Service Manual
Page 1
... and their service personnel. IMPORTANT: Turn the unit OFF during disassembly and part replacement. 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 YAMAHA are continually striving to improve YAMAHA products. WARNING: Failure to follow appropriate service and safety procedures when servicing this manual to...
... and their service personnel. IMPORTANT: Turn the unit OFF during disassembly and part replacement. 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 YAMAHA are continually striving to improve YAMAHA products. WARNING: Failure to follow appropriate service and safety procedures when servicing this manual to...
Service Manual
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... the following types for leakage with parts having special characteristics are marked s and must not exceed 0.5mA. If you come in this product contains LEAD. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I TO SERVICE PERSONNEL 1. For U model "CAUTION" "F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A, 125V FUSE...
... the following types for leakage with parts having special characteristics are marked s and must not exceed 0.5mA. If you come in this product contains LEAD. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I TO SERVICE PERSONNEL 1. For U model "CAUTION" "F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A, 125V FUSE...
Service Manual
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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 product improvements. British...
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 product improvements. British...
Service Manual
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... bottom grille ass'y. (Fig. 1) c. First, insert a flatblade screwdriver at 4 locations. Next, using the metalblade or the like may cause damage to the bottom grille ass'y. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I DISASSEMBLY PROCEDURES Disconnect the power cable from the AC outlet. • Required tools • Flatblade screwdriver • Metalblade or the like (with the flatblade screwdriver...
... bottom grille ass'y. (Fig. 1) c. First, insert a flatblade screwdriver at 4 locations. Next, using the metalblade or the like may cause damage to the bottom grille ass'y. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 I DISASSEMBLY PROCEDURES Disconnect the power cable from the AC outlet. • Required tools • Flatblade screwdriver • Metalblade or the like (with the flatblade screwdriver...
Service Manual
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... out the driver. (Fig. 2) e. Remove 12 screws (3). (Fig. 3) * Screws (3) are identified with arrow marks ( ). Disconnect the connector connected to the terminal of bottom panel ass'y a. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 d.
... out the driver. (Fig. 2) e. Remove 12 screws (3). (Fig. 3) * Screws (3) are identified with arrow marks ( ). Disconnect the connector connected to the terminal of bottom panel ass'y a. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 d.
Service Manual
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... screwdriver only without applying quick-drying bond or the like.) YST-FSW150 Flatblade screwdriver 44 44 44 44 B JH C 44 JHʣ D "44 JH 44 44 44 44 44 Bushing ϒογϡ Dowel μϘ Dowel μϘ Metalblade ϔϥ YST-FSW050 Flatblade screwdriver Front panel ass'y 44: Bushing ϒο... of the removed used for secure installation. (The front panel ass'y will come off . (Fig. 4) Note: • • Removing the front panel ass'y with dowels. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 3.
... screwdriver only without applying quick-drying bond or the like.) YST-FSW150 Flatblade screwdriver 44 44 44 44 B JH C 44 JHʣ D "44 JH 44 44 44 44 44 Bushing ϒογϡ Dowel μϘ Dowel μϘ Metalblade ϔϥ YST-FSW050 Flatblade screwdriver Front panel ass'y 44: Bushing ϒο... of the removed used for secure installation. (The front panel ass'y will come off . (Fig. 4) Note: • • Removing the front panel ass'y with dowels. YST-FSW150/ YST-FSW050 YST-FSW150/YST-FSW050 3.
Service Manual
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...;"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. 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 ass...
...;"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. 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 ass...
Service Manual
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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 IC6A 3+ 1 - 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- 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 IC6A 3+ 1 - 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- L.P.F. 12dB/oct IC6B 5+ 7 -
Service Manual
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...WOOFER C56 G3 B, G models W10B1 W10B2 W10B3 W10B1 W10B2 W10B3 13 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 W9 W8 MAIN (2) P.C.B. (Side A) 4 BE WH... R, L models WH YE RE BR BE BE W11B W7B W12B W13B W14B W6B W6B W7B AC5 -B 15G +B -15 +15 R1B R1A E3 PRT SO E S4 I J YST-FSW150/YST-FSW050 • Semiconductor Location Ref no . Location Ref no .
...WOOFER C56 G3 B, G models W10B1 W10B2 W10B3 W10B1 W10B2 W10B3 13 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 W9 W8 MAIN (2) P.C.B. (Side A) 4 BE WH... R, L models WH YE RE BR BE BE W11B W7B W12B W13B W14B W6B W6B W7B AC5 -B 15G +B -15 +15 R1B R1A E3 PRT SO E S4 I J YST-FSW150/YST-FSW050 • Semiconductor Location Ref no . Location Ref no .
Service Manual
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... D17 B6 Q11 C6 D18 H2 Q12 C7 D19 I3 Q13 H1 D20 F2 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 W10A2 W10A1...
... D17 B6 Q11 C6 D18 H2 Q12 C7 D19 I3 Q13 H1 D20 F2 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 W10A2 W10A1...
Service Manual
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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 ...
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 ...
Service Manual
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... D3SBA20 4A 200V 1 2 34 NJM4558L 1 NJM78M15FA NJM79M15FA STK404-120 8 12 3: IN 3: COM 1: OUT 2: COM 1: OUT 2: IN 1 V723510 JG-11-T FG64410 0.01/50 FG65122 22P O O A B C D E F G H I J K L M N YST-FSW150/YST-FSW050 1 MAIN YST-FSW050 2 INPUT 3 JK1 SYSTEM CONNECTOR 4 L.P.F. +15.0 0 IC1 0 0 5 MAIN (3) 6 (R, L models) MAIN (8) W11B POWER TRANSFORMER W7B W10B1 W12B 7 W13B W10B2 W14B W6B W10B3 W6A 8 W7A MAIN (6) CB12 CB11...
... D3SBA20 4A 200V 1 2 34 NJM4558L 1 NJM78M15FA NJM79M15FA STK404-120 8 12 3: IN 3: COM 1: OUT 2: COM 1: OUT 2: IN 1 V723510 JG-11-T FG64410 0.01/50 FG65122 22P O O A B C D E F G H I J K L M N YST-FSW150/YST-FSW050 1 MAIN YST-FSW050 2 INPUT 3 JK1 SYSTEM CONNECTOR 4 L.P.F. +15.0 0 IC1 0 0 5 MAIN (3) 6 (R, L models) MAIN (8) W11B POWER TRANSFORMER W7B W10B1 W12B 7 W13B W10B2 W14B W6B W10B3 W6A 8 W7A MAIN (6) CB12 CB11...
Service Manual
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...-ENDTUNER PACK VR : ROTARY POTENTIOMETER VR.MTR : POTENTIOMETER WITH MOTOR VR.SW : 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...
...-ENDTUNER PACK VR : ROTARY POTENTIOMETER VR.MTR : POTENTIOMETER WITH MOTOR VR.SW : 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...
Service Manual
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... 2 8-1 (7) 23 8-4 205 9 205 37 23 Packing B 5 R, L models 8-19 *2 8-1 (8) 6 8-1 (6) Packing B 8-11 8-19 *2 8-1 (2) 8-26 23 23 8-37 8-11 9 8-34 36 8-32 8-32 8-31 8-37 7 22 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.
... 2 8-1 (7) 23 8-4 205 9 205 37 23 Packing B 5 R, L models 8-19 *2 8-1 (8) 6 8-1 (6) Packing B 8-11 8-19 *2 8-1 (2) 8-26 23 23 8-37 8-11 9 8-34 36 8-32 8-32 8-31 8-37 7 22 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.
Service Manual
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use pack- 37 ing A and cut it to use a new bushing in place of packing as replacement parts. 35 203 To replace packing C, D and G. A B C D E YST-FSW150/YST-FSW050 1 YST-FSW050 *1 Used bushing, once removed, cannot be reused. Be sure to each length of the removed used bushing 4-11 201 Packing C Packing D 202 2 4-15 4-13 23 4-6 4-...
use pack- 37 ing A and cut it to use a new bushing in place of packing as replacement parts. 35 203 To replace packing C, D and G. A B C D E YST-FSW150/YST-FSW050 1 YST-FSW050 *1 Used bushing, once removed, cannot be reused. Be sure to each length of the removed used bushing 4-11 201 Packing C Packing D 202 2 4-15 4-13 23 4-6 4-...