Yamaha-YSTRSW300-sub-sm(1) 维修电路原理图.pdf

I CONTENTSTO SERVICE PERSONNEL . 2REAR PANELS . 34SPECIFICATIONS. 45INTERNAL VIEW . 5DISASSEMBLY PROCEDURES . 67CHECKS AND ADJUSTMENTS. 89BLOCK DIAGRAM. 10PRINTED CIRCUIT BOARDS. 1112SCHEMATIC DIAGRAM . 13REPLACEMENT PARTS LIST . 1519IMPORTANT NOTICEThis 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 expensivecomponents, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service requiredshould 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 applicabletechnical 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 arecontinually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation toretrofit. 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 theground 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.P.O.Box 1, Hamamatsu, JapanYST-RSW300 2007 All rights reserved.This manual is copyrighted by YAMAHA and may not be copied orredistributed either in print or electronically without permission.Status indicator101052SERVICE MANUALSUBWOOFER SYSTEMYST-RSW300 07.04RadioFans.CN 收音机爱 好者资料库YST-RSW3002YST-RSW300WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLE1. Critical Components InformationComponents having special characteristics are marked sand must be replaced with parts having specifications equalto those originally installed.2. Leakage Current Measurement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohms shuntedby 0.15F.For U model“CAUTION”“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 6A,125V FUSE.”For C modelCAUTIONF1:REPLACE WITH SAME TYPE 6A, 125V FUSE.ATTENTIONF1:UTILISER UN FUSIBLE DE RECHANGE DE MME TYPE DE 6A, 125V.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.I TO SERVICE PERSONNELWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (whereapplicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (andpossibly 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 exposeeyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands beforehandling food.All of the P.C.B.s installed in this unit and solder joints are soldered using the lead free solder.Among some types of lead free solder currently available, it is recommended to use one of the following types for the repairwork. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth)Caution: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 sureto use a soldering iron suitable to each solder.About lead free solderRadioFans.CN 收音机爱 好者资料库YST-RSW3003YST-RSW300I REAR PANELSU, C modelsR modelK modelA modelYST-RSW3004YST-RSW300B, G modelsL modelI SPECIFICATIONSType. Advanced Yamaha Active Servo Technology IIOutput Power (100 Hz, 5 ohms, 10% T.H.D.) . 250 WDynamic Power (5 ohms). 270 WInput Sensitivity (50 Hz, 250 W/5 ohms, L+R)INPUT1 (SP) . 1.0 VINPUT2 (PJ). 50 mVInput ImpedanceINPUT1 (SP) . 2.2 k-ohmsINPUT2 (PJ). 12 k-ohmsFrequency Response . 20 Hz to 160 HzDriver.25 cm (10) cone woofer,Magnetic shielding typeInput SectionINPUT1 .Speaker terminalINPUT2 . RCA pin jackOperation SectionFront panel. STANDBY/ON keyVOLUME controlHIGH CUT controlStatus indicatorRear panel . POWER ON/OFF keyAUTO STANDBY (HIGH / LOW / OFF) keyPHASE (NORM / REV) keyVOLTAGE SELECTOR key (R, L models)Power SupplyU, C models . AC 120 V, 60 HzR, L models.AC 110/120/220/230-240 V, 50/60 HzK model . AC 220 V, 60 HzA model . AC 240 V, 50 HzB, G models . AC 230 V, 50 HzPower Consumption. 80 WStandby Power Consumption. 0.5 W (Reference data)Dimensions (W x H x D). 372 x 400 x 428.2 mm (14-5/8 x 15-3/4 x 16-7/8)Weight . 20 kg (44 lbs. 1oz.)FinishCherry color . U, C, R, K, A, B, G, L modelsBlack color . U, C, R, K, A, B, G, L modelsAccessories. Nonskid pad x 4* Specifications are subject to change without notice due to prod-uct improvements.U . U.S.A. modelC . Canadian modelR . General modelK . Korean modelA . Australian modelB . British modelG . European modelL . Singapore modelYST-RSW3005YST-RSW300DIMENSIONS400 (15-314) 372 (14-5/8) 428.2 (16-7/8) 372 (14-5/8) 26.6(1-1/16)29.6(1-3/16)Unit: mm (inch)I INTERNAL VIEW12378A096541234567890AMAIN (8) P.C.B.MAIN (4) P.C.B.MAIN (2) P.C.B.MAIN (1) P.C.B.MAIN (10) P.C.B.MAIN (3) P.C.B.MAIN (6) P.C.B.POWER TRANSFORMERMAIN (11) P.C.B.(U, C, K, A, B, G models)MAIN (7) P.C.B.(R, L models)MAIN (9) P.C.B.(R, L models)MAIN (5) P.C.B.Advanced YST IIAdvanced Yamaha Active Servo Technology II is aunique system to let the speaker unit have a perfectlylinear motion by the speaker and amplifier combination.YST-RSW3006YST-RSW300I DISASSEMBLY PROCEDURESFig. 11. Removal of Front Grille Assy*The front grille assy is fixed to the cabinet with dow-els at 5 locations.As a flatblade screwdriver is used for removal, usespecial care not to cause damage to the cabinetassy.a. Using the flatblade screwdriver inserted in the gap be-tween the front grille assy and the cabinet assy (bot-tom 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-dry-ing bond or the like to dowels and then fit them intodowel holes for secure installation. (The front grilleassy will come off easily if its dowels are fitted intodowel holes without applying quickdrying bond orthe like.)2. Removal of Drivera. Remove 4 screws (1)and then remove the driver.(Fig. 1)b. Disconnect the connector connected to the terminal ofthe driver. (Fig. 1)Rubber sheet and clothCabinet assyBottom sideBottom sideTerminalTerminalTerminal1DriverFront grille assyConnectorDowelsDowelsMetalbladeFlatblade screwdriver(Remove parts in the order as numbered.)Disconnect the power cable from the AC outlet.Spread a rubber sheet and cloth, then place the main unit upside down on it.YST-RSW30074KnobFront panelFront panelCB9Switch cover assyKnob holeL-shaped metal part or the like5CableBushWhen Checking the P.C.B.:Connect all the connectors removed during disassem-bly back to the original positions.Spread cloth first and place the rear panel assy andswitch cover assy on it. (Fig. 4)Fig. 44. Removal of Front Panel Assy*The front panel once removed cannot be reused.Be sure to use a new front panel for replacement.Before installing the new front panel, be sure to removethe double sided adhesive tape remaining from the oldfront panel completely.a. Remove 2 knobs (4). (Fig. 3)b. Insert L-shaped metal parts or the like into the volumeknob hole and high-cut knob hole in the front panel andpull the panel gradually away from the cabinet to re-move it.Fig. 3c. Remove 2 screws (5). (Fig. 3)d. Pull out the switch cover assy. (Fig. 3)e. Remove bush. (Fig. 3)*The bush once removed cannot be reused. Be sureto use a new bush for replacement.f. Remove the switch cover assy together with the cable/CB9. (Fig. 3)3. Removal of Rear Panel Assya. Remove 8 screws (2). (Fig. 2)*Screws (2) are identified with arrow marks ().b. Pull out the rear panel assy together with the cover.(Fig. 2)c. Remove bush. (Fig. 2)*The bush once removed cannot be reused. Be sureto use a new bush for replacement.Fig. 2d. Remove 2 screws (3). (Fig. 2)*Screws (3) are identified with arrow marks ().e. Remove the cover. (Fig. 2)f. Disconnect the connectors (CB9 and CB10). (Fig. 2)Rear panel assy2332to CB4BushCoverto CB10to CB9Bottom sideRubber sheet and clothRubber sheet and clothRear panel assySwitch cover assyYST-RSW3008I CHECKS AND ADJUSTMENTSDevices requiredSignal generator8-ohm or 6-ohm load resistorOscilloscope (dual trace type)Connection1) Connect the output signal from the signal genera-tor to the input terminal of the main unit.2) Disconnect the connector terminal connected tothe speaker unit and reconnect it to the load resis-tor.3) Connect the HOT side of the oscilloscope CH1probe to the point A or B indicated in the figure andthe GND side to the GND of the main unit. (Fig. 1)4) Connect the oscilloscope CH2 input to the red sideof the connector cable, which is connected with theload resistor.At this time, the GND terminal of CH2 must be leftunconnected.V: 20 V/divH: 2 msec/divDC range1 : 1 probeG Confirmation of power amplifier operationFor the power amplifier which has been repaired, it is absolutely necessary to confirm that a correct waveform is obtainedat points indicated by A and B in the schematic diagram according to the following procedure.Setting1) Set the signal generator to the sine wave, 100 Hzand minimum output level settings.2) Set the volume of the main unit to the minimum po-sition.3) Turn on the power to the main unit.4) Adjust the output level of the signal generator andthe volume of the main unit so that the output levelobserved at oscilloscope CH2 is 26 Vp-p to 28 Vp-p.Waveform observationWith the settings made as described above, observethe waveform obtained at CH1 for judgment.Point A (Cathode of D29/D30)V: 20 V/divH: 2 msec/divDC range1 : 1 probePoint B (Anode of D27/D28)G Idling adjustmentTo stabilize operation of the amplifier, turn ON the power with no input signal and wait for 2 to 3 minutes in non loadedcondition before the adjustment.Confirm that the voltage across the terminals TP1 and TP2 is 20 mV to 350 mV.If it exceeds 350 mV, open (cut off) R136.Attention:If the idling current exceeds 350 mV after a power amplifier repair, check for a defective component before cutting theresistor.DRIVERWOOFERPSAMPPSAMPPOWERDRIVEPOWERDRIVEPS AMPPS AMPAD29D30D29D30D28D27D28D27R136TP2DC 20 mV to 350 mVDC 20 mV to 350 mVBTP1D30D29D30GNDD29D27D28D27D28TP2R136TP1BDC 20 mV to 350 mVAFig. 1MAIN (1) P.C.B.26-28 Vp-p26-28 Vp-pYST-RSW3009G Confirmation of AUTO STANDBY operation setting1) Turn off the “POWER ON/OFF” key located on the rear panel.2) In order to shorten the time required for operation check; connect a 10 k-ohms resistor at both ends of R45 on theMAIN (2) P.C.B. (Fig. 2)3) Connect the output signal from the signal generator to the INPUT 2 / L/MONO terminal of the main unit.4) Set the signal generator for the sine wave of 100 Hz, 8 mV.5) Turn on the “POWER ON/OFF” key located on the rear panel.2) Turn on the “STANDBY/ON” key.The status indicator lights up (green) and its colorchanges to red after 2 to 8 seconds.3) Turn off the “STANDBY/ON” key.The status indicator goes off.5) Turn on the “STANDBY/ON” key.The status indicator lights up (green) and its colorremains unchanged even after time have elapsed.6) Turn off the “STANDBY/ON” key.The status indicator goes off.Confirmation1) Set the “AUTO STANDBY” key to the LOW posi-tion.4) Set the “AUTO STANDBY” key to the HIGH posi-tion.After confirmation1) Turn off the “POWER ON/OFF” key.2) Disconnect the 10 k-ohms resistor connected to both ends of R45.R4510 k-ohmsR4510 k-ohms2ABCDEFGHIJ13457YST-RSW300610+PROTECTIONQ26-28F1RY2RY2R60(U, C, K, A, B, G models)POWER ON/OFFSW5SUBPOWER SUPPLYD3T1(R, L models)REGULATORQ5, Q8REGULATORIC202STANDBY/ONSW4Q13+12-12IC6IC1REGULATOR+B-BPOWER SUPPLYD25POWER SUPPLYD2PROTECTIOND201D202D203RGRY10.1DRIVERWOOFERPOWERTRANSFORMERAC INSTATUSINDICATOR-B+BPS AMPPS AMPQ22C, Q24AQ22A, Q24CPOWER DRIVEQ17A, Q17CPRE DRIVEQ3-15+A.N.I.C.IC8LIMITERQ10, Q12AUTO STANDBY CIRCUITC2784673+Q1TIMERIC201MUSICSENSORIC4OFFOFFLOWHIGHLOWHIGHAUTO STANDBYSW2INPUT 2OUTPUTL/MONORLRLR+INPUT 1IC11AIC11B361527NORMREVIC10A5k-ohms786SW1PHASESELECTL.P.F.6dB/octVR1VOLUMEIC7A8IC7B43267L.P.F.12dB/octH.P.F.12dB/octHIGH CUT40-140HzVR2+C76C77+C45+C46C40C41+Q16, Q19Q30-33I BLOCK DIAGRAMYST-RSW30011ABCDEFGHIJ1234567I PRINTED CIRCUIT BOARDSIC10W3IC201IC4IC11PJ1CB9CB3W2CB1IC6IC1W6A1W6A2W6A3IC8CB10CB11IC10W3IC201IC4IC11PJ1MAIN (3) P.C.B.MAIN (1) P.C.B.MAIN (10) P.C.B.MAIN (6)(W6B1, W6B2, W6B3)BEBLBEMAIN (6)(W5B1, W5B2, W5B3)REBLREDRIVERWOOFERINPUT1/OUTPUT+RL+L /MONO / ROFFREVNORMHIGHLOW-INPUT 2AUTOSTANDBYPHASEMAIN (4) (CB4)VCCPWS-12+12COM OUTININOUTCOM+V2MAINEPWSTOVL-12+12TOVLEPWS+V1-12+12TOVLE+V1MAIN (2) (W1)E+V1VCCRY-RY+OCD-12SPEMAINE+12RY+SPERY-SP+SP-+-12+12OCDEMAIN119118458919Semiconductor LocationRef no.LocationRef no.LocationD2I3D4E3D5F6D6E5D8E5D10H6D11H6D13E5D14E6D15H6D16F6D17H5D18F6D19H6D20H6D21H6Ref no.LocationRef no.LocationRef no.LocationD22F6D23F6D24F6D25J5D27G6D28G6D29G6D30G6D31G3D32E6D33E6D34E6D202H3D203H3D204H3IC1I3IC4B4IC6I3IC8E6IC10B2IC11B5IC201C3Q1C3Q3F6Q4F6Q6F6Q7F6Q9F6Q10E5Q11G6Q12E5Q14G6Q15F6Q16I2Q17AE4Q17CH4Q19I2Q20F4Q21G5Q22AF5Q22CH5Q24AG4Q24CF4Q26G3Q27G3Q28G3Q29F3Q30F3Q31G3Q32H3Q33F3Ref no.Location2ABCDEFGHIJ13457YST-RSW300612W1IC202CB7CB8W9AW12AW11AW8AW5B3W6B1W6B2W6B3W5B1W5B2W16BW7BW10BW9BW15BW14BW13BW8BW16AW13ACB5W14AW10AW15AW7ACB6CB4W4AIC7W12BW11BW4BW8BW9BW5B3W6B1W6B2W6B3W5B1W5B2GRMAIN (2) P.C.B.MAIN (6) P.C.B.MAIN (6) P.C.B.MAIN (8) P.C.B.MAIN (11) P.C.B.MAIN (7) P.C.B.MAIN (9) P.C.B.MAIN (4) P.C.B.MAIN (5) P.C.B.MAIN (10) (CB9)MAIN (10) (CB1)MAIN (10)(W6A1, W6A2, W6A3)MAIN (2)(W5A1, W5A2, W5A3)VCC17PWS-12+12+2VMAINETOVLVCC+1VEVCCPWSLEDRLEDGE1VCCPWSLEDRLEDGE1VOLTAGESELECTORAC INSTANDBY/ONSTATUS INDICATORPOWERTRANSFORMERPOWERTRANSFORMERVOLUMEHIGH CUT01040Hz140HzR, L modelsR, L modelsR, L modelsREBEORGYBEWHYEBEBLVoltage230-240V220V110V20V1-2, 5-62-3, 6-73-4, 7-84-5, 8-9SelectBRREGRORGYBEGRBRYEBLREWHWHBEBLREBEBLBER, L modelsU, C, K, A, B, G modelsU,