Icom IC-R20 Service Manual - Page 7
LOGIC UNIT, REC UNIT, Top view - battery
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2-2 LOGIC UNIT • Top view AF amplifier regulator (Q7: XP1501 Q9: 2SB1132) AF amplifier (IC15: TA31056F Q8: 2SA1588) BFO circuit IC6: SN74AHC1GU04DBVR X2: CSBFB543K AF pre-amplifiers (Q12, Q16: 2SC4617) A-BAND AF circuit Q25: XP6501, Q26: 2SJ144, Q23: 2SC4617, IC7: SM6451B Main CPU (IC3: M30620MCP-129GP [OTHER], M30620MCP-130GP [USA]) 3V reg. IC (IC8, IC9: R1111N321B) 2-3 REC UNIT • Top view USB interface IC (IC3: FT245BM) Mute (when SQL off) (IC8, IC9: SN74AHC1G66HDBVR) Recording/playback IC (IC7: ML2302TB) +3V regulator (IC1: BD5228G, IC10: R1111N321B) • Bottom view LCD (DS12: M3-0243TIY) +3 regulators (Q10, Q15: 2SA1362) Reset IC (IC2: BD5228G) B-BAND AF circuit Q24: XP6501, Q27: 2SJ144, Q22: 2SC4617, IC7: SM6451B +3V reg. (Q17: 2SA1588) +3SC reg. (Q13: XP6501) +3S reg. (Q14: 2SA1588) Battery daging regulators (Q30: 2SB1201, Q32: 2SC4617, Q33: 2SB1132) • Bottom view 2 - 2 Flash memory for recording/playback (IC6: K9F5608UOC-YCBO) Sub CPU (IC2: M30620FCPGP)
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