Sharp DV-550U Service Manual

Also see for DV-550U: Technical manual

DV-550U12-7-2. Mode change tableInputs Output QG LE DH X X ZL H L LL H H HL L X Q 0H : High levelL : Low levelX : ImmaterialZ : High impedanceQ 0 : Level of Q before the indicated steady input conditionswere established.12-7. IC503 IX1479GEGATE ARRAY12-7-1. Block Diagram1234567891011121314151617181920212223242G2Q82Q7GND2Q62Q52Q42Q32Q22Q11Q81Q71Q61Q51Q41Q31Q21Q11GGNDGNDGNDVccVcc484746454443424140393837363534333231302928272625 2LE2D82D7GND2D62D52D42D32D22D11D81D71D61D51D41D31D21D11LEGNDGNDGNDVccVccGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ DGQ D12-1112-6-1. Block DiagramIDRegisterCSRESRsDQ8-15 DQ 0-7OUTPUT MULTIPLEXERProgram EraseVoltage SwitchBYTE#CUIWSM16-KBYTEBlock 3116-KBYTEBlock 3016-KBYTEBlock 116-KBYTEBlock 0CE#OE#WE#RP#RY/BY#V PPV CCGNDY GATING/SENSINGX-DECODERY-DECODERInputBufferADDRESSQUEUELATCHESADDRESSCOUNTERA-1.0~17OutputBufferOutputBufferInputBufferInputBufferI/O LogicDATAQUEUEREGISTERRegisterDataComparator