Service Manual
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..., therefore, inevitable and specifications are continually striving to improve YAMAHA products. I CONTENTS TO SERVICE PERSONNEL 2 SPECIFICATIONS 3 INTERNAL VIEW 4 FRONT PANELS 5 REAR PANELS 6-7 DISASSEMBLY PROCEDURES 8-11 BLOCK DIAGRAM 12 PRINTED CIRCUIT BOARDS 13-14 SCHEMATIC DIAGRAMS 15-16 REPLACEMENT PARTS LIST 17-25 101061 2007 All rights reserved. YST-FSW150/ YST-FSW050 SUBWOOFER SYSTEM YST-FSW150/YST-FSW050 SERVICE MANUAL • YST-FSW150 • YST-FSW050 IMPORTANT NOTICE This manual has been provided for the use of the product to...
..., therefore, inevitable and specifications are continually striving to improve YAMAHA products. I CONTENTS TO SERVICE PERSONNEL 2 SPECIFICATIONS 3 INTERNAL VIEW 4 FRONT PANELS 5 REAR PANELS 6-7 DISASSEMBLY PROCEDURES 8-11 BLOCK DIAGRAM 12 PRINTED CIRCUIT BOARDS 13-14 SCHEMATIC DIAGRAMS 15-16 REPLACEMENT PARTS LIST 17-25 101061 2007 All rights reserved. YST-FSW150/ YST-FSW050 SUBWOOFER SYSTEM YST-FSW150/YST-FSW050 SERVICE MANUAL • YST-FSW150 • YST-FSW050 IMPORTANT NOTICE This manual has been provided for the use of the product to...
Service Manual
Page 2
...Information Components having specifications equal to solder/flux vapor! WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE G Leakage current must be replaced with solder or components located inside the enclosure of this product contains LEAD. For U model "CAUTION" "F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A, 125V FUSE... using the lead free solder. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I TO SERVICE PERSONNEL 1. G Meter impedance should be sure to use one of the following types for the repair work....
...Information Components having specifications equal to solder/flux vapor! WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE G Leakage current must be replaced with solder or components located inside the enclosure of this product contains LEAD. For U model "CAUTION" "F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A, 125V FUSE... using the lead free solder. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I TO SERVICE PERSONNEL 1. G Meter impedance should be sure to use one of the following types for the repair work....
Service Manual
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...model L .......... Singapore model J Japanese model Advanced Yamaha Active Servo Tech- I SPECIFICATIONS Type Advanced Yamaha Active Servo Technology II Output Power / ग़ྗ (100 Hz, 5 ohms, 10% T.H.D.) [YST-FSW150 75 W [YST-FSW050 50 W Dynamic Power 5 ohms) [YST-FSW150 130 W [YST-FSW050 100 W Input Sensitivity 50 Hz, 75 W / 5 ohms, INPUT (PJ)) [YST-FSW150 100 mV [YST-FSW050 50 mV Input Impedance INPUT (PJ 12 k-ohms Frequency Response YST-FSW150 30 Hz to 160 Hz [YST-FSW050 35 Hz to let the speaker unit have a perfectly linear motion by the speaker and amplifier...
...model L .......... Singapore model J Japanese model Advanced Yamaha Active Servo Tech- I SPECIFICATIONS Type Advanced Yamaha Active Servo Technology II Output Power / ग़ྗ (100 Hz, 5 ohms, 10% T.H.D.) [YST-FSW150 75 W [YST-FSW050 50 W Dynamic Power 5 ohms) [YST-FSW150 130 W [YST-FSW050 100 W Input Sensitivity 50 Hz, 75 W / 5 ohms, INPUT (PJ)) [YST-FSW150 100 mV [YST-FSW050 50 mV Input Impedance INPUT (PJ 12 k-ohms Frequency Response YST-FSW150 30 Hz to 160 Hz [YST-FSW050 35 Hz to let the speaker unit have a perfectly linear motion by the speaker and amplifier...
Service Manual
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...grille ass'y is used for secure installation. (The bottom grille ass'y will come off . (Fig. 1) Note: • • Removing the bottom grille ass'y with wider blade end) * Used when removing the bottom grille ass'y and front panel ass'y. 44 44 1. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I DISASSEMBLY PROCEDURES Disconnect the power cable...44 44 44 Dowel μϘ Bottom grille ass'y 44: Dowel μϘ Dowel μϘ Flatblade screwdriver Metalblade ϔϥ 8 Fig. 1 As a flatblade screwdriver is fixed to the cabinet ass'y. b.
...grille ass'y is used for secure installation. (The bottom grille ass'y will come off . (Fig. 1) Note: • • Removing the bottom grille ass'y with wider blade end) * Used when removing the bottom grille ass'y and front panel ass'y. 44 44 1. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I DISASSEMBLY PROCEDURES Disconnect the power cable...44 44 44 Dowel μϘ Bottom grille ass'y 44: Dowel μϘ Dowel μϘ Flatblade screwdriver Metalblade ϔϥ 8 Fig. 1 As a flatblade screwdriver is fixed to the cabinet ass'y. b.
Service Manual
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YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 d. Remove 2 screws (2) and then remove 2 legs. (Fig. 3) b. Pull out the bottom panel ass'y. (Fig. 3) d. c. MAIN (2) P.C.B. Removal of the Driver. (Fig. 2) E 1 JHʣ F JHʣ 1 Driver $POOFDUPS ίωΫλʔ Fig. 2 2. Remove CB1-5 and then remove the bottom panel ass'y. (Fig. 3) MAIN (1) P.C.B. Remove 4 screws (1) and then pull out the driver. (Fig. 2) e. Disconnect the connector connected to the terminal of bottom panel ass...
YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 d. Remove 2 screws (2) and then remove 2 legs. (Fig. 3) b. Pull out the bottom panel ass'y. (Fig. 3) d. c. MAIN (2) P.C.B. Removal of the Driver. (Fig. 2) E 1 JHʣ F JHʣ 1 Driver $POOFDUPS ίωΫλʔ Fig. 2 2. Remove CB1-5 and then remove the bottom panel ass'y. (Fig. 3) MAIN (1) P.C.B. Remove 4 screws (1) and then pull out the driver. (Fig. 2) e. Disconnect the connector connected to the terminal of bottom panel ass...
Service Manual
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... Fig. 4 YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 3. First, insert a flatblade screwdriver at 2 dowel positions and push up the front panel ass'y. (Fig. 4) c. Remove 2 bushings. (Fig. 4) * Used bushing, once removed, cannot be reused. As a flatblade screwdriver is fixed to the cabinet ass'y with the flatblade screwdriver only without applying quick-drying bond or the like may cause a damage to use a new bushing...
... Fig. 4 YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 3. First, insert a flatblade screwdriver at 2 dowel positions and push up the front panel ass'y. (Fig. 4) c. Remove 2 bushings. (Fig. 4) * Used bushing, once removed, cannot be reused. As a flatblade screwdriver is fixed to the cabinet ass'y with the flatblade screwdriver only without applying quick-drying bond or the like may cause a damage to use a new bushing...
Service Manual
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...Remove 2 bushings. (Fig. 5) * Used bushing, once removed, cannot be reused. d. bly back to use a new bushing in place of rear panel ass'y a. pose and place the bottom panel ass'y, front panel ass'y and rear panel ass'y on them. (Fig. 6) 1 "44 44 44 JHʣ Rear panel... 4 Rear panel ass'y ϦΞύωϧ"44: Rear cover ϦΞΧόʔ 5 4 Bushing ϒογϡ Fig. 5 When Checking the P.C.B.: • Connect all the connectors removed during disassem- YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 4. Removal of the removed used bushing....
...Remove 2 bushings. (Fig. 5) * Used bushing, once removed, cannot be reused. d. bly back to use a new bushing in place of rear panel ass'y a. pose and place the bottom panel ass'y, front panel ass'y and rear panel ass'y on them. (Fig. 6) 1 "44 44 44 JHʣ Rear panel... 4 Rear panel ass'y ϦΞύωϧ"44: Rear cover ϦΞΧόʔ 5 4 Bushing ϒογϡ Fig. 5 When Checking the P.C.B.: • Connect all the connectors removed during disassem- YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 4. Removal of the removed used bushing....
Service Manual
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YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I BLOCK DIAGRAM YST-FSW150/YST-FSW050 INPUT S1 PJ1 IC1A 6S2 5 + 7 VR1 VOLUME S3 L.P.F. 6dB/oct 3 + IC1B 1 2- IC6A 3+ 1 - L.P.F. 12dB/oct IC6B 5+ 7 - H.P.F. 12dB/oct POWER AMP. +B RY1 S4 3 10 - 12 S0 2 IC3 + 9 -B A.N.IC IC2 DRIVER WOOFER + R59 0.1 SYSTEM CONTROL +10 JK1 DRIVER Q10,11 AC IN LIMITER Q5,6,7,8 RY2 POWER SW1 +B F1 T1 POWER SUPPLY D20 AC5 IC4 REGULATOR IC5 D1 -B POWER INDICATOR PROTECTION Q2,4,9,12 +15 -15 12
YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I BLOCK DIAGRAM YST-FSW150/YST-FSW050 INPUT S1 PJ1 IC1A 6S2 5 + 7 VR1 VOLUME S3 L.P.F. 6dB/oct 3 + IC1B 1 2- IC6A 3+ 1 - L.P.F. 12dB/oct IC6B 5+ 7 - H.P.F. 12dB/oct POWER AMP. +B RY1 S4 3 10 - 12 S0 2 IC3 + 9 -B A.N.IC IC2 DRIVER WOOFER + R59 0.1 SYSTEM CONTROL +10 JK1 DRIVER Q10,11 AC IN LIMITER Q5,6,7,8 RY2 POWER SW1 +B F1 T1 POWER SUPPLY D20 AC5 IC4 REGULATOR IC5 D1 -B POWER INDICATOR PROTECTION Q2,4,9,12 +15 -15 12
Service Manual
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... D19 H3 Q14 I1 D20 F2 CB4 SP- DRIVER SP+ WOOFER C56 G3 B, G models W10B1 W10B2 W10B3 W10B1 W10B2 W10B3 13 Location Ref no . A B 1 I PRINTED CIRCUIT BOARDS MAIN (3) P.C.B. (Side A) VOLUME 2 1 8 S3 3 E S2 +15 -15 LEDG LED IC1 W2 C D E F G YST-FSW150 MAIN (1) P.C.B. (Side A) POWER OFF/SYSTEM ON Power indicator IC3 12 H B, G models 1 W3A WH W3B BE IC2 8 1 W10A3 W10A2 W10A1...
... D19 H3 Q14 I1 D20 F2 CB4 SP- DRIVER SP+ WOOFER C56 G3 B, G models W10B1 W10B2 W10B3 W10B1 W10B2 W10B3 13 Location Ref no . A B 1 I PRINTED CIRCUIT BOARDS MAIN (3) P.C.B. (Side A) VOLUME 2 1 8 S3 3 E S2 +15 -15 LEDG LED IC1 W2 C D E F G YST-FSW150 MAIN (1) P.C.B. (Side A) POWER OFF/SYSTEM ON Power indicator IC3 12 H B, G models 1 W3A WH W3B BE IC2 8 1 W10A3 W10A2 W10A1...
Service Manual
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Location Ref no . DRIVER SP+ WOOFER C56 K, B, G models G3 W10B3 W10B2 W10B1 ... Q14 I1 IC1 C3 CB4 SP- A B C YST-FSW150/YST-FSW050 1 MAIN (3) P.C.B. (Side A) VOLUME 2 1 IC1 W2 8 S3 3 E S2 +15 -15 LEDG LED D E F G YST-FSW050 MAIN (1) P.C.B. (Side A) POWER 12 OFF/SYSTEM ON Power indicator H K, B, G models IC3 1 W3A WH W3B BE IC2 8 1 W10A3...JK1 CB2 S1 +10 E COM IN OUT IC4 IC5 IN COM OUT SYSTEM CONNECTOR INPUT C8 K, B, G models MAIN (6) P.C.B. (Side A) 8 IC6 1 R, L models BR W14A YE W12A CB11 CB12 W11A BE W13A RE 7 14 110-120V 220-240V ...
Location Ref no . DRIVER SP+ WOOFER C56 K, B, G models G3 W10B3 W10B2 W10B1 ... Q14 I1 IC1 C3 CB4 SP- A B C YST-FSW150/YST-FSW050 1 MAIN (3) P.C.B. (Side A) VOLUME 2 1 IC1 W2 8 S3 3 E S2 +15 -15 LEDG LED D E F G YST-FSW050 MAIN (1) P.C.B. (Side A) POWER 12 OFF/SYSTEM ON Power indicator H K, B, G models IC3 1 W3A WH W3B BE IC2 8 1 W10A3...JK1 CB2 S1 +10 E COM IN OUT IC4 IC5 IN COM OUT SYSTEM CONNECTOR INPUT C8 K, B, G models MAIN (6) P.C.B. (Side A) 8 IC6 1 R, L models BR W14A YE W12A CB11 CB12 W11A BE W13A RE 7 14 110-120V 220-240V ...
Service Manual
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... 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 ... must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 15
... 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 ... must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. 15
Service Manual
Page 16
... are marked s and must be replaced with parts having specifications equal to those originally installed. 10 # Schematic diagram is subject to change without notice. 16 MAIN (1) POWER AMP. IC3 MAIN (4) W1 CB1 3....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 5 6 7 8 9 10 11 12 IC4: NJM78M15FA Voltage regulator INPUT OUTPUT IC5: NJM79M15FA Voltage regulator COMMON COMMON OUTPUT INPUT s16 L2 s17 J502 O O PIN CONNECTION DIAGRAM...
... are marked s and must be replaced with parts having specifications equal to those originally installed. 10 # Schematic diagram is subject to change without notice. 16 MAIN (1) POWER AMP. IC3 MAIN (4) W1 CB1 3....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 5 6 7 8 9 10 11 12 IC4: NJM78M15FA Voltage regulator INPUT OUTPUT IC5: NJM79M15FA Voltage regulator COMMON COMMON OUTPUT INPUT s16 L2 s17 J502 O O PIN CONNECTION DIAGRAM...
Service Manual
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... : POTENTIOMETER WITH ROTARY SW VR.SLIDE : SLIDE POTENTIOMETER VR.TRIM : TRIMMER POTENTIOMETER 17 YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I REPLACEMENT PARTS LIST • ELECTRICAL COMPONENT PARTS WARNING G Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. ˔ s ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS: C.A.EL.CHP : CHIP ALUMI.ELECTROLYTIC CAP C.CE : CERAMIC CAP...
... : POTENTIOMETER WITH ROTARY SW VR.SLIDE : SLIDE POTENTIOMETER VR.TRIM : TRIMMER POTENTIOMETER 17 YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I REPLACEMENT PARTS LIST • ELECTRICAL COMPONENT PARTS WARNING G Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. ˔ s ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS: C.A.EL.CHP : CHIP ALUMI.ELECTROLYTIC CAP C.CE : CERAMIC CAP...
Service Manual
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A B C D E YST-FSW150/YST-FSW050 1 • OVERALL ASS'Y YST-FSW150 *1 Used bushing, once removed, cannot be reused. To replace packing B, C and D, use packing A and cut it to use a new bushing in place of packing as re- Packing A: 270 mm x 6 mm (10-5/8" x 1/4") Packing B: 154...removed used bushing 201 204 x 2 4-6 23 4-20 4-11 4-5 Packing C 202 4-20 Packing D 205 2 4-15 203 4-13 8-1 (3) 3-12 203-2 3-1 3 3-4 3-3 3-7 3-8 4-14 *1 3-11 1 8-1 (4) Packing C 23 Packing D 204 203 4 *2 Packing B, C and D are not available as specified below. placement parts...
A B C D E YST-FSW150/YST-FSW050 1 • OVERALL ASS'Y YST-FSW150 *1 Used bushing, once removed, cannot be reused. To replace packing B, C and D, use packing A and cut it to use a new bushing in place of packing as re- Packing A: 270 mm x 6 mm (10-5/8" x 1/4") Packing B: 154...removed used bushing 201 204 x 2 4-6 23 4-20 4-11 4-5 Packing C 202 4-20 Packing D 205 2 4-15 203 4-13 8-1 (3) 3-12 203-2 3-1 3 3-4 3-3 3-7 3-8 4-14 *1 3-11 1 8-1 (4) Packing C 23 Packing D 204 203 4 *2 Packing B, C and D are not available as specified below. placement parts...