Yamaha-RX777-rec-sch2(1) 维修电路原理图.pdf

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1、A123456789BCDEFGHIJKLRX-777SCHEMATIC DIAGRAM (INPUT)25BUFFERP27A5 MTZJ12CAnodeCathodeNJM2068D-DNJM2068LDLA795611530LC782112SC18151814819ECBBCE2SC1740S2SD1915FDTA144ESDTC114ES2SD2375ECB87654321OUT1Vcc+IN2IN2OUT2+Vcc+IN1IN1IC501, 506: NJM2068LDIC502, 509512: NJM2068D-DDual OP-AmpIC503, 504: LC78211Ana

2、log Function SwitchIC507, 508: LA7956Video Switch123456789101130292827262524232221201916121817141513LEVEL SHIFTERLATCHCONTROLSHIFT REGISTERZZZZZZL1L2L3L4LCOM1L5L6L7L8RESSVDDVSSVEELCOM2LCOM3R1R2R3R4RCOM1RCOM2RCOM3R5R7R8D1CLCER6123456789VIDEOOUTABVIN1GNDVIN2VCCVIN3VIN4DRIVER6dBAMPCONTROL4 INPUT 1 OUTP

3、UTVIDEO SWITCH# All voltage are measured with a 10M/V DC electric volt meter.# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed.# Schematic diagram is subject to change without notice.CD DIRECT AMPBUFFER

4、AMPBUFFER AMPINPUT SELECTORREC OUT SELECTOREQ AMPP26A7P26A7P26E5P26B53812647565872341658732416587324165873241109764321109741185118520232620232663212122242527282930212224272528293065871324-13.03-13.02-13.08-13.0165470013.90000000-13.90-14.7-14.712.9-13.000000012.9-13.900000012.9-13.000000012.9-13.00-

5、14.7-14.714.714.714.700-14.805.314.714.700000000000000000000000000000000000000000000000-14.805.30000000-14.7-14.7000014.3-14.30000000.70.714.80014.800005.200-13.013.000006.26.27.212.115.55.511.56.26.700012.111.66.20.15.33.803.811.63.86.10.15.33.803.811.63.8FR6541P 1001P 10012RadioFans.CN 收音机爱 好者资料库A

6、123456789BCDEFGHIJKLSCHEMATIC DIAGRAM (OPERATION 1/2)26RX-7771SS133HZS4B2TDHZS5A2TDHZS5C2TDHZS6A2TDHZS6B2TDHZS7A2TDMTZJ12CM38B59EFFPSIR-481ST3FNJM2068D-D2SC4488BCE2SD23752SA933S2SC1740S2SD1915FDTA144ESECBAnodeCathode125264041656680ECB148+# All voltage are measured with a 10M/V DC electric volt meter

7、.# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed.# Schematic diagram is subject to change without notice.87654321OUT1Vcc+IN2IN2OUT2+Vcc+IN1IN1IC302: NJM2068D-DDual OP-AmpPoint 1 Pin 15 of IC301Point 2

8、emitter of Q305 and collector of Q307POWER ON(Connect the power cord)POWER OFF(Disconnect the power cord)Q305 EQ307 C87145623REGULATORRESETFL DISPLAYREMOTEAB6.0-14.65.36.05.3-14.60-14.7-14.76.06.06.06.06.06.0000-14.6-14.66.0-14.3-14.40000006.05.12.411.65.718.012.111.612.105.70005.1013.96.05.36.76.05

9、.36.7013.213.9005.10005.15.75.26.05.7-14.65.302.35.32.305.302.500.60.800005.3-14.6-14.65.35.35.35.35.35.32.45.35.35.35.35.35.25.25.25.35.302.32.55.35.35.35.35.302.45.35.30.15.30.15.3-26.7-26.6-26.6-26.605.218.0-26.82.30.805.200005.35.35.05.05.305.30-26.6-26.7-26.6-26.6-20.8-20.8-20.8-20.8-26.8-21.2A

10、21BP25F7P25F8P27E1P26I6P25H4P28C1P26D8FR44112R2162.2M38B57M6-172FPRadioFans.CN 收音机爱 好者资料库A123456789BCDEFGHIJKLRX-777SCHEMATIC DIAGRAM (OPERATON 2/2)27VOLUMEMOTORDRIVEHZS5C2TDNJM2068LD18DTC114ESECBAnodeCathodeLB164111087654321OUT1Vcc+IN2IN2OUT2+Vcc+IN1IN1IC401: NJM2068LDDual OP-AmpIC405: LB1641Motor

11、Driver23P15IN 11GND4VZ6IN 2OUT 18VCC 210OUT 29P2INPUT LOGICPRE DRIVER7VCC 1# All voltage are measured with a 10M/V DC electric volt meter.# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed.# Schematic dia

12、gram is subject to change without notice.SPEAKERSPHONESPURE DIRECT AMP765413288405.200.1013.80.10-13.00014.8000-14.8001.700.50018.618.60.70.50.70.400P28A6P26C8P25F4P28A2A123456789BCDEFGHIJKLSCHEMATIC DIAGRAM (MAIN)28RX-7772SA17082SC4488ECB1SR1391SS1331SS270AMTZJ16AMTZJ27DS5VB202SA16942SC44672SA13582

13、SC34212SC1740S2SD1915FDTA123ESTP2SA893A2SA9702SA10152SA11452SC18152SC1890A2SC2705ECBAnodeCathode+ECBBCEECB# All voltage are measured with a 10M/V DC electric volt meter.# Components having special characteristics are marked s and must be replaced with parts having specifications equal to those origi

14、nally installed.# Schematic diagram is subject to change without notice.MUTINGPOWER AMPPROTECTIONMAIN POWER SUPPLYSUB POWER SUPPLYR2231P 82D2375 (Q/P)00-14.6-14.60014.815.415.400-15.4-15.4-14.815.718.5-6.3-19.518.618.618.5-26.70-27.40.70.70018.50.5-19.5-19.5-0.118.6-19.5-0.118.6018.618.518.6-19.5001

15、5.618.60056.6(45.6)-56.5(-45.5)0AC30.5AC82.4AC4.2V14.09.70.10.1014.06.3014.06.26.306.2AC66.5AC12.6-14.3056.20-14.356.656.40-0.51.1-0.555.4-0.5056.556.50.61.156.00.656.65655.41.1-1.1-1.1-54.9-55.5-1.1-0.5-56.5-56.5-0.6000000-55.50.6-55.5-55.40.6-55.40-55.4-0.556.61.1-1.1-55.5-55.4-56.1-54.9-55.5-56.5-56.5-0.5-56.500.6056.6056.256.60-0.51.10.656.600.60-0.5-1.155.40.6-55.5-55.5-56561.155.455.45656.6-1.1-0.5-56.50-55.5-55.5-56.0-55.4-54.9-55.5-55.4-56.000.6-55.500.6-55.4-55.5-55.45656.5-14.3-14.30P27D1P27G7P26H62.2K2.2KR224