background image

CONTENTS

TO SERVICE PERSONNEL .......................................... 2
SPECIFICATIONS / 

参考仕様

........................................ 3

INTERNAL VIEW ........................................................... 4
REAR PANELS .......................................................... 4~5
DISASSEMBLY PROCEDURES

 / 分解手順

............. 6~7

ADJUSTMENTS / 

調整 ..............................................

8~9

BLOCK DIAGRAM ....................................................... 10
PRINTED CIRCUIT BOARD .................................. 11~12
SCHEMATIC DIAGRAM .............................................. 13
PARTS LIST ........................................................... 15~23

YST-SW225

TOP VIEW

FRONT VIEW

IMPORTANT NOTICE

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users,
and have therefore not been restated.

WARNING:

Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive
components, and failure of the product to perform as specified.  For these reasons, we advise all YAMAHA product owners that any service required
should be performed by an authorized YAMAHA Retailer or the appointed service representative.

IMPORTANT:

The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicable
technical capabilities, or establish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover.  The research, engineering, and service departments of YAMAHA are
continually striving to improve YAMAHA products.  Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to
retrofit.  Should any discrepancy appear to exist, please contact the distributor's Service Division.

WARNING:

Static discharges can destroy expensive components.  Discharge any static electricity your body may have accumulated by grounding yourself to the
ground buss in the unit (heavy gauge black wires connect to this buss).

IMPORTANT:

Turn the unit OFF during disassembly and part replacement.  Recheck all work before you apply power to the unit.

 '04.07

1 0 0 8 9 5

P.O.Box 1, Hamamatsu, Japan

SERVICE  MANUAL

SUBWOOFER SYSTEM

YST-SW225

Summary of Contents for YST-SW225

Page 1: ...he appointed service representative IMPORTANT The presentation or sale of this manual to any individual or firm does not constitute authorization certification or recognition of any applicable technical capabilities or establish a principle agent relationship of any form The data provided is believed to be accurate and applicable to the unit s indicated on the cover The research engineering and se...

Page 2: ...CTRICAL ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA SON WHATSOEVER Avoid prolonged unprotected contact between solder and your skin When soldering do not inhale solder fumes or expose eyes to solder flux vapor If you come in contact with solder or components located inside the enclosure of this product wash your hands before handling food この製品に使用されているすべての基板のハンダ付けに は Sn Ag Cu 錫 銀 銅 の...

Page 3: ...力 U C R T K A B G L models 65 W J model 50 W Standby Power Consumption 待機時消費電力 0 5 W Dimensions 外形寸法 W x H x D 290 x 350 x 349 mm 11 7 16 x 13 3 4 x 13 3 4 Weight 質量 11 5 kg 25 lbs 6 oz Finish Cherry Color C R T K G L J models White Color R T K A B G L J models Silver Color U C T A B G L models Black Color U C T A models Accessories 付属品 Subwoofer Cable 5 m x 1 J model Speaker cable 4 m x 2 J model...

Page 4: ...25 REAR PANELS R model U C models 1 2 3 45 6 7 8 9 1 MAIN 8 P C B 2 Driver 3 MAIN 10 P C B 4 MAIN 1 P C B 5 MAIN 2 P C B 6 MAIN 3 P C B 7 MAIN 4 P C B 8 Power Transformer 9 MAIN 5 P C B Front Side Right Side INTERNAL VIEW ...

Page 5: ...YST SW225 5 YST SW225 T model B G models J model L model K model A model ...

Page 6: ...the MAIN 8 P C B Fig 2 d Remove 5 screws 4 Fig 2 e Remove the Control Unit from the Rear panel Fig 2 f Disconnect the connector CB3 connected to the MAIN 3 P C B Fig 2 g Remove 2 screws 5 Fig 2 Screws 5 are identified with arrow marks h Remove the Rear Cover Fig 2 DISASSEMBLY PROCEDURES 分解手順 番号順に部品を取り外してください AC電源コンセントから 電源コードを抜いてください 1 スピーカーユニットの外し方 a のネジ4本を外し ベースを取り外します Fig 1 b のネジ4本を外し スピーカーユニット...

Page 7: ... 3 When Checking the P C B Rear Panel Ass y and Control Unit are assembled Connect all the connectors removed during disassembly back to the original positions Spread cloth first and place the rear panel ass y on it Fig 3 P C B チェックをする場合には リアパネルAss yとコントロールユニットを組み立 てます 分解の際に外したコネクターをすべて元通りに接続 します ゴムシートと布を敷き その上にリアパネルAss y を置いてチェックします Fig 3 Fig 2 ...

Page 8: ...nconnected Setting 1 Set the signal generator to the sine wave 100 Hz and minimum output level settings 2 Set the volume of the unit to the minimum position 3 Turn on the power to the unit 4 Adjust the output level of the signal generator and the volume of the unit so that the output level observed at oscilloscope CH2 is 28 Vp p Waveform observation With the settings made as described above observ...

Page 9: ...The display LED lights up green and its color changes to red after 4 to 5 seconds 3 Turn off the STANDBY ON switch The display LED goes off 4 Set the AUTO STANDBY switch to the HIGH position 5 Turn on the STANDBY ON switch The display LED lights up green and its color remains unchanged even after time have elapsed 6 Turn off the STANDBY ON switch The display LED goes off After confirmation 1 Turn ...

Page 10: ...2 PROTECTION H L OFF OFF L H R72 C39 TIMER IC7 MUSIC SENSOR IC6 8 4 6 3 7 Q9 REGULATOR IC8 Q3 L R INPUT 1 L R INPUT 2 L R OUTPUT IC2A 3 2 7 4 SW1 PHASE SELECT PRE DRIVE Q13 17 Q20 21 POWER DRIVE Q25 26 LIMITER RY1 IC8 IC5 Q5 8 0 1 Q24C 32 PS AMP Q24A 33 PS AMP B B H P F 12dB oct 15 B 15 B REGULATOR POWER SUPPLY D21 Q18 Q19 F1 POWER SW5 STANDBY ON SW4 R L models only REGULATOR Q1 2 D4 SUB POWER SUP...

Page 11: ...NPUT 1 INPUT 2 PHASE NORM REV MAIN 2 G AC B SG B MAIN 10 B1 DR TR B DR OUT B1 AYST 15 E POW MAIN 10 Ref no Location D2 B2 D3 B2 D6 C4 D7 B4 D9 B4 D10 B4 D12 B4 D13 B4 D15 B5 D16 C5 D17 C5 D19 B7 D20 B7 D36 C7 D37 C7 IC1 G6 IC2 I6 IC3 I3 Semiconductor Location Ref no Location IC4 G3 IC5 B6 Q4 B4 Q5 B4 Q6 B4 Q7 B4 Q8 B4 Q10 C6 Q11 C6 Q13 C4 Q14 B5 Q15 B5 Q16 B5 Q17 C4 Q18 B7 Q19 C7 Q20 C5 Q21 C5 OFF...

Page 12: ... E POW MAIN 1 Ref no Location D1 C4 D4 B5 D5 B4 D18 H6 D21 I6 D22 I5 D23 I2 D24 I5 D25 I2 D26 J5 Semiconductor Location Ref no Location D27 J5 D28 J5 D29 J2 D30 J2 D31 J2 D32 H4 D33 I3 D34 I4 D35 I3 IC6 B6 Ref no Location IC7 B6 IC8 B5 Q1 B5 Q2 B5 Q3 B5 Q9 B6 Q22 J3 Q23 I4 Q24A J2 Q24C J5 Ref no Location Q25 J4 Q26 J3 Q28 H4 Q29 I3 Q30 I4 Q31 I4 Q32 J5 Q33 J2 Q34 I4 CONFIRMATION OF AUTO STANDBY OP...

Page 13: ...08A µPC4570HA LB8555D Anode Cathode E C B B C E 2SC1846 B C E B E C 0 0 0 0 0 0 0 0 0 14 7 14 7 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 1 3 1 3 1 3 1 3 1 3 1 4 2 0 5 9 6 6 3 7 3 6 3 1 1 9 3 0 0 0 0 0 0 0 50 1 50 1 50 0 49 4 49 4 49 4 49 4 49 4 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 14 7 14 6 0 0 0 7 0 7 0 7 49 0 49 0 49 0 49 6 49 6 49 5 50 1 49 4 1 0 0 4 1 0 0 0 0 0 4 7 4 7 4 7 0 5 2 50 1 50 1 50 1...

Page 14: ...ET FL DSPLY FLUORESCENT DISPLAY FLTR CE CERAMIC FILTER FLTR COMB COMB FILTER MODULE FLTR LC RF LC FILTER EMI GND MTL GROUND PLATE GND TERM GROUND TERMINAL HOLDER FUS FUSE HOLDER IC PRTCT IC PROTECTOR JUMPER CN JUMPER CONNECTOR JUMPER TST JUMPER TEST POINT L DTCT LIGHT DETECTING MODULE L EMIT LIGHT EMITTING MODULE LED DSPLY LED DISPLAY LED INFRD LED INFRARED MODUL RF MODULATOR RF PHOT CPL PHOTO COU...

Page 15: ... C6 UA654220 C MYLAR 0 022uF 50V マイラーコン C7 UR837470 C EL 47uF 16V ケミコン 01 C8 FG612220 C CE 220pF 50V セラコン 01 C9 UR838100 C EL 100uF 16V ケミコン 01 C10 UR838100 C EL 100uF 16V ケミコン 01 C11 UR867100 C EL 10uF 50V ケミコン C13 UA654680 C MYLAR 0 068uF 50V マイラーコン 01 C14 UA654680 C MYLAR 0 068uF 50V マイラーコン 01 C15 VE327100 C MYLAR ML 0 82uF 50V 積層マイラーコン s C16 V7682500 C CE SAFTY 1500pF 250V 規格認定コン KH C17 VE3262...

Page 16: ...L MTL 0 1uF 250V メタライズドポリコン C60 UR877470 C EL 47uF 63V ケミコン C61 UR877470 C EL 47uF 63V ケミコン C62 UA655100 C MYLAR 0 1uF 50V マイラーコン 01 C63 UA655100 C MYLAR 0 1uF 50V マイラーコン 01 C64 V7093400 C EL 6800uF 63V ケミコン C65 V7093400 C EL 6800uF 63V ケミコン C66 UR867220 C EL 22uF 50V ケミコン 01 C67 UA655100 C MYLAR 0 1uF 50V マイラーコン 01 C68 UA655100 C MYLAR 0 1uF 50V マイラーコン 01 C69 UR867220 C EL 22uF 50V ケミコン 01 C70 UR...

Page 17: ...ナーダイオード 01 D36 VG440300 DIODE ZENR MTZJ12C 12V ツェナーダイオード 01 D37 VG440300 DIODE ZENR MTZJ12C 12V ツェナーダイオード 01 s F1 VS822900 FUSE T4A 125V JUC ヒユーズ s F1 KB000680 FUSE 1 25A 250V TKABG ヒューズ 02 s F1 VS822700 FUSE T3A 125V RL ヒユーズ s F2 KB000680 FUSE 1 25A 250V RL ヒューズ 02 G1 V5995800 PLATE GND アースプレート IC1 XM922A00 IC NJM4558L SINGLE IN LINE IC 01 IC2 XB247A00 IC uPC4570HA IC 01 IC3 XM922A00 IC NJM4558L ...

Page 18: ...抵抗 01 R12 HV756220 R CAR FP 2 2KΩ 1 4W 不燃化カーボン抵抗 01 R13 HV756220 R CAR FP 2 2KΩ 1 4W 不燃化カーボン抵抗 01 R52 HV753220 R CAR FP 2 2Ω 1 4W 不燃化カーボン抵抗 01 R52 HV753220 R CAR FP 2 2Ω 1 4W JUCTKABG 不燃化カーボン抵抗 01 R73 HV755150 R CAR FP 150Ω 1 4W 不燃化カーボン抵抗 01 R76 HV756100 R CAR FP 1KΩ 1 4W 不燃化カーボン抵抗 01 R80 HV756100 R CAR FP 1KΩ 1 4W 不燃化カーボン抵抗 01 R81 HB026270 R MTL FLM 2 7KΩ 1 4W 金属被膜抵抗 R92 HV755220 R CAR FP 220Ω 1 ...

Page 19: ...S 112LMR POWER リレー12V ST2 V4040500 SCR TERM M3 スクリュー ターミナル ST3 V4040500 SCR TERM M3 スクリュー ターミナル SW1 VL012000 SW SLIDE SSSF12 PHASE スライドSW 02 SW2 VD179500 SW SLIDE SSSU12 AUTO STANDBY スライドSW 02 SW3 VY858600 SW PUSH SPUP19145A B A S S プッシュSW SW4 VY858600 SW PUSH SPUP19145A STANDBY ON プッシュSW s SW5 V8377400 SW POWER SY16 52 4 POWER パワースィッチ s SW6 WC906700 SW SLIDE SDKPA40300 VOLTAGE SELECTOR RL スライドSW ...

Page 20: ...pe Part No 1 0 Ω HJ35 3100 HF85 3100 1 8 Ω HJ35 3180 2 2 Ω HJ35 3220 HF85 3220 3 3 Ω HJ35 3330 HF85 3330 4 7 Ω HJ35 3470 HF85 3470 5 6 Ω HJ35 3560 HF85 3560 10 Ω HF45 4100 HF45 4100 15 Ω HJ35 4150 HF85 4150 22 Ω HF45 4220 HF45 4220 27 Ω HJ35 4270 HF85 4270 33 Ω HF45 4330 HF45 4330 39 Ω HJ35 4470 HF85 4390 47 Ω HF45 4470 HF45 4470 56 Ω HF45 4560 HF45 4560 68 Ω HF45 4680 HF45 4680 75 Ω HF45 4750 HF4...

Page 21: ...6 4 32 4 11 4 16 4 7 4 32 3 5 3 4 3 5 3 3 3 11 3 4 3 1 4 37 4 37 4 1 1 10 4 1 1 4 4 1 1 3 4 1 1 4 2 6 4 2 6 5 4 1 1 4 1 12 4 1 5 4 1 7 4 1 6 4 1 5 4 1 6 4 1 11 1 4 1 1 2 4 1 1 4 1 1 4 2 1 4 2 3 4 2 4 9 4 1 1 8 4 1 1 TRANSISTOR Replace this Bush with the new article when remove the Rear Panel Ass y リアパネルAss yを外した場合は このブッシュを新品に交換してくだ さい 2SB1340 2SD1889 2SD1889 2SC1846S 2SB1340 ...

Page 22: ...s 4 4 X4333A00 POWER TRANSFORMER A 電源トランス s 4 4 X4334A00 POWER TRANSFORMER BG 電源トランス s 4 5 V6893000 POWER CABLE 2m J 電源コード s 4 5 V2689600 POWER CABLE 2m UC 電源コード s 4 5 WD042000 POWER CABLE 2m R 電源コード s 4 5 VZ555600 POWER CABLE 2m T 電源コード s 4 5 V8012900 POWER CABLE 2m K 電源コード s 4 5 WC883100 POWER CABLE 2m A 電源コード s 4 5 V6977100 POWER CABLE 2m B 電源コード s 4 5 V6893100 POWER CABLE 2m GL 電源コード 4 6 CB072...

Page 23: ...YST SW225 24 YST SW225 ...

Reviews: