STBTXTX
C140
6.8uF
0.22UF
C124
TC10 1
10P
C125
18P
R130
270
1000P
C149
1000P
C150
+
0.01U
C151
C152
4.7U
MA2 S1 1 1
D107
R137
4.7K
0.01U
LOCK
DATA
MOD
PLC
DATA
LOCK
MOD
PLC
C
R100
C113
NC
+
C114
0.22uF
330
R109
680R
+
330
C116
0.68uF
150
磁珠
C117
1000P
6.8UH
ISV 2 8 3
D102
ISV 2 8 3
6.8UH
L108
C121
1.5P
L109
23NH
2SK1875
C129
0.5P
RX
Q107
2SC4617
C133
PLC
CLK
IF
IF
CLK
1K
R108
R110
10K
TP10 0
TP
R111
R112
L106
1000P
L107
56P
6P
Q104
100
R143
120K
1000P
C157
D103
C118
C119
0.01U
C123
C122
1U
MOD
R120
C127
1000P
0.01U
C131
DTA143 TE
Q105
0.01U
Q106 DTA14 3TE
L114
磁珠
R123
680
470P
1000P
47
PLC
C100
470P
R107
C115
NC
L100
0R
2SC5108
Q100
R113
100K
C101
10P
C156
100
100K
磁珠
L111
0
C130
18P
L001
6.8UH
R122
120K
100N
C134
47NH
3.3K
R125
220
C135
1000P
ISV 2 8 3
PLC
R114
10P
R115
R116
100K
33NH
L110
0.75P
R118
47K
D104
ISV 2 14
5P
R121
270
C107
0.5P
C132
2SC5108
Q102
L115
C109
33P
L116
C110
15P
2SC5108
10K
Q103
C112
22P
VCO OUT
R124
D
C102
L101
6.8UH
D100
ISV 2 83
D101
L102
6.8UH
470P
C103
TC10 0
C120
3.6P
L103
C104
C128
470P
C106
Q101
2SK1875
L104
3.3UH
R102
100
PLC
R103
10
C111
470P
R104
R105
1K
L105
82N
321
4
A
B
- - 37 - -
C
D
Page 38
A-80 VHF SERVICE MANUAL
1SS372
AF
0.1U
+
100R
820R
2SC4919
RXC
TXC5C5C
RXC
TI
TXC
C
820
VR4 00
22K(φ3)
R424
NC
R423
1K
C421
2.2U
+
C420
0.01U
R422
3.3K
2SC4617
R421
10K
C419
820P
C418
3300P
R418
33K
C417
0.047U
R417
10K
C415
680P
C414
W/N
C412
470P
Q401
2SK1824
3.3K
1.5K
0.022U
C407
L401
0R
D401
C408
2.2U
R406
D400
DA222
R405
Q400
MOD
W/N
MIC
W/N
MOD
MIC
3300P
R414
33K
C413
0.047U
R413
R412
2.2K
R411
6.8K
10P
7
8
C409
470P
R409
VCC
C406
123
R404
750K
100K
1000P
470P
C404
0.022U
C405
18K
R403
C403
0.027U
R402
C402
C400
0.1U
L400
磁珠
MIC
D
R425
MOD
TXC
L402
磁珠
Q403
R420
1.8M
R419
33K
Q402
2SC4617
R416
1.8M
R415
33K
C416
0.01U
C411
R410
51K
C410
4.7U
+
5
6
IC4 0 0NJM210 0
GND
4
R407
15K
R408
15K
5C
321
4
R519
1K
1000P
C512
C514
R507
R506
0
10K D
R501
C502
470P
10U 6.3
C501
B
AF -IN
2SK1824
0.1U
C510
0.047U
5.6K
R516
5.6K
R514
91K
5.6K
RXC
4 11
22K
C505
12nF
NJM2902-A
R505
120K
R504
100K
470K
R502
0R
R500
1.8K D
RXC
Q501
C511
R518
C513
0.1U
2SC4617
Q500
R513
C509
22nF
C508
22nF
1
2
3
R511
220K
C507
0.01U
0.01U
R510
C506
R509
5.6K
C504
47nF
14
IC500D
13
12
R503
C500
0.1U
AF
RXC
R517
10R
R515
120K
NJM2902-A
IC5 0 0 A
R512
390K
AF MUTE
AF MUTE
AF-INAFTI
GND
AF -IN
AF MUTE
A
AF MUTE
1 2 3 4
TI
C518
0.047U
7
180K
R524
C517
56P
0.033U
8
NJM2902-A
10
Date: 18- Sep-2 007 S heet of
File: F:\PCB\A80VHF.ddb Drawn By:
Title
A4
Numbe r Revi sio nSize
NJM2902-A
IC5 0 0 B
5
6
1000P
C516
R523
100K
R522
100K
C515
R521
47K
IC500C
5600P
R520
270K
9
100K
C503
1U
1K D
R508
A
B
- - 38 - -
C
D
Page 39
A-80 VHF SERVICE MANUAL
27NH
DTC114EE
Q004
C219
VCO OUT
0.1U
470P
6.8U 10V
150K
TXC
C
L212
C226
C010
C217
+
C012
1U
R008
R007
BATIN
APC
APC
BATIN
TXC
R207
1.8K
R208
47K
C225
1000P
磁珠
L211
470P
470P
C224
R203
3.3K
R202
47K
C220
1000P
L208
磁珠
470P
C215
0.1U
C216
0.01U
C218
TXC
R201
270
R200
270
C209
470P
RF IN
RF IN
D
2SK3475
R206
47
C223
47
22P
20P
3P
Q201
L210
1UH
R205
0R
C222
10P
C221
1000P
L209
33NH
R204
2SK3476
Q200
L207
5T
C214
8P
L206
3T
C213
56P
C212
18P
L205
4T
C211
12P
1000P
C210
L204
2.2UH
MA2S077
D200
RF IN
C208
27P
C207
1000P
C206
10P
4T
C205
10P
C204
5T
C203
9P
C202
4T
C201
10P
C200
L200
1UH
CN200
ANT
A
1 2 34
C230
1000P
L21 4
磁珠
C233
470P
TXC
C234
0.1U
BATIN
C008
1000P
TXC
C009
1000P
2SK1824
Date: 18-Sep-2007 Sheet of
File: F:\PCB\A80VHF.ddb Drawn By:
Titl e
A4
Number Revi sio nSize
680
R015
680
Q002
150K
C004
470P
C227
470P
50K
C011
470P
R020
390
DTC114TE
B
C228
1000P
R209
330
R211
330
R212
330
R218
10
C231
470P
R214
1.5K
R215
3.3K
F MMT71 7
Q001
R016
4.7K
R014
R011
150K
DTC114EE
Q003
R006
47K
TXC
180K
TH200
Q005
3.3K
1000P
NJM2904
R021
R210
18
C229
12P
68NH
L21 3
R213
3.9K
2SC4988
Q202
C232
D20 1
HSC 277
VCO OUT
0.39
R019
R018
0.39
R017
0.39
150K
R013
150K
C006
470P
R010
4
3
GND
5
6
C002
470P
R005
1M
R003
0.1U
C003
R002
100K
47K
APC
0.1U
R012
R009
150K
C005
100P
1
2
IC001
10K
VCC
8
7
C001
470P
R004
5.6K
R001
VCO OUT
GND
321
L203
L202
L20 1
4
A
B
- - 39 - -
C
D
Page 40
A-80 VHF SERVICE MANUAL
A
1 2 3 4 56
RXC
C347
0.1U
R331
100
L315
1UH
C348
1000P
BUSY
RXC
DTA114 EE
0.22U
TH300
NC
NC
R340
100K
Q304
C363
0.1U
C362
0.1U
RXC
W/N
33P
C364
R341
CD300
CD
C361
82P
R338
1.8K
R339
1.8K
Q303
DTA114 YE
3.3K
C360
4700P
AF
B
0.01UF
C342
C343
5P
45.05MHz
XF30 0
C344
10P
45.05MHz
XF30 1
NC
C345
R329
470
C346
0.01UF
R330
680K
Q302
2SC2714
C349
16
MIX I
15
14
13
12
11
10
R337
OSCO
E
MIX O
NREC
NDET
RSSI
IFO
QUAD
9
AF
TA311 3 6FN
R336
3.3K
39P
C357
470P
C350
OSC1
VCC
DEC
FILO
FILI
L316
1UH
R332
1.2K
44.595MHz
C351
0.1U
27P
X300
C352
27P
1
2
3
4
5
C353
0.1U
IFI
6
7
390K
8
IC3 0 0
C355
220P
220P
3.9K
R335
120K
C356
0.01U
C358
RXC
+
C359
10U 6.3V
C
0.01U
1000P
C339
20P
150
IF
C327
470P
CF300
455KHz
R333
C354
C326
470P
R334
D
R327
C341
C340
1000P
R323
56K
0.56UH
1000P
0R
R326
33
0.01U
L313
560NH
L312
0R
R325
2.2K
C334
3
4
3SK318
C333
0.1U
R322
56K
L311
100N
R320
30P
L310
6P
C329
20P
R317
100K
R316
47
C323
1000P
R313
100K
D305
HVC35 0B
NC
C320
8P
R311
150
C319
Q301
100K
1
2
1000P
C335
C336
6P
C332
R319
100K
C331
470P
R318
0
L309
68NH
C330
D306
HVC35 0B
C328
2P
0.75UH
L308
L307
56NH
R315
0
R314
470
4.7U 10V
470P
C322
20P
C321
R312
0
34Q300
3SK318
470P
C316
470P
470P
RXC
L314
磁珠
C338
C337
470P
R328
100
R321
HSC27 7
D307
VCO OUT
R324
3.3K
+
C325
C324
L306
磁珠
C318
C317
BUSY
RXC
W/N
GND
Title
Date: 18-Sep-2007 Sheet of
File: F:\P CB\A8 0VHF.dd b Drawn By:
B
Number Revisi onSize
A
APC
APC
BUSY
RXC
W/N
B
- - 40 - -
1
2
R310
NC
R308
68K
VCO OUT
RF IN
AF
IF
RF IN
AF
IF
VCO OUT
C309
18P
R306
100K
C312
470P
56NH
C313
470P
16P
100K
R303
100K
C314
470P
R304
100K
C305
20P
C315
470P
APC
NC
C
R309
100K
1000P
R307
C311
100K
L304
33NH
56NH
L303
C310
7P
D304
HVC350 B
C308
2P
L302
TC301
10P
C307
D303
HVC350 B
R305
HVC35 0B
C306
3P
D302
C304
1P
R302
0
*47NH
L301
C303
0
R301
C302
NC
7T
C300
39P
D300
HSC27 7
D301
HSC27 7
0
C301
15P
D
54321
RF IN
L300
6
R300
Page 41
A-80 VHF SERVICE MANUAL
Specification
Frequency range…………………………………………………………146-174MHz: AH
136-150MHz: AL
136-174MHz: A37
RX power output…………………………………………………………5W
Channel No.………………………………………………………………16
Work voltage……………………………………………………………..7.5V DC±20%
Temperature range…………………………………………………….
-30℃ to ±60℃ (-22℉to +140℉)
Dimension and weight with KNB-15A (7.2V 1200mAh)……………
58(2-5/16) wide×125.5(4-15/16)
high×35(1-3/8)long mm(inch)
380g (0.831bs)
- - 41 - -
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