Yamaha-MDXE-300-Service-Manual电路原理图.pdf

《Yamaha-MDXE-300-Service-Manual电路原理图.pdf》由会员分享，可在线阅读，更多相关《Yamaha-MDXE-300-Service-Manual电路原理图.pdf（80页珍藏版）》请在收音机爱好者资料库上搜索。

1、100806 SERVICE MANUAL MDX-E300 IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherant to the industry, and more specifically YAMAHA Products, are already known and understood by

2、 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 expensive components and failure of the product to perform as specified. For these reasons, we advise all YA

3、MAHA product owners that all service 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 te

4、chnical 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 are continually striving to improve YAMAHA products. Modifica

5、tions are, therefore, inevitable 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 y

6、our body may have accumulated 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 parts replacement. Recheck all work before you apply power to the unit. MINIDISC RECORDER For the system operation of

7、MDX-E300, please refer to Service Manual #100805 for the CRX-E300/NX-E300. M J modelM R, G, B model 本機 動作 、CRX-E300/NX-E300 100805 覧。 MDX-E300 RadioFans.CN 收音机爱 好者资料库 MDX-E300 2 MDX-E300 ITO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked Z a

8、nd must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. GMeter impedan

9、ce should be equivalent to 1500 ohm shunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. AC LEAKAGE TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL OUTLET WARNING: CHEMICAL CONTENT NOTICE! The solder used in the p

10、roduction 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 reproducti

11、ve harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER! Avoid prolonged, 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

12、components located inside the enclosure of this product, wash your hands before handling food. THE MINI DISC RECORDER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY QUALIFIED SERVICE PERSONNEL. TROUBLESHOOTING . . . . .3645 IC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、. . . . .4655 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . .5657 TEST POINT WAVEFORMS . . . . . . . . . . . . . . . . . . .58 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . .5962 MD VOLTAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62 SCHEMATIC DIAGRAM . . . . . .

14、 . . . . . . . . . . . . .6364 DISPLAY DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6677 GREASE APPLICATION DIAGRAM . . . . . . . . . . . .78 REMOTE CONTROL TRANSMITTER . . . . . . . . . . .79 PARTS LIST FOR CARB

15、ON RESISTORS . . . . . . .80 I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . .23 PREVENTION OF ELECTRO STATIC DISCHARGE . . . . . .4 REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 DIME

16、NSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 DISASSEMBLY PROCEDURES 分解手順 . . . . . .78 DISASSEMBLY OF MD RECORDER UNIT MD分解 . . . . . . . . . . . . . . . . . . .911 ADJUSTMENT Read mode :0.6 mW (Conti

17、nuous) Write mode :Max 10 mW for 0.5s, Min. Cycle 1.5s ANSI Class :Class 1 * This output is the value measured at a distance of about 200 mm from the objective lens surface on the Optical Pick-up Block. Magnetic head Optical pick-up R, G, B models R, G, B models MDX-E300 4 MDX-E300 I PREVENTION OF E

18、LECTRO STATIC DISCHARGE The laser diode in the MD recorder unit (optical pickup) may be damaged due to static electricity from clothes or the human body. Use caution to prevent electrostatic damage when servicing or handling the laser diode. 1. Grounding for electrostatic damage prevention 1. Workta

19、ble grounding Put a grounded conductive material (sheet) or iron sheet on the area where the optical pickup is placed. 2. Human body grounding Use an anti-static wrist strap to discharge the static electricity from your body. 2. Handling of the optical pickup Do not use a tester to check the laser d

20、iode in the optical pickup. The power supply in the tester will damage the laser diode. 3. Handling Precautions for the MD recorder Unit (Optical Pickup) 1. Handle the MD recorder unit (optical pickup) gently, as it is an extremely high-precision assembly. 2. The flexible cable lines may break if an

21、 excessive force is applied to it. Use caution when handling the cable. 3. The semi-fixed resistor for laser power adjustment should not be adjusted. Do not turn the resistor. 1M Conductive material (sheet) or steel sheet Anti-static wrist strip I REAR PANELS M R model M B model M G model M J model

22、MDX-E300 MDX-E300 5 I SPECIFICATIONS Digital audio system System形式 MiniDisc digital audio system Disc MiniDisc Recording method記録方式 Magnetic field variation overwrite Reading method再生読取方式 Non-contact optical pickup (using semiconductor laser) Laser Semiconductor laser Record/playback time録音再生時間 Max.

23、 80 min. (on stereo) Max. 161 min. (on ATRAC3-LP2) Max. 323 min. (on ATRAC3-LP4) Revolutions 回転数 Approx. 400-900 rpm (CLV) Error Correction訂正方式 ACIRC (Advanced Cross Interleave Reed-solomon Code) Sampling frequency周波数 44.1 kHz (32 kHz and 48 kHz signals converted to 44.1 kHz for recording) Coding AT

24、RAC (Adaptive TRansform Acoustic Coding) Modulation system変調方式 EFM (Eight-to-Fourteen Modulation) Number of channels数 2 (stereo) or 1 (mono, for extended recording) Frequency Response周波数特性 5 - 20,000 Hz 0.5 dB Signal-to-Noise RatioSN比 More than 99 dB during playback Wow and Flutter Below measurable

25、limit Inputs LINE IN (REC) 入力 Type: pin jack Input impedance: greater than 50 k-ohms Standard input level: 300 mV DIGITAL IN (OPTICAL) 1/2 入力（光）1/2 Type: square optical connector jack Outputs LINE OUT (PLAY) 出力 Type: pin jack Standard output level: 2.0 0.5 Vrms DIGITAL OUT (OPTICAL) 出力（光） Type: squa

26、re optical connector jack GENERAL Power Supplies電源 G, B models230 V, 50 Hz R model110/120/220/240 V, 50/60 Hz J model100 V, 50/60 Hz Power Consumption消費電力 R, G, B models12W J model11W Dimensions (W x H x D)外形寸法（幅x高x奥行） 217 x 88 x 297 mm (8-9/16 x 3-7/16 x 11-11/16) Weight重量 2.6 kg (5 lbs. 11 oz.) Fi

27、nish仕上 Silver colorB, G, J models Gold colorR, G models Accessories付属品 Remote Control. 1 Audio Pin Cable. 2 Optical Cable. 1 Batteries (AA, R6, UM-3). 2 Specifications subject to change without notice. B : British model G : European model R : General model J : Japanese model MDX-E300 6 MDX-E300 I IN

28、TERNAL VIEW qMAIN (3) P.C.B. wMAIN (4) P.C.B. eMAIN (1) P.C.B. rMD RECORDER UNIT tMAIN (2) P.C.B. e rt wq I DIMENSIONS Unit : mm (inch) 217 (8-9/16) 8 (5/16) 80 (3-1/8) 88 (3-4/16) 12 (1/2) 10 (3/8) 275 (10-13/16) 297 (11-11/16) MDX-E300 MDX-E300 7 CB602 CB1 CB6 I DISASSEMBLY PROCEDURES分解手順 1. Remov

29、al of Top Cover Remove 4 screws ( q ) and 4 screw ( w ) in Fig. 1. 2. Removal of Front Panel a. Remove 2 connectors (CB6, CB602) in Fig. 2. b. Remove 2 screws ( e ) and 2 screws ( r ) in Fig. 1. c. Detach the 2 hooks in Fig. 1 and then pull the Front Panel forward. 3. Removal of MD Recorder Unit a.

30、Remove 1 connector (CB1) in Fig. 2. b. Remove 4 screws ( t ) in Fig. 1. c. Remove the MD Recorder Unit. 1. 外方 q4本w4本外。（Fi g. 1） 2. 外方 a.2所 (CB6, CB602)外。（Fi g. 2） b.e2本r2本外。（Fi g. 1） c.両外、 引出。 3. MD外方 a.1所(CB1)外。（Fi g. 2） b.t4本外。（Fi g. 1） c.MD取外。 Remove parts in disassembly order as numbered. (番号順取外

31、行。） Fig. 1 Fig. 2 q q w w w t t e e r Hook Hook Top Cover Front Panel MD Recorder Unit MD MDX-E300 8 MDX-E300 G a. y 2 本外。 （Fi g. 3） b. u 2 本外。 （Fig. 4） c. Mai n (1) P. C. B.外。 d. Mai n (1) P. C. B. Mai n (4) P. C. B.Fi g. 5 置、動作行。 G Service Position a. Remove 2 screws (y) in Fig. 3. b. Remove 2 scr

32、ews (u) in Fig. 4. c. Remove the Main (1) P.C.B. from the chassis. d. Place the Main (1) P.C.B. and Main (4) P.C.B. as shown in Fig. 5 for servicing. Fig. 3 Fig. 4 Fig. 5 MAIN (1) MAIN (4) y u u Cloth P.C.B. 場合 Main (4) P.C.B. ST1 線等接続 。 When checking the P.C.B.: Be sure to connect the ST1 of the Ma

33、in (4) P.C.B. to the chassis with a jumper wire or the like. （1） （4） 布 ST1 Chassis MDX-E300 MDX-E300 9 Removal of MD Main P.C.B. and MD Mechanism (Fig. 6) 1. Remove 3 screws (K1) and then remove the Top Cover. 2. Remove 2 screws (K2) and then remove the Bottom Cover. 3. Disconnect 3 flat connecting

34、cables (K3). 4. Disconnect the flexible P.C.B. for the optical pickup (K4). 5. Disconnect a connector (K5). 6. Remove 2 screws (K6) and then remove the MD Main P.C.B. 7. Remove the spring (K7). 8. Remove 1 screw (K8) and then remove the Side Cover. 9. Remove 4 cushions (K9) from the bosses of the MD

35、 Mechanism. Remove the MD Recorder unit according to Steps 1 and 3 of the disassembly procedure. I DISASSEMBLY OF MD RECORDER UNITMD分解 MD基板MD外方 （Fig. 6参照） 1. （K1） 3本外、 （） 外。 2. （K2） 2本外、 （） 外。 3. （K3） 3個外。 4. 光用基板 （K4） 1個外。 5. （K5） 1個外。 6. （K6） 2本外、MD基板外。 7. （K7） 1個外。 8. （K8） 1本外、 （） 外。 9. （K9） 4個MD

36、外。 分解手順従MD取外 。 Fig. 6 (K3)x2 (K2)x1 2x 2mm (K1)x1 2x 3mm (K1)x1 2x 3mm (K1)x1 2x 3mm (K3)x1 (K5)x1 (K2)x1 2x 3mm (K6)x2 1.7x 3mm (K4)x1 (K8)x1 2x 3mm (K7)x1 Top Cover MD Mechanism Cushion Cushion Side Cover MD Main P.C.B. Flexible P.C.B. for optical pickup (*1) Bottom Cover (*1) After pulling off th

37、e flexible P.C.B. for the optical pickup from the connector, cover its end with aluminum foil or the like which is electrically conductive so as to prevent the optical pickup from being damaged by static electricity. Pull Pull Spring (K9)x2 (K9)x2 Boss Boss (*1)光用 基板 引抜 後、静電気光 破壊防止 、基板先端導 電性箔等包 。 引

38、引 （） 光用基板 (*1) MD基板 （） MD （） MDX-E300 10 MDX-E300 Removal of Magnetic Head (Fig. 7) Once the magnetic head is removed, it will be neces- sary to perform “Confirmation of magnetic head installation Position”. (See page 26.) Remove screw (A1). Caution a. When removing the magnetic head, hold its base

39、and do not touch the magnetic head itself or the leaf spring. b. Place the magnetic head upside down. c. Use special care so as not to cause any damage to the magnetic head when installing it. Fig. 7 (A1)x1 1.7x 5mm Magnetic Head Leaf Spring MD Mechanism 磁気 MD Fig. 8 Removal of MD Loading P.C.B./Loa

40、ding Motor (Fig. 8) 1. Remove 1 screw (B1). 2. Remove 3 hooks (B2) and then remove the MD Loading P.C.B. 3. Remove 2 screws (B3) and then remove the Loading Motor. (B3)x2 1.7x 3mm (B1)x1 1.7x 6mm (B2)x2 (B2)x1 MD Loading P.C.B. Loading Motor MD基板 磁気外方 （Fig. 7参照） 磁気外場合、 磁気取付位置 確認必要。 （27参照） （A1） 1本外。

41、注意 a. 磁気外、磁気部分持 外。磁気部部 。 b.磁気置場合、裏向置。 c.取付時磁気傷十分注意 。 MD基板外方 （Fig. 8参照） 1. （B1） 1 本外。 2. 爪 （B2） 3箇所外、MD基板外 。 3. （B3） 2本外、外。 MDX-E300 MDX-E300 11 Removal of Sled Motor/Optical Pickup Head (Fig. 9) Once the MD mechanism switch P.C.B. is removed, it will be necessary to perform “Adjustment of Lead-in Sw

42、itch Position”. (See page 26.) Once the optical pickup head is removed, it will be necessary to perform “Confirmation of magnetic head installation Position”. (See page 26.) 1. Remove 3 screws (C1) and then remove the sled motor. 2. Remove the Optical Pickup Head. Caution Use care so as not to cause

43、 any damage to the gear. (A damaged gear will cause abnormal noise to occur while searching.) (C1)x2 1.4x 4.5mm (C1)x1 1.4x 5mm Sled Motor MD Mechanism P.C.B. Optical Pickup Head 光 MD基板 Fig. 9 Removal of Spindle Motor (Fig. 10) Once the spindle motor is removed, it will be neces- sary to perform “Pi

44、ckup Rating”. (See page 28.) Remove 3 screws (D1) and then remove the Spindle Motor. Caution a. Be careful not to scratch the gear. (Scratched gear will produce noises during searching.) b.As the turn-table is magnetized, keep foreign objects from being attracted. (D1)x3 1.4x 3mm Spindle Motor Fig.

45、10 光外方 （Fig. 9参照） MD基板外、 位置 調整必要。 （27参照） 光外、 磁気位置 確認 必要。 （27参照） 1. （C1） 3本外、外。 2. 光外。 注意）傷注意。 （傷、 時異音発生為） 外方 （Fig. 10参照） 外、 調整 必要。 （29参照） （D1） 3本外、 外。 注意 a. 傷注意。 （傷、 時異音発生為） b. 磁化、異物吸着 。 MDX-E300 12 MDX-E300 G Extension cable (see connection diagram on page 28.) High reflecting discTDYS1 (SONY) for

46、reproduction (P/No. TX945850) Low reflecting discCommercially available mini disc for recording Low reflecting discMMD-318 for pre-adjustment (P/No. AAX04890) Clear disc for checking the head (P/No. AAX18050) TypeTest disc 1. Extension P.C.B. for servicingAAX16660 2. 2-pin extension connector for se

47、rvicingAAX16620 3. 6-pin flat cable for servicingAAX16640 4. 5-pin flat cable for servicingTX946190 5. 28-pin flat cable for servicingTX946220 TypePart No. I ADJUSTMENT & TEST MODE Preparation before Adjustment G Test disc Servicing Procedure Perform adjustment and setup in the TEST mode. Specific a

48、djustments and procedures vary depend- ing on the type of servicing performed. Type of servicing PICKUP replacement Magnetic head replacement Mechanical unit replacement (including PICKUP) MD main PCB replacement MD microprocessor (IC1401) replacement MD LSI (IC1201) replacement RF IC (IC101) replac

49、ement EEPROM IC (IC1402) replacement TEMP standard setting TEMP q q q EEPROM setting value confirmation EEPROM SET q q w q _ w w AUTO preliminary adjustment AUT YOBI w w e q e e AUTO adjustment AUTO AJST e e r _ w r r AUTO AFB adjustment AUT AFB r r t _ e t t EEPROM adjustment value entry (*1) TEST mode cancel t t y w r y y Operation confirmation (With AUTO main adjustment done in advance) TEST-PLAY y y u e t u u TEST-REC u q u i r y i i Required item Numbers in the table, e.g., q, w, e, indicate the order