Yamaha YST-SW005 Service Manual

Also see for YST-SW005: Owner's manual Owner's manual Service manual

Contents

A123456789B C D E F G H I J K LYST-SW005 All voltage are measured with a 10MΩ/V DC electric voltmeter. Components having special characteristics are markeds and must be replaced with parts having specificationsequal to those originally installed. Schematic diagram is subject to change without notice.s8SCHEMATIC DIAGRAMIC9 : NJM78L08AVVoltage RegulatorIC5 : KIA555PProtectIC3 : μPC1237HAProtectIC2 : STK404-050AFAF Power Amp.IC1, 4, 7, 10 : NJM4558DOP Amp.BCE BCEPIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.2SD25312SB1642 2SK3042SC4688 RBV-402 S1NB202SC18152SA10152SC2240E C B–+ ~+~–1N4148MTZ15CMTZJ24BMTZJ12C AnodeCathodeμPC1237HANJM4558DKIA555PNJM78L08ASTK404-050AF18OUTCOM INS G D 110V INV OUTGNDGND 641 2 3TRIGGEROUTRESETREFERENCEVOLTAGETHRESHOLDDISCHARGEVCC7 8+–FLIP-FLOP+–5RRR125 437 86OverloaddetectMid-pointpotentialdetectFlip flopcircuitVcc onmuteAC OFFdetectLatch / automaticreturn selectRelaydrivecircuitGNDVcc1 2 3 4 5 6 7 8 9 10R1 R4R5C1 C2D1TR3TR5R3 R6TR4SUBR2TR1 TR2TR6TR7TR8–+– +OUT1–IN1+IN1–Vcc+VccOUT2–IN2+IN21234876514800000014.3-14.300000 000 00000.50.80000000 0000013.2-13.20013.2-13.2-1.5000.10.10-32.514.31.2-1.2-33.233.20002.900.82.23.53.96.67.95.37.900.10.6033.2AC25.2 14.8-14.8-33.213.413.413.4 7.97.97.93.93.93.9 3.93.93.913.40014.314.3-14.3-14.3AC12.2AC25.2R, T, K modelsPOWER SUPPLYAUTO POWER ON/OFF CIRCUITPROTECTIONJ, U, C, A, B, G modelsWHREBEBE YEYE YERE REWHMAIN (2) MAIN (1)MAIN (3)MAIN (4)MAIN (5)MAIN (6)LIMITTERPOWER AMP.