144 MHz FM TRANSCEIVER

iC-t2h iC-t2e-t

INTRODUCTION
This service manual describes the latest service information for the IC-T2H/E-T FM TRANSCEIVER at the time of publication. MODEL VERSION U.S.A. Europe U.K. IC-T2H Italy Asia C.S. America/-1 Taiwan Asia-1 IC-T2E-T Thailand SYMBOL USA EUR UK ITA SEA CSA/-1 TWN ANI THA
To upgrade quality, all electrical or mechanical parts and internal circuits are subject to change without notice or obligation.

DANGER

NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V. Such a connection could cause a fire hazard and/or electric shock. 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 transceivers front end.

ORDERING PARTS

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>
1140006560 S.IC HD6433875A45H IC-T2H 8810009560 Screw B6 ZK IC-T2H MAIN UNIT 1 piece CHASSIS 6 pieces
Addresses are provided on the inside back cover for your convenience.

REPAIR NOTES

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 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 signal generator or a sweep generator. 7. ALWAYS connect a 40 dB or 50 dB attenuator between the transceiver and a deviation meter or spectrum analyser when using such test equipment. 8. READ the instructions of test equipment thoroughly before connecting equipment to the transciver.

TABLE OF CONTENTS

SECTION 1 SECTION 2 SECTION 3 SECTION 4 4-1 4-2 4-3 4-4 4-5 SPECIFICATIONS INSIDE VIEWS DISASSEMBLY INSTRUCTIONS CIRCUIT DESCRIPTION RECEIVER CIRCUITS.... TRANSMITTER CIRCUITS... PLL CIRCUIT.... POWER SUPPLY CIRCUITS... CPU PORT ALLOCATIONS... 4 4

SECTION 5 5-1 5-2 5-3

ADJUSTMENT PROCEDURES PREPARATION.... PLL AND TRANSMITTER ADJUSTMENTS.. RECEIVER ADJUSTMENT.... 5 3
SECTION 6 SECTION 7 SECTION 8 SECTION 9 SECTION 10
PARTS LIST MECHANICAL PARTS AND DISASSEMBLY SEMI-CONDUCTOR INFORMATION BOARD LAYOUTS BLOCK DIAGRAM

SECTION 11

VOLTAGE DIAGRAM

SECTION 1

s GENERAL

Frequency coverage

SPECIFICATIONS

Version U.S.A.

Transmit

Receive

140.000150.000 MHz* 136.000174.000 MHz* 144.000146.000 MHz
Europe, U.K. 144.000146.000 MHz Thailand Italy, Asia, ANI, C.S.A. Taiwan
136.000174.000 MHz* 136.000174.000 MHz* 145.000146.000 MHz 145.000146.000 MHz
Guaranteed frequency range: * 144148 MHz
Mode Current drain (at 9.6 V DC)
: FM (F2, F3) : Transmit at 6.0 W at 5.0 W at 1.0 W max. audio power saved standby 1.6 A (typical) 1.5 A (typical) [Thailand] 0.7 A (typical) 210 mA (typical) 25 mA (typical) 80 mA (typical)
Frequency stability Usable temperature range Antenna connector No. of memory channels Acceptable power supply Frequency resolution Weight (with BP-199)
: 10 ppm (0C to +50C; 32F to 122F) : 10C to 60C; 14F to 140F : BNC (50 ) : 43 ch (40 regulator, 2 scan edges and 1 call) : 9.6 V DC (supplied Ni-Cd cells; negative ground) : 5 kHz and 12.5 kHz : 420 g; 14.8 oz
Dimensions (Projections not included) : 58(W) 140.5(H) 32.3(D) mm; 2932(W) 51732(H) 1932(D) inch

s TRANSMITTER

Output power (9.6 V DC) : 6 W typical (high) 5 W typical (high) [Thailand] only 0.7 W typical (low) : Variable reactance frequency modulation : 5 kHz : Less than 60 dB : 3-conductor 2.5 (d) mm (110) 2 k
Modulation system Max. frequency deviation Spurious emissions External microphone connector

s RECEIVER

Receive system Intermediate frequencies Sensitivity (12 dB SINAD) Squelch sensitivity (threshold) Selectivity Spurious and image refection ratio
(except 2nd IF image frequency)
: Double conversion superheterodyne : 1st 2nd 30.85 MHz 450 kHz
: Less than 0.18 V (122 dBm) : Less than 0.18 V (122 dBm) : More than 15 kHz/6 dB Less than 30 kHz/60 dB : 60 dB (typical) : 500 mW (typical at 10% distortion with an 8 load) : 3-conductor 3.5 (d) mm (18) 8
Audio output power (at 9.6 V DC) External speaker connector
All stated specifications are subject to change without notice or obligation.

SECTION 2

MAIN UNIT

INSIDE VIEWS

TOP VIEW

BOTTOM VIEW

Low-pass filter circuit Antenna switching circuit (D8, D32: HVU131TRF) RF amplifier (Q12: 2SK360IG) Current detector circuit 1st mixer circuit (Q13: 2SK360IG) Crystal filter (FI1: FL-251 30.85 MHz)
Power amplifier (Q1: 2SK3075)
VCO circuit Analog switch* (IC4: BU4066BCFV)

*below the mic.

Microphone amplifier IC (IC3: NJM2902V)
FM IF IC (IC2: TA31136FN) APC control circuit PLL IC (IC1: PD3140GS)
TX/RX switching (D3, D4: MA77)

CPU (IC8)

EEP ROM (IC7: X25040S1-2.7)
PLL reference oscillator (X1: CR514 15.2 MHz)

SECTION 3

Removing the chassis panel

q w e r

DISASSEMBLY INSTRUCTIONS
Unscrew 1 nut, A, and remove 1 nob, B. Unscrew 2 screws, C. Remove the the chassis in the direction of the arrow. Unplug J6 to separate front panel and chassis.

Chassis

C (nickel, 2 mm) 2

J6 (Speaker connector)

Front panel

MAIN UNIT (Top view)

[chassis panel]

Removing the MAIN unit

q w e r Remove the sealing rubber. Unsolder 2 points, D, and unscrew 1 nut, E. Unscrew 2 screws, F, and 6 screws, G (silver, 2 mm), to separate the chassis and MAIN unit. Remove the MAIN unit in the direction of the arrow.

G (silver, 2 mm) 6

Sealing rubber
F (black, 2 mm) 2 G G G G

MAIN unit

SECTION 4

CIRCUIT DESCRIPTION

4-1 RECEIVER CIRCUITS
4-1-1 ANTENNA SWITCHING CIRCUIT
Received signals passed through the low-pass filter (L1L3, C1C7). The filtered signals are applied to the /4 type antenna switching circuit (D8, D32, L15, L16, C76C78). The antenna switching circuit functions as a low-pass filter while transmitting. However, its impedance becomes very high while D8 and D32 are turned ON. Thus transmit signals are blocked from entering the receiver circuits. The antenna switching circuit employs a /4 type diode switching system. The passed signals are then applied to the RF amplifier circuit.
The signals from the RF circuit are mixed at the 1st mixer (Q13) with a 1st LO signal coming from the VCO circuit to produce a 30.85 MHz 1st IF signal. The 1st IF signal is applied to a crystal filter (FI1) to suppress out-of-band signals. The filtered 1st IF signal is applied to the IF amplifier (Q14), then applied to the 2nd mixer circuit (IC2, pin 16).
4-1-4 2ND IF AND DEMODULATOR CIRCUITS
The 2nd mixer circuit converts the 1st IF signal to a 2nd IF signal. A double conversion superheterodyne system (which converts receive signal twice) improves the image rejection ratio and obtains stable receiver gain. The 1st IF signal from the IF amplifier is applied to the 2nd mixer section of the FM IF IC (IC2, pin 16), and is mixed with the 2nd LO signal to be converted to a 450 kHz 2nd IF signal. The FM IF IC contains the 2nd mixer, limiter amplifier, quadrature detector and active filter circuits. A 30.4 MHz 2nd LO signal is produced at the PLL circuit by doubling its reference frequency. The 2nd IF signal from the 2nd mixer (IC2, pin 3) passes through a ceramic filter (FI2) to remove unwanted heterodyned frequencies. It is then amplified at the limiter amplifier (IC2, pin 5) and applied to the quadrature detector (IC2, pins 10, 11) to demodulate the 2nd IF signal into AF signals.

4-1-2 RF CIRCUIT

The RF circuit amplifies signals within the range of frequency coverage and filters out-of-band signals. The signals from the antenna switching circuit pass through a bandpass filter (D10, L26) after being amplified at the RF amplifier (Q29). The filtered signals are amplified at another RF amplifier (Q12), then applied to the 1st mixer circuit after out-of-band signals are suppressed at the bandpass filter (D11, D12, L18, L19, C92, C94, C96, C236). D10D12 employ varactor diodes that track the bandpass filters and are controlled by the T4/PWR signal from the CPU (IC8, pins 5459). These diodes tune the center frequency of an RF passband for wide bandwidth receiving and good image response rejection.
4-1-3 1ST MIXER AND 1ST IF CIRCUITS
The 1st mixer circuit converts the received signal to a fixed frequency of the 1st IF signal with a PLL output frequency. By changing the PLL frequency, only the desired frequency will pass through a crystal filter at the next stage of the 1st mixer.

4-1-5 AF CIRCUIT

The AF amplifier circuit amplifies the demodulated AF signals to drive a speaker. AF signals from the FM IF IC (IC2, pin 9) are applied to the analog switch (IC4, pin 1) via the AF filter circuit (IC3b, pins 6, 7). The output signals from pin 11 are applied to the AF power amplifier (IC5, pin 4) after passing through the [VOL] control (VR board, R1).
2nd IF AND DEMODULATOR CIRCUITS
2nd IF filter 450 kHz FI2 Squelch level adjustment pot R7 Noise detector Limiter amp. Trigger RSSI 16 Mixer X1 15.2 MHz PLL IC IC1
Active filter FM detector 9

IC2 TA31136F

1st IF from the IF amp.
AF signal "DET" X3
"NOIS" signal to the CPU pin 19 R5 "SD" signal to the CPU pin 98
The AF signals from the [VOL] control are applied to the AF power amplifier circuit (IC5, pin 4) to obtain the specified audio level. The amplified AF signals, output from pin 10, are applied to the internal speaker (SP1) via the [SP] jack when no plug is connected to the jack.

4-2 TRANSMITTER CIRCUITS

4-2-1 MICROPHONE AMPLIFIER CIRCUIT
The microphone amplifier circuit amplifies audio signals with +6 dB/octave pre-emphasis characteristics from the microphone to a level needed for the modulation circuit. The AF signals from the microphone are applied to the microphone amplifier circuit (IC3c, pin 10). The amplified AF signals are passed through the low-pass filter circuit (IC3d, pins 13, 14) via the analog switch (IC4, pins 2, 3). The filtered AF signals are applied to the modulator circuit after passing through the analog switch (IC4, pins 8, 9) and the deviation adjustment pot (R119).

4-1-6 SQUELCH CIRCUIT

A squelch circuit cuts out AF signals when no RF signals are received. By detecting noise components in the AF signals, the squelch switches the analog switch. A portion of the AF signals from the FM IF IC (IC2, pin 9) are applied to the active filter section (IC2, pin 8) where noise components are amplified and detected with an internal noise detector. The squelch input level adjustment pot (R92) is connected in parallel to the active filter input (pin 8) to control the input noise level. The trigger circuit converts the detected signals to a HIGH or LOW signal and applies this (from pin 13) to the CPU (IC8, pin 19) as the NOIS signal. When the CPU receives a HIGH level NOIS signal, the CPU controls the RMUT line to cut the AF signals at the analog switch IC (IC4). At the same time, the AFON line controls the AF regulator circuit (Q15, Q16) to cut out the VCC power source for the AF power amplifier (IC5).

4-2-2 MODULATION CIRCUIT

The modulation circuit modulates the VCO oscillating signal (RF signal) using the microphone audio signal. The audio signals (SHIFT) change the reactance of D6 to modulate an oscillated signal at the VCO (Q7, Q8). The oscillated signal is amplified at the buffer-amplifiers (Q4, Q6), then applied to the T/R switching circuit (D3, D4).
4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS
The signal from the VCO circuit passes through the T/R switching circuit (D3) and is amplified at the buffer (Q3), drive (Q2) and power (Q1) amplifiers to obtain 5.5 W (4.5 W: Thailand only) of RF power (at 9.6 V DC/typical). The amplified signal passes through the antenna switching circuit (D1), and low-pass filter (L1L3, C1C7) and is then applied to the antenna connector (J1). The bias current of the drive (Q2) and power (Q1) amplifiers is controlled by the APC circuit to stabilize the output power.

Analog switch (IC4)

DET signal to pins 9, 10 via IC3d RMUT signal R5 to the [VOL] control from IC3d
MIC signal MMUT signal R5C
4-2-4 CURRENT DETECTOR CIRCUIT
The current detector circuit (Q9, Q28, R161) detects total driving current of the drive and the power amplifiers, using the current sensor (R161). The differential amplifier (Q9) detects voltage differences between the current sensor input and output voltages, then outputs control voltage to the APC circuit.
to the VCO circuit for modulation

APC circuit

VCC T5
Current detector circuit R161

RF signal from PLL

Q2 Driver amp.

Q1 Power amp.

to antenna
SQ37 TAPC control circuit 1 IC3a

4-2-5 APC CIRCUIT

The APC circuit (IC3a, Q37) protects drive and power amplifiers from excessive currents and selects HIGH or LOW output power. The output voltage from the current detector circuit is applied to the inverting amplifier (IC3a, pin 2), and the T4/PWR signal from the CPU (IC8, pins 5459) is applied to the other input for reference. When the driving current increases, the input voltage of the differential amplifier (Q9, pin 1) will be decreased. In such cases, input voltage of the inverting amplifier (pin 2) is increased to decrease the output power. Q37 is controlled by the TXC signal from the CPU (IC8, pin 50) to select HIGH or LOW output power.
A portion of the VCO signal is amplified at the buffer-amplifier (Q4, Q6) and is then applied to the receive 1st mixer or transmit buffer-amplifier circuit via the T/R switching diode (D3, D4).
4-4 POWER SUPPLY CIRCUITS

VOLTAGE LINE Line

BATT VCC Description The voltage from the attached battery pack/case. The same voltage as the BATT line controlled by the [PWR/VOL] control. Common 5 V converted from the VCC line by the reference regulator circuit (IC6). The output voltage is applied to the CPU (IC8) and the 5V regulator circuit, etc. Common 5 V converted from the VCC line at the 5 V regulator circuit (Q18, Q19) using the CPU5 line voltage for reference. Transmit 5 V converted from the VCC line at the T5 regulator circuit (Q22, Q40). Receive 5 V converted from the 5 V line at the R5 regulator circuit (Q21). The regulated voltage is applied to the receiver circuits. Common 5 V converted from the 5V line by the S5 regulator circuit (Q20). The same voltage as the 5V line for the optional HM-75A or HS-51 through a resistor (R132).

4-3 PLL CIRCUIT

A PLL circuit provides stable oscillation of the transmit frequency and receive 1st LO frequency. The PLL output compares the phase of the divided VCO frequency to the reference frequency. The PLL output frequency is controlled by the divided ratio (N-data) of a programmable divider. The PLL circuit contains the VCO circuit (Q7, Q8, D6). The oscillated signal is amplified at the buffer-amplifiers (Q5, Q6) and then applied to the PLL IC (IC1, pin 2). The PLL IC contains a prescaler, programmable counter, programmable divider, phase detector and charge pump, etc. The entered signal is divided at the prescaler and programmable counter section by the N-data ratio from the CPU. The divided signal is detected on phase at the phase detector using the reference frequency. If the oscillated signal drifts, its phase changes from the reference frequency, causing a lock voltage change to compensate for the drift in the oscillated frequency. 5V

S5 OPT

PLL circuit
VCO board Q7, Q8 Buffer Q6

Buffer Q4

to transmitter circuit to 1st mixer circuit

D4 Loop filter Buffer Q5

8 30.4 MHz signal to the FM IF IC 17

Phase detector 2

Programmable counter

Prescaler

PLST SCK SO
Programmable divider 16 X1 15.2 MHz

Shift register

4-5 PORT ALLOCATIONS
Pin Port number name CIN Description Input port for CTCSS signal for decoding. 5460 Pin Port number name Description
RESET Input port for the reset signal. CSIFT SCK SI SO Output reference oscillator for the CPU control signal. Output clock signal to the PLL (IC1) and EEPROM (IC7) ICs, etc. Input port for the data signals from EEPROM (IC7), etc. Output data signal to the PLL (IC1) and EEPROM (IC7) ICs, etc. Input port for PLL unlock signal from the PLL IC (IC1). High: During unlock Input port for the cloning signal.
Output ports for: tunable bandpass filter control T4/PWR signal while receiving. reference signal for the APC circuit while transmitting. BEEP DTMF PTT TEMP SD Outputs beep audio signals. Outputs DTMF signals while pushing the keypad during transmit. Input port for the [PTT] switch. Input port for internal temperature detection. Input port for the S-meter signal from the FM IF IC (IC2, pin 12). Input port for overvoltage detection from the connected power supply or battery pack.

UNLK CLIN

CLOUT Output port for the cloning signal. PLST NOIS CONT Outputs strobe signals to the PLL IC (IC1). Input port for noise signals (pulse type) from the FM IF IC (IC2, pin 13). Outputs LCD contrast control signal. High: When normal level is selected.
KS0KS5 Output ports for key matrix. Outputs the analog switch (IC4) control signal. Low : While DTMF or ANI signals are output. Outputs the analog switch (IC4) control signal. Low : While muted.
KR0KR5 Input ports for key matrix. R5C S5C Outputs R5 regulator control signal. Low : While receiving Output S5 regulator control signal. Low : While power is ON. Outputs transmit output power select (HIGH or LOW) signal. Low : HIGH power is selected. Input ports for the [PTT] switch. High: While [PTT] is pushed Outputs LCD backlight control signal. High: When backlighting is ON Outputs the regulator circuit control signal for the AF amplifier. High: While AF amplifier is activated.

T5C LIGHT

SECTION 5

5-1 PREPARATION

ADJUSTMENT PROCEDURES
s REQUIRED TEST EQUIPMENT

EQUIPMENT

DC power supply

GRADE AND RANGE

Output voltage Current capacity Measuring range Frequency range Impedance SWR : 9.6 V DC : 5 A or more : : : : 110 W 120300 MHz 50 Less than 1.2 : 1
Audio generator Attenuator Standard signal generator (SSG) DC voltmeter Oscilloscope AC millivoltmeter
Frequency range Measuring range Power attenuation Capacity Frequency range Output level Input impedance Frequency range Measuring range Measuring range : 3003000 Hz : 1500 mV : 40 or 50 dB : 10 W or more : 0.1300 MHz : 0.1 V32 mV (127 to 17 dBm) : 50 k/V DC or better : DC20 MHz : 0.0120 V : 10 mV10 V
RF power meter (terminated type)

Frequency counter

Frequency range : 0.1300 MHz Frequency accuracy : 1 ppm or better Sensitivity : 100 mV or better Frequency range Measuring range Input impedance : DC300 MHz : 0 to 5 kHz : 10 M/V DC or better
FM deviation meter Digital multimeter

s CONNECTIONS

FM deviation meter RF power meter Frequency counter DC power supply
Attenuator 40 dB or 50 dB
Standard signal generator
CAUTION: DO NOT transmit while
an SSG is connected to the antenna connector.
see detailed illustration below

connect (soldering) here

Power supply connection JIG connector
to the [SP] jack connect (soldering) , line here 68 k VR board
5-2 PLL AND TRANSMITTER ADJUSTMENTS
ADJUSTMENT PLL LOCK VOLTAGE ADJUSTMENT CONDITION UNIT 1 Operating frequency : 146.000 MHz Receiving MEASUREMENT LOCATION 1.40 V VALUE ADJUSTMENT POINT UNIT VCO board ADJUST L11
MAIN Connect a digital multimeter to the check point LV.
REFERENCE 1 Operating frequency : 146.000 MHz Transmitting FREQUENCY
Top Connect an RF power 146.000000 MHz MAIN panel meter or a terminator to the antenna connector and loosely couple a frequency counter. Top Connect an RF power panel meter to the antenna connector. 4.5 W [THA] 5.5 W [other]

OUTPUT POWER

1 Operating frequency : 146.000 MHz HIGH/LOW switch : HIGH Connect the JIG to the [SP] jack. Transmitting 2 HIGH/LOW switch Transmitting : LOW

1.0 W 4.5 kHz

Front Push [ ] Panel or [ ] switch while transmitting. MAIN R119

FM DEVIATION

Top Connect an FM devia1 Operating frequency : 146.000 MHz panel tion meter to the HIGH/LOW switch : HIGH antenna connector Connect an audio generator to the through an attenuator. [MIC] jack and set as : 1 kHz/90 mV Set an FM deviation meter as: HPF : OFF LPF : 20 KHz De-emphasis : OFF Detector : (PP)/2 Transmitting

MAIN unit

L11 PLL lock voltage adjustment
C68 Reference frequency adjustment LV PLL lock voltage check point R119 FM deviation adjustment

Bottom view

Top view

5-3 RECEIVER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION UNIT MEASUREMENT LOCATION VALUE ADJUSTMENT POINT UNIT MAIN ADJUST Adjust in sequence L18, L19
MAIN Connect a digital volt- Maximum level SENSITIVITY 1 Operating freq. : 146.000 MHz Connect an SSG to the antenna conmeter to check point S. nector and set as: Frequency : 146.000 MHz Level : 1 V* (107 dBm) Modulation : 1 kHz Deviation : 3.5 kHz Receiving S-METER Front LCD 1 Operating freq. : 146.000 MHz Connect the JIG to the [SP] jack. panel Connect an SSG to the antenna connector and set as: Frequency : 146.000 MHz Level : 0.5 V* (113 dBm) Modulation : OFF Receiving 2 Set an SSG output level for the S- SSG Output level meter to S3 (3 dot). SQUELCH 1 Operating freq. : 146.000 MHz Spea SQL set : Auto ker Connect an SSG to the antenna connector and set as: Frequency : 146.000 MHz Level : 0.1 V* (127 dBm) Modulation : 1 kHz Deviation : 3.5 kHz Receiving 0.890.28 V (106 to 118 dBm) At the point where the AF signals just disappear.
Front Push and panel hold the [ ] switch.

Verify MAIN R92

*This output level of the standard signal generator (SSG) is indicated as SSGs open circuit.
Sensitivity L18 adjustment L19
R92 Squelch adjustment S Sensitivity check point

SECTION 6 PARTS LIST

[MAIN UNIT]

REF NO.

IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 IC11

DESCRIPTION

S.IC S.IC S.IC S.IC S.IC S.IC S.IC S.IC S.IC S.IC S.IC S.IC PD3140GS-E1 (DS8) TA31136FN (D/EL) NJM2902V-TE1 BU4066BCFV-E1 TA7368F (TP1) S-81250PG-PD-T1 X25040SI-2.7T6 HD6433875A41H HD6433875A45H LC73881M-TLM TC4S01F (TE85R) S-80742SL-A6-T1

ORDER NO.

1130004170 1110003500

X1 X2 X3 X4

XTAL S.XTAL S.CERAMIC S.DISCRIMINATOR
CR-514 (15.200000 MHz) CR-584 (6.79966 MHz) EFOS4194E3 [ANI] only CDBCA450CX24
[THA] only other [ANI] only [ANI] only
Q1 Q2 Q3 Q4 Q5 Q9 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q25 Q27 Q28 Q29 Q31 Q32 Q33 Q34 Q35 Q36 Q37 Q39 Q40

1590001170

S.FET S.FET S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.FET S.FET S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.FET S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR
2SK3075 (TE12L) 2SK3074 (TE12L) 2SC3356 R25-T2B 2SC4403-3-TL 2SC4226-T2 R25 XP6401-(TX) 2SK360IG-TR (D/E) 2SK360IG-TR (D/E) 2SC4215-O (TE85R) 2SB1201-S-TL XP6501-(TX).AB 2SB1462-R(TX) 2SB1201-S-TL XP6501-(TX).AB 2SA1588-GR (TE85R) 2SA1588-GR (TE85R) 2SB1132 T100 R 2SC4081 T107 S 2SC4081 T107 S 2SB1132 T100 R 2SC4081 T107 S 2SC4226-T2 R25 DTC144TU T107 UN521D (TX) 2SC4081 T107 S 2SK880-Y (TE85R) 2SC4081 T107 S 2SC4081 T107 S DTA144EUA T106 DTA114TUA T106 XP1501-(TX).AB

7030003680 7030003300

S.=Surface mount 6-1
R70 R71 R76 R77 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R112 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R125 R126 R127 R128 R130 R131 R132 R133 R134 R137 R139 R141 R144 R146 R147 R148 R149 R151 R155 R156 R157 R158 R159 R160 R161 R162 R163 R166 R167 R168 R169 R174 R176 R178 R181 R182
S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.THERMISTOR S.RESISTOR S.TRIMMER S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.TRIMMER S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.THERMISTOR ERJ3GEYJ 222 V (2.2 k) ERJ3GEYJ 560 V (56 ) ERJ3GEYJ 222 V (2.2 k) ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 823 V (82 k) ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 122 V (1.2 k) ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 391 V (390 ) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 823 V (82 k) ERJ3GEYJ 152 V (1.5 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 223 V (22 k) NTCCF2012 3NH 153KC-T ERJ3GEYJ 153 V (15 k) RV-152 (RH03A3AJ4X0HA) 223 ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 564 V (560 k) ERJ3GEYJ 394 V (390 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 184 V (180 k) ERJ3GEYJ 184 V (180 k) ERJ3GEYJ 682 V (6.8 k) ERJ3GEYJ 182 V (1.8 k) ERJ3GEYJ 105 V (1 M) ERJ3GEYJ 100 V (10 ) ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 101 V (100 ) ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 184 V (180 k) ERJ3GEYJ 394 V (390 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 105 V (1 M) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 124 V (120 k) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 152 V (1.5 k) ERJ3GEYJ 103 V (10 k) RV-110 (RH03A3AS4X0AA) 473 ERJ3GEYJ 153 V (15 k) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 182 V (1.8 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 123 V (12 k) ERJ3GEYJ 100 V (10 ) ERJ3GEYJ 100 V (10 ) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 471 V (470 ) MCR10EZHJ 470 (471) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 333 V (33 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 471 V (470 ) MCR10EZHJ 18 (180) MCR10EZHJ 18 (180) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 104 V (100 k) MCR10EZHJ 120 (121) ERJ1WRSJR15U (0.15 ) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 153 V (15 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 822 V (8.2 k) ERJ3GEYJ 153 V (15 k) ERJ3GEYJ 562 V (5.6 k) ERJ3GEYJ 472 V (4.7 k) RR0816R-104-D (100 k) NTCCF2012 4AH 473KC-T

R242 R243 R245 R246 R247 R248 R249 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R262 R263 R264 R266 R267 R268 R269 R272 R279 R280 R281 R282 R283 R284 R285 R286 R287 R289 R290 R291 R292 R294

7030003560

S.=Surface mount 6-2

R295 R296 R297 R298

S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR ERJ3GEYJ ERJ3GEYJ ERJ3GEYJ ERJ3GEYJ V V V V (1 k) (1 k) (1 k) (22 )

7030003440 7030003240

C118 C119 C120 C121 C122 C123 C124 C125 C126 C128 C129 C131 C132 C133 C134 C135 C136 C137 C138 C139 C140 C141 C142 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 C155 C156 C157 C158 C159 C160 C161 C162 C163 C164 C165 C166 C167 C169 C170 C171 C172 C173 C174 C175 C176 C177 C179 C193 C194 C195 C196 C197 C198 C199 C200 C201 C202 C203 C204 C205 C211 C212 C213 C217 C218 C220 C222 C225 C226 C227 C228 C230
S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.TANTALUM S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.TANTALUM S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.ELECTROL S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.TANTALUM S.CERAMIC S.CERAMIC S.ELECTROL S.TANTALUM S.ELECTROL S.CERAMIC S.CERAMIC S.ELECTROL S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.ELECTROL S.ELECTROL S.ELECTROL S.ELECTROL S.TANTALUM S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.TANTALUM
C1608 JB 1E 103K-T-A C2012 JF 1C 105Z-T-A C1608 JB 1C 104KT-N C1608 JB 1H 471K-T-A C1608 JB 1H 471K-T-A C1608 JB 1H 102K-T-A C1608 JB 1E 103K-T-A C1608 JB 1H 332K-T-A C1608 JB 1C 123K-T-A C2012 JF 1C 105Z-T-A ECST0JY156R C1608 JB 1E 103K-T-A C1608 JB 1H 222K-T-A C1608 JB 1C 104KT-N C1608 CH 1H 121J-T-A C1608 CH 1H 221J-T-A C1608 JB 1H 222K-T-A C1608 JB 1C 473K-T-A ECST0JY335R C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1C 104KT-N C1608 JB 1H 102K-T-A ECEV1AA101SP C1608 JB 1H 102K-T-A C1608 JB 1C 104KT-N C1608 JB 1C 104KT-N C1608 JB 1C 104KT-N ECST1AY106R C1608 CH 1H 470J-T-A C1608 JB 1C 104KT-N ECEV1AA221P ECST0JY106R ECEV1CA100SR C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A ECEV0JA101SP C1608 JB 1H 102K-T-A C1608 JB 1E 103K-T-A C1608 JB 1E 103K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 CH 1H 220J-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 471K-T-A ECEV1CA470SP ECEV0JA220SR ECEV0JA220SR ECEV0JA220SR ECST0JY156R C1608 JB 1E 103K-T-A C1608 CH 1H 060D-T-A C1608 CH 1H 270J-T-A C1608 CH 1H 180J-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1E 103K-T-A C1608 JB 1E 103K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1H 102K-T-A C1608 JB 1C 104KT-N C1608 JB 1E 103K-T-A C1608 JB 1C 104KT-N C1608 JB 1C 104KT-N C1608 JB 1H 102K-T-A C1608 JB 1C 104KT-N C1608 JB 1C 473K-T-A C1608 JB 1C 123K-T-A C1608 JB 1C 473K-T-A C1608 JB 1C 273K-T-A C1608 JB 1H 332K-T-A ECST1EY474R

B 5195A

7700002160 MICROPHON

KUC3523-040245

[VR BOARD]

SS.SWITCH JPM1990-2013R

7210002950 VARIABLE

RV-312 (RK0971110)

W1 W10

7030003860 S.JUMPER 7030003860 S.JUMPER
ERJ3GE JPW V ERJ3GE JPW V
C1 EP1 EPPCB B 5193B 8930042590 LCD CONTACT SRCN-1922-SP-N-W EP1

4030006860 S.CERAMIC

C1608 JB 1H 102K-T-A

910050701

B 5196A

S.=Surface mount 6-4

SECTION 7

7-1 CABINET PARTS

[CHASSIS PARTS]

REF NO. ORDER NO.

MECHANICAL PARTS AND DISASSEMBLY
DESCRIPTION QTY. REF NO. ORDER NO. DESCRIPTION QTY.
J1 SP 1 MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 MP10 MP11 MP13 MP14 MP15 MP16 MP17 MP18
6510020350 ANT connector BNC-RSpeaker K036NA500-2078 Chassis 1902 Front panel 1922 PTT panel 1922 Contact base Knob N10-Key (A) 1922 MIC cap 1922 DC cap 1922 Plus terminal 1922 Minus terminal SP net (A) FXLCD holder 1922 Reflector 1922 Window plate (E) 1902 MIC seal 1902 Rear sheet (C) [THA] 1902 Rear sheet (J) [SEA], [CSA/-1], [TWN], [ANI] 1902 Rear sheet (K) [USA] 1902 Rear sheet (L) [EUR], [UK], [ITA] Nut antenna connector-101 Screw PH M24 ZK Screw PH BT M24 NI-ZU Screw PH BT M24 NI-ZU
MP23 MP24 MP25 MP26 MP28 MP30 MP31 MP32 MP33 MP34 MP35

8510012000

Screw PH BT M24 NI-ZU Screw PH BT M26 ZK Screw PH BT M26 ZK Hex nut (A) 1902 VCO cover 1902 PA shield plate-1 [EUR], [UK], [ITA] Isolating sheet FB [EUR], [UK], [ITA] Isolating sheet EZ 1902 MIC sponge Sponge (FZ) 2191 VR rug plate
REF NO. ORDER NO. DESCRIPTION QTY.

DS 1 EP 2 MP1

5030001460 LM-1462B 8930042590 LCD contact SRCN-1922-SP-N-W PA heat sink

MP19 MP20 MP21 MP22

8810009510 8810009510

VCO case

Screw abbreviations: PH: Pan head B0: Self-tapping NI: Nickel ZK: Black

7-2 ACCESSORIES

3030000420 NICD cel-KR0.7AAUR SAFT [USA], [EUR], [UK], [ITA], [CSA/-1] 3030000450 NICD cel-KR0.7AAUR ASIA [SEA], [THA], [TWN], [ANI] Optional products Charger BC-110A [USA], [CSA], [TWN] Optional products Charger BC-110D [EUR], [ITA], [SEA], [THA], [ANI] Optional products Charger BC-110C [CSA-1] 3310001790 Antenna FA-B2C ACC 8010016831 Battery case BP-1922 Belt clip

BT1 MP1

EP 2 EP 3 MP1
MP20 (C) J1 (C) MP10 (C) MP26 (C) MP4 (C) MP23 (C)

MP18(C) MP22 (C) MP32 (C) MP35 (C) VR board MP21 (C) MP7 (C) MP21 (C) MP33 (C) MP5 (C) MP17 (C) MP31 (C) MP30 (C) MP19 (C) SP1 (C) MP21 (C) MP28 (C) MP1 (VCO) MP21 (C) MP24 (C) MAIN unit MP21 (C) MP15 (C) MP16 (C) MP6 (C) DS1 (M) MP14 (C) MP8 (C) EP2 (M) MP34 (C) MP1 (M) MP25 (C) MP1 (C) MP11 (C)
MP2 (C) (M) : MAIN unit (VCO) : VCO board (C) : CHASSIS

SECTION 8

8 - 1 TRANSISTORS

NAME SYMBOL

PARTS LIST SEMI-CONDUCTOR INFORMATION

8 - 2 DIODES

INSIDE VIEW

SYMBOL

K3 K2 K1

2SA1588 - GR

2SK880 - Y

MA6S121

A3 A2 A1

2SB1132 - R

DTA114TU DTC144TU DTC144EU

DA113W

2SB1201-S

UN521D

DA204U

SB07-03C-TB

E C2 A
2SC3356 2SC4081 2SC4215 2SC4226 2SC4403 R25 S O RR25 BS QO R25 LY3

XP1501 - AB

DAP202U

2SK3074

XP6401

HVU131TRF

HVU350TRF 2SK3075 RF72

2SK360IG - TR

MA111 MA2S077

SECTION 9

9 - 1 MAIN UNIT

BOARD LAYOUTS

The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. TOP VIEW

ANTENNA J1 (CHASSIS)

VCO OUT S5V 1 SPG SP GND SHIFT LV

SPEAKER

VR BOARD
BATT VOL IN VOL OUT GND VCC

MICROPHONE

9 - 3 VCO BOARD 9 - 2 VR BOARD

TOP VIEW TOP VIEW

BATT VOL IN VOL OUT R1 GND VCC MAIN UNIT J6

VCO OUT

MAIN UNIT

BOTTOM VIEW

CHARGER J4
The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board.

J1 (CHASSIS)

VCOOUT S5V GND SHIFT LV
EMIC EXT.MIC J2 OPT AF OUT EXT.SP J3 SP CLONE

VCO BOARD

PTT SWITCH
ANT Q2 Q1 IC1 R33, R34, C48 PLL IC BUFFER VCO BUFFER BUFFER LOOP FILTER TX/RX SW LPF PRE DRIVE PWR AMP IMP MATC ANT SWITCH Q7, Q8 D5, D6 Q6 D3, D4 Q3 D1, D8, D32 L1, L2, L3 Q4

REF X1 15.2 MHz

VCO board
Q52 VCC IC3a CUR DET APC T4/PWR Q9, Q28, R161 ISENS BUFFER SHIFT SW Q34 BUFFER X4: 450 kHz 2nd Lo 30.4 MHz IC2 Q13 BPF RF AMP BPF Q12 DET IF DET IC IF AMP BPF 1st IF : 30.85 MHz Q14 FI1 L18, L19 L16, L17 Q29 RF AMP

SECTION 10

L13, L25 BPF

Q15, Q16

AF REG

105.15 143.15 MHz

PTT CONT

IC5 BPF SD NOIS

AF AMP

SQL (INSIDE) FI2

T4/PWR
COMMON LINE Rx LINE Tx LINE

VOL IN

BLOCK DIAGRAM
CLONE IC3C IC3d LPF MIC AMP T5 RM CTCSS TONE DS4 TX LED MM S5 S5 REG.

BUFFER

R105, C133

ANALOG SWITCH Q20

10 - 1

VOL OUT

[ANI] X3: 4.194 MHz only VCC

VR IC6

Q18, Q19 5V +5 REG. Q21 VOL IN R5 REG. R5 R5C +5 CPU
DTMF DECODER IC9, IC10, Q39 CLV CPU 5 D14 CLOCK SHIFT IC11, D15,Q23 RESET Q33

EXT. MIC

MIC JACK HPF

AF OUT

Q31, D27

LPF Q35

IC8 CPU X2: 6.8 MHz COM 1-4 T5 REG. T5C LPF Q36 DTMF BUFFER DTMF/BEEP CTDA 0-2 SEG 29-52

SP JACK

PRE ENPHA

Q22, Q40

Q27, D24, D25

I. LIM

CHARGE
BATT Q25 DS2, DS3 LCD LIGHT EEPROM LED SW IC7

KEY MATRIX

VR board

POWER SWITCH

CLONE IN

CLONE OUT

VOL IN VOL OUT AF OUT MIC

J1 SP SPG

VCC T5 R5 S5 5V

SP1 K036NA500-26A27

VCC T5 R5 VCC T5 CPU5 VCC T5 CPU5 TEMP 5 NC 4 NC R182 NTCCF20124AH 473 k Rk

R289 1k

C164 0.001

C148 0.1

Q20 2SA1588 Q22 2SB1132 Q18 2SB1201

IC11 S-80742SL-A6

C256 0.001

TX: 5 RX: 0

VDD VSS

Q40 XP1501

R139 4.7 k
C161 0.R137 4.7 k R133 1k

IC6 S-81250PG-PD

C247 0.001 Rk Rk

X2 CR-584 D14 MA2S077

O G C160 0.01 C159 0.001 R134 4.7 k

Q36 2SC4081

C230 0.47 +

R101 1M C193 6p Cp

RV-312 R1

VOL IN VOL OUT GND

C157 0.001 C158 100

C156 0.001 C155 10

C1 0.001

R141 4.7 k

C162 0.001

C278 15

C196 0.001

R281 1k

PB1/AN1 PB2/NA2 PB3/AN3 PB4/AN4 PB5/AN5 PB6/AN6 PB7/AN7 AVREF VTREF TONED TONEM AVCC PE3/SEG52/CL2 PE2/SEG51/CL2 PE1/SEG50/DO PE0/SEG49/M PD7/SEG48 PD6/SEG47 PD5/SEG46 PD4/SEG45 PD3/SEG44 PD2/SEG43 PD1/SEG42 PD0/SEG41 VCC