Yamaha-AX497-int-sm(1) 维修电路原理图.pdf

SERVICE MANUALThis 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 alreadyknown 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 personalinjury, 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 YAMAHARetailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certification orrecognition 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 servicedepartments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable andspecifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact thedistributors 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 this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.IMPORTANT NOTICE100974SERVICE MANUALSTEREO AMPLIFIERADJUSTMENT / 調整 . . . . . . . . . . . . . . . . . . . . . . . . . . .11IC DATA / IC . . . . . . . . . . . . . . . . . . . . . . . . . . . .12BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 13PIN CONNECTION DIAGRAM / 半導体外形図 . . . . . .14PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 1520SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 2122PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2333REMOTE CONTROL RAX15 . . . . . . . . . . . . . . . . . . 34I CONTENTSTO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . 23IMPEDANCE SELECTOR . . . . . . . . . . . . . . . . . . . . . . 3REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 3FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46SPECIFICATIONS / 参考仕様 . . . . . . . . . . . . . . . . . . .78INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DISASSEMBLY PROCEDURES / 分解手順 . . . . . .910DPX-1200AX-497AX-497 2005 YAMAHA CORPORATION. All rights reseved.This manual is copyrighted by YAMAHA and may not be copied orredistributed either in print or electronically without permission. 05.09RadioFans.CN 收音机爱 好者资料库2AX-497AX-497I TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand 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.AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETGLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare 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 FORANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumesor expose eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your handsbefore handling food.About Lead Free Solder / 無鉛The P.C.B.s installed in this unit are soldered using the fol-lowing solder.本機搭載基板付使用下記通。“CAUTION”“F151, F152 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE.”CAUTIONF151, F152 : REPLACE WITH SAME TYPE 8A, 125V FUSE.ATTENTIONF151, F152 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 8A, 125V.A VSI DE A / A面SI DE B / B面FUNCTI ON P. C. B.Lead Free Solder / 無鉛MAI N P. C. B.Lead Free Solder / 無鉛Side ASide BSMT REFLOW ProcessMI FLOW ProcessSolder DipAmong some types of lead free solder currently available, itis recommended to use one of the following types for therepair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth)無鉛種類、修理時下記無鉛使用推奨。Sn+Ag+Cu （錫+ 銀+ 銅）Sn+Cu （錫 +銅）Sn+Zn+Bi （錫+ 亜鉛+ ）RadioFans.CN 收音机爱 好者资料库3AX-497DPX-1200AX-497I IMPEDANCE SELECTORCaution:1. As the melting point temperature of the lead free solder isabout 30C to 40C (50F to 70F) higher than that of thelead solder, be sure to use a soldering iron suitable toeach solder.2. If lead solder must be used, be sure to remove lead freesolder from each terminal section of the parts to be replacedand from the area around it completely before soldering, ormake sure that the lead free solder and lead solder melttogether fully.注意：1. 無鉛融点温度通常鉛入比3040 程度高、合使用。2. 鉛入使得場合、 交換部品端子部周辺部無鉛取除、 無鉛鉛入十分溶状態付。WARNING:Do not change the setting of the IMPEDANCE SELECTOR switchwhen the unit power is switched on, as doing so may damagethe unit.注意切換、 必電源切行。電源入行、故障原因。IMPEDANCE SELECTORI FRONT PANELI REMOTE CONTROL PANEL4AX-497AX-497I REAR PANELSM U, C modelsM R modelM T model5AX-497DPX-1200AX-497M K modelM A modelM B model6AX-497AX-497M G, E modelsM L modelM J model7AX-497DPX-1200AX-497GENERAL / 総合Power Supply / 電源電圧U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . AC 120 V, 60 HzR model . . . . . . . . . . . . . AC 110/120/220/230-240 V, 50/60 HzT model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 50 HzK model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 60 HzA model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240 V, 50 HzB, G, E models . . . . . . . . . . . . . . . . . . . . . . . . AC 230 V, 50 HzL model . . . . . . . . . . . . . . . . . . . . AC 220/230-240 V, 50/60 HzJ model . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 100 V, 50/60 HzPower Consumption / 消費電力U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 W/300VAR, T, K, A, B, G, E, L, J models . . . . . . . . . . . . . . . . . . . 220 WL model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 WStandby Power Consumption / 待機時消費電力U, C, T, K, A, B, G, E, J models . . . . . . . . . . . . . . . . . . . . 1.1 WR model (AC 110/120 V) . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 WR, L models (AC 220/230-240 V) . . . . . . . . . . . . . . . . . . . 2.7 WMaximum Power ConsumptionR model (1 kHz, 6 ohms, 10% THD) . . . . . . . . . . . . . . . 490 WAC Outlet / AC3 Switched OutletR, J models . . . . . . . . . . . . . . . . . . . . . . . . . . 50 W Max. totalU, C, T, G, E, L models . . . . . . . . . . . . . . . . 100 W Max. total1 Switched OutletA, B models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W Max.Dimensions (W x H x D) / 寸法 （幅高奥行） . . . . . . . . . . . . . . . . . . . . . . . . . 435 x 151 x 390 mm(17-1/8 x 5-15/16 x 15-3/8)Weight / 質量 . . . . . . . . . . . . . . . . . . . . . . . . .9.1 kg (20 lbs 1 oz)Finish / 仕上 . . . . .Black color (U, C, R, A, B, G, E, L models)Titanium color (R, B, G, E, L models)Gold color (J, R, T, K, L models)Accessories / 付属品 . . . . . . . . . . . . . . . . .Remote Control x 1Battery (Manganese Dry) x 2* Specifications subject to change without notice.U . USA modelC . Canadian modelR . General modelT . Chinese modelK . Korean modelA . Australian modelB . British modelG . European modelE . South European modelL . Singapore modelJ. Japanese modelI SPECIFICATIONS / 参考仕様AUDIO SECTION / 部Minimum RMS Output Power (Power Amp. Section) / 定格出力L/R, 20 Hz to 20 kHzU, C, R, T, K, A, B, G, E, L, J models (0.019% THD, 8 ohms) . .85 W + 85 WU, C, R, T, K, A, B, G, E, J models (0.038% THD, 6 ohms) . .100 W + 100 WDynamic Power Per Channel (IHF) / 8/6/4/2 ohms . . . . . . . . . . . . . . . . . . . . . . .130/150/185/220 WMaximum Power Per Channel (B, G, E models)1 kHz, 0.7 % THD, 4 ohms . . . . . . . . . . . . . . . . . . . . . . . .120 WIEC Power (B, G, E models)1 kHz, 0.019% THD, 8 ohms . . . . . . . . . . . . . . . . . . . . . .100 WPower Band Width / L/R, 0.04% THD, 42.5 W, 8 ohms . . . . . . . . . .10 Hz to 50 kHzDamping Factor / 20 Hz to 20 kHz, SPEAKER-A, 8 ohms . . . . . . . . .240 or moreMaximum Power (EIAJ) / 実用最大出力1 kHz, 10 % THDR, T, K, L, J models (8 ohms) . . . . . . . . . . . . . . . . . . . . . .130 WR, T, K, J models (6 ohms) . . . . . . . . . . . . . . . . . . . . . . . .150 WInput Sensitivity/Input Impedance / 入力感度/ 入力PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . .2.5 mV/47 k-ohmsCD, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . .195 mV/47 k-ohmsMaximum Input Signal / 最大許容入力PHONO MM, 1kHz, 0.003 % THD . . . . . . . . . . . . . . . . .115 mVCD, etc., 1kHz, 0.5 % THD . . . . . . . . . . . . . . . . . . . . . . . .2.2 VOutput Level/Output Impedance / 出力電圧/ 出力REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . .195 mV/1.6 k-ohmsHeadphone Jack Rated Output/Output Impedance /出力/ 出力CD, etc. 1 kHz, 150 mV, 8 ohms, 0.019% THD . . . . . . . .300 mV/680 ohmsFrequency Response / 周波数特性CD, etc. 20 Hz to 20 kHz . . . . . . . . . . . . . . . . . . . . . .0 0.5 dBCD/DVD DIRECT AMP ON, 10 Hz to 100 kHz . . . . .0 1.0 dBRIAA Equalization Deviation / RI AA偏差PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 0.3 dBTotal Harmonic Distortion (20 Hz to 20 kHz) / 全高調波歪率PHONO MM to REC OUT (3 V) . . . . . . . . . . . . . . . .0.003 % or lessCD, etc. to SP OUT (42.5 W/8 ohms) . . . . . . .0.009 % or lessSignal to Noise Ratio (IHF-A Network) / S/ N比PHONO MM (Input shorted, 5 mV) . . . . . . . . . .88 dB or moreCD (CD DIRECT AMP ON, Input shorted, 195mV) . . . . . .110 dB or moreResidual Noise (IHF-A Network) / 残留CD DIRECT AMP ON . . . . . . . . . . . . . . . . . . . . .35 V or lessPURE DIRECT ON . . . . . . . . . . . . . . . . . . . . . . .90 V or lessChannel Separation / CD, etc. (Input 5.1 k-ohms shorted)1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 dB or more10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 dB or moreTone Control Characteristics / 特性BASSBoost/Cut (20 Hz) . . . . . . . . . . . . .+10 dB/-10 dBTurnover Frequency . . . . . . . . . . . . . . . . .350 HzTREBLEBoost/Cut (20 kHz) . . . . . . . . . . . .+10 dB/-10 dBTurnover Frequency . . . . . . . . . . . . . . . . .3.5 kHzContinuous Loudness Control /Attenuation (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 dBGain Tracking Error / 0 to -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 dB or less8AX-497AX-497Unit : mm (inch)DIMENSIONS / 寸法図I INTERNAL VIEWqMAIN (2) P.C.B.wMAIN (4) P.C.B. (R, L models)eMAIN (5) P.C.B.rMAIN (1) P.C.B.tMAIN (6) P.C.B.yMAIN (3) P.C.B.uFUNCTION (4) P.C.B.iFUNCTION (5) P.C.B.oFUNCTION (12) P.C.B.!0FUNCTION (7) P.C.B.!1FUNCTION (6) P.C.B.!2FUNCTION (1) P.C.B.!3FUNCTION (10) P.C.B.!4FUNCTION (8) P.C.B.!5FUNCTION (11) P.C.B.!6FUNCTION (2) P.C.B.!7FUNCTION (9) P.C.B.!8FUNCTION (3) P.C.B.435 (17-1/8)151 (5-15/16)130 (5-1/8)350 (13-3/4)21(13/16)18.5(3/4)21.5(7/8)390 (15-3/8)ywertio!6o!7q!0!1!8!0!1!2!3!4!5 !2u9AX-497DPX-1200AX-497I DISASSEMBLY PROCEDURES / 分解手順 番号順部品取外。 AC電源、電源抜。1. 外方a.q4本、w1本、e4本外。（Fig. 1）b. 後方取外。（Fig. 1）2. 外方a. INPUT取外。b.r1本外、 取外。（Fig. 1）c.t7本外、 取外。（Fig. 1）3. 外方y2本外、 L/R取外。（Fig. 1）4. 外方a.u1本外。（Fig. 1）b.i2本外、 前方引出。（Fig. 1）c. 固定束線止。d. CB221、 CB226、 CB302、 CB306、 CB532、 CB581、CB681外、 取外。（Fig. 1）1. Removal of Top Covera. Remove 4 screws ( q ), 1 screw ( w ) and 4 screws (e ). (Fig. 1)b. Slide the Top Cover rearward to remove it. (Fig. 1)2. Removal of Front Panel Unita. Remove the INPUT knob.b. Remove 1 screw ( r ) and then remove the SupportTop. (Fig. 1)c. Remove 7 screws ( t ) and then remove the FrontPanel Unit. (Fig. 1)3. Removal of Plate SideRemove 2 push rivets ( y ) and then remove the PlateSide L/R. (Fig. 1)4. Removal of Sub Chassis Unita. Remove 1 push rivet ( u ). (Fig. 1)b. Remove 2 screws ( i ) and then slide the Sub ChassisUnit forward. (Fig. 1)c. Loosen the harness fixture fixing the cable.d. Remove connectors CB221, CB226, CB302, CB306,CB532, CB581 and CB681 and then remove the SubChassis Unit. (Fig. 1) Remove parts in disassembly order as numbered. Disconnect the power cable from the AC outlet. Top CoverFront Panel UnitKnobSub Chassis UnitSupport TopPlate Side L LPlate Side R RCB306CB302CB532CB581CB681CB221CB226riiueyyttqqewFig. 110AX-497AX-4975. 外方a. 止o1本外。（Fig. 2）b. 止!02本外。（Fig. 2）c.!12本外、 MAIN (4) P. C.B.取外。（Fig. 2） （R, L仕向）d.!22本!32本外。（Fig. 2）e. CB3CB151外。 (Fig. 2)f.取外。（Fig. 2）5. Removal of Amp Unita. Remove 1 screw ( o ) attaching the ImpedanceSelector. (Fig. 2)b.Remove 2 screws ( !0 ) attaching the Speaker Termnal.(Fig. 2)c. Remove 2 screws ( !1 ) and then remove the MAIN (4)P.C.B. (Fig. 2) (R, L models only)d. Remove 2 screws ( !2 ) and 2 screws ( !3 ). (Fig. 2)e. Remove connectors CB3 and CB151. (Fig. 2)f.Remove the Amp Unit. (Fig. 2)Fig. 2!0o!1!3!3!2Amp UnitMAIN (4) P.C.B.CB3CB151Speaker TerminalImpedance Selector11AX-497DPX-1200AX-497I ADJUSTMENT / 調整G 電流確認1. 電源投入直後、 R64 (L ch)/R65 (R ch)端子間電圧測定、0.1mV 10.0mV 間確認。2. 電圧10mV越場合、R51 (L ch)/R52 (R ch)抵抗、電圧再確認。3. 60分後、 電圧0.25mV30.0mV確認。G CONFIRMATION OF IDLING CURRENT1. Right after the power is turned on, confirm that the volt-age across the terminals of R64 (L ch) and R65 (R ch)are between 0.1mV to 10.0mV.2. If the measured voltage exceeds 10.0mV, open (cut off)R51 (L ch), R52 (R ch) and reconfirm the voltage.3. Confirm that the voltage is between 0.25mV and 30.0mVafter 60 minutes.R64R51R52R65R64 (L ch)R65 (R ch)CutR51 (L ch)R52 (R ch)0.1mV10mV12AX-397AX-397IC301 : M38503G4A-101FP (FUNCTION (1) P.C.B.)8-bit MicroprocessorI IC DATA / IC123456789101112131415161718192021222324252627282930313233343536373839404142VCCVREFAVSSP44/INT3/PWMP43/INT2/SCMP2P42/INT1P41/INT0P40/CNTR1P27/CNTR0/SRDY1P26/SCLK1P25/TXDP24/RXDP23P22CNVSSP21/XCINP20/XCOUT/RESETXINXOUTVSSP17/(LED7)P16/(LED6)P15/(LED5)P14/(LED4)P13/(LED3)P12/(LED2)P11/(LED1)P10/(LED0)P07(AN8)P06(AN7)P05(AN6)P04(AN5)P03/SRDY2P02/SCLK2P01/SOUT2P00/SIN2P34/AN4P33/AN3P32/AN2P31/AN1P30/AN0MCUMCUMCUIIIIIOOOO/IOO