Yamaha AV-S70 Service Manual

Also see for AV-S70: Owner's manual Service manual

Contents

A B C D E F G H123456I J K L78AV-S70/NX-SW70AC3DavDIRDAC/ADCRAMPLL CONTMAIN LMAIN LREAR L000 000000000 0 000 4.70.1 0000000022.922.9–22.7–22.70000–0.1–0.1000000 –0.1–0.14.72.10.1 0.14.700.10.3000000.32.42.92.94.74.74.74.74.74.7–0.122.92.32.32.32.32.3 2.322.92.32.3 2.32.32.31.3 4.74.72.32.302.302.302.304.72.322.9–22.72.32.32.3–22.74.3 4.74.3 4.72.32.32.32.32.32.32.32.32.22.200004.64.61.41.42.32.32.14.7~2.32.32.32.32.32.33.21.70000002.32.32.34.62.3 2.32.32.32.32.30~~0003.304.7000004.84.62.32.32.32.304.72.32.32.32.301.42.32.32.32.32.32.304.40000002.10~~0000004.62.24.8004.84.82.34.82.32.32.303.22.32.30002.32.32.33.204.604.604.602.32.31.402.22.2~4.603.20000000000000002.32.14.74.6004.74.74.704.800004.72.32.32.22.32.30 000 4.74.7qLFEC821 560pC826560pDIGITAL 2DIGITAL 1C822560pC823560pC824560pC825560pPoint q (Pin 13 of IC3)V : 2V/div, H : 0.1 μsec/divDC, 1 : 1 probe0V AV-S70 SCHEMATIC DIAGRAM (2/4)IC1 : NJM2904MIC8~12 : M5220FPDual OP Amp–+OUT1–IN1–VCC+VCCOUT21234 5+IN 1 –IN2+IN 2– +678IC801 : TC74HCUO4AFHex Inverters1A1Y2YVDD6A1234 112A 6Y5A1213143A3Y5Y4A567VSS 4Y8910IC2 : HD74HC02FPELQuad 2 Input NOR1 2 3 4 5 6 7Y1A1B1Y2A2B2GND14 13 12 11 10 9 8VCCY4B4A4Y3B3A3IC802 : TC74HC153AFDual 4 to 1 Data Selectors15STROBE2G2BSELECT14ASELECT13 12 11 10 9OUTPUT2Y1STROBE1G3 4 5 6 7OUTPUT1Y16VCC8GNDDATA INPUTSDATA INPUTS2C3 2C2 2C1B A2C0 2Y2GB A1C3 1C2 1C1 1C0 1Y1G B AB ASELECTINPUTSBXLLHHAXLHLHSTROBEGHLLLLOUTPUTYLC0C1C2C3IC7 : LP61256GS-832K X 8 bits High Speed Static RAMIC6 : CS4227-KPAD Converter/DA Converter* All voltage are measured with a 10MΩ/V DC electric volt meter.* Components having special characteristics are marked Z andmust be replaced with parts having specifications equal to thoseoriginally installed.* Schematic diagram is subject to change without notice.A14A12A7A6A5A4A3A2A1A0I/O1I/O2I/O3GND1234567891011121314VCCWEA13A8A9A11OEA10CEI/O8I/O7I/O6I/O5I/O42827262524232221201918171615ROMDECODERINPUTDATACIRCUIT256 x 1024MEMORY ARRAYCOLUMN I/OCONTROLCIRCUITCOLUMN DECODERVCCA0A5A7A9A12I/O1I/O8A1 A14GNDCEOEWEVOLUMECONTROLVOLTAGEREFERENCEVOLUMECONTROLVOLUMECONTROLVOLUMECONTROLVOLUMECONTROLVOLUMECONTROLDEMMONOADCLEFTADCRIGHTADCINPUTGAINANALOG LOW PASS AND OUTPUT STAGEDAC#1DAC#2DAC#3MUXDAC#4DAC#5DAC#6INPUT AUXDIGITAL FILTERSSERIAL AUDIO DATA INTERFACEDIGITAL FILTERSCONTROL PORTAUXILIARY INPUTCLOCK OSC/DIVIDER38373834333236353027183120 28 29 2 1 44 43 41 394 5 6 7 40 19162122232425261514131211109CMOUTAOUT1AOUT2AOUT3AOUT4AOUT5AOUT6AINAUXAIN1LAIN1RAIN2RAIN2LAIN3LAIN3RAGND2CLKOUTXTIXTOHOLDDATAUXLRCKAUXSCLKAUXDGND1DGND2PDNLRCKSCLKSDIN1SDIN2SDIN3SDOUT1SDOUT2OVLDEMAGND1SCL/CCLKSDA/CDOUTAD1/CDINAD0/CSSPI/I2CVD+VA+1098765432111242526272829303132332312 13 14 15 16 17 18 19 20 21 2244 43 42 41 40 39 38 37 36 35 34SDIN2SDIN3CLKOUTOVLXTOXTIDEMAOUT6AOUT5AOUT4AOUT3DATAUXHOLDSCL/CCLKSDA/CDOUTAD1/CDINAD0/CSSPI/I2CPDNAIN3RAIN3LAIN2LAIN2RAIN1RAIN1LAINAUXCMOUTNCAGND1VA+AGND2AOUT1AOUT2LRCKAUXSCLKAUXNCDGND1VD+DGND2SCLKLRCKSDOUT1SDOUT2SDIN1μPC29M33T M5220FPNJM2904M1SS355 YSS908-FCS4227-KQYM3436LP61256GS-8HD74HC02FPEL281514114 71851503181801003018415AnodeCathodeCEB2SC3326 (B)DTA143EKA22121112333344431 241: INPUT2: GND3: OUTPUT4: GNDPIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.37P-38D-6P-38F-6P-36D-1w w w . x i a o y u 1 6 3 . c o mQ Q 3 7 6 3 1 5 1 5 0 992894298T E L 1 3 9 4 2 2 9 6 5 1 3 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299http://www.xiaoyu163.comhttp://www.xiaoyu163.com