YAMAHA YST-MS50 维修电路原理图.pdf
SERVICE MANUAL I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . .1 FRONT AND REAR PANELS . . . . . . . . . . . . . . . 1 2 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . . . .5 100778 SERVICE MANUAL YST-MS50(M) POWERED MULTIMEDIA SPEAKERS PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 6 8 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . .10 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 15 PARTS LIST FOR CARBON RESISTORS . . . . . . . .16 The contents of this Service Manual are applicable to the products with serial numbers of Z200001 and up. YST-MS50(M) 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, inevita- ble 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 BASS 010 SPEAKERS MULTIMEDIA POWERED YST-MS50 POWERED MULTIMEDIA SPEAKERS VOLUME YST-MS50(M) YST-MS50(M) 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 I FRONT AND REAR PANELS GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. M Satellite Speakers Front PanelM Satellite Speakers Rear Panel LchRchLchRch “CAUTION” “F1 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2.0A, 250V FUSE.” CAUTION F1 : REPLACE WITH SAME TYPE 2.0A, 250V FUSE. ATTENTION F1 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2.0A, 250V. A V YST-MS50(M) YST-MS50(M) M Subwoofer Front Panel 2 M Subwoofer Rear Panel U and C modelsA modelB and G models YST-MS50(M) YST-MS50(M) ISPECIFICATIONS Type . Advanced Active Servo Technology Output Power Satellite. 20W+20W (1kHz, 4 ohms at T.H.D.=10%) Subwoofer . 40W (100Hz, 5 ohms at T.H.D.=10%) Input Sensitivity .200mV (1kHz, 4 ohms at 20W) Input Impedance . 25 kohms Frequency Response . 32 Hz to 20 kHz Driver Satellite Tweeter. 19mm (3/4) balanced dome Magnetic shielding type Midrange. 8cm (3) cone Magnetic shielding type Subwoofer. 16cm (6-1/2) cone Magnetic shielding type Power Consumption . 65 W Power Supply U, C models .AC120V, 60 Hz A model .AC240V, 50 Hz B, G models .AC230V, 50 Hz Dimensions (W X H X D) Satellite. 97 x 159 x 178 mm (3-13/16 x 6-1/4 x 7) Subwoofer . 350 x 210 x 321 mm (13-3/4 x 8-1/4 x 12-5/8) Weight Satellite. 0.7 kg (1 lbs. 9 oz) x 2 Subwoofer . 8 kg (17 lbs. 10 oz) Finish . White color Black color Accessories 3.5mm stereo mini plug cable (1.8m) x 1 RCA pin plug cable (1.8m) x 1 8 pin plug cable (1.8m) x 1 8 pcs of nonskid pad x 1set * Specifications subject to change without notice. G Satellite Speaker U . . . . . . . . . . . . . USA model C . . . . . . . . . Canadian model A . . . . . . . . Australian model B . . . . . . . . . . . British model G . . . . . . . . .European model 3 Unit : mm (inch) G DIMENSIONS 97 (3-13/16) 178 (7) 166(6-17/32) 159 (6-1/4) G Subwoofer 210 (8-1/4)321 (12-5/8) 350 (13-3/4) YST-MS50(M) YST-MS50(M) IINTERNAL VIEW 4 M Satellite Speakers M Subwoofer wqe r yu t Note:The Satellite Speakers are available by the speaker unit (L ch or R ch). Individual parts of the Satellite Speakers are not available. (See page 14 and 15 of the PARTS LIST.) Satellite Speaker (L ch) qMAIN (B) P.C.B. Satellite Speaker (R ch) wMAIN (C) P.C.B. eMAIN (D) P.C.B. LchRch Subwoofer rMAIN (E) P.C.B. tMAIN (A) P.C.B. ySPEAKER UNIT (Subwoofer) uMAIN (F) P.C.B. YST-MS50(M) YST-MS50(M) IDISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) Fig. 2 Fig. 1 G Disassemble of the Subwoofer 1. Removal of the Rear Panel Assy. a.Remove 8 screws ( q ) in Fig. 1, and remove the rear panel assy. *Arrow marks ( ) are printed to identify the screws to be removed. b.Disconnect one connector in Fig. 1. c.Disconnect the Speaker cord in Fig. 1. *When assembling the Rear Panel Assy, check to ensure that the packing is not damaged so as to prevent air leak- age from occurring. 2. Removal of the Front Panel Assy The front panel assy is fixed to the cabinet with 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.Using the screwdriver insert in the gaps between the front panel assy and cabinet (bottom side first), push up the front panel assy. b.Remove the front panel assy while taking it out. (Front panel assy can not to remove completely.) 3. Removal of the Speaker a. Set up the front panel assy in the direction of the arrow, in Fig. 2. b.Remove 4 screws ( w ) in Fig. 2, and remove the speaker. Dowels Front Panel Assy Cabinet Connector Gaps Speaker Cord Rear Panel Assy Speaker Front Panel Assy q w 5 ABCDEFGH 1 2 3 4 5 6 YST-MS50(M) 67 MAIN ( A ) P. C. B. TO : SPEAKER (WOOFER) FROM : POWER CORD WH BE FROM : MAIN ( F ) FROM : MAIN ( E ) TO RIGHT SPEAKER TO LEFT SPEAKER RE WH WH: U, C BE: A, B, G BL: U, C BR: A, B, G MAIN ( E ) P. C. B. BASS TO : MAIN ( A ) MAIN ( F ) P. C. B. POWER WH BE TO : MAIN ( A ) MAIN ( B ) P. C. B. TO SUB Wo. L + 2.2 SPEAKER (MIDRANGE) SPEAKER (TWEETER) BL RE RE I PRINTED CIRCUIT BOARD (Component side) M Satellite Speaker (L ch) M Subwoofer Ref. No.Location D2B2 D3F3 D4F2 D5E2 D6E3 D7E3 D8E3 Ref. No.Location IC1F2 IC2E3 IC4C2 IC5C2 IC6E2 IC7E3 G Semiconductor Location Ref. No.Location Q3F3 Q4F2 Q5E2 Q6F2 Q7E2 Q8E2 ABCDEFGH 1 2 3 4 5 6 YST-MS50(M) I BLOCK DIAGRAM 89 MAIN ( C ) P. C. B. TO : MAIN ( D ) VOLUME (HEADPHONE)(POWER) 2 1 7 5 8 4 3 6 MAIN ( D ) P. C. B. TO SUB Wo. INPUT2 INPUT1 R + + 2.2 SPEAKER (MIDRANGE) SPEAKER (TWEETER) RE BL RE FROM : MAIN ( C ) Q2 Q3 Q8 SW1 POWER SW2 F1 D2 IC4 GND IN + OUT IC5 GND INOUT POWER TRANSFORMER Regulator (POWER) Q1 3 5 VOLUME VR1 VR2 IR JK4 INPUT 1 INPUT 2 JK3 Rch SATELLITE SPEAKER Lch SATELLITE SPEAKER IL 3 1 G 4 76 JK2 8 2 5+12 +12 +12 PWS TO SUB Wo. TO LEFT SPEAKER TO RIGHT SPEAKER OL 1 7 IC3 (NJM4556AL) OR RSP RSP+ TWEETER MIDRENGE + + JK1 (HEADPHONE) TWEETER MIDRENGE + + SUBWOOFER SP+ SP E 12 3 1 G 4 768 2 5 +12 E OL PWS OR RSP RSP+ JK5 12 12 3 5 12 12 +12 +12 1 7 H. P. F 12dB/oct H. P. F 12dB/oct 12 +12 6dB/oct 12 +12 12dB/oct EQ Amp IC1,2 (NJM4558D) Mute Power Amp. IC6 (STK408-040E) IC1 IC2IC2 IC1 IC7 IC7 (NJM4558D) +1212 27 20 1 18 +12 16 12 6 +12 7 12 317SWI SRI SLI PWS1 RSP+ LSP+ PJ1 TO SUB Wo. PJ2 16 12 14 9 8 5 3 1 +B B B +B BASS Rectifier Q6Q7 Q5Q4 A. N. I. C ONOFF I PRINTED CIRCUIT BOARD (Component side) M Satellite Speaker (R ch) Ref. No.Location IC3B2 Q1B2 Q2B2 G Semiconductor Location ABCDEFGH 1 2 3 4 5 6 IJK 7 8 YST-MS50(M) 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. 10 IC1, 2, 7 : NJM4558D Dual OP-Amp IC3 : NJM4556AL Dual OP-Amp IN1 2 +IN1 3 VCC 4 +IN2 5 IN2 6 OUT2 7 +VCC 8 OUT1 1 + + IC6 : STK408-040E 3 Channels AF Power Amp 2019181716151413121110987654321 THERMAL SENSOR SUB CH.1 + CH.3 + + CH.2 SUB GND N. C. CH.2 VCC CH.1 VCC CH.1,2,3 +VCC CH.1 OUT CH.2 OUT PRE VCC PRE +VCC CH.1 IN CH.1 NF C. C. C. BIAS CH.2 NF CH.2 IN CH.3 NF CH.3 IN CH.2 VCC CH.3 OUT LIMITER A.N.I.C POWER AMP LPF HPF PHONE AMP POWER SUPPLY 0 0 0 0 0 0 11.7 0 0 0 -11.5 0 0 0 11.411.711.4 10.4 0 0 0 11.7 0 0 0 -11.5 0 0 0 -11.5 0 0 0 11.7 0 -27.1 -0.2 -0.2 -0.1 -0.1 -24.3 -0.1 -0.1 25.6 -25.5 0 0 27.1 -27.1 -27.1 0 0 0 00 0 00 0 0 0 0 0 0 11.7 -11.5 -1.5 0 0 0 0 0 00 0 0 0 0.2 -11.5 0.2 0 11.7 11.7 0 27.1 -11.5 0 -27.1 -27.1 AC43.2 27.1 + + SATELLITE MIDRANGE L ch SATELLITE TWEETER L ch 2.2 + + SATELLITE MIDRANGE R ch SATELLITE TWEETER R ch 2.2 REBL TO SUB Wo. (HEADPHONE) TO RIGHT SPEAKER TO LEFT SPEAKER MAIN (C) VOLUME (POWER) INPUT 2 INPUT 1 WOOFER + MAIN ( D ) RE BL MAIN ( B ) TO SUB Wo. MAIN ( F ) POWERMAIN ( E ) BASS MAIN ( A ) WH RE BE WH BL WH BR BE ONOFF NJM4556AL NJM4558D 1SS133 Anode Cathode B C E 2SA1015 (O, Y) 2SC1815 (Y, GR) 2SC2878 (A, B) RBV-402 D GS NJM78M12FA STK408-040E PIN CONNECTION DIAGRAM OF TRAN- SISTORS, DIODES AND ICS. + 2SK304 (E) 1 20 1: OUTPUT 2: COMMON 3: INPUT 32 1 NJM79M12FA 1:COMMON 2:INPUT 3:OUTPUT32 1 1 4 8 1 8 + OUT1 IN1 VCC +VCC OUT2 1 2 3 45 +IN1IN2 +IN2 + 6 7 8 YST-MS50(M) YST-MS50(M) 11 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 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 Note) Those parts marked with “#” are not included in the P.C.B. assy. 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.WW: WIRE WOUND 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: FRONT-END TUNER PACK VR: ROTARY POTENTIOMETER V
