Inside Views - Icom IC-F4TR Service Manual
Uhf trunked radio
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Also See for IC-F4TR:
- Service manual (7 pages) ,
- Adjustment procedure (4 pages) ,
- Instruction manual (2 pages)
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SECTION 2
• MAIN UNIT
Low-pass filter circuit
Antenna switching
diodes (D1, D8*,
D406: MA77)
APC controller
(IC19: TA75S01F)
FM IF IC
(IC2: TA31136FN)
Microphone
amplifier
(IC3: NJM2902V)
T/R switching diodes
(D3, D4: MA77)
PLL IC
(IC1: SA7025DK-T)
Power amplifier
(Q1: 2SK2595AXTB)
Note: * Located under side of the point.
INSIDE VIEWS
TOP VIEW
BOTTOM VIEW
2 - 1
RF amplifier
(Q12: 3SK293)
1st mixer circuit
(Q13: 3SK241 R)
1st IF filter
(FI1: FL-296)
Microphone mute
(IC21: TC7S66FU)
PLL reference TCXO
(X1: CR-667 15.6 MHz)
VCO circuit
LCD driver
(IC18: LC75834W)
EEPROM
(IC7: X25128SI-2.7T6)
CPU
(IC17: HD64F2144FA20)
DTMF IC
(IC24: LC73872M-TRM)
DTMF encode
(IC15: PCD3312CT)
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