KCH-1660BLOCK DIAGRAMQ1: 2SC2873(Y)FD2: 02CZ9.1(X,Y)F90BL290BL90BL14.7456MHzX1L77-1956-05VR1R31-0672-05S2SWQ7, 8DTC144EEHOOKD0-D7, A0, WR, CS0 BUSSWIC5: TC74LCX245FKIC6: TC7WZ245FK-FSWQ5UPA672T-ASWQ15UMG4NTXLEDD34, 35SWQ14UMG4NBUSYLEDD32, 33SWQ6UMG4NLCDBACKLIGHTD6, 7, 9, 10LCDCONTROL UNIT (X53-4360-20)IC93062LFGPUKCTACPUVccAVcc50MAVR5VSBIC4TA7805FQAVR3.3VIC8XC6204B332M33D90BLAVR9V1.KVL2.TRD3.MIC4.ME5.PS6.E7.SB8.RESETJ2POWSWSWQ10, 11DTC114TEMICAMPIC3NJM2904V-ZBS24MAIN MICMIC1SUB MICMIC2KEY &BACKLIGHTS15-23D24-31SWQ12, 13UMG4NPF1-5, ZUP, ZDN, EUP, EDNSBDM1/DM212 KEY &BACKLIGHTS3-14D11-1490BL2KEYO0-3, KEYI0-2VOLTAGEdoublingInverterIC1LM2682MMXKVL, RESET90BL2AVR9VQ3: 12A02CHD3: MA2S111-F33DIC2LMC7101BIM5VOLPTTHOOKTXGTXBUSYBUSYRDM1DM2LCDRSTLCONTPSTXDRXDTRDMIC