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 N7891021Soavo-900SW SCHEMATIC DIAGRAMSMAIN*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.Z00 00000000000000000000 00000000000000000 00.4 0.40.60.60.60.80.40.10.114.814.800.60.60.60.80.40.10.114.814.800 08.38.38.38.38.38.38.37.77.6000000000004.94.86.52.0 2.02.0 0.62.0 0.62.0 0.20.80.86.5 4.96.5 4.96.5 4.90.20.20.71.80.24.84.84.94.94.94.94.602.22.50000.14.84.84.94.94.60 000.10.60.65.50.7 00 0000000000.60.20.28.80.75.5AC12.35.58.85.511.30.41.41.4 1.41.40.80.80.80.20.212.0 14.821.1-22.1 0.1-22.6-14.93.0-3.514.85.54.80.91.01.48.38.34.54.50000001.41.91.90.80.8 0.21.814.90.60.67.60.1-8.2-8.2-8.20000000000014.814.814.814.8-14.9-14.9-14.9-14.8-14.8AC34.9AC73.60.10.10.1-0.5-1.1-1.1-1.7-1.749.149.149.649.6000000-5.1-14.9-14.9-14.9-5.10.10.10.10.10.10.10.10.10.10.10.10.1 0.10.1-3.4-3.4000000042.749.2101.2-22.621.321.114.814.814.814.814.8-15.2 -22.61 2 CH2 2 CH1680820820680C5099 [Q/P/Y]5 k-ohms10WTo DIGITAL CB105Page 22 K-4To DIGITAL CB106Page 22 K-7To DIGITAL CB101Page 22 A-5INPUT 3(NORMAL)L/MONORINPUT 2(LFE)LRINPUT 1/OUTPUTLRH-CUT4.7KVOLUMESTANDBY/ONs36 C43, 44 0.01/250 4700P/250 4700P/250 4700P/250 4700P/250 4700P/250s36 s36POWERON/OFFL2B-1047/50DRIVERWOOFER+–J, U, C, T, K, A, B, G modelsR, L modelsVOLTAGESELECTOR(R, L models)POWERTRANSFORMERPoint wCH 1 : Out of IC11CH 2 : Pin 11 of IC7↑AC POWER ON(Connect the power cable)↑AC POWER OFF(Disconnect the power cable)↑AC POWER ON(Connect the power cable)Point q (Pin 8 of IC7)I C1, 2 : NJM4558LDual OP-Amp–IN 12+IN13–VCC4+IN25–IN 26OUT27+VCC8OUT 11–+–+I C3–5, 12–14 : μPC4570HA-ADual OP-AmpV O12–Vm 13+Vm 14V EE5+Vm 26–Vm 27V O28V CC9V CC11– +– +2I C6, 8 : LB1641Motor Driver23 P15IN 11GND4 VZ6 IN 2OUT 18 VCC 210 OUT 29 P2INPUT LOGICPRE DRIVER7 VCC 1I C9, 10 : TC4052BPDual 4 Channel Analog Multiplexers/Demultiplexers16VDD6INHIBIT10A9B8VSS7VEE12X014X115X211X31Y05Y12Y24Y3LEVELCONVERTERBINARY TO 1-OF-4DECODER WITH INHIBITSWSWSWSWSWSWSWSW13 X3 YINHIBIT00001B0011XA0101X0x, 0y1x, 1y2x, 2y3x, 3yNONE1SR1391SS133MTZJ5.1CMTZJ8.2CMTZJ12CAnodeCathodeS1NB20RBV2506+–2SA970 (GR, BL)2SC2240 (GR, BL)2SC2878 (A, B)2SC4688 (R, O)DTC114ESB C ENJM78L05A-T3 NJM4558LNJM79M15FA TC4052BPμPC4570HA-A LB1641NJM78M15FA LC651152N-4N21-E1911530181: OUT2: IN3: COM1: OUT2: COM3: IN1: IN2: GND3: OUT1101816+ – BC EBCESafety Measures• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, suchas wearing insulating gloves.• C77 and C80 on the MAIN (1) P.C.B. are dangerous, for a high voltage is retained there even after the power is turned off.Before the repair work, connect about 5k-ohm/10W resistor between terminals of the capacitor to forced discharging.After the repair work, also perform forced discharging by connecting about 5k-ohm/10W resistor between terminals of the capacitor.