Inside Views; Ic-M604 - Icom IC-M604 Service Manual

SECTION 2

2-1 IC-M604

• MAIN UNIT
RF amplifier
(Q1: 3SK294)
1st mixer circuit
D11: HSB88WS
L18: 617DB-1919=P3
L19: 617DB-1327=P3
TX/RX switch circuit
(D42, D43*: MA77)
RX VCO circuit
Q12: PMBFJ310
D32, D33: HVC358B
2nd mixer
(IC1: TA31136FNG)
PLL IC
(IC12: µPD3140GS)
Reference oscillator
(X4: CR-827 15.3 MHz)
• LOGIC UNIT
Reset IC
(IC2: S-80942CNMC-G9C)
DIAL UNIT
SQL UNIT
VR UNIT

INSIDE VIEWS

2 - 1
RF amplifier (for CH70)
(Q7: 3SK294)
Antenna switch circuit
1st mixer circuit (for CH70)
D21: HSB88WS
L48, L49: 617DB-1327=P3
Power amplifier*
(IC13: RA35H1516M)
TX VCO circuit
Q18: PMBFJ310
D39, D40: 1SV214
2nd mixer (for CH70)
(IC6: TA31136FN)
D/A converter
(IC15: M62363FP-650C)
* Located under side of the point
LOGIC UNIT
EEPROM
(IC4: HN58X24164TI)
CPU
(IC1: HD64F2633FRF28V)
System clock
(X1: CR-691 9.8304 MHz)
Speaker