Icom IC-R20 Service Manual
Also see for IC-R20: Price listInstruction manualInstruction manualService manual
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2 - 22-2 LOGIC UNIT• Top view • Bottom viewBFO circuitIC6: SN74AHC1GU04DBVRX2: CSBFB543KAF amplifier regulator(Q7: XP1501Q9: 2SB1132)AF amplifier(IC15: TA31056FQ8: 2SA1588)AF pre-amplifiers(Q12, Q16: 2SC4617)+3 regulators(Q10, Q15:2SA1362)Reset IC(IC2: BD5228G)Main CPU(IC3: M30620MCP-129GP [OTHER],M30620MCP-130GP [USA])B-BAND AF circuitQ24: XP6501,Q27: 2SJ144,Q22: 2SC4617,IC7: SM6451BA-BAND AF circuitQ25: XP6501,Q26: 2SJ144,Q23: 2SC4617,IC7: SM6451B+3V reg.(Q17: 2SA1588)Battery daging regulators(Q30: 2SB1201, Q32: 2SC4617, Q33: 2SB1132)LCD(DS12: M3-0243TIY)+3SC reg.(Q13: XP6501)+3S reg.(Q14: 2SA1588)3V reg. IC(IC8, IC9: R1111N321B)Recording/playback IC(IC7: ML2302TB)+3V regulator(IC1: BD5228G,IC10: R1111N321B)Mute (when SQL off)(IC8, IC9:SN74AHC1G66HDBVR)USB interface IC(IC3: FT245BM)Sub CPU(IC2: M30620FCPGP)Flash memory forrecording/playback(IC6: K9F5608UOC-YCBO)2-3 REC UNIT• Top view • Bottom view |
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