Yamaha Soavo-900SW Service Manual

Also see for Soavo-900SW: Brochure & specs Owner's manual Owner's manual

Contents

A B C D E F G H123456I J K L M N O7891022Soavo-900SW* All voltages are measured with a 10MΩ/V DC electronic voltmeter.* 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.Z-2.4-2.45.15.05.0 5.05.0-1.1-4.9-4.9000002.20013.9 13.913.914.056.658.3101.2101.263.863.863.863.863.863.758.314.850.450.4101.2101.250.450.414.014.0000000014.814.8 14.85.15.1-4.9-4.9 -15.2010.310.310.210.2 10.210.2000000 0-0.1-0.1-0.1 -0.150.450.450.450.4000005.05.05.05.00.70.10.1000000014.0-15.200 0-0.8-0.8 -0.814.0 14.0-0.8000000005.15.04.94.94.95.05.01.31.30.70.75.1-1.114.014.050.450.463.763.763.714.863.856.610.310.310.22.25.22.11.3010.310.310.32.22.11.35.2000000.1-4.9-4.85.15.05.03.51.303DC OFFSET ADJUSTMENTTo MAIN (1) W10Page 21 J-2To MAIN (1) W11Page 21 J-2To MAIN (1) W12Page 21 K-2DIGITALPoint e (Pin 23 of IC101)I C101 : YDA133-EZE2Digital Audio Power AmplifierControllerPLLDIGITALMODULATIONCIRCUITPOWER SUPPLYVOLTAGEDETECTIONCIRCUITMUTEERRORCONTROLCIRCUITGNDCLOCKPARTOperationalampliferfor integration24 XO23 XI22 MCKIO20 MSSEL21 CKOUT19 HIP18 HIN16 PVDD17 PVSS15 MUTEN9 ERRIN10 ICOUTPLLC 2SEL 3AX1 4AINM 5AINP 6VDD 7GND 1VSS 8DETA2 12DETB2 14DETA 11DETB 13–+Digital modulation partI C102, 103 : IRS20954STRPBFPower Drive16 CSH15 VB14 HO13 VS12 NC11 VCC10 LO9 COM7 OCSET6 VREF8 DTVDD 1IN 3VSS 4NC 5CSD 2PROTECTIONCONTROLHVLEVELSHIFTHVLEVELSHIFTSD DTDEAD-TIMEUVDETECT5V REGHVLEVELSHIFTHVLEVELSHIFTHVLEVELSHIFTUVDETECTHIGHSIDECSUV QFLOATING HIGH SIDEFLOATING INPUTUVDETECTINPUTLOGICCHARGE/DISCHARGELOW SIDE CS5.1V REFERENCE20.8V 20.8V10.4VI C109 : NJM2068MD-TE2Dual OP-Amp–+OUT1–IN 1–VCC+VCCOUT 21234 5+IN 1 –IN 2+IN 2– +678SB01-05QAnodeCathode2SK2158-T2B-A IRFB38N20DPBFNJM78L05A-T3 IRS20954STRPBFNJM2068MD-TE2 ISS355RF103L2SMA111MA8051-MYDA133-EZE2 1SR154-400NJM79L05A-T31: IN2: GND3: OUT1: OUT2: IN3: GND8415 AnodeCathode2SA1037K (Q, R, S)2SA1514K (R, S)2SC2412K (Q, R, S)2SD2657KDTA114EKADTA144EKADTC114EKAG D SCEBGDS16 81924 12113Caution: When taking measurement at the following points foroperation check, do not use a voltmeter or the likewhich may cause a failure.Pin 10 of IC102Pin 14 of IC102Pin 10 of IC103Pin 14 of IC103Gate of Q108Gate of Q109Gate of Q110Gate of Q111Base of Q125Emitter of Q125Base of Q126Emitter of Q126Base of Q127Emitter of Q127Base of Q128Emitter of Q128D115—118R166—169