Yamaha-AX496-int-sm(1) 维修电路原理图.pdf

AX-496/396SERVICE MANUALSTEREO AMPLIFIERAX-496/396100702I CONTENTSSPECIFICATIONS. 1TO SERVICE PERSONNEL . 2REMOTE CONTROL PANEL . 2IMPEDANCE SELECTOR . 2FRONT PANELS. 3REAR PANELS . 3INTERNAL VIEW . 6DISASSEMBLY PROCEDURES . 6ADJUSTMENTS. 7BLOCK DIAGRAM. 8-COM DATA . 9PRINTED CIRCUIT BOARD . 1025SCHEMATIC DIAGRAM . 2629PARTS LIST . 3047REMOTE CONTROL TRANSMITTER . 48IMPORTANT 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 resultin personal injury, destruction of expensive components, and failure of the product to perform asspecified. 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 applicable technical capabilities, or establish a principle-agentrelationship 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 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 bodymay have accumulated by grounding yourself to the ground buss in the unit (heavy gauge blackwires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you applypower to the unit.AX-496/396P.O.Box 1, Hamamatsu, JapanRadioFans.CN 收音机爱 好者资料库AX-496/3961435 (17-1/8)Unit : mm (inch)151 (5-15/16)130 (5-1/8)350 (13-3/4)21(13/16)19.5(3/4)21.5(7/8)391 (15-3/8)I SPECIFICATIONSI Power SectionMinimum RMS Output Power8, 20Hz to 20kHz, 0.019% THDAX-49685W+85WAX-39660W+60WMaximum Output Power (EIAJ)1kHz, 10% THDAX-496 8/6130W / 150WAX-396 6110WDynamic Power (IHF)8/6/4/2AX-496130/150/185/220WAX-396100/120/140/150WDIN Standard Output Power4, 1kHz, 0.7% THDAX-496120WAX-39695WIEC Output Power8, 1kHz, 0.019% THDAX-496100WAX-39675WPower Band Width8, Half power, 0.04% THD10Hz to 50kHzDamping Factor8, 20Hz to 20kHz240Frequency Response20Hz to 20kHz00.5dBTotal Harmonic Distortion (20Hz to 20kHz)CD/DVD to SP OUT (8, Half power)0.008%Signal to Nise Ratio (IHF-A-Network)CD/DVD (Input Shorted, CD/DVD DIRECT AMP ON) 110dBPHONO (Input Shorted)88dBResidual Noise (IHF-A-Network)CD/DVD DIRECT AMP ON35VI Control SectionInput Sensitivity / ImpedanceCD/DVD etc.150mV / 47kPHONO2.5mV / 47kOutput Level / ImpedanceREC OUT150mV / 1.6kHeadphone Jack Rated Output / Impedance0.25V / 680Channel SeparationCD/DVD (Input 5.1k Terminated) 1kHz/10kHz65 / 50dBTone Control CharacteristicsBASS10dB (20Hz)TREBLE10dB (20kHz)Continuous Loudness ControlAttenuation-30dB (1kHz)I GeneralPower SupplyR, T modelsAC110/120/220/240V, 50/60HzA modelAC240V, 50HzB, G modelsAC230V, 50HzPower ConsumptionAX-496Approx. 210WAX-396Approx. 150WAC Outlets (Switched)R, T, G models100W Max x 3A, B models100W Max x 1Dimensions (W x H x D)435 x 151 x 391mm(17-1/8 x 5-15/16 x 15-3/8)WeightAX-4969.5 kg (21lbs)AX-3968.7 kg (19lbs 3oz)AccessoriesRemote Control TransmitterBatteriesColorGold / Black / Titan* Specifications subject to change without notice.R . General modelT . China modelA . Australia modelB . British modelG. European model DIMENSIONSRadioFans.CN 收音机爱 好者资料库AX-496/396IMPEDANCE SELECTORWARNING:Do not change the IMPEDANCE SELECTOR switch setting while the power to this unit is on, otherwise this unit may be damaged.2TAPESTANDBY/ONDECK A/BDIR BDIR AA/B/C/D/EPRESETCD/DVDMDTAPETUNERAUXRAX9V499920PHONO+CDTUNERDISC SKIP+VOLUMEWALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEWARNING: 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 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.I TO SERVICE PERSONNEL1. Critical Components Information.Components 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 ohm shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.I REMOTE CONTROL PANELI IMPEDANCE SELECTORAX-496/3963MAX-496MAX-396I FRONT PANELSI REAR PANELS (AX-496)R modelAX-496/3964B modelG modelT modelI REAR PANELS (AX-396)R modelAX-496/3965B modelG modelA modelJ modelAX-496/39611233445567771790A832546B6I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)1. Removal of Top CoverRemove 4 screws (1) and 4 screws (2) in Fig. 1.2. Removal of Front Panela. Remove 6 screws (3) in Fig. 1.3. Checking and Parts Replacement of MAIN P.C.B. (1)a. Disconnect the power cord from the AC outlet.b. Remove 3 screws (4) attaching the Speaker terminaland Impedance Selector in Fig. 1.c. Remove 2 screws (5) and remove 1 plastic rivet (6) inFig. 1, then remove the Sub Chassis.d. Remove 4 screws (7) in Fig. 1, then remove the MAINP.C.B. (1) with Heat Sink and Chassis.Fig. 1I INTERNAL VIEW1 AX-496: MAIN P.C.B. (6) / AX-396: MAIN P.C.B. (7)2 MAIN P.C.B. (2)3 MAIN P.C.B. (1)4 MAIN P.C.B. (3)5 FUNCTION P.C.B. (4)6 FUNCTION P.C.B. (5)7 MAIN P.C.B. (9)8 MAIN P.C.B. (8)9 FUNCTION P.C.B. (7)0 FUNCTION P.C.B. (6)A FUNCTION P.C.B. (1)B FUNCTION P.C.B. (2)AX-496/396R553R552 R560R561R553 (L ch)R561 (R ch)R552 (L ch)R560 (R ch)0.1mV10mVCutI ADJUSTMENTSConfirmation of Idling Current Right after Power is switched ON, confirm the voltagesmeasures at R553 (L ch) and R561 (R ch) are between0.1mV to 10mV. If it exceeds 10mV, open (cut off) R552 (L ch), R560 (Rch) and reconfirm the voltage.7AX-496/39610dB10dBPHONOCDSP ASP BPHONESTUNERAUXTAPE1PBTAPE1RECMDPBMDRECCD DIRECT AMPPHONO EQ AMPCD DIRECT AMPCD DIRECT AMPMOTORDRIVERONONOFFOFF31.8dBMMain VR10dBSMULOUDNESSBALANCETONE CONTROLAUDIOMUTEABPOWER AMPRYSPLB1515BBLB12S+AUDIO MUTESMURec SelectRec Select DataPower ONPower ON/OFFRYPSRemote ControlInput Select DataInput SelectMain VRProtectionRYSPU-COMRYPS10dB10dBPHONOCDSP ASP BPHONESTUNERAUXTAPE1PBTAPE1RECTAPE2PBTAPE2RECCD DIRECT AMPPHONO EQ AMPCD DIRECT AMPCD DIRECT AMPMOTORDRIVERONONONOFFOFFOFF33.5dBMMain VR10dBSMURYPSLOUDNESSBALANCETONE CONTROLPURE DIRECTAUDIOMUTEABPOWER AMPRYSPLB1515BBLB12S+AUDIO MUTESMURec SelectRec Select DataPower ONPower ON/OFFRYPSRemote ControlInput Select DataInput SelectMain VRProtectionRYSPU-COMI BLOCK DIAGRAM8M AX-496M AX-396AX-496/396No.PortI/OFormREFunction1P53II2P17I/OOCEI Chip Enable (Input selector)3P16I/OOCK Clock S-CLK4P15I/OODATA Data T x D5P14I/OO6P13I/OOTMO Tape Monitor7P12I/OOVRUP Motor Volume (UP)8P11I/OOVRDN Motor Volume (DOWN)9P10I/OORYPS Power Relay10P27IIENR Rotary Encoder (Right)11P26IIENL Rotary Encoder (Left)12P25IID34/5 AX-496, 396/596 Detect H: 496, 396 L: 59613P24II14P23IIREC Rec Out Selector Detect IN315P22IIPRDC Protection (DC) IN216P21IIPRI Protection (Overload) IN117P20IIPRPS Protection (Power Supply) IN018VrefIVREF19XinIXIN20XoutOXOUT21VssVSS22VccVCC23P50IIPRINH Release the Protection24P61I/OO25/RESETI/RESET26P30IIPD Power Down Detect INT027P31IIREM Remote Control INT128P32IID43 AX-493/393 Detect29P33IITPM Tape Monitor30P40I/OOLEDTM LED (Tape Monitor)31P41I/OOMUTE Mute32P42I/OORYSP Speaker Relay33P43I/OOLSBY LED (Power)34P00I/OIPS Power Key On Wakeup35P01I/OIREM Remote Control (Wakeup) Key On Wakeup36P02I/OOLEDP LED (Phono)37P03I/OOLEDTM LED (Tuner)38P04I/OOLEDC LED (CD)39P05I/OOLEDM LED (Tape)40P06I/OOLEDTP LED (MD)41P07I/OOLEDA LED (AUX)42P52II9I -COM DATAIC101 : M37478M4-409SPABCDEFGHIJ1234567AX-496/396To FUNCTION (7)To FUNCTION (6)HLEHRRYSPABERELE15-15YEBEBEREREORORTo MAIN (6)IMPEDANCESELECTORSPEAKERSTo FUNCTION (1)MUS12GNDGNDRYSPRYPSPRPSPRIPRDVRPVRG11I PRINTED CIRCUIT BOARD (Foil side)10P.C.B. MAIN (3)AX-496P.C.B. MAIN (1)ABCDEFGHIJ123457AX-496/3966POWERTo MAIN P.C.B. (2)POWERTRANSFORMERTo MAIN (2)GYBRPOWERTRANSFORMERTo MAIN (1)REORBEYEBEREORPOWERTRANSFORMERTo MAIN (2)To MAIN (4)GYBRBRWHYEREORREWHREYEREBROR To MAIN (5)To MAIN (9)To MAIN (1)To MAIN (8) (B, G models)To MAIN (5) (R, T models)AC OUTLETSE+12RYPSGYBRWHBE12I PRINTED CIRCUIT BOARD (Foil side)13AX-496P.C.B. MAIN (2)P.C.B. MAIN (4) (R, T models)P.C.B. MAIN (5) (R, T models)P.C.B. MAIN (6)P.C.B. MAIN (8) (B, G models)P.C.B. MAIN (9)ABCDEFGHIJ1234567AX-496/396REC OUTINPUTVOLUMECD/DVD DIRECT AMPPURE DIRECT1422221TLOETRO-15TLI15TRIELERCEDATACL-15LER15CDDLECDDRCDMVRGVRPPROPRIPRPSRYPSRYSPDGDGS12MULSBYPHTUCDMDTAAU5VREMDGPSGNDCD-DTPMLEDP-D/5VTo FUNCTION (11)To FUNCTION (6)To FUNCTION (4)To FUNCTION (8)To MAIN (1)18BASSTREBLEBALANCELOUDNESS-15+15ELERETo MAIN (1)To FUNCTION (1)TLOETRO-15TLI15TRIELER1514AX-496I PRINTED CIRCUIT BOARD (Foil side)P.C.B. FUNCTION (1)P.C.B. FUNCTION (2)P.C.B. FUNCTION (3)P.C.B. FUNCTION (6)ABCDEFGHIJ123457AX-496/3966CD/DVD DIRECT AMPPURE DIRECTTo FUNCTION (1)GNDCD-DTPMLEDP-D/5VPOWERTo FUNCTION (8)LSBY5VSTANDBY/ONPSDGREM5VTo FUNCTION (8)PHONOTUNERCD/DVDTAPEMDAUXTo FUNCTION (1)To FUNCTION (10)To FUNCTION (9)LSBYPHTUCDMDTAAU5VREMDGPSLSBY5VPSDGREM5VPHONESSPEAKERSABTo MAIN (1)HLEHRRYSPABCD/DVDPHONOTo FUNCTION (4)CDRECDL-15PHLEPHR15TUNERAUXINOUTTAPEINOUTMD11151516163030CDRECDL-15PHLEPHR15CEDATACL-15LER15CDDLECDDRCDMTo FUNCTION (5)To FUNCTION (1)1617AX-496I PRINTED CIRCUIT BOARD (Foil side)P.C.B. FUNCTION (4)P.C.B. FUNCTION (5)P.C.B. FUNCTION (7)P.C.B. FUNCTION (8)P.C.B. FUNCTION (9)P.C.B. FUNCTION (10)P.C.B. FUNCTION (11)ABCDEFGHIJ1234567AX-496/396IMPEDANCESELECTORSPEAKERSTo FUNCTION (7)To FUNCTION (6)HLEHRRYSPABERELE15-15YEREREORORTo MAIN (6)To FUNCTION (1)MUS12GNDGNDRYSPRYPSPRPSPRIPRDVRPVRGI PRINTED CIRCUIT BOARD (Foil side)P.C.B. MAIN (3)AX-396P.C.B. MAIN (1)1918ABCDEFGHIJ123457AX-496/3966To MAIN (9)To MAIN (1)To MAIN (8) (A, B, G models)To MAIN (5) (R model)AC OUTLETSE+12RYPSGYBRWHBEPOWERTo MAIN P.C.B. (2)POWERTRANSFORMERTo MAIN (2)GYBRPOWERTRANSFORMERTo MAIN (1)REORBLORREPOWERTRANSFORMERTo MAIN (2)To MAIN (4)GYBRBRWHYEREORREWHREYEREBROR To MAIN (5)I PRINTED CIRCUIT BOARD (Foil side)AX-396P.C.B. MAIN (2)P.C.B. MAIN (4) (R model)P.C.B. MAIN (5) (R model)P.C.B. MAIN (7)P.C.B. MAIN (8) (A, B, G models)P.C.B. MAIN (9)2021ABCDEFGHIJ1234567AX-496/396INPUTVOLUMECD/DVD DIRECT AMP1422221TLOETRO-15TLI15TRIELERCEDATACL-15LER15CDDLECDDRCDMVRGVRPPROPRIPRPSRYPSRYSPDGDGS12MULSBYPHTUCDMDTAAU5VREMDGPSGNDCD-DTPMLEDP-D/5VTo FUNCTION (11)To FUNCTION (6)To FUNCTION (4)To FUNCTION (8)To MAIN (1)18BASSTREBLEBALANCELOUDNESS-15+15ELERETo MAIN (1)To FUNCTION (1)TLOETRO-15TLI15TRIELERAX-3962322P.C.B. FUNCTION (1)P.C.B. FUNCTION (2)P.C.B. FUNCTION (3)P.C.B. FUNCTION (6)I PRINTED CIRCUIT BOARD (Foil side)ABCDEFGHIJ123457AX-496/3966TAPE MONITORTo FUNCTION (2)POWERTo FUNCTION (8)LSBY5VPHONOTUNERCD/DVDTAPEMDAUXTo FUNCTION (1)To FUNCTION (10)To FUNCTION (9)LSBYPHTUCDMDTAAU5VREMDGPSLSBY5VPSDGREM5VCD/DVD DIRECT AMPTAPE MONITORTo FUNCTION (1)GNDCD-DTPMLEDP-D/5VSTANDBY/ONPSDGREM5VTo FUNCTION (8)PHONESSPEAKERSABTo MAIN (1)HLEHRRYSPABCD/DVDPHONOTo FUNCTION (4)CDRECDL-15PHLEPHR15TUNERAUXINOUTTAPEINOUTMD1189115151616163030CDRECDL-15PHLEPHR15CEDATACL-15LER15CDDLECDDRCDMTo FUNCTION (5)To FUNCTION (1)AX-3962425I PRINTED CIRCUIT BOARD (Foil side)P.C.B. FUNCTION (4)P.C.B. FUNCTION (5)P.C.B. FUNCTION (7)P.C.B. FUNCTION (8)P.C.B. FUNCTION (9)P.C.B. FUNCTION (10)P.C.B. FUNCTION (11)P.C.B. FUNCTION (12)A123456789BCDEFGHIJKLAX-496# All voltage are measured with a 10M/V DC electric 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.26SCHEMATIC DIAGRAMPIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.BCE2SA16952SC44662SA11452SA9702SC27052SC1815?2SA1015?2SC2240?2SA893A2SC1890AS4VB202SA13582SC44882SD1915F2SC1740SDTC144ES2SA933SEECCBBECB+ECBDIODESAnodeCathodeNJM2068LD18LB1641LC78211110TC4053BP1816M37478M4-408SP121421153023P15IN 11GND4VZ6IN 2OUT 18VCC 210OUT 29P2INPUT LOGICPRE DRIVER7VCC 187654321OUT1Vcc+IN2IN2OUT2+Vcc+IN1IN1NJM2068LDLC78211Point 1 and 2Emitter of Q108Collector of Q104Point 3Pin 20 of IC101LB1641AX-496To MAIN (1)see page 27CD/DVD DIRECT AMP OFFCD/DVD DIRECT AMP ONCD/DVD DIRECT AMP & PURE DIRECT OFFTo MAIN (1)see page 27To/From MAIN (3)see page 2712.6-12.714.2-14.300000000000000000000000000000000000000000000000.50.50.70.70.71.81.814.814.800000014.714.714.714.7-14.8-14.84.84.8000000000000000.70.74.84.74.74.74.74.74.74.74.84.82.94.84.84.84.84.84.84.84.84.84.84.84.84.84.84.84.74.71.80.91.74.74.74.74.80.24.84.84.82.22.300004.800.90.6000000000012306.16.15.45.45.44.84.76.56.512.112.812.812.84.80000000-14.214.2004.84.80.7-1.7-2.0-5.014.614.61.700000000.10.1-0.1-0.1-14.3-14.314.314.30PHONO EQ AMPCD BUFFERINPUT SELECTORMOTOR DRIVERSYSTEMCONTROLRESETPROTECTIONVOLUME AMPTONE CONTROL AMP875687562143214387562341A123456789BCDEFGHIJKLSCHEMATIC DIAGRAM27AX-496PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.BCE2SA16952SC44662SA11452SA9702SC27052SC1815?2SA1015?2SC2240?2SA893A2SC1890AS4VB202SA13582SC44882SD1915F2SC1740SDTC144ES2SA933SEECCBBECB+ECBDIODESAnodeCathodeAX-496# All voltage are measured with a 10M/V DC electric 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.To/From FUNCTION (1)see page 26From FUNCTION (7)see page 26From FUNCTION (6)see page 26000000000050.1-50.05.86.200.10.10.10.112.812.8AC12.6AC78.00.10.70.70.723.623.642.942.943.143.10015.8-15.8-15.8-15.2-18.3-18.318.315.815.218.4000000.60.60048.8-48.8-48.8-48.8-48.1-48.8-49.3-49.1-49.1-49.0-49.0-49.0-49.0-49.0-49.0-49.0-49.0-49.049.248.949.350.050.050.0-50.0-50.0-50.0-50.050.050.050