Yamaha-YSTSW-205-Service-Manual电路原理图.pdf
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1、SERVICE MANUAL SUBWOOFER SYSTEM YST-SW205/305 100768 I CONTENTS TO SERVICE PERSONNEL . 1 SPECIFICATIONS. 2 INTERNAL VIEW . 3 REAR PANELS . 45 DISASSEMBLY PROCEDURES . 6 ADJUSTMENTS.78 BLOCK DIAGRAM. 9 PRINTED CIRCUIT BOARD . 1015 SCHEMATIC DIAGRAM . 1617 PARTS LIST . 1831 IMPORTANT NOTICE This manua
2、l 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:
3、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 p
4、erformed 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 rela
5、tionship 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 s
6、ubject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to th
7、e 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. YST-SW205/305 P.O.Box 1, Hamamatsu, Japan YST-SW205 YST-SW305 YST-SW205/305 YST-SW205/305 1 WALL OUTLET
8、EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found b
9、y the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA- SON WHATSOEVER! Avoid prolonged, unprotected contact between solder an
10、d 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. I TO SERVICE PERSONNEL 1. Critical Components Information Components havin
11、g special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insula
12、ted from supply circuits. GMeter impedance should be equivalent to 1500 ohm shunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. YST-SW205/305 YST-SW205/305 I SPECIFICATIONS YST-SW205YST-SW305 TypeAdvanced Yamaha Active Servo Tec
13、hnology Output Power150 W/100 Hz, 5 10% T.H.D.200 W/100 Hz, 5 10% T.H.D. Input Sensitivity INPUT 1 (SP)0.8 V (50 Hz, 150 W/5, L+R)1.0 V (50 Hz, 200 W/5, L+R) INPUT 2 (PJ)40 mV (50 Hz, 150 W/5, L+R)50 mV (50 Hz, 200 W/5, L+R) Input Impedance INPUT 1 (SP)2.2 k INPUT 2 (PJ)12 k Frequency Response23 Hz
14、170Hz20 Hz 160Hz Driver Unit20 cm (8) cone20 cm (8) cone magnetic shielding type x 1magnetic shielding type x 2 Input Section INPUT 1Speaker terminal INPUT 2RCA pin jack Power Supply U, C modelsAC120V, 60Hz A modelAC240V, 50Hz B, G modelsAC230V, 50Hz R, T modelsAC110/120/220/240V, 50/60Hz Power Cons
15、umption70 W80 W Standby Power Consumption0.8 W0.8 W Dimensions (W x H x D)235 x 485 x 402 mm235 x 585 x 445 mm (9-5/16 x 19-1/16 x 15-13/16)(9-5/16 x 23 x 17-1/2) Weight15 kg (33 lbs. 1 oz.)21 kg (48 lbs. 8 oz.) Finish All modelsBlack color / Cherry color AccessoryNonskid Pad x 4 U . U.S.A. modelC.
16、Canada modelA .Australia modelB . British model G. Europe modelR. General modelT.China model Specifications are subject to change without notice due to product improvements. 235 (9-5/16)351 (13-13/16)19 (3/4) 32 (1-1/4) 402 (15-13/16) 485 (19-1/16) DIMENSIONS 2 235 (9-5/16)394 (15-1/2)19 (3/4) 32 (1
17、-1/4) 445 (17-1/2) 585 (23) Unit : mm (inch) YST-SW205 YST-SW305 YST-SW205/305 YST-SW205/305 3 1 2 3 4 5 6 7 8 9 0 I INTERNAL VIEW 1 MAIN (5) P. C. B. 2 MAIN (4) P. C. B. 3 MAIN (10) P. C. B. 4 MAIN (3) P. C. B. 5 MAIN (9) P. C. B. R, T models only 6 MAIN (8) P. C. B. U, C, A, B, G models MAIN (7) P
18、. C. B. R, T models 1 2 3 4 5 6 8 9 0 7 YST-SW205 YST-SW305 7 MAIN (1) P. C. B. 8 MAIN (2) P. C. B. 9 MAIN (6) P. C. B. 0 Power Transformer YST-SW205/305 YST-SW205/305 70 WATTS I REAR PANELS U, C modelsA modelB, G model R modelT model 4 YST-SW205 YST-SW205/305 YST-SW205/305 5 80WATTS 80WATTS U, C mo
19、delsA modelB, G model R modelT model YST-SW305 YST-SW205/305 YST-SW205/305 3 3 44 4 4 4 4 Extension cable CB3 CB9CB9 2 2 Front Panel Assy Main (5) P.C.B. 1 (Remove parts in the order as numbered.) G For exchanging the driver unit 1. Removal of Front Grille The front grille is fixed to the cabinet wi
20、th dowels at 6 locations. As a screwdriver (for slotted head screw) is used for removal, use special care not to cause damage to the cabinet. a. Apply the block to the rear panel so as to avoid damage to the Terminal of the rear panel. b. Use the screwdriver inserted in the gap between the front gri
21、lle and the cabinet (bottom side first), push up the front grille. (Fig. 1) c. Remove the front grille by lifting it up. (Fig. 1) 2. Removal of Driver unit a. Remove 4 (8 when YST-SW305) screws (1) in Fig. 2, and remove the Driver unit. b. Remove the cable cord. G For repairing P.C.B. Repairing P.C.
22、B. is possible without removing front grille. 1. Removal of Front Panel Assy Remove 2 screws (2) and then remove the Front Panel Assy in Fig. 3. *Use an Allen wrench (3 mm) to unscrew the Front Panel Assy. 2. Removal of Rear Panel Remove 4 screws (3) and 12 screws (4) in Fig. 4, and remove the rear
23、panel. At this time, disconnect the connector CB3 of MAIN (2) P.C.B. *When removing the rear panel, replace the packing. 3. P.C.B. Operation Check a. Disconnect the connector CB9 of MAIN (5) P.C.B. b. Connect the connector CB3 of MAIN (2) P.C.B. and CB9 of MAIN (5) P.C.B. by using an extension cable
24、. (Fig. 4) Extension cable : V7278000 (9P, 700 mm) I DISASSEMBLY PROCEDURES Fig. 1 Fig. 2 Fig. 3 Fig. 4 6 YST-SW205/305 YST-SW205/305 7 I ADJUSTMENTS G Confirmation of Power Amp operation For the power amplifier which has been repaired, it is absolutely necessary to confirm that a correct waveform i
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