Yamaha-MDX-596-Service-Manual电路原理图.pdf

MDX-596 MDX-596 100718 SERVICE MANUAL MDX-596 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 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 YAMAHA 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 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 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 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 accumu- lated 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 IC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2534 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . 3537 TEST POINT WAVEFORMS . . . . . . . . . . . . . . . 3839 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . 4046 MD VOLTAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . 4850 REMOTE CONTROL TRANSMITTER . . . . . . . . . . .51 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5261 GREASE APPLICATION DIAGRAM . . . . . . . . . . . .62 I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . 12 REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . 46 ADJUSTMENT Read mode :0.8 mW (Continuous) 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 MDX-596 MDX-596 3 I SPECIFICATIONS Units : mm (inch) 265.9 (101/2) 287.8 (115/16) 15.2 (5/8) 6.7 (1/4) 435 (171/8) 16 (5/8) 80 (31/8) 96 (33/4) Digital audio system System MiniDisc digital audio system Disc MiniDisc Recording method Magnetic field variation overwrite Reading method Non-contact optical pickup (using semiconductor laser) Laser Semiconductor laser Laser Diode Properties Material: GaAIAs Wavelength: 785 nm Pulse time: Read mode .0.8 mW Continuous Write mode .max 10 mW 0.5S min cycle 1.5S Repetition Record/playback time Max. 80 minutes 80 minutes (stereo) 160 minutes (mono) Revolutions Approx. 400900 rpm (CLV) Error Correction ACIRC (Advanced Cross Interleave Reed-solomon Code) Sampling frequency 44.1 kHz (32 kHz and 48 kHz signals converted to 44.1 kHz for recording) Coding ATRAC (Adaptive TRansform Acoustic Coding) Modulation system EFM (Eight-to-Fourteen Modulation) Number of channels 2 (stereo) or 1 (mono, for extended recording) Frequency Response 5 20,000 Hz 0.5 dB Signal-to-Noise Ratio More than 99 dB during playback Wow and Flutter Below measurable limit Inputs LINE IN (REC) Type: pin jack Input impedance: greater than 50 k-ohms Standard input level: 300 mV DIGITAL IN (OPTICAL) 1/2 Type: square optical connector jack Outputs LINE OUT (PLAY) Type: pin jack Standard output level: 2.0 0.5 Vrms DIGITAL OUT (OPTICAL) Type: square optical connector jack PHONES Standard output level (Input 150 ohms shorted, 20 dB): 300 60 mV GENERAL Power Supplies A modelAC 240 V, 50 Hz G, B modelsAC 230 V, 50 Hz R modelsAC 110/120/220/240 V, 50/60 Hz Power Consumption 18 W Dimensions (W x H x D) 435 x 96 x 288 mm (17-1/8 x 3-3/4 x 11-5/16) Weight 4.0 kg (8 lbs. 13 oz.) Finish Titanium color/Black color Accessories Remote Control. 1 Audio cord. 2 Optical cord. 1 Batteries (size AA, R6, UM-3). 2 Specifications subject to change without notice. R : General modelA : Australian model B : British modelG : European model * US and foreign patents licensed from Dolby Laboratories Licensing Corporation. MDX-596 MDX-596 I DISASSEMBLY PROCEDURES (Remove parts in disassembly order as numbered.) Fig. 2 4 I INTERNAL VIEW 1. Removal of Top Cover a. Remove 4 screws ( q ) and 3 screw ( w ) in Fig. 1. 2. Removal of Front Panel a. Remove 4 connectors. CB5, CB6, CB7, CB401 b. Remove 3 screws ( e ) in Fig. 1. *Arrow marks ( ) are printed to identify the screws to be removed. c. Remove 2 screws ( r ) in Fig. 1. 3. Removal of MD Recorder Unit a. Remove 1 connector. CB1 b. Remove 4 screws ( t ) in Fig. 1. c. Remove 4 screws ( y ) in Fig. 2. qw ert CB7 CB6 CB1 CB401 CB5 qPOWER TRANSFORMER wMAIN (1) P.C.B. ePOWER SWITCH rMD RECORDER UNIT tMAIN (2) P.C.B. Fig. 1 q q Top Cover w MD Recorder Unit Front Panel r e r t MD Recorder Unit t y y Support (Mechanism) MDX-596 MDX-596 5 Disassembly of MD Recorder Unit Remove the MD Recorder unit according to Steps 1 and 3 of the disassembly procedure (page 4). Removal of Magnetic Head (Fig.4) Once the magnetic head is removed, it will be neces- sary to perform “Confirmation of magnetic head installation Position”. (See page 13.) 1. Remove screw (A1). Caution a. When removing the magnetic head, hold its base 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. Removal of MD Main P.C.B. and MD Mechanism (Fig. 3) 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 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 Mechanism. Fig. 4 Fig. 3 (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 the 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 (A1)x1 1.7x 5mm Magnetic Head Leaf Spring MD Mechanism MDX-596 MDX-596 6 Fig. 5 Removal of MD Loading P.C.B./Loading Motor (Fig. 5) 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 Removal of Sled Motor/Optical Pickup Head (Fig. 6) Once the MD mechanism switch P.C.B. is removed, it will be necessary to perform “Adjustment of Lead-in Switch Position”. (See page 13.) Once the optical pickup head is removed, it will be necessary to perform “Confirmation of magnetic head installation Position”. (See page 13.) 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 any damage to the gear. (The 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 Fig. 6 Removal of Spindle Motor (Fig. 7) Once the spindle motor is removed, it will be neces- sary to perform “Pickup Rating”. (See page 14.) 1. 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. 7 MDX-596 MDX-596 7 TEST MODE 1. How to enter the test mode 1) Press the POWER button while pressing the SET/ENTER button and the PLAY/PAUSE button. Version of microprocessor is displayed about 1 second. t s m 1 C * * e * * Version of EEPROM protect data (from 01) Version of microprocessor ROM (from 01) “EJECT” on display 2) Load either a disc for reproduction or a disc for recording. “AUTO AJST” on display G Extension cable (see connection diagram on page 14.) High reflecting discTDYS1 (SONY) for 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 servicingAAX16620 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 adjustments 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) replacement 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 in which required items should be performed. means that item needs not be performed. (*1): The result of EEPROM entry is displayed at the end of the TEST mode. OK_EEPROM:Both setting value and preliminary adjustment completed have been entered properly. WR_EEPROM:The setting value has been entered properly but not preliminary adjustment completed. Perform preliminary adjustment properly and then enter preliminary adjustment completed. NG_EEPROM:The setting value has not been entered. Check the MD microprocessor and EEPROM for connection. MDX-596 MDX-596 8 3. How to cancel test mode (Entry of EEPROM adjustment value) 1) Be sure to perform AUTO preliminary adjustment, AUTO adjustment and AUTO AFB adjustment. ( “COMPLETE” appears on the display) 2) After completing above ajustments, press the REC button. (Entry to EEPROM initiates then.) The TEST mode is completed. ( “Test End” appears on the display) 3) Press the EJECT button to take out the disc. 4) Turn off the power. 2. How to set to each mode Every time the DISPLAY (forward) or EDIT (reverse) button is pressed, the mode changes. (For operation of each mode, refer to the section describing each mode.) Since this mode is not required for servic- ing , proceed to another mode promptly. * AUTO_AJST (AUTO adjustment) AUT_AFB (AUTO AFB adjustment) RST_YOBI (RESULT preparation) RESULT (RESULT) MNU_YOBI (MANUAL preliminary adjustment) MNU_AJST (MANUAL adjustment) EEPROM_SET (EEPROM setting) AUT_YOBI (AUTO preliminary adjustment) Panel keyFunctionCommand code RECTEST mode end (entry of EEPROM)1FH EJECTEjectB3H DISPLAYMenu feeding in TEST mode (1) / (Feeding of menus mainly related to adjustment and EEPROM)B2H TITLEMenu feeding in TEST mode (2) / (Feeding of menus mainly related to continuous playback and continuous recording)B4H CHARA.Menu feeding in TEST mode (3) (Feeding of menus mainly related to INNER mode and JUMP SELECT)F2H EDITMenu feeding in reverse in TEST mode (Menu feeding in reverse in each TEST mode)A8H SET/ENTERFinalization of menu selection or starting of its executionA2H DELETE/CANCELStopping each test item and shifting to menu selection at one step upper levelA7H SEARCH wForced feeding of the slide (in FWD direction) / Execution of JUMP function (FWD)AAH ADDRESS setting value increased / Specification of direction when setting the tracking SEARCH eForced feeding of the slide (in REV direction) / Execution of JUMP function (REV)ACH ADDRESS setting value reduced / Specification of direction when setting the tracking JOG DIAL yForced feeding of the disc to EJECT / setting value increasedF3H JOG DIAL tForced feeding of the disc to LOAD / setting value reducedF4H INPUTSwitching of laser power at EJECT / switching of display for continuous playback / switching of digit setting when setting ADDRESSF5H RANDOM REPEAT S/F REPEAT A-B SCROLL PLAY/PAUSE STOP G Panel keys used in TEST mode MDX-596 MDX-596 Description of TEST modes 1. EJECT modeTo TEMP setting (of EEPROM setting) _ _ EJECT _ _ _ To CONTROL setting (of EEPROM setting) Laser power setting (record/reproduction power) is performed. 2. AUTO preliminary adjustment modeAutomatic preliminary adjustment is performed. _ AUT _ YOBI _ Adjusted values are output by using the interface. 3. AUTO adjustment modeAutomatic adjustment is performed. (Grating adjustment mode after this adjustment.) AUTO _ AJST _ Adjusted values are output by using the interface. Continuous reproduction is performed. (Error rate on display, jump test) 4. AUTO AFB adjustment modeAutomatic focus balance adjustment is performed. _ AUT _ AFB _ _ Adjusted values are output by using the interface. RESULT preparation modeNot used (Do not use this function as it is not for servicing) _ RST _ YOBI _ RESULT mode (main adjustment)Not used (Do not use this function as it is not for servicing) _ RESULT _ _ _ MANUAL preliminary adjustment modeNot used (Do not use this function as it is not for servicing) _ MNU _ YOBI _ MANUAL adjustment modeNot used (Do not use this function as it is not for servicing) _ MNU _ AJST _ 5. EEPROM setting modeVarious factors of the digital servo function are changed manually. EEPROM _ SET The voltage is measured at the temperature detect terminal and the