Yamaha-YSTSW-800-Service-Manual电路原理图.pdf

YST-SW800 YST-SW800 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 distributors 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. IMPORTANT NOTICE 100721 SERVICE MANUAL YST-SW800 SUBWOOFER SYSTEM I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . .1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 REAR PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . .34 REPAIR PROCEDURES . . . . . . . . . . . . . . . . . . . . .56 ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . .78 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . .912 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . .13 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . .1415 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1624 YST-SW800 YST-SW800 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 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: 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 by 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 REASON 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. 1 GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. ISPECIFICATIONS U . . . . . . . . . . USA model C . . . . . .Canadian model A . . . . . Australian model B . . . . . . . . British model G . . . . . European model Type . . . . . . . . . Advanced Yamaha Active Servo Technology Driver . . . . . . . . . . . 25 cm (9-13/16) cone woofer (JA25610) Magnetically shielded type Amplifier Output U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1kW A, B, G models . . . . . . . . . . . . . . . . . . . . . . . . . . . 800W/6 Input Impedance INPUT1 (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.7k INPUT2 (PJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12k Frequency Response . . . . . . . . . . .18 Hz to 160 Hz (-10 dB) Power Supply U, C models . . . . . . . . . . . . . . . . . . . . . . . . .AC120V, 60 Hz A model . . . . . . . . . . . . . . . . . . . . . . . . . . . .AC240V, 50 Hz B, G models . . . . . . . . . . . . . . . . . . . . . . . . .AC230V, 50 Hz Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . .250W Dimensions (W x H x D) . . . . . . . . . . . . 390 x 482 x 420 mm (15-3/8 x 19 x 16-9/16) Weight . . . . . . . . . . . . . . . . . . . . . . . . . . 24 kg (52 lbs. 14 oz) Finish All model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black color G model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cherry color Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . Nonskid pad x 4 * Specifications subject to change without notice. YST-SW800 YST-SW800 I REAR PANEL 2 M U, C modelsM A modelM B, G models YST-SW800 YST-SW800 3 IDISASSEMBLY PROCEDURES (Remove parts in the order 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 leakage from occurring. Fig. 3 2. Removal of Loud Speaker a. Remove 8 screws ( w ) and then remove the Base Assy in Fig. 2. b. Remove 8 screws ( e ) and then remove the Loud Speaker in Fig. 2. 3. Removal of Rear Panel Assy Remove 16 screws ( r ) in Fig. 3. *Arrow marks ( ) are printed to identify the screws 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 hammering the emblem. q q Front Panel Assy Main (5) P.C.B. w w w w e e Loud Speaker Base Assy r Rear Panel Assy r YST-SW800 YST-SW800 4 420 (16-9/16) 22 (7/8) 8 (5/16) 390 (15-3/8)390 (15-3/8) 482 (19) 390 (15-3/8) GInstallation of power switch Rapid cures bond (such as 5 minute epoxy) is required to fix the power switch. As shown in Fig. 4, apply rapid cures bond (such as 5 minute epoxy) to the power switch (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 rapid cures bond (such as 5 minute epoxy) to the cord stopper as shown in Fig. 4, Bond application diagram (Fig. 4) G Dimensions Units : mm (inch) Apply rapid cures bond Apply rapid cures bond between the switch and rear panel. Glue List PlaceName Cord stopper5 minute epoxy or 2051(Revertex Finewaters SDN.BHD.) or VYLOK 917DH (National Starch connect a 10k resistor at both ends of R162 on the MAIN (2) P.C.B. 3) Connect the output signal from the signal generator to the L/MONO terminal of YST-SW800. 4) Set the signal generator for the sine wave of 100Hz, 8mV. 5) Turn on the power switch. Confirmation 1) Set the AUTO STANDBY switch to the LOW position. 2) Turn on the STANDBY/ON switch. The display LED lights up (green) and its color changes to red after 5 to 10 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 off the power switch. 2) Disconnect the 10k resistor connected to both ends of R162. YST-SW800 YST-SW800 8 G Schematic Diagram G Test Points Q18Q16Q22Q24 Q39 Q25Q23Q17Q19 B GND + B Main (1) P.C.B DC 50mV to 250mV Point A Point B IDLING CURRENT ADJ. DC 50mV to 250mV A B RE WH ABCDE 1 2 3 4 5 6 7 YST-SW800 I PRINTED CIRCUIT BOARD (Foil side) 9 81 RE BL RE TO : POWER (1) #201 BE BL BE TO : POWER (1) #202 BA Q19Q17Q23Q25Q39Q24Q22Q16Q18 MAIN ( 1 ) P. C. B. 12 +12 FROM : MAIN (2) B1 E +B1 FROM : MAIN (2) FROM : MAIN (2) DR+ OUT DR AYST +V1 RE WH TO : SPEAKER IDLING CURRENT ADJ. DC 50mV to 250mV IDLING TEST POINT ABCDE 1 2 3 4 5 6 7 YST-SW800 I PRINTED CIRCUIT BOARD (Foil side) 10 8191 91 91 MAIN ( 2 ) P. C. B. +B1 E B1 TO : MAIN (1) #10 W10 FROM : MAIN (4) MA1 E TOVL +12 12 LIM MA2 FROM : MAIN (5) TVOL E MAIN +V2 +12 12 PWS VCC +12 12 TO : MAIN (1) #12 W12 FROM : MAIN (4) SWL SWH2 SWH1 SO TO : POWER (1) #2 W2 VCC +V1 E DR+ OUT DR AYST +V1 TO : MAIN (1) #11 W11 ABCDE 1 2 3 4 5 6 7 YST-SW800 I PRINTED CIRCUIT BOARD (Foil side) 11 81 19 MAIN ( 4 ) P. C. B. BASSPHASEAUTO STANDBY INPUT 2 B, G only RL+ OUTPUT INPUT 1 MA2 LIM 12 +12 TOVL E MA1 TO : MAIN (2) #1 W1 SWL SWH2 SWH1 SO TO : MAIN (3) #4 W4 19 VCC PWS 12 +12 +V2 MAIN E TOVL FROM : MAIN (2) VOLUMEHIGH CUT STANDBY/ ON MAIN ( 5 ) P. C. B. OR GY TO : POWER (1) POWER ( 2 ) P. C. B. POWER ABCDE 1 2 3 4 5 6 7 YST-SW800 I PRINTED CIRCUIT BOARD (Foil side) 12 TO : POWER (2) OR GY FROM : POWER CORD B1 E +B1 FROM : MAIN (2) RE BL RE BE BL BE FROM : MAIN (1) POWER ( 1 ) P. C. B. C D J, U, C only A, B, G only A, B, G only Point C(Pin 1 of CB201) V : 50V/divH : 10 sec/div DC range1 : 1 probe 0V Point D(Pin 1 of CB202) V : 10V/divH : 10 sec/div DC range1 : 1 probe 0V ABCDE 1 2 3 4 5 6 7 YST-SW800 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 IC7B IC3 Q26, 27 4 2 D36 D40 D43 D39 Q37 2 HIGH CUT VR2 PROTECTION H/L OFF PWR R162 C84 TIMER IC5 MUSIC SENSOR IC4 8 4 6 3 7 Q41 PWR REGULATOR IC202 Q201 L R + + INPUT 1 L R INPUT 2 L R + + OUTPUT IC6A 4 3 2 SW2 PHASE SELECT IC6B L.P.F. 12dB/oct 6 8 BASS SELECT SW4 + PRE DRIVE Q512 POWER DRIVE Q39, 3A/C Q1619 A.N.I.C LIMITER RY3 IC1, 2 Q32 D32, 33, 35 Q2831 D2831 0.1 SPEAKER Q1C, 2C, 4A Q20, 22, 24, 40 Q1A, 2A, 4C Q15, 21, 23, 25 B +B H.P.F. 12dB/oct + + +12 12 REGULATOR POWER SUPPLY IC8 IC9 POWER SW201 +B B POWER SUPPLY STANDBY/ON SW1 SUB POWER SUPPLY D203 RY201 T201 + D48 D47 D49 D50 F201L201 SWITCHING POWER SUPPLY Q202207 D201, 202 D205209 T202 16 15 14 13 12 11 7 8 5 4 2 1 6 3 See page 15 See page 14 I BLOCK DIAGRAM 13 ABCDEFGH 1 2 3 4 5 6 IJK 7 8 YST-SW800 ISCHEMATIC DIAGRAM VO1 2 Vm1 3 +Vm1 4 VEE 5 +Vm2 6 Vm2 7 VO2 8 VCC 9 VCC 1 1 + 2 IC1, 2, 4, 6, 7 : PC4570HA Dual OP-Amp IC5 : M51848L CR Timer * All voltage are measured with a 10M/V DC electric volt meter. * Components 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)NJM4558L PC1237HA M51848L PC4570HA 1 9 1SS133 S2L20U EL02Z 1SR139-400 MTZJ2.0B MTZJ12.0B MTZJ24.0B Anode Cathode B C E 2SA970 (GR, BL) 2SA1015 (O, Y) 2SA1689 (E, F) 2SC1815 (Y, GR) 2SC2240 (GR, BL) 2SC4449 (E, F) 2SC2878 (A, B) D GS 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 DRIVEPOWER DRIVE PROTECTION POWER SUPPLY A.N.I.C AUTO POWER ON/OFF CIRCUIT 0 0 0 11.8 8.6 -4.4 11.8 7.9 8.5 0 0 4.1 0 0 0.7 0 0 0 -12.0 0 0 0 -12.0 0 0 0 11.8 0 01.8 0 0 0.6 7.8 7.2 0 0 0 -12.0 0 0 0 11.8 0 3.9 7.8 0 3.9 6.9 0 0 7.5 0 1.4 6.5 7.8 5.2 7.7 7.7 7.8 6.5 5.9 0 0 0 11.8 0 0 -0.3 -0.3 -12.0 -0.4 0 0 0 -12.0 0 0 0 0 11.8 0 0 -1.5 000 0.2-0.1 -0.30.2 -12.0 11.8 0 00 0 00 -112 -111 -111 -111 -112 -111 -111 -110 -3.4 -111 -111-111 0.20.2 0.7 0.7 110 112 112 111 110110 111 3.4 -2.6 -3.4 3.4 3.4 2.9 6.0 112 111 5.5 2.9 5.5 2.3 2.3 0.1 2.3 4.7 2.3 111 111 111 110 110 111 111 111 4.7 4.7 111 0 0 111 0.1 0.1 0 -4.3 -4.9 -2.0 -0.1 -2.1 -2.1 -111 -5.2 -2.7 -2.7 -5.8 -111 -3.2 -111 -110 -110 -111 -111 -111 -110 -111 -4.3 -4.3 -4.3 -111 3.1 2.1 0.8 0 2.0 0 0 6.6 6.0 0.811.8 6.0 IDLING CURRENT ADJ. DC 50mV to 250mV A B 0.7 -110 0 0 0.1 2.9 111 5.1 5.15.1 111 4.7 4.7 110 0.1 110 4.7 4.7 4.7 4.7 111 4.7 4.7 4.70 111 -2.7 -4.9 -5.2 -4.9 -110-110 -4.3 -4.3-4.3 -4.3 -4.3 0 0.1 -4.3 0-4.3 -111 112 -0.8 -1.5 -0.8-1.5 112-111 0 15.3 0 15.3 11.8 0 -12.0 -15.3 0 0 -15.3 0 CIRCUIT CHANGES BY MARKET. X : NOT USED RE WH 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 2 534 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 2SC1846S EC B 2SK237B 2SJ406 NJM78M12FANJM79M12FA 1: OUTPUT 2: COMMON 3: INPUT 32 1 1:COMMON 2:INPUT 3:OUTPUT32 1 GD S FMU-12R FMU-34R FMU-12S FMU-34S Point A(Cathode of D27) V : 50V/divH : 2 msec/div DC range1 : 1 probe 0V Point B(Anode of D24) V : 50V/divH : 2 msec/div DC range1 : 1 probe 0V 1 3 2 1:Cathode 2:Anode 3:Cathode 3 2 1 1 3 2 1:Anode 2:Cathode 3:Anode 3 2 1 SAME PAGE D-3 SAME PAGE E-7 P15 I-2 P15 I-4 P15 I-5 ABCDEFGH 1 2 3 4 5 6 IJKL 7 8 YST-SW800 ISCHEMATIC DIAGRAM * All voltage are measured with a 10M/V DC electric volt meter. * Components 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. 1SS133 1SR139-400 Anode Cathode B C E 2SC2240 (GR, BL) 2SD400 (F) RBV-6062SC4140 PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. + BCE 2SC4163S1NB20 + 1 2 3 1:OUTPUT 2:COMMON 3:INPUT NJM78L08A BC E -1.3 -1.3 -1.4 -1.4 -1.4 -1.3-1.5 -1.5 -1.3 8.8 -1.3 0.1 8.8 8.8 0.4 9.3 9.3 0.4 9.49.410.2 10.2 9.3 -18.110.2 -0.5 -0.5 -0.5 -1.5 0.4 -0.6 -0.5 -0.5 -0.5 5.9 6.0 0 12.1 11.9 11.97.8 0 1.2 0 0.7 1.2 C D AC 12.8V CIRCUIT CHANGES BY MARKET. X : NOT USED O : USED TM1661S-L Point C(Pin 1 of CB201) V : 50V/divH : 10 sec/div DC range1 : 1 probe 0V Point D(Pin 1 of CB202) V : 10V/divH : 10 sec/div DC range1 : 1 probe 0V T1T2 G T1T2 G 15 P14 D-6 P14 H-6 P14 I-6 YST-SW800 YST-SW800 16 ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS : C.A.EL.CHP: CHIP ALUMI. ELECTROLYTIC CAP C.CE: CERAMIC CAP C.CE.ARRAY: CERAMIC CAP ARRAY C.CE.CHP: CHIP CERAMIC CAP C.CE.ML: MULTILAYER CERAMIC CAP C.CE.M.CHP: CHIP MULTILAYER CERAMIC CAP C.CE.SAFTY: RECOGNIZED CERAMIC CAP C.CE.TUBLR: CERAMIC TUBULAR CAP