Icom IC-M604A Service Manual - Page 6
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SECTION 2 2-1 IC-M604 • MAIN UNIT INSIDE VIEWS 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 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
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