Yamaha-RXV795A-avr-sch 维修电路原理图.pdf

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1、RX-V795a/RDS/HTR-5170/DSP-R795aABCDEFGHIJKL12345678DSP* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change

2、without notice.I SCHEMATIC DIAGRAM (DSP)E-65/J-55Pointt (Pin13 of IC3)V : 2V/divH : 50 nsec/divDC range1 : 1 probePoint y (Pin13 of IC14)V : 2V/divH : 50 nsec/divDC range1 : 1 probeIC5 : M5M51288BKJ-20LRAMLINE INPUT BUFFERLINE ADDRESSDECODERI/O DATACONTROL CIRCUITDATA I/OADDRESS INPUTA0A1A2A3A4A5A6A

3、7A8S1S2A9A10A11A12A13A14A15A16DQ1DQ2DQ3DQ4DQ5DQ6DQ7DQ818512MEMORY ARRAY131072X8bit512X2048Vcc(5V)GND(0V)COLUMN I/O CIRCUITCOLUMNADDRESS DECODERCOLUMNINPUT BUFFER162562048CHIP SELECTCIRCUITWRITE ENABLECONTROL INPUTOUTPUT ENABLECONTROL INPUTWOEIC2 : HD74HC02FPELQuad 2 Input NOROther ICsG IC3: YM3436DK

4、 See page E-27/J-23G IC4: YSS918-F See page E-28/J-24G IC14: LC87F5164 See page E-31/J-27IC1 : NJM2904MIC811, 13 : PC4570G2Dual OP AmpIC7 : AK43201 bit D/A ConverterIC6 : AK4526A/DREAR LFRONT LDIGITAL INDIGITAL INMAIN LMAIN LCENTER04.9004.94.9004.904.94.904.94.94.94.94.94.963.32.43.12.42.42.602.40.9

5、4.70.103.10000000004.84.9000.500.20.20.504.94.9002.42.44.92.304.90004.902.42.42.44.904.900004.902.304.84.94.82.4004.804.9000000004.84.82.44.82.42.42.4002.42.4002.42.44.80-10.94.704.70.20-10.900-10.900-10.900-10.900-10.900-10.900-10.900-10.900-10.9000.6000.60011.500-11.500011.500011.5000-11.50011.52.

6、42.42.42.42.42.4-11.5-11.52.42.42.42.42.42.411.50-11.50002.402.42.52.42.42.402.42.42.42.42.402.402.4000.54.703.12.42.402.42.402.42.42.42.42.42.42.40.10.10.104.84.800.90.9000.10.10.10.14.82.44.904.94.92.44.92.402.42.4003.10002.403.11.503.102.44.84.72.40.90.1 00.90.9000.1004.94.902.32.64.904.94.94.904

7、.94.904.704.904.900004.94.94.904.90000004.92.42.32.34.92.62.52.42.42.42.44.94.92.22.200005000000000004.94.94.92.20.1DSP+DIGITAL PRO-LOGIC DTS DECODERDIRRAMDACP-E66/J56D-1P-E66/J56G-8P-E69/J59F-253 82416571311141210987231647465711832423568IC3IC4IC14RadioFans.CN 收音机爱好者资料库RX-V795a/RDS/HTR-5170/DSP-R79

8、5aABCDEFGHIJK12345678I SCHEMATIC DIAGRAM (INPUT)E-66/J-56* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to chan

9、ge without notice.INPUT(This waveform is not available by pushing the power switch ON and OFF.)Disconnect the power cordfrom the AC outlet.With the POWER ON, dis-connect the A/C power cord.Reconnect the A/C powercord and the above wave-forms will start.0VPointe (Pin3 of IC21)V : 2V/divH : 50 nsec/di

10、vDC range1 : 1 probePointr CH1 : Pin1 of IC21 CH2 : Pin29 of IC21H : 0.5 sec/divDC range1: 1 probeV : 2V/div (CH1)V : 2V/div (CH2)FRONT LREAR RMAIN LMAIN LCENTER 43400004.911.3-11.511.611.600000-11.511.611.600000-11.54.72.04.84.94.9004.9004.94.904.804.9001.200.300.20.7-11.40011.200000000000000000000

11、00000000011.60000000000000000000000000000000 000000-22.20.10.10.100000.30.3021.800000000021.80000-22.200000-22.20-11.50-11.104.9004.900.304.9004.904.90.14.94.94.901.20.31.404.94.52.24.74.94.94.74.94.900004.94.904.94.904.94.94.9000004.94.9004.94.94.54.94.74.911.611.600000PHONO MM EQ AMPINPUT SELECTOR

12、TAPE MONITORP-E69/J59TO VIDEO(1)C-2P-E67/J67D-8P-E65/J55B-8P-E68/J58H-2P-E71/J61: NOT USED : USED CIRCUIT CHANGES BY MARKET.A-5P-E69/J59A-5P-E69/J59I-3P-E65/J55J-4P-E72/J62 (J,U,C,A,L,R,T models)P-E73 (B,G models)H-5813265475687234117456832236578415321864736547218IC21RadioFans.CN 收音机爱好者资料库RX-V795a/

13、RDS/HTR-5170/DSP-R795aABCDEFGHIJKL12345678INPUT & VIDEOI SCHEMATIC DIAGRAM (INPUT & VIDEO)* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Sch

14、ematic diagram is subject to change without notice.E-67/J-57IC17 : LC78211Analog Function SwitchIC11 : NJM2068MDIC12, 20 : PC4570G2IC13, 15, 16 : M5220FPDual OP AmpIC18 : LC78213Analog Function SwitchIC19 : LC78212Analog Function SwitchIC402404, 407, 408 : LA7956Video SwitchIC401 : TC4053BPTriple 2-

15、Channel Analog Multiplexers/DemultiplexersOther ICsG IC21: HD6433397A97F See page E-36/J-30G IC406: LC74781-9626 See page E-35/J-29IC405 : PD4066BCQuad Analog Switch/Multiplexer16VDDLOGIC LEVEL CONVERTER12OX7VEE6INHOUT C IN13IXOUT C IN2OYOUT C IN1IYOUT C IN5OZOUT C IN3IZOUT C IN4Z-COMMON1514X-COMMON

16、Y-COMMON9C10B11A8VSSREAR LCENTER5.05.75.65.611.10011.1005.000.11.11.80.7008.88.89.39.39.8009.800.50.51.12.72.72.73.40.10.311.11.52.12.52.50.50.505.004.44.91.91.14.34.35.01.10002.5011.13.83.83.85.33.83.83.85.3011.511.311.1011.511.30011.111.33.83.811.13.803.811.511.35.62.405.05.05.005.002.05.01.101.12

17、.500.12.42.44.94.905.011.13.803.811.511.35.711.13.803.811.511.35.71.11.52.21.000.50.55.05.000011.15.65.611.111.505.011.15.7011.15.60.70.70.7023.823.80.70.71.3AC12.6SUB POWER SUPPLYS-VIDEO AMP & SELECTORSUPERIMPOSEREGULATORSYNC SIGNAL DETECTORSPEAKERRELAY DRIVEP-E66/J56D-8P-E69/J59I-2P-E70/J60I-6 TO

18、MAIN (1) TO MAIN (5)P-E68/J58A-1P-E71/J61TO MAIN (2)G-2P-E70/J60TO MAIN (1)I-5CIRCUIT CHANGES BY MARKET.: NOT USED : USED IC406RX-V795a/RDS/HTR-5170/DSP-R795aABCDEFGHIJK12345678I SCHEMATIC DIAGRAM (OPERATION)* All voltage are measured with a 10M/DC electric volt meter.* Components having special cha

19、racteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.E-68/J-58OPERATIONIC102 : LC75710NEFL Display DriverOther ICG IC102 : LC75712E See page E-35-27.9-27.9-27.9-27.9-27.9-27.9-29.6002.

20、32.44.74.904.9004.94.9-27.9-27.9-27.9-27.9-27.9-27.9-27.9-28.0-27.8-27.8-29.6-22.5-28.84.7-28.14.7-27.8-28.14.74.7-27.80-23.6-28.9-28.9-13.3-13.305.65.68.84.94.95.60.60.604.44.9-11.48.88.15.76.34.8000008.84.94.94.9-22.3-22.3-23.6-28.8-28.1-28.0-28.0-27.9-27.9-27.9-27.9-27.9-27.9-27.9-27.9-27.9-27.9-

21、27.9-27.9-27.9FULL MUTE DRIVEDISPLAY DRIVESYSTEM CONTROLRESETCIRCUIT CHANGES BY MARKET.P-E66/J56H-8P-E67/J57I-6P-E70/J60I-4: NOT USEDRX-V795a/RDS/HTR-5170/DSP-R795aABCDEFGHIJKL12345678* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked

22、Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.E-69/J-59I SCHEMATIC DIAGRAM (OPERATION)OPERATIONIC202 : PC4570HADual OP-AmpIC251253, 257, 258 : PC4570G2Dual OP-AmpIC201 : NJM2068LDDual OP AmpIN12+IN13VC

23、C4+IN25IN26OUT27+VCC8OUT11+VO12Vm13+Vm14VEE5+Vm26Vm27VO28VCC9VCC11 + +2IC254 : LB1641Motor DriverIC255, 256 : TC9299PElectric Controlled VolumeIC351 : TC74HCU04APHex InvertersIC352 : HD74HC00PQuadruple 2-input Positive NAND GatesIC353 : HD74HC153PDual 4 to 1 Data SelectorsREAR LMAINDIGITAL INCENTER0

24、.30004.804.34.804.34.8011.300000-11.311.300011.3000-11.300011.311.5000-11.400011.5000000-11.4000-11.3000-11.311.3000000-11.300004.8004.34.80000.34.84.804.84.804.30004.83.12.54.84.84.80000004.94.34.34.804.800000000-11.3000000011.3000000011.30011.3000011.300.12.00.104.80.50.71.204.54.510.410.40.70.5SP

25、EAKER SETTING CONTROLSPEAKER LEVEL CONTROLMOTOR DRIVEVOLUME AMPDIGITAL SELECTORCIRCUIT CHANGES BY MARKET.P-E66/J56E-1P-E67/J57to VIDEO (1)G-8P-E65/J55B-1P-E70/J60A-5P-E71/J61A-4P-E66/J56G-1P-E66/J56C-8: NOT USED3281654718365476547218326475623812381475RX-V795a/RDS/HTR-5170/DSP-R795aABCDEFGHIJK1234567

26、8* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.E-70/J-60I SCHEMATIC DIAGRAM (MAIN)Eac

27、h voltage given here represents that in the top side of IMPEDANCE SELECTOR, butthe one in the parentheses ( ) is that in the bottom side.MAINMAIN LCENTER-48.9(-40.5)48.8(40.5)01.20.70.600.724.10-42.2-29.6-30.200-48.10.6-0.4-1.00.90.40.948.8(40.5)00.448.8(40.5)0-0.4-48.9 (-40.5)-0.4-1.0-48.9 (-40.5)0

28、48.648.8(40.5)0048.6-48.1-48.6-1.013.60-48.800-48.00.6-0.4-1.01.00.41.048.8 (40.5)00.448.8(40.5)-0.5-1.0-48.9 (-40.5)0-0.5-48.9 (-40.5)0048.4-48.0-48.5-1.0-48.800-11.400-11.400-11.400-11.40-48.10.6-0.4-1.01.00.41.048.8 (40.5)00.448.8(40.5)-0.5-1.0-48.9 (-40.5)0-0.5-48.9 (-40.5)0048.5-48.1-48.6-1.0-4

29、8.8000-11.4SPEAKER RELAY DRIVECENTER POWER AMPMAIN R POWER AMPMAIN L POWER AMPMUTINGMUTINGMUTINGBPOWER SUPPLYCIRCUIT CHANGES BY MARKET.P-E71/J61G-5P-E71/J61G-5P-E67/J57TO VIDEO (2)I-5P-E71/J61G-5P-E68/J58B-1P-E69/J59E-5P-E67/J57H-7: NOT USEDRX-V795a/RDS/HTR-5170/DSP-R795aABCDEFGHIJKL12345678MAIN* Al

30、l voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.E-71/J-61I SCHEMATIC DIAGRAM (MAIN)Each vol

31、tage given here represents that in the top side of IMPEDANCE SELECTOR, butthe one in the parentheses ( ) is that in the bottom side.REAR LREAR LMAINCENTER-32.631.8-19.919.0010.500-48.40.60.4-1.00.90.40.948.8 (40.5)00.448.8 (40.5)-0.5-1.0-48.9 (-40.5)000-0.5-48.9 (-40.5)0048.4-48.4-48.9-1.0-49.100-11

32、.40-48.40.6-48.4-1.0-48.8-0.4-1.0-48.9 (-40.5)0.40.948.8 (40.5)00048.40.448.8 (40.5)31.924.024.6-24.9-16.5-8.2005.00.5012.119.0012.019.00-11.7-19.916.48.2024.424.40024.00024.024.0000-0.4-48.9 (-40.5)-1.00.9-0.4-49.1000-11.4-11.400AC75.8AC51.6AC62.6AC31.6AC9.7AC6.5REAR L POWER AMPREAR RPOWER AMPREGUL

33、ATORMUTINGMUTINGMUTINGCIRCUIT CHANGES BY MARKET.P-E71/J61G-6P-E71/J61G-7P-E70/J60I-4P-E66/J56H-1P-E69/J59E-6P-E70/J60I-4P-E67/J57H-5P-E70/J60I-7: NOT USEDRX-V795a/HTR-5170/DSP-R795aABCDEFGHIJK12345678I SCHEMATIC DIAGRAM (TUNER)E-72/J-62Each voltage given here represents that in the FM (98. 1MHz, STE

34、REO) reception modebut the one in the parentheses ( ) is that in the AM (1080kHz, MANL) reception mode.* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zandmust be replaced with parts having specifications equal to thoseoriginally in

35、stalled.* Schematic diagram is subject to change without notice.TUNERGPK1 : ENV-172C8G1R (V2909100) U, C, R, T modelsGPK1 : ENV-172A4G1 (V2716700) A, L modelsGPK1 : ENV-142C2G1R (V2909000) J modelIC1 : LA1266AM/FM IFIC2 : LC72131PLL ControllerIC3 : LA3401MPXV : 2V/divH : 0.1sec/div2VSAMPLE 0.1usPoin

36、t1 (Pin22 of IC2)DC range1 : 1 probe0VFMFMAMAM10.4(0)10.5(11.5)0.1(10.6)5.1(5.0)(4.4)(0)5.1(5.2)7.7 (7.6)2.4(1.1)2.4(1.1)2.4 (1.1)0 (0)11.0 (11.1)11.0 (11.1)11.0 (11.1)0 (0)3.9(3.7)2.3(2.2)0 (2.1)3.0 (2.8)3.4(2.1)3.9(3.5)3.9(3.5)(1.9)(3.5)5.011.4(11.5)5.7(5.7)5.7(5.7)0(0)2.4(0)4.9(5.0)0(2.5)(0)2.44.

37、9(5.0)(1.0) 1.0(1.0) 1.0(5.0)4.5(0)0(0)00.1 10.6(0)0(0)0(0.2)11.4(0)0(0)0(0)0(0)0(2.5)(2.5)2.40(11.5)(11.5)11.411.4(0.2)(1.5)3.90(10.5)1.52.4(1.1)(2.8)0(2.2) 2.6(2.0) 1.51.511.02.4(11.1)3.0(2.8)(2.1)3.1(3.1)3.1(3.1)3.1(3.1)3.1(3.1)3.0(3.0)3.1(3.1)3.1(3.1)3.0(3.0)3.1(3.1)0(6.9)11.1 (11.2)3.4(3.6)2.8(

38、7.0)2.8(5.2)2.8(5.2)2.8 (9.1)2.8 (2.8)0(0)4.9(0)4.9(5.0)0(0)02.8(9.1)0 (0)2.8(9.1)4.9(4.9)0(0)0 (0)4.4(5.2)12.5MONAURAL DISTORTION ADJ.SIGNAL METER ADJ.DISCRIMINATOR BALANCE ADJ.SEPARATION ADJ.(9.4)9.30(0)AM SENSITIVITY87.5MHz98.0MHz108.0MHz1.9V4.5V7.8V531KHz1080KHz1611KHz1.3V5.0V7.3VAMFMVT(EX only)

39、FM(J only)AM7.3V5.0V1.3V1611KHz1080KHz531KHz8.1V4.1V1.6V90.0MHz83.0MHz76.0MHzREGULATORPLLMPXAM/FM IFCIRCUIT CHANGES BY MARKET.bottom viewTO INPUT (1)E-8P-E66/J56: NOT USED : USED RX-V795aRDSABCDEFGHIJKL12345678TUNERE-73I SCHEMATIC DIAGRAM (TUNER)Each voltage given here represents that in the FM (98.

40、 1MHz, STEREO) reception modebut the one in the parentheses ( ) is that in the AM (1080kHz, MANL) reception mode.IC4 : LC72720NRDS Decoder & ControllerGPK1 : ENV-172A4G1 (V2716700)* All voltage are measured with a 10M/DC electric volt meter.* Components having special characteristics are marked Zand

41、must be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.IC1 : LA1266AM/FM IFIC2 : LC72131PLL ControllerIC3 : LA3401MPXSAMPLE 50us2V2VV : 2V/divH : 50nsec/divPoint1 (Pin22 of IC2)DC range1 : 1 probe0VSAMPLE 0.1us2VV

42、: 2V/divH : 0.1sec/divPoint2 (Pin12 of IC4)DC range1 : 1 probe0VAMFMAMFM(0)01.5(2.0) 1.52.7(2.3)0(2.9)(1.1) 2.41.5(1.9)(10.6) 0(3.5) 3.9(3.5) 3.9(2.2) 3.111.2SIGNAL METER ADJ.(6.9)03.1(3.1)5.1(5.1)3.1(3.1)3.1(3.1)5.1(5.1)3.1(3.1)3.2(3.2)3.1(3.1)3.1(3.1)00.5(4.5)(0)(0)4.9(0)0(2.8)2.8(9.2)2.8(5.5)2.8(

43、5.5)2.8(7.3)2.8(2.0)(11.3)3.4(1.5)(9.2)2.8(0)0(2.1)2.5(2.8)3.1(11.2)11.02.63.1 (2.8)(2.2)(2.3)2.3(3.7)3.8(9.2)2.8(0)0(11.2)(0)0(11.2)11.0(11.2)11.1(11.2)2.411.1(0)02.4 (1.1)(1.1)2.4(1.1)2.4 (2.4)2.5(2.5)(0)0(0)0(0)0(0)0(0)0(0.2)11.5(0)0(10.6)0.1(0)04.1(5.1)(1.0)1.1(1.0)1.1(4.9) 4.92.4(0)(2.4) 0(4.5)

44、 0.5(2.4)0(0)5.6(5.6)5.6(11.6)11.5(4.9)4.9(2.5)2.5(0)0(0)0(2.1)(2.1)2.12.1(0)04.2(4.2)(2.1)2.1(2.1)2.1(2.4)2.4(4.9)4.9(0)0(4.9)4.9(0)0(0)0(0)0(0)02SEPARATION ADJ.(4.9)4.9(0)0(0)0AM SENSITIVITY ADJ.(4.3)4.35.1(5.1)(7.5)7.6(9.4)9.4(5.1)5.0(10.6)0.1(11.6)10.4(0)10.3DISCRIMINATOR BALANCE ADJ.MONAURAL DISTORTION ADJ. FMVTAM7.4V5.1V1.4V1611KHz1080KHz531KHz8.3V4.1V1.7V108.0MHz98.1MHz87.5MHz11.5(0.2)11.5(11.6)(9.4)01(0)0(4.9)4.9(5.6)0REGULATORRDS DECODERAM/FM IFMPXPLLTO INPUT (1)E-8P-E66/J56bottom view