Yamaha FSW150 Service Manual - Page 15

A B C D E F G H I J K L M N SCHEMATIC DIAGRAMS YST-FSW150 MAIN 1 YST-FSW150/YST-FSW050 MAIN (1) POWER AMP. IC3 0 0.2 0.2 -42.1 +14.8 +1.8 +1.2 -1.1 -42.6 +42.4 0 0 OUT1 +IN1 -IN1 -Vcc +IN2 -IN2 OUT2 +Vcc 2 +42.4 +42.4 +42.4 -11.2 0 0 3 INPUT JK1 SYSTEM CONNECTOR 4 L.P.F. +14.8 0 IC1 0 0 -4.9 -6.8 5 MAIN (3) 6 (R, L models) MAIN (8) W11B POWER TRANSFORMER W7B W10B1 W12B 7 W13B W10B2 W14B MAIN (4) W1 CB1 4.7K 4.7K L.P.F. +14.8 0 IC6 0 0 MAIN (2) -15.2 IC2 0 A.N.IC +14.8 0 0 IC2 -15.2 0 IC1 0 0 W2 CB2 s17 s16 CB3 W3A W3B (U, C, T, A, B, G, J models) MAIN (7) POWER TRANSFORMER W7B W10B1 W10B2 H.P.F. 0 IC6 0 0 -15.2 LIMITER +14.8 0 0 0 00 0 0 00 0 0 0 -15.2 REGULATOR -12.6 0 +14.8 IC4 +31.2 0 -15.2 -36.8 0 -31.5 IC5 0 0 00 +31.2 +36.8 +42.4 -31.5 -37.1 -42.6 CB8 W8 +24.6 0 W9 CB9 POWER W10A1 -42.6 +42.4 SUPPLY W10A2 W10A3 PROTECTION +1.4 -11.2 0 +1.4 0 0 +1.4 +0.9 +1.4 +0.2 +0.8 0 +0.8 0 AC 62.4V CB4 - + DRIVER WOOFER IC1, 2, 6: NJM4558L Dual operational amplifier 1 23456 78 IC3: STK404-120 Power amplifier TR7 R1 TR1 TR2 R2 TR6 R4 R5 TR8 C2 C1 TR5 TR3 TR4 D1 R3 R6 PT1 SUB 1 2 3 4 56 7 8 9 10 11 12 IC4: NJM78M15FA Voltage regulator INPUT OUTPUT IC5: NJM79M15FA Voltage regulator COMMON COMMON OUTPUT W6B W10B3 W6B W10B3 DRIVER INPUT W6A 8 W7A MAIN (6) W6A CB6 CB7 W7A CB5 0 -0.5 -0.2 +14.8 +14.2 +14.2 0 0 W13A W11A 9 W14A W12A VOLTAGE SELECTOR CB11 CB12 AC IN s16 L2 V723510 JG-11-T FG64410 0.01/50 FG65122 22P O s17 J502 O O O PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. 10 2SA970 2SA1015-Y 2SC1815 2SC2240 1SR139 1SS133 D3SBA20 4A 200V NJM4558L NJM78M15FA NJM79M15FA STK404-120 2SC2878 1SR400 1SS176 E CB 1: Emitter 1 2: Collector 2 3 3: Base ECB ECB Anode MTZJ5.6B MTZJ12C MTZJ24B Anode Cathode Cathode 1 2 34 8 1 3: IN 1: OUT 2: COM 3: COM 1: OUT 2: IN 12 1 # All voltages are measured with a 10MΩ/V DC electronic voltmeter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 15