Yamaha-YSTSW-320-Service-Manual电路原理图.pdf

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1、YST-SW320 YST-SW320 SERVICE MANUAL I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . .1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 REAR PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 DISASSEMBLY PROCEDURES . . . . . . . . . . . .

2、 . . .34 ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . .712 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . .13 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . .14 PARTS LIST . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . .1522 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 th

4、e 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 YAMA

5、HA 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 tech

6、nical 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. Modificati

7、ons are, therefore, inevitable and specifications are subject 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 you

8、r 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. IMPORTANT NOTICE 100720 SERVICE MANUAL YST-SW320

9、SUBWOOFER SYSTEM YST-SW320 YST-SW320 I TO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When

10、service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. GMeter impedance should be equivalent to 1500 ohm shunted by 0.15F. AC LEAKAGE TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL OUTLET WARNING: CHEM

11、ICAL 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 by the California Health and Welfare Agency (and possibly other entities) to cause ca

12、ncer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux

13、vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. 1 GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. ISPECIFICATIONS Type . . . . . . . . . Advanced Yama

14、ha Active Servo Technology Driver . . . . . . . . . . . 25 cm (9-13/16) cone woofer (JA25600) Magnetically shielded type Amplifier Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250W/5 Frequency Response . . . . . . . 20 Hz to 160 Hz (-24 dB/oct.) Power Supply U, C models . . . . . .

15、 . . . . . . . . . . . . . . . . . . .AC120V, 60 Hz A model . . . . . . . . . . . . . . . . . . . . . . . . . . . .AC240V, 50 Hz B, G models . . . . . . . . . . . . . . . . . . . . . . . . .AC230V, 50 Hz R, T models . . . . . . . . . . . .AC110/120/220/240V, 50/60 Hz Power Consumption . . . . . . .

16、. . . . . . . . . . . . . . . . . . . . . .60W Dimensions (W x H x D) . . . . . . . . . . . . 340 x 432 x 370 mm (13-3/8 x 17 x 14-9/16) Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 kg (37 lbs. 7 oz) Finish All model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Blac

17、k color R, T, G models . . . . . . . . . . . . . . . . . . . . . . . . Cherry color Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . Nonskid pad x 4 * Specifications subject to change without notice. U . . . . . . . . . . USA model C . . . . . .Canadian model A . . . . . Australian mo

18、del B . . . . . . . . British model G . . . . . European model R . . . . . . . General model T . . . . . . . . . China model YST-SW320 YST-SW320 I REAR PANEL M U, C modelsM A model M B, G models M R modelM T model 2 R, T models only YST-SW320 YST-SW320 IDISASSEMBLY PROCEDURES (Remove parts in the or

19、der as numbered.) 1. Removal of Front Panel Assy Remove 4 screws ( q ) and then remove the Front Panel Assy in Fig. 1. *Use an Allen wrench (3mm) to unscrew the Front Panel Assy. Fig. 2 Fig. 1 *When assembling the Rear Panel, check to ensure that the gasket is not damaged so as to prevent air leakag

20、e from occurring. Fig. 3 3 2. Removal of Loud Speaker a. Remove 8 screws ( w ) and then remove the Base Assy in Fig. 2. b. Remove 4 screws ( e ) and then remove the Loud Speaker in Fig. 2. 3. Removal of Rear Panel Assy Remove 12 screws ( r ) in Fig. 3. *Arrow marks ( ) are printed to identify the sc

21、rews to be removed. GInstallation of emblem 1. Put the emblem into the cabinet at the specified posi- tion. 2. Place a piece of cloth/wood on top of the emblem. 3. Using a mallet, hammer the emblem in place through the cloth/wood. *Use special care not to cause damage to the emblem or cabinet while

22、hammering the emblem. q q Front Panel Assy Main (5) P.C.B. w w w w e e Loud Speaker Base Assy r r r Rear Panel Assy r YST-SW320 YST-SW320 Glue List PlaceName Cord stopper5 minute epoxy or 2051(Revertex Finewaters SDN.BHD.) or VYLOK 917DH (National Starch & Chemical (M) SDM.BHD.) Power switch5 minute

23、 epoxy or Diabond 1620B 4 370 (14-9/16) 22 8 340 (13-3/8) 432 (17) 340 (13-3/8) 340 (13-3/8)(5/16) (7/8) GInstallation of power switch Rapid cures bond (such as 5 minute epoxy) is required to fix the power switch. As shown in Fig. A, apply rapid cures bond (such as 5 minute epoxy) to the power switc

24、h (the area which contacts the rear panel), insert it in the rear panel and make sure it is fixed. (Inserting the power switch in the rear panel only would not be sufficient for its secure installation.) GPrecaution for installation of power cord After connecting the power cord, be sure to apply the

25、 rapid cures bond (such as 5 minute epoxy) to the cord stopper as shown in Fig. A, Bond application diagram (Fig. A) G Dimensions Units : mm (inch) Apply rapid cures bond Apply rapid cures bond YST-SW320 YST-SW320 5 I ADJUSTMENTS GIdling Adjustment To stabilize operation of the amplifier, turn ON th

26、e power with no input signal and wait for 1 or 2 minutes in non loaded condition before the adjustment. Adjust VR1 so that the voltage between terminals TP11 and TP12 is DC 50mV to 250mV. Point A(Cathode of D29) V : 20V/divH : 2 msec/div DC range1 : 1 probe 0V Point B(Anode of D30) V : 20V/divH : 2

27、msec/div DC range1 : 1 probe 0V GConfirmation of Power Amp operation For the power amplifier which has been repaired, it is absolutely necessary to confirm that a correct waveform is obtained at points indicated by A and B in the schematic diagram according to the following procedure. Devices requir

28、ed Signal generator 8 or 6 load resistor Oscilloscope (dual trace type) Connection 1) Connect the output signal from the signal generator to the input terminal of YST-SW320. 2) Disconnect the connector terminal connected to the speaker unit and reconnect it to the load resistor. 3) Connect the HOT s

29、ide of the oscilloscope CH1 probe to the point A or B indicated in the figure and the GND side to the GND of the main unit. 4) Connect the oscilloscope CH2 input to the red side of the connector cable, which is connected with the load resistor. At this time, the GND terminal of CH2 must be left unco

30、nnected. Setting 1) Set the signal generator to the sine wave, 100Hz and minimum output level settings. 2) Set the volume of YST-SW320 to the minimum position. 3) Turn on the power to YST-SW320. 4) Adjust the output level of the signal generator and the volume of YST-SW320 so that the output level o

31、bserved at oscilloscope CH2 is 28Vp-p. Waveform observation With the settings made as described above, observe the waveform obtained at CH1 for judgment. NormalNormal Abnormal +B or GND level Becomes constant Abnormal -B or GND level Becomes constant GConfirmation of AUTO STANDBY Measuring Condition

32、 R60 = 1M 1M/10k F = 100Hz Input Level = 4mV Load = Open Rating After 2 to 8 sec. STANDBY (LED become red) Dont STANDBY Remarks VOLUME: MAX HIGH CUT: MAX AUTO STANDBY: LOW VOLUME: MAX HIGH CUT: MAX AUTO STANDBY: HIGH YST-SW320 YST-SW320 6 IDLING CURRENT ADJ. DC 50mV to 250mV A B RE WH Main (1) P.C.B

33、 DC 50mV to 250mV TP11 (+) TP12 (-) VR1 D30 D29 Point A Point B G Schematic Diagram G Test Points ABCDE 1 2 3 4 5 6 7 YST-SW320 I PRINTED CIRCUIT BOARD (Foil side) 7 81 FROM : MAIN (2) RE WH W19 W20 TO : SPEAKER +V1 AYST DR OUT DR+ B1 E +B1 RE BL RE W7 W6 W5 TO : MAIN (6) FROM : MAIN (2) IDLING CURR

34、ENT ADJ. Q16C Q1CQ9Q1A Q17CQ17AQ16A MAIN ( 1 ) P. C. B. A B DC 50mV to 250mV IDLING TEST POINT ABCDE 1 2 3 4 5 6 7 YST-SW320 I PRINTED CIRCUIT BOARD (Foil side) 8 91 91 BE BL BE W16 W15 W14 TO : MAIN (6) TO : MAIN (1) DR+ OUT DR AYST +V1 #17 W17 TO : MAIN (3) VCC VCC E E PWS +V1 #2 W2 FROM : MAIN (4

35、) MA1 E TOVL +12 12 LIM MA2 FROM : MAIN (5) TVOL E MAIN +V2 +12 12 PWS VCC +B1 E B1 #18 W18 TO : MAIN (1) MAIN ( 2 ) P. C. B. ABCDE 1 2 3 4 5 6 7 YST-SW320 I PRINTED CIRCUIT BOARD (Foil side) 9 8 91 1 MAIN ( 3 ) P. C. B. MAIN ( 7 ) P. C. B. FROM : MAIN (2) +V1 PWS E E VCC VCC FROM : MAIN (4) SWL SWH

36、2 SWH1 SO G R, T models W11 GR W10 BR TO : VOLTAGE SELECTOR OR W12 GY W13 TO : MAIN (8) W9 BE GY BL OR WH BE RE W8 RE TO : POWER CORD TO : POWER TRANSFORMER TO : VOLTAGE SELECTOR ABCDE 1 2 3 4 5 6 7 YST-SW320 I PRINTED CIRCUIT BOARD (Foil side) 10 81 91 MAIN ( 3 ) P. C. B. MAIN ( 7 ) P. C. B. OR W12

37、 BE W9 WH W8 GY W13 TO : MAIN (8) FROM : POWER CORD TO : POWER TRANSFORMER FROM : MAIN (2) +V1 PWS E E VCC VCC FROM : MAIN (4) SWL SWH2 SWH1 SO G U, C, A, B, G models ABCDE 1 2 3 4 5 6 7 YST-SW320 91 18 BASSPHASEAUTO STANDBY INPUT 2 RL+ OUTPUT INPUT 1 MA2 LIM 12 +12 TOVL E MA1 TO : MAIN (2) #1 W1 SW

38、L SWH2 SWH1 SO TO : MAIN (3) #4 W4 MAIN ( 4 ) P. C. B. R, T, B, G ONLY 91 FROM : MAIN (2) TOVL E MAIN +V2 +12 12 PWS VCC VOLUMEHIGH CUT SATNDBY/ ON MAIN ( 5 ) P. C. B. 11 I PRINTED CIRCUIT BOARD (Foil side) ABCDE 1 2 3 4 5 6 7 YST-SW320 W7 W6 W5 W14 W15 W16 FROM : POWER TRANSFORMER RE BL RE BE BL BE

39、 TO : MAIN (2) TO : MAIN (1) MAIN ( 6 ) P. C. B. W12 W13 OR GY TO : MAIN (3) MAIN ( 8 ) P. C. B. POWER 12 I PRINTED CIRCUIT BOARD (Foil side) ABCDE 1 2 3 4 5 6 7 YST-SW320 IC11A IC11B IC7A AUTO STANDBY SW3 AUTO POWER ON/OFF CIRCUIT VR3 VOLUME L.P.F. 6dB/oct B.P.F Q3336 L.P.F. 12dB/oct 3 61 5 76 8 IC

40、7B IC3 Q22, 23 4 2 D8 D17 D9 D18 Q15 2 HIGH CUT VR2 PROTECTION H/L OFF PWR R60 C45 TIMER IC5 MUSIC SENSOR IC4 8 4 6 3 7 Q12 PWR REGULATOR IC12 Q11 L R + + INPUT 1 L R INPUT 2 L R + + OUTPUT IC1A 4 3 2 SW2 PHASE SELECT IC1B L.P.F. 12dB/oct 6 8 BASS SELECT SW4 + PRE DRIVE Q28, 10 POWER DRIVE Q9, 16A/C

41、, 26A/C, Q28, 29 A.N.I.C LIMITER RY1 IC8, 9 Q25 D12, 13, 19 Q1821 D6, 14, 33, 34 0.1 SPEAKER Q1C, 17C, 24A Q27, 31 PS AMP Q1A, 17A, 24C Q30, 32 PS AMP B +B H.P.F. 12dB/oct + + +12 12 REGULATOR POWER SUPPLY D2 IC6 IC10 F1 POWER SW5 +B B POWER SUPPLY D1 STANDBY/ON SW1 R, T ONLY REGULATOR Q13, 14 D15 S

42、UB POWER SUPPLY D11 RY2 T1 + I BLOCK DIAGRAM 13 ABCDEFGH 1 2 3 4 5 6 IJK 7 8 YST-SW320 ISCHEMATIC DIAGRAM VO1 2 Vm1 3 +Vm1 4 VEE 5 +Vm2 6 Vm2 7 VO2 8 VCC 9 VCC 1 1 + 2 IC1, 4, 79 : PC4570HA Dual OP-Amp IC5 : M51848L CR Timer * All voltage are measured with a 10M/V DC electric volt meter. * Component

43、s having special characteristics are marked Zand must be replaced with parts having specifications equal to those originally installed. * Schematic diagram is subject to change without notice. 2SK304 (E, T)NJM4558L PC1237HA M51848L PC4570HA 1 9 1SS133 S2L20U 1SR139-400 MTZJ3.6B MTZJ12.0C MTZJ24.0B A

44、node Cathode B C E 2SA970 (GR, BL) 2SA1015 (Y) 2SA1145 (O, Y) 2SC1815 (Y, GR) 2SC2240 (GR, BL) 2SC2705 (O, Y) 2SC2878 (A, B) RBV-602 D GS 2SA1492Z (O, P, Y) 2SC3856Z (O, P, Y) 2SC4688 (R, O) PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. 14 L.P.F. L.P.F. L.P.F.H.P.F. B.P.F. LIMITER PRE DRIVE

45、POWER DRIVE PS AMP PROTECTION POWER SUPPLY A.N.I.C POWER SUPPLY SUB POWER SUPPLY AUTO POWER ON/OFF CIRCUIT 0 0 0 11.8 3.4 3.4 2.7 5.9 -0.1 0 0 0.6 0 0 -0.1 0 0 0 -11.9 0 0 0 -11.9 0 0 0 11.8 0 01.8 0 0 0.6 7.9 7.3 0 0 0 -11.9 0 0 0 11.8 AC 97.6V AC 25.9V AC 11.2V 0 11.5 5.6 5.6 11.5 0.9 0 0.7 11.5 0

46、 7.9 0 3.9 7.9 6.7 0 3.9 6.6 1.3 0 0 7.5 0 1.3 6.6 7.9 5.3 7.5 7.5 7.9 0 0 -16.4 16.4 0 16.411.8 0 -16.4 -11.9 6.6 6.0 0 0 0 11.8 0 0 -0.3 -0.3 -11.9 0 0 0 0 -11.9 0 0 0 0 11.8 0 0 -1.5 000 00.1 0.10.1 -11.9 11.8 0 00 0 00 -62.5 -61.9 -61.8 -61.9 -62.5 -61.4 -61.8 -61.4 -1.6 -61.4 -61.8-61.8 0 0.2 0

47、.7 0.7 61.6 62.1 62.9 62.4 61.661.6 62.1 1.7 -1.0 -1.6 1.7 1.7 1.1 4.2 63.1 63.1 3.6 1.1 3.6 0.6 0.6 2.6 3.2 62.6 0 63.1 63.062.6 62.762.7 63.1 62.4 63.1 2.6 2.6 63.1 0 0 63.1 62.4 62.4 0 0 0 -2.7 -62.3 -3.2 -0.5 -0.5 -1.0 -62.8 -3.6 -3.6 -1.0 -4.2 -62.8 -1.6 -62.8 -62.3 -62.9 -63.4 -62.8 62.8 -63.1

48、 -63.4 -62.8 -2.6 -2.6 -2.7 0 -62.8 3.3 0 0.7 0 2.0 0 0 0 6.6 6.0 0.7 24.3 63.1 0 0 -62.8 4.2 IDLING CURRENT ADJ. DC 50mV to 250mV A B + BCE 2SA1837 2SC4793 1 8 IC11 : NJM4558L Dual OP-Amp IN1 2 +IN1 3 VCC 4 +IN2 5 IN2 6 OUT2 7 +VCC 8 OUT1 1 + + IC3 : PC1237HA Protector IC for Power Amplifier 1 2 53

49、4 78 6 Overload detect Mid-point potential detect Flip flop circuit Vcc on mute AC OFF detect Latch / automatic return select Relay drive circuit GND Vcc GND 64123 TRIGGER OUT RESET REFERENCE VOLTAGE THRESHOLD DISCHARGE VCC 78 + FLIP- FLOP + 5 RRR S1NB20 + 2SC1846S EC B 1 2 3 1:OUTPUT 2:COMMON 3:INPUT NJM78L08A BC E NJM78M12FANJM79M12FA 1: OUTPUT 2: COMMON 3: INPUT 32 1 1:COMMON 2:INPUT 3:OUTPUT32 1 YST-SW320 YST-SW320 15 ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS : C.A.EL.CHP: CHIP ALUMI. ELECTROLYTIC CAP C.CE: CERAMIC CAP