Yamaha-F20-pwr-sm 维修电路原理图.pdf

SERVICE MANUALHAMAMATSU, JAPAN1.338K-713 K Printed in Japan 2001.09011551GA CONTENTSSPECIFICATIONS . 3PANEL LAYOUT. 3CIRCUIT BOARD LAYOUT. 4BLOCK DIAGRAM . 4DISASSEMBLY PROCEDURE . 5CIRCUIT BOARDS . 7IC BLOCK DIAGRAM. 8INSPECTIONS. 8PARTS LISTOVERALL CIRCUIT DIAGRAMGUITAR AMPLIFIERThis document is printed on chlorine free (ECF) paper with soy ink.RadioFans.CN 收音机爱 好者资料库2F-20IMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed thatbasic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by theusers, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in per-sonal injury, destruction of expensive components and failure of the product to per form as specified. Forthese reasons, we advise all Yamaha product owners that all service required should be performed by anauthorized Yamaha Retailer or the appointed service representative.IMPORTANT:This presentation or sale of this manual to any individual or firm does not constitute authorization, certifica-tion, recognition of any applicable technical capabilities, or establish a principal-agent relationship of anyform.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, andservice departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefor, inevitable andchanges in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, pleasecontact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power tothe unit.WARNING: 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 (and possibly otherentities) 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 REASONWHAT SO EVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes tosolder / flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.IMPORTANT NOTICE FOR THE UNITED KINGDOMConnecting the Plug and CordWARNING:THIS APPARATUS MUST BE EARTHEDIMPORTANT: The wires in this main lead are coloured in accor-dance with the following code: GREEN-AND-YELLOW: EARTH BLUE: NEUTRAL BROWN: LIVEAs the colours of the wires in the main lead of this apparatus may notcorrespond with the coloured markings identifying the terminals in yourplug, proceed as follows:The GREEN-and-YELLOW wire must be connected to the terminal in theplug that is marked with the letter E or the safety earth symbol (or colouredGREEN or GREEN-and-YELLOW).The BLUE wire must be connected to the terminal that is marked with theletter N (or coloured BLACK).The BROWN wire must be connected to the terminal that is marked withthe letter L (or coloured RED).This applies only to products distributed by Yamaha Kemble Music (U. K.) Ltd. WARNINGComponents having special characteristics are marked andmust be replaced with parts having specification equal to thoseoriginally installed.RadioFans.CN 收音机爱 好者资料库3F-20Rated Output Power:20WSpeaker:20cm x 1Controls:VOLUME, GAIN, MASTER VOL., TREBLE, MIDDLE, BASS, CH SELECT switch (A/B)Input/Output Terminals:INPUT, AUX IN, PHONESOutput Impedance:100 (PHONES)Power Consumption:30W/100V (J)25W/120V (UL,CSA)25W/230V (E,BS)Power Requirements:U.S. and Canadian models: 120V, 60HzGeneral model: 230V, 50HzDimensions (W x H x D):357 x 330 x 197mm (14.1 x 13 x 7.8)Weight:6.5kg (14 lbs 5 oz) SPECIFICATIONS PANEL LAYOUT? INPUT? CH SELECT A/B (Channel Select Switch A/B)A Channel? VOLUME* No sound is produced when the VOLUME knob isset to 0.B Channel? GAIN? MASTER VOL.* No sound is produced when the MASTER VOL.knob is set to 0.?Tone Controls? TREBLE? MIDDLE? BASS? AUX IN* Use the volume control on the audio device tocontrol its volume level.? PHONES* The speaker produces no sound when a pair ofheadphones is connected to this jack.? POWER4F-20 CIRCUIT BOARD LAYOUTMAIN 1/2MAIN 1/2MAIN 1/2AC CordPower TransformerMAIN 2/2MAIN 2/2 BLOCK DIAGRAM+B+12V-12V-BOP AMPIC131OP AMPIC231OP AMPIC157OP AMPIC257POWERAMPIC314INPUTCH. SELECT SWCH. ACLEANIC1. IC2CH. ACLEANCH. BDRIVECH. BDRIVE+BVOLUMEGAINMASTERFUSEFZ1INDICATORBASSMIDDLETREBLEPASSIVE TYPETONE CONTROLPOWER SUPPLY CIRCUITPOWER TRANSFORMERVR1VR2VR3VR4VR5VR64 SpeakerPHONESAUX INCN2 4PCN1 2PCN3 3PCN4 5PCN5 5PPOWER SWITCHSW1SW2T2T1T4T1T2GU, C, S, BSMAIN 1/2MAIN 2/2T3+12V-12V+12V-12V+12V-12V+12V-12V+B-BJK3JK2JK1V695450? Top View? Side View? Front View5F-20 DISASSEMBLY PROCEDURE30 x 4SpeakerBPre-Main UnitPre-Main UnitABack Board1.Pre-Main Unit (Time required: about 1 min)1-1Remove the speaker wires.1-2Remove the four (4) screws marked 30. The pre-main unit can then be removed by sliding it backward. (Fig.1)2.Speaker (Time required: about 1 min)2-1Remove the four (4) screws marked A. The back board can then be removed. (Fig.1)2-2Remove the four (4) screws marked B. The speaker can then be removed. (Fig.1)3.MAIN 1/2 Circuit Board (Time required: about 3 min)3-1Remove the pre-main unit. (See procedure 1)3-2Remove the six (6) knobs marked P100 and the six (6) hexagonal nuts marked C. (Fig.5)3-3Remove the hexagonal nuts marked A120 and the hexagonal nuts marked A140. (Fig.5)3-4Push the hooks of the spacer support (at the arrow symbol area of illustration) with a needle-nose plier to unlock.The Main 1/2 circuit board can then be removed. (Fig.2)30: Truss Head Screw 4.0X25 MFZN2BL (VN347600)(Fig. 1)MAIN1/2 Circuit BoardMAIN1/2 Circuit BoardNeedle Nose PlierNeedle Nose PlierMAIN1/2 Circuit BoardP40P40P40Needle Nose Plier(Fig. 2)A: Bind Head Tapping Screw 4.0X25 FCRM3-BL (EI340256)B: Bind Head Screw 4.0X20 ZMC2BL (VB403600)6F-20MAIN 1/2MAIN 2/2P100, CA120P60P70C80A140P70P60P40P40Power Transformer4.MAIN 2/2 Circuit Board (Time required: about 3 min)4-1Remove the pre-main unit. (See procedure 1)4-2Remove the screw marked C80. The MAIN 2/2 circuit board can then be removed. (Fig.5)5.Power Transformer (Time required: about 4 min)5-1Remove the pre-main unit. (See procedure 1)5-2While pushing down the nut marked P70 with a spanner, remove the two (2) screws marked P60. The powertransformer can then be removed. (Fig.4)A120: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060)A140: Hexagonal Nut 12.0 14X2 MFNI33 (ES200210)C80: Bind Head Tapping Screw-1 3.0X16 MFZN2BL (EP030310)P70: Hexagonal Nut #1 4.0 MFZN2Y (VB837300)P60: Pan Head Screw 4.0X10 MFZN2BL (V7018000)P100: Knob (V6955100)(Fig. 5)P60P70P60P70P60P70Power TPower TransformerransformerPower Transformer(Fig. 4)C80C80C80MAIN1/2 Circuit BoardMAIN2/2 Circuit BoardMAIN1/2 Circuit BoardMAIN2/2 Circuit BoardMAIN1/2 Circuit BoardMAIN2/2 Circuit Board(Fig. 3)7F-20AINPUTCHSELECTA/BVOLUMEGAINMASTER VOLUMETREBLEAAMIDDLEBASSAUX INPHONESAto Speakerfrom Power Cordto Power Transformerto Main 2/2 CN5from Power Transformer MAIN1/2 Circuit Board CIRCUIT BOARDSMAIN 1/2 (J, U):CNA-V733720 1MAIN 1/2 (H, B):CNA-V733730MAIN 2/2 (J, U):CNA-V733720MAIN 2/2 (H, B):CNA-V733730to MAIN 1/2 CN4 MAIN 2/2 Circuit BoardComponent SideComponent SideVERSIONFUSERATEINDICATIONJ, U250V 500mAE, BS250V T160mALMust beerasedMust beerased8F-20 INSPECTIONS1.PreparationTo inspect the main unit, the following jigs are required.CD playerHeadphonesBefore turning the power on, set all the knobs on the panel to 0.Raise the CH SELECT switch to select channel A.2.Power supplyConnect the power cord to the suitable power supply socket for each version.(UC - 120V, E&BS - 220V)3.Inspection procedure3-1Input the audio signal of CD player to the AUX-IN jack.3-2Make sure that the sound becomes gradually larger (or smaller) according as you turn the VOLUME knob to theright (or left).3-3Make sure that the high frequency is gradually emphasized (or eliminated) as you turn the TREBLE knob to theright (or left).3-4Make sure that the middle frequency is gradually emphasized (or eliminated) as you turn the MIDDLE knob tothe right (or left).3-5Make sure that the low frequency is gradually emphasized (or eliminated) as you turn the BASS knob to the right(or left).3-6Make sure that the sound becomes larger when you depress the CH SELECT switch to select channel B.Besides, make sure that the sound becomes gradually distorted according as you turn the GAIN knob to the right.3-7Make sure that the sound becomes gradually larger (or smaller) according as you turn the MASTER VOLUMEknob to the right (or left).3-8Raise the CH SELECT switch to select channel A and make sure that the audio signal sounds over the speaker.3-9Connect headphones to the PHONES jack. Make sure that the speaker does not produce any sound and audiosignal sounds over the headphones.3-10Set all the knobs on the panel to 0 and finish the inspection. IC BLOCK DIAGRAMBA4558 (XO078A00)Dual Operational Amplifier1234-V8765Output A+VNon-InvertingInput A-DC Voltage Supply+DC VoltageSupplyOutput BInvertingInput BNon-InvertingInput BInvertingInput A+-+-MAIN: IC2,IC3F-201PARTS LISTGUITAR AMPLIFIER CONTENTSOVERALL ASSEMBLY .2PRE-MAIN UNIT .4ELECTRICAL PARTS .6 WARNINGComponents having special characteristics are marked and must be replaced with parts havingspecifications equal to those originally installed. The numbers in “QTY” shows quantities for each unit. The parts with “-” in “Part No.” are not available as spare parts. The second letter of the shaded () part number is I, not one. The second letter of the shaded () part number is O, not zero.F-202 OVERALL ASSEMBLY602010C40C60C50C60C50C30C30BAC20C70C90C805030C120C100C110OVERALL CABINET ASSEMBLYPre-Main UnitASpeakerBack BoardPre-Main Unit(See P. 4)F-203REF NO.PART NO.DESCRIPTIONREMARKSQTYRANKRANK: Japan only*New parts*10202020203050606060C10C20C30C40C50C60C70C80C90C100C110C120AB-V6954600-VN347600ET500040-V6954600-V596900021770200V6327200V6327300V8480700V6327400EP03031003765580V7363300VN729100XO175A00EI340256VB403600OVERALL ASSEMBLYOverall AssemblyOverall AssemblyOverall AssemblyOverall AssemblyOverall AssemblyPre-Main unitPre-Main unitPre-Main unitPre-Main unitTruss Head ScrewFlat WasherLabelLabelLabelOVERALL CABINET ASSEMBLYOverall Cabinet AssemblyCabinet AssemblyCorner ProtectorOval Head ScrewHandleHandle HolderOval Head ScrewFootBind Head Tapping Screw-1Flat WasherName PlateBind Head Tapping Screw-1Speaker UnitBind Head Tapping ScrewBind Head Screw4.0X25 MFZN2BLGA-103.0X12 MFZN2BLKPBO KAH1D-205KPBO KAH3D400-A4.0X30 MFZN2BLKPBO KRRU193.0X16 MFZN2BL3.0X8X0.5 MFZN2BLF-203.0X10 MFZN2BL4ohm 30W4.0 X 25 FCRM3-BL4.0 X 20 ZMC2BLF20(V695390)(V736090)(V736100)(V736110)J(V695450)U(V736130)H(V736140)B(V736150)J(V695470)U(V736160)H,B(V736170)F20(V695500)44612224442440101010101010101F-204A10A70A60A40A10A30A80A90A20P60P40P60P30P75P70P50P10P20P90P80A50P100P120P110A100A110A130A140A120 PRE-MAIN UNITF-205REF NO.PART NO.DESCRIPTIONREMARKSQTYRANKRANK: Japan only*New parts*P10P20P30P30P30P30P40P50P60P70P75P80P90P100P110P120A10A10A20A30A40A50A50A50A60A70A70A70A70A80A90A100A110A120A130A140-V6954800V6954900-V7511400V7017600V7018000VB837300VB501900V7018100V7554300V6955100ET900050-V7337200V7337300VV849300V7356900V7054700XZ805A00XZ806A00XZ807A00VV104600V6286700V6286900V6287000V6287100V7356700V7356800ET800150VL802300LX200060VB508700ES200210PRE-MAIN UNITPre-Main unitPre-Main unitPre-Main unitPre-Main unitChassisPanel SheetAmp KitAmp KitAmp KitAmp KitSpacer SupportHeat SinkPan Head ScrewHexagonal NutSpring WasherPan Head ScrewButtonKnobToothed Lock Washer-BEarth MarkAmp KitAmp KitAmp KitAmp KitCircuit BoardCircuit BoardInsulation SheetSleevePower SWTransformerTransformerTransformerCord HolderCordCordCordCordCord Strain ReliefCord Strain ReliefToothed Lock Washer-AFlat WasherHexagonal NutFlat WasherHexagonal NutPINGOOD LCC-104.0X10 MFZN2BL#1 4.0 MFZN2Y4.0 MFZN2Y3.0X10 MFZN2BLGA-RED4.0 MFZN2BLBFG-20AD 19X2412SWS0220SDDJE1-A-2CV-100J VCTFUC 3 SJT 18/3E 3 HO5VV-FUK 3 HO5VV-FKR-61 KITAGAWAKF-41 KITAGAWA9.0 MFZN2Y9X14 0.5 FNM39.0 12X2 MFNI3318X12.5 0.6 MFZN212.0 14X2 MFNI33F20J(V695450)U(V736130)H(V736140)B(V736150)J(V733660)U(V733670)H(V733680)B(V733690)CH SELECT A/BVOL,GAIN,MASTER VOLUMETREBLE,MID,BASS(CA06069)J(V733660)U(V733670)H(V733680)B(V733690)J,UH,BPOWER SWJUH,BJUHB22222620101010101010101REF NO.PART NO.DESCRIPTIONREMARKSQTYRANKF-206RANK: Japan only*New parts ELECTRICAL PARTS*C01C02C03C04C05C06C07C08C09C10C11C12C13C14C15C16C17C18C19C20C21C22C23C24C25C26C27C28C29C30C31C32C33C34C35C36C37CN1CN2CN3D01D02DB1FZ1FZ1IC1IC2IC3JK1JK2JK3LD1LD2R01R02R03R04R05R06R07R08R09V7337200V7337300V7337200V7337300V6609900VV291400VV062800VZ353500UR866100VZ353500VZ353500VV321100UR847100UR847100UA654470VZ353500VV062800UR847100UR847100VZ353500VZ353500UA653270UR866100UR865470UR847100VZ353500UR866100VZ353500UR847100UR847100FG613100UR837470VV062800VV062800UR847100UR847100V7355000VZ354600VZ354600UR749220UR749220UR847100UR847100VG879900LB932040LB918030VD631600VD631600VP344100V7630900V7630800X0078A00X0078A00XZ311A00V3633400V6176500V7447000VV620800VV620800HF456220HF459100HF457100HF457330HF457330HF456220HF459100HF458100HF457100ELECTRICAL PARTSCircuit BoardCircuit BoardCircuit BoardCircuit BoardFuse HolderJumper WireMylar CapacitorCeramic Capacitor-SLElectrolytic Cap.Ceramic Capacitor-SLCeramic Capacitor-SLMonolithic Mylar CapacitorElectrolytic Cap.Electrolytic Cap.Mylar CapacitorCeramic Capacitor-SLMylar CapacitorElectrolytic Cap.Electrolytic Cap.Ceramic Capacitor-SLCeramic Capacitor-SLMylar CapacitorElectrolytic Cap.Electrolytic Cap.Electrolytic Cap.Ceramic Capacitor-SLElectrolytic Cap.Ceramic Capacitor-SLElectrolytic Cap.Electrolytic Cap.Ceramic Capacitor-BElectrolytic Cap.Mylar CapacitorMylar CapacitorElectrolytic Cap.Electrolytic Cap.CapacitorMonolithic Ceramic Cap.Monolithic Ceramic Cap.Electrolytic Cap.Electrolytic Cap.Electrolytic Cap.Electrolytic Cap.Base Post ConnectorBase Post ConnectorBase Post ConnectorDiodeDiodeDiode StackFuseFuseICICICPhone JackPhone JackPhone JackLEDLEDCarbon ResistorCarbon ResistorCarbon ResistorCarbon ResistorCarbon ResistorCarbon ResistorCarbon ResistorCarbon ResistorCarbon ResistorWH-0070.600.1 50V J100P 50V J1.00 50.0V100P 50V J100P 50V J0.22 50V J10.00 25.0V10.00 25.0V0.0470 50V J100P 50V J0.1 50V J10.00 25.0V10.00 25.0V100P 50V J100P 50V J2700P 50V J1.00 50.0V0.47 50.0V10.00 25.0V100P 50V J1.00 50.0V100P 50