Yamaha-AX-497-Service-Manual电路原理图.pdf

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1、SERVICE MANUAL 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 no

2、t 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 ser

3、vice 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 establi

4、sh 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, inevitable

5、 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

6、 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 100974 SERVICE MANUAL STEREO AMPLIFIER ADJUSTMENT / 調整 . . . .

7、 . . . . . . . . . . . . . . . . . . . . . . .11 IC DATA / IC . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 PIN CONNECTION DIAGRAM / 半導体外形図 . . . . . .14 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 1520 SCHE

8、MATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 2122 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2333 REMOTE CONTROL RAX15 . . . . . . . . . . . . . . . . . . 34 I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . 23 IMPEDANCE SELECTOR . . . . . . . . . .

9、 . . . . . . . . . . . . 3 REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 3 FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 SPECIFICATIONS / 参考仕様 . . . . . . . . . . . . . . . . . . .78 INTER

10、NAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DISASSEMBLY PROCEDURES / 分解手順 . . . . . .910 DPX-1200AX-497 AX-497 2005 YAMAHA CORPORATION. All rights reseved. This manual is copyrighted by YAMAHA and may not be copied or redistributed either in print or electronically without p

11、ermission. 05.09 RadioFans.CN 收音机爱 好者资料库 2 AX-497 AX-497 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 120

12、V 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 ohms shunted by 0.15F. AC LEAKAGE TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL

13、 OUTLET GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. 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 m

14、ay 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 prolong

15、ed, 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. About Lead Free Solder / 無鉛 The P

16、.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.” CAUTION F151, F152 : REPLACE WITH SAME TYPE 8A, 125V FUSE. ATTENTION F151, F152 : UTILISER UN FUS

17、IBLE DE RECHANGE DE MEME TYPE DE 8A, 125V. A V SI 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 A Side B SMT REFLOW Process MI FLOW Process Solder Dip Among some types of lead free solder currently available, it is recommended to use one of th

18、e following types for the repair 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 3 AX-497 DPX-1200AX-497 I IMPEDANCE SELECTOR Caution: 1. As the meltin

19、g point temperature of the lead free solder is about 30C to 40C (50F to 70F) higher than that of the lead solder, be sure to use a soldering iron suitable to each solder. 2. If lead solder must be used, be sure to remove lead free solder from each terminal section of the parts to be replaced and fro

20、m the area around it completely before soldering, or make sure that the lead free solder and lead solder melt together fully. 注意： 1. 無鉛融点温度通常鉛入比30 40 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 switch when the unit power is switche

21、d on, as doing so may damage the unit. 注意 切換、 必電源切 行。 電源入行、故障原因。 IMPEDANCE SELECTOR I FRONT PANEL I REMOTE CONTROL PANEL 4 AX-497 AX-497 I REAR PANELS M U, C models M R model M T model 5 AX-497 DPX-1200AX-497 M K model M A model M B model 6 AX-497 AX-497 M G, E models M L model M J model 7 AX-497 DP

22、X-1200AX-497 GENERAL / 総合 Power Supply / 電源電圧 U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . AC 120 V, 60 Hz R model . . . . . . . . . . . . . AC 110/120/220/230-240 V, 50/60 Hz T model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V, 50 Hz K model . . . . . . . .

23、 . . . . . . . . . . . . . . . . . . . . . AC 220 V, 60 Hz A model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240 V, 50 Hz B, G, E models . . . . . . . . . . . . . . . . . . . . . . . . AC 230 V, 50 Hz L model . . . . . . . . . . . . . . . . . . . . AC 220/230-240 V, 50/60 Hz J mod

24、el . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 100 V, 50/60 Hz Power Consumption / 消費電力 U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 W/300VA R, T, K, A, B, G, E, L, J models . . . . . . . . . . . . . . . . . . . 220 W L model . . . . . . . . . . . . . . . . .

25、. . . . . . . . . . . . . . . . . . . . 190 W Standby Power Consumption / 待機時消費電力 U, C, T, K, A, B, G, E, J models . . . . . . . . . . . . . . . . . . . . 1.1 W R model (AC 110/120 V) . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W R, L models (AC 220/230-240 V) . . . . . . . . . . . . . . .

26、 . . . . 2.7 W Maximum Power Consumption R model (1 kHz, 6 ohms, 10% THD) . . . . . . . . . . . . . . . 490 W AC Outlet / AC 3 Switched Outlet R, J models . . . . . . . . . . . . . . . . . . . . . . . . . . 50 W Max. total U, C, T, G, E, L models . . . . . . . . . . . . . . . . 100 W Max. total 1 Sw

27、itched Outlet A, 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

28、 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 1 Battery (Manganese Dry) x 2 * Specifications subject to change without notice. U . USA

29、 model C . Canadian model R . General model T . Chinese model K . Korean model A . Australian model B . British model G . European model E . South European model L . Singapore model J. Japanese model I SPECIFICATIONS / 参考仕様 AUDIO SECTION / 部 Minimum RMS Output Power (Power Amp. Section) / 定格出力 L/R,

30、20 Hz to 20 kHz U, C, R, T, K, A, B, G, E, L, J models (0.019% THD, 8 ohms) . .85 W + 85 W U, C, R, T, K, A, B, G, E, J models (0.038% THD, 6 ohms) . .100 W + 100 W Dynamic Power Per Channel (IHF) / 8/6/4/2 ohms . . . . . . . . . . . . . . . . . . . . . . .130/150/185/220 W Maximum Power Per Channel

31、 (B, G, E models) 1 kHz, 0.7 % THD, 4 ohms . . . . . . . . . . . . . . . . . . . . . . . .120 W IEC Power (B, G, E models) 1 kHz, 0.019% THD, 8 ohms . . . . . . . . . . . . . . . . . . . . . .100 W Power Band Width / L/R, 0.04% THD, 42.5 W, 8 ohms . . . . . . . . . .10 Hz to 50 kHz Damping Factor /

32、20 Hz to 20 kHz, SPEAKER-A, 8 ohms . . . . . . . . .240 or more Maximum Power (EIAJ) / 実用最大出力 1 kHz, 10 % THD R, T, K, L, J models (8 ohms) . . . . . . . . . . . . . . . . . . . . . .130 W R, T, K, J models (6 ohms) . . . . . . . . . . . . . . . . . . . . . . . .150 W Input Sensitivity/Input Impedan

33、ce / 入力感度/ 入力 PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . .2.5 mV/47 k-ohms CD, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . .195 mV/47 k-ohms Maximum Input Signal / 最大許容入力 PHONO MM, 1kHz, 0.003 % THD . . . . . . . . . . . . . . . . .115 mV CD, etc., 1kHz, 0.5 % THD . . .

34、. . . . . . . . . . . . . . . . . . . . .2.2 V Output Level/Output Impedance / 出力電圧/ 出力 REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . .195 mV/1.6 k-ohms Headphone Jack Rated Output/Output Impedance / 出力/ 出力 CD, etc. 1 kHz, 150 mV, 8 ohms, 0.019% THD . . . . . . . .300 mV/680 ohms Frequen

35、cy Response / 周波数特性 CD, etc. 20 Hz to 20 kHz . . . . . . . . . . . . . . . . . . . . . .0 0.5 dB CD/DVD DIRECT AMP ON, 10 Hz to 100 kHz . . . . .0 1.0 dB RIAA Equalization Deviation / RI AA偏差 PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 0.3 dB Total Harmonic Distortion (

36、20 Hz to 20 kHz) / 全高調波歪率 PHONO MM to REC OUT (3 V) . . . . . . . . . . . . . . . .0.003 % or less CD, etc. to SP OUT (42.5 W/8 ohms) . . . . . . .0.009 % or less Signal to Noise Ratio (IHF-A Network) / S/ N比 PHONO MM (Input shorted, 5 mV) . . . . . . . . . .88 dB or more CD (CD DIRECT AMP ON, Input

37、 shorted, 195mV) . . . . . .110 dB or more Residual Noise (IHF-A Network) / 残留 CD DIRECT AMP ON . . . . . . . . . . . . . . . . . . . . .35 V or less PURE DIRECT ON . . . . . . . . . . . . . . . . . . . . . . .90 V or less Channel Separation / CD, etc. (Input 5.1 k-ohms shorted) 1 kHz . . . . . . .

38、. . . . . . . . . . . . . . . . . . . . . . .65 dB or more 10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 dB or more Tone Control Characteristics / 特性 BASSBoost/Cut (20 Hz) . . . . . . . . . . . . .+10 dB/-10 dB Turnover Frequency . . . . . . . . . . . . . . . . .350 Hz TREBLEB

39、oost/Cut (20 kHz) . . . . . . . . . . . .+10 dB/-10 dB Turnover Frequency . . . . . . . . . . . . . . . . .3.5 kHz Continuous Loudness Control / Attenuation (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 dB Gain Tracking Error / 0 to -60 dB . . . . . . . . . . . . . . . . . . .

40、. . . . . . . . . . . .2 dB or less 8 AX-497 AX-497 Unit : mm (inch) DIMENSIONS / 寸法図 I INTERNAL VIEW qMAIN (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

41、.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) ywerti o!6 o !7 q !0!1

42、!8 !0!1!2 !3!4!5 !2 u 9 AX-497 DPX-1200AX-497 I 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、 C

43、B226、 CB302、 CB306、 CB532、 CB581、 CB681外、 取外。 （Fig. 1） 1. Removal of Top Cover a. 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 Unit a. Remove the INPUT knob. b. Remove 1 screw ( r ) and then remove

44、the Support Top. (Fig. 1) c. Remove 7 screws ( t ) and then remove the Front Panel Unit. (Fig. 1) 3. Removal of Plate Side Remove 2 push rivets ( y ) and then remove the Plate Side L/R. (Fig. 1) 4. Removal of Sub Chassis Unit a. Remove 1 push rivet ( u ). (Fig. 1) b. Remove 2 screws ( i ) and then s

45、lide the Sub Chassis Unit 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 Sub Chassis Unit. (Fig. 1) Remove parts in disassembly order as numbered. Disconnect the power cable from the AC out

46、let. Top Cover Front Panel Unit Knob Sub Chassis Unit Support Top Plate Side L L Plate Side R R CB306 CB302 CB532 CB581 CB681 CB221 CB226 r i i u e y y t t q q e w Fig. 1 10 AX-497 AX-497 5. 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）

47、 e. CB3CB151外。 (Fig. 2) f.取外。（Fig. 2） 5. Removal of Amp Unit a. Remove 1 screw ( o ) attaching the Impedance Selector. (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 screw

48、s ( !2 ) and 2 screws ( !3 ). (Fig. 2) e. Remove connectors CB3 and CB151. (Fig. 2) f.Remove the Amp Unit. (Fig. 2) Fig. 2 !0 o !1 !3 !3 !2 Amp Unit MAIN (4) P.C.B. CB3 CB151 Speaker Terminal Impedance Selector 11 AX-497 DPX-1200AX-497 I 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

49、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 CURRENT 1. 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 30.0mV after 60 minutes. R64 R51R52 R65 R