YAMAHA YST-SW012 维修电路原理图.pdf
I CONTENTS TO SERVICE PERSONNEL . 2 SPECIFICATIONS. 3 INTERNAL VIEW . 4 REAR PANELS . 56 DISASSEMBLY PROCEDURES . 78 BLOCK DIAGRAM. 8 PRINTED CIRCUIT BOARD . 9 SCHEMATIC DIAGRAM . 10 PARTS LIST. 1115 2005 All rights reserved. This manual is copyrighted by YAMAHA and may not be copied or redistributed either in print or electronically without permission. SUBWOOFER SYSTEM YST-SW012 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 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. YST-SW012 05.12 100994 P.O.Box 1, Hamamatsu, Japan SERVICE MANUAL YST-SW012 2 YST-SW012 WALL OUTLET EQUIPMENT UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE I TO SERVICE PERSONNEL 1. Critical Components Information Components having 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 insulated from supply circuits. GMeter impedance should be equivalent to 1500 ohms shunted by 0.15F. “CAUTION” “F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A, 125V FUSE.” CAUTION F1: REPLACE WITH SAME TYPE 1.6A, 125V FUSE. ATTENTION F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 1.6A, 125V. 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 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. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. About Lead Free Solder Side A Side B SMT REFLOW Process MI FLOW Process Solder Dip Among some types of lead free solder currently available, it is recommended to use one of the following types for the repair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth) Caution: 1. As the melting point temperature of the lead free solder is about 30C to 40C (50F to 70F) higher than that of the lead solder, be sure to use a soldering iron suitable to each solder. 2. If lead solder must be used, be sure to remove lead free solder from each terminal section of the parts to be replaced and from the area around it completely before soldering, or make sure that the lead free solder and lead solder melt together fully. The P.C.B.s installed in this unit are soldered using the following solder. MAIN P.C.B. Side A Side B Lead Free Solder YST-SW012 3 YST-SW012 I SPECIFICATIONS Type.Advanced Yamaha Active Servo Technology II Output Power . 50 W (100 Hz, 5 ohms 10% T.H.D) Input Sensitivity.50 mV (50 Hz, 50 W / 5 ohms) Dynamic Power . 100 W, 5 ohms Input Impedance . 12 k-ohms Frequency Response .28 Hz to 200 Hz Driver . 20cm (7-7/8) Cone Woofer Magnetic Shielding Type Input Section INPUT . RCA Pin jack Operation Section Power Switch, Volume Control, LED indicator Power Supply U, C models .AC 120 V, 60 Hz R, T, K, L models .AC 110-120 / 220-240 V, 50 / 60 Hz A model .AC 240 V, 50 Hz B, G models .AC 230 V, 50 Hz Power Consumption . 45 W Dimensions (W x H x D) .290 x 290 x 327.5 mm (11-7/16 x 11-7/16 x 12-7/8) Weight .8.5 kg (18 lbs. 11 oz.) Finish Silver color . U, C, R, T, K, A, B, G, L models Black color.U, C, R, T, A, B, G, L models Cherry color.R, T, K, A, B, G, L models Advanced YST II This subwoofer system employs Advanced Yamaha Active Servo Technology II which Yamaha has developed for reproducing higher quality super-bass sound. This super bass sound adds a more realistic, theater-in-the-home effect to your stereo system. 290 (11-7/16) 290 (11-7/16)290 (11-7/16) 327.5 (12-7/8) 12.5 (1/2) 25 (1) DIMENSIONS Unit: mm (inch) Accessories Nonskid pad x 4, Subwoofer Cable (5m) x 1 *Specifications are subject to change without notice due to product improvements. U . U.S.A. modelC . Canadian model R . General modelT. Chinese model K . Korean modelA . Australian model B . British modelG . European model L . Singapore model YST-SW012 4 YST-SW012 I INTERNAL VIEW 12 46753 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 2 3 4 5 6 7 YST-SW012 5 YST-SW012 T model I REAR PANELS R modelU, C models K model Power IndicatorPower Indicator Power IndicatorPower Indicator YST-SW012 6 YST-SW012 A modelB, G models L model Power IndicatorPower Indicator Power Indicator YST-SW012 7 YST-SW012 I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet. 1. Removal of Front Grille Assy *The Front Grille Assy is fixed to the cabinet with dowels at 5 locations. As a flatblade screwdriver is used for removal, use special care not to cause damage to the Cabinet Assy. a. Using the flatblade screwdriver inserted in the gap between the Front Grille Assy and the Cabinet Assy (bottom side first), push up the Front Grille Assy. (Fig.1) b. Remove the Front Grille Assy by lifting a metalblade up. (Fig.1) *When installing the Front Grille Assy, apply quick-drying bond or the like to dowels and then fit them into dowel holes for secure installation. (The Front Grille Assy will come off easily if its dowels are fitted into dowel holes without applying quick- drying bond or the like.) 2. Removal of Driver a. Remove 4 screws (1) and remove the Driver. (Fig.1) b. Disconnect the connector connected to the terminal of the Driver. (Fig. 1) 3. Removal of Rear Panel Assy a. Remove 8 screws (2) and remove the Rear Panel Assy. (Fig.1) *Screws (2) are identified with arrow marks ( ). Fig. 1 1 2 2 Rear Panel Assy Cabinet Assy Front Grille Assy Flatblade screwdriver Metalblade Dowel Dowel Driver Connector YST-SW012 8 YST-SW012 I BLOCK DIAGRAM VR1 VOLUME IC4A - + + IC5A IC5B IC1 2 3 4 - - + - L.P.F. 6dB/oct L.P.F. 12dB/oct H.P.F. 12dB/oct DRIVER INPUT PJ1 POWER AMP RY1 PROTECTION POWER SUPPLY D1 F1 T1 POWER SW5 4 8 2 26 1 9 8 10 +B +B -B -B IC6 Q5, 6 D4, 5, 22, 23 Q17- 20 D7, 25 R28 0.1 +15 -15 Q9, D2 REGULATOR Q10, D3 A.N.I.C LIMITER Fig. 2 When Checking the P.C.B. Connect all the connectors removed during disassembly back to the original positions. Spread the Rubber Sheet and Cloth for insulation purpose and place the Rear Panel Assy on the Rubber Sheet and Cloth. (Fig. 2) ? ? ? ? YST-SW012 9 A 1 2 3 4 5 6 7 BCDEFGHIJ VOLUME 10 0 INPUT MAIN (3) P.C.B.(Side A) Circuit No.U, C, T, R, A, LK, B, G C78XO J42XO L1XO DRIVER AC IN MAIN (1) P.C.B. POWER MAIN (5) P.C.B. BE BE BE WH YE YE RE RE BR BR U, C, A, B, G models R, T, K, L models MAIN (7) P.C.B. MAIN (10) P.C.B. (Side A) MAIN (9) P.C.B. (Side A) MAIN (2) P.C.B. WHBE BE WH BE WH BE WH U, C, A, B, G models R, T, K, L modelsR, T, K, L models VOLTAGE SELECTOR 220V-240V110V-120V RE RE RE RE BL RE RE BL BL WH SP- SP+ RE Ref. no.Location D1J2 D2H4 D3I4 D4H2 D5H2 D6G2 D7F2 D8C3 D22G2 D23G2 Semiconductor Location Ref. no.Location D24J3 D25F3 D28I3 D29I3 IC1H2 IC4B3 IC5B2 IC6G3 Q1F3 Q2F3 Ref. no.Location Q5G3 Q6G3 Q9H4 Q10I4 Q17F3 Q18F3 Q19F3 Q20F3 1 9 19 1 19 10 -V -15 +15 E MAIN -V -15 +15 E MAIN POWER INDICATOR (Side A)(Side A) (Side A) (Side A) ON OFF I PRINTED CIRCUIT BOARD Lead Free Solder Used 2 ABCDEFGHIJ 1 3 4 5 7 YST-SW012 6 10 I SCHEMATIC DIAGRAM # All voltages are measured with a 10MV DC electronic volt meter. # Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. # Schematic diagram is subject to change without notice. IC1: STK404-070 60W AF Power Amp 13245678910 R1 R4 R5 C1 C2 D1 TR3 TR5 R3R6 TR4 SUB R2 TR1 TR2 TR6 TR7 TR8 1 10 STK404-070 60W 1 9 PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. 2SB1642 2SD2531 1SR139,400 1SS133,176 MTZJ15C MTZJ24B MTZJ5.6B 2SA970 2SC2240 2SC2878 PC4570HA-A Anode Cathode EC B BCE RBV-402 IC46: PC4570HA-A Dual OP-Amp VccVo1-Vm1+Vm1VEE+Vm2-Vm2Vo2Vcc 123456789 +- 12 + -35.2 AC 52.0 0.2 0.2 0.2 0.2 0.2 0 0 0 0 0 0 0.2 0.2 35.0 35.0 35.1 -8.1 0 0 0 0 14.5-14.5 0 0 0 0 0 15.0 29.4 29.4 -30.7 35.0 14.5 -15.1 -14.5 -29.5-29.6 0 0 23.6 1.3 0.1 -8.0 1.3 1.3 1.3 0 0.7 0.70.8 0 0 0.2 0.2 0.2 -34.9 -35.2 35.1 0 0 1.1 -1.1 1.7 14.5 0 0 0 -1.9 0 14.5 14.5 -14.6 -14.6 0 0 0 0 0 0 0 0 0 L.P.F. L.P.F. DRIVER R, T, K, L models MAIN (1)MAIN (3) MAIN (10) MAIN (7) MAIN (5) MAIN (2) MAIN (9) VOLUME H.P.F. POWER AMP A.N.I.C LIMITER PROTECTION POWER SUPPLY REGULATOR POWER INPUT U, C, A, B, G models YST-SW012 11 YST-SW012 ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS: PARTS LIST I ELECTRICAL PARTS 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 C.CE.SMI: SEMI CONDUCTIVE CERAMIC CAP C.EL: ELECTROLYTIC CAP C.MICA: MICA CAP C.ML.FLM: MULTILAYER FILM CAP C.MP: METALLIZED PAPER CAP C.MYLAR: MYLAR FILM CAP C.MYLAR.ML : MULTILAYER MYLAR FILM CAP C.PAPER: PAPER CAPACITOR C.PLS: POLYSTYRENE FILM CAP C.POL: POLYESTER FILM CAP C.POLY: POLYETHYLENE FILM CAP C.PP: POLYPROPYLENE FILM CAP C.TNTL: TANTALUM CAP C.TNTL.CHP: CHIP TANTALUM CAP C.TRIM: TRIMMER CAP CN: CONNECTOR CN.BS.PIN: CONNECTOR,BASE PIN CN.CANNON: CONNECTOR,CANNON CN.DIN: CONNECTOR,DIN CN.FLAT: CONNECTOR,FLAT CABLE CN.POST: CONNECTOR,BASE POST COIL.MX.AM: COIL,AM MIX COIL.AT.FM: COIL,FM ANTENNA COIL.DT.FM: COIL,FM DETECT COIL.MX.FM: COIL,FM MIX COIL,OUTPT: OUTPUT COIL DIOD.ARRAY : DIODE ARRAY DIODE.BRG: DIODE BRIDGE DIODE.CHP: CHIP DIODE DIODE.VAR: VARACTOR DIODE DIOD.Z.CHP: CHIP ZENER DIODE DIODE.ZENR : ZENER DIODE DSCR.CE: CERAMIC DISCRIMINATOR FER.BEAD: FERRITE BEADS FER.CORE: FERRITE CORE FET.CHP: CHIP FET 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 COUPLER PHOT.INTR: PHOTO INTERRUPTER PHOT.RFLCT : PHOTO REFLECTOR PIN.TEST: PIN,TEST POINT PLST.RIVET: PLASTIC RIVET R.ARRAY: RESISTOR ARRAY R.CAR.: CARBON RESISTOR R.CAR.CHP: CHIP RESISTOR R.CAR.FP: FLAME PROOF CARBON RESISTOR R.FUS: FUSABLE RESISTOR R.MTL.CHP: CHIP METAL FILM RESISTOR R.MTL.FLM: METAL FILM RESISTOR R.MTL.OXD: METAL OXIDE FILM RESISTOR R.MTL.PLAT: METAL PLATE RESISTOR RSNR.CE: CERAMIC RESONATOR RSNR.CRYS: CRYSTAL RESONATOR R.TW.CEM: TWIN CEMENT FIXED RESISTOR R.CEMENT: CEMENT RESISTOR SCR.BND.HD : BIND HEAD B-TITE SCREW SCR.BW.HD: BW HEAD TAPPING SCREW SCR.CUP: CUP TITE SCREW SCR.TERM: SCREW TERMINAL SCR.TR: SCREW,TRANSISTOR SUPRT.PCB: SUPPORT,P.C.B. SURG.PRTCT : SURGE PROTECTOR SW.TACT: TACT SWITCH SW.LEAF: LEAF SWITCH SW.LEVER: LEVER SWITCH SW.MICRO: MICRO SWITCH SW.PUSH: PUSH SWITCH SW.RT.ENC: ROTARY ENCODER SW.RT.MTR: ROTARY SWITCH WITH MOTOR SW.RT: ROTARY SWITCH SW.SLIDE: SLIDE SWITCH TERM.SP: SPEAKER TERMINAL TERM.WRAP : WRAPPING TERMINAL THRMST.CHP : CHIP THERMISTOR TR.CHP: CHIP TRANSISTOR TR.DGT: DIGITAL TRANSISTOR TR.DGT.CHP : CHIP DIGITAL TRANSISTOR TRANS: TRANSFORMER TRANS.PULS : PULSE TRANSFORMER TRANS.PWR: POWER TRANSFORMER ASSY TUNER.AM: TUNER PACK,AM TUNER.FM: TUNER PACK,FM TUNER.PK: FRON
