sony_mdsja555es_service 维修电路图.pdf

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1、SERVICE MANUAL MINIDISC DECK MICROFILM Continued on next page SPECIFICATIONS US Model Canadian Model AEP Model UK Model Model Name Using Similar MechanismMDS-JA20ES MD Mechanism TypeMDM-6A Base Unit TypeMBU-5C Optical Pick-up TypeKMS-260B/J1N MDS-JA555ES U.S. and foreign patents licensed from Dolby

2、Laboratories Licensing Corporation. Photo : GOLD SystemMiniDisc digital audio system DiscMiniDisc LaserSemiconductor laser (=780 nm) Emission duration : continuous Laser outputLess than 44.6 W* * This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical

3、 Pick-up Block with 7 mm aperture. Laser diode properties Material: GaAlAs Revolutions (CLV)400 rpm to 900 rpm Error correctionACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz CodingATRAC (Adaptive TRansform Acoustic Coding) Modulation systemEFM (Eight-to-Fourteen Modu

4、lation) Number of channels 2 stereo channels Frequency response 5 Hz to 20,000 Hz 0.3 dB Signal-to-noise ratio Over 105 dB during playback Wow and flutterBelow measurable limit Inputs JackInputRatedMinimum typeimpedanceinputinput LINEPhono (ANALOG)jacks47 k500 mVrms125 mVrms IN DIGITALSquareOptical

5、wave INopticallength OPT1connector660 nm jack DIGITALSquareOptical wave INopticallength OPT2connector660 nm jack DIGITALPhono0.5 Vp-p INjack 75 20% COAXIAL 收音机爱好者资料库 Ra d i o Fa n s .CN 2 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DI

6、AGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCH

7、MATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PISES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPMENTS PUBLIS PAR SONY. After correcting the original service problem, perform the following safety checks befor

8、e releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exp

9、osed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2.A battery-opera

10、ted AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and

11、Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT To Exposed Metal Parts on Set 0.15 F 1.5 k AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC l

12、eakage. CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the equipment manufacturer. Discard used batteries according to manufactures instructions. ADVARSEL! Lithiumbatteri - Eksplosionsfare ved fejlagtig hndtering. Udskiftn

13、ing m kun ske med batteri af samme fabrikat og type. Levr det brugte batteri tilbage til leverandren. ADVARSEL Eksplosjonsfare ved feilakting skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier katterier kasseres i henhold til fabrik

14、antens VARNIG Explosionsfara vid felaktigt batteribyte. Anvnd samma batterityp eller en likvrdig typ som rekommenderas av apparattillverkaren. Kassera anvnt batteri enligt gllande freakrifter. VAROITUS Parist voi rjht, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan su

15、osittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti. Output JackRatedLoad typeoutputimpedance PHONESStereo phone28 mW32 jacks LINE(ANALOG)Phono2 VrmsOver OUTjacks(at 50 k)10 k DIGITAL OUTSquare18 dBmOptical OPTICALopticalWave length connector660 nm jack DIGITAL OUTPhono0.5 Vp

16、-p75 COAXIALjack(at 75 ) General Power requirements Where purchasedPower requirements Continnental Europe and UK220V 230V AC, 50/60 Hz U.S.A. and Canada120 V AC, 60 Hz Power consumption24 W Dimensions (approx.)(w/h/d) incl. projecting parts and controls 430 125.5 375.5 mm (17 5 13 3/4 in.) Mass (app

17、rox.)15.3 kg (33 lbs 11 oz) Supplied accessories Audio connecting cords (2) Remote commander (remote) RM-D34M (1) R6 (size-AA) batteries (2) Design and specifications are subject to change without notice. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 This appliance is classified as a CLASS 1 LASER product. The CL

18、ASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside the unit. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. CAUTION Use of controls or adjustments or performance of procedures other than those

19、specified herein may result in hazardous radiation exposure. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of soldering iron around 270C d

20、uring repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. MODEL IDENTIFICATION BACK PANEL Parts No. 4-220-300-1 : AEP, UK model 4-220-300-2 : US model 4-220-300-3 : Canad

21、ian model TABLE OF CONTENTS 1. SERVICING NOTE 6 2. GENERAL 12 3. DISASSEMBLY 3-1.Case 14 3-2.Loading Panel14 3-3.Front Panel Assembly15 3-4.MD Mechanism Deck 15 3-5.Tray Assembly16 3-6.BU Holder Assembly 17 3-7.Motor (Loading) Assembly (M10) 17 3-8.Base Unit (MBU-5C) 18 3-9.BD Board18 3-10. Over Lig

22、ht Head (HP901) 19 3-11. Mini Disc Device (KMS-260B/JN)19 4. TEST MODE 20 5. ELECTRICAL ADJUSTMENTS25 6. DIAGRAMS 6-1.Block Diagrams BD Section 34 MAIN Section 35 Display/Power Supply Section 36 6-2.Circuit Boards Location 37 6-3.Printed Wiring Board BD Section 38 6-4.Schematic Diagram BD (2/1) Sect

23、ion 39 6-5.Schematic Diagram BD (2/1) Section 40 6-6.Schematic Diagram BD Switch Section41 6-7.Printed Wiring Board BD Switch Section 41 6-8.Printed Wiring Board AD Section 42 6-9.Schematic Diagram AD (2/1) Section 43 6-10. Schematic Diagram AD (2/1) Section 44 6-11. Schematic Diagram DA (2/1) Secti

24、on 45 6-12. Printed Wiring Board DA Section 48 6-13. Schematic Diagram DA (2/1) Section 47 6-14. Printed Wiring Board Digital Section 48 6-15. Schematic Diagram Digital Section 50 6-16. Printed Wiring Board AC Section 51 6-17. Schematic Diagram Power Section 52 6-18. Printed Wiring Board Power Secti

25、on 53 6-19. Printed Wiring Board Panel Section54 6-20. Schematic Diagram Panel Section 55 6-21. IC Block Diagrams57 6-22. IC Pin Functions62 7. EXPLODED VIEWS 7-1.Upper Case Assembly 71 7-2.Front Panel Assembly72 7-3.Chassis Assembly 73 7-4.Mechanism Deck Assembly-1 (MDM-6A) 74 7-5.Mechanism Deck As

26、sembly-2 (MDM-6A) 75 7-6.Base Unit (MBU-5C) 76 8. ELECTRICAL PARTS LIST77 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SELF-DIAGNOSIS FUNCTION The self-diagnosis function consists of the error codes for users and those for service engineers. The error codes for users appear automati- cally when an error occurs.

27、The error codes for service engineers can be accessed by entering the test mode during servicing and by viewing the error history display. The error codes for users are shown below that are extracted from Operation Manual. For the error codes for service engineers, refer to the subsequent paragraph

28、“How to Operate the Self-diagnosis Function (Error History Display Mode)”. How to Operate Self-diagnosis Function (Error History Display Mode) Note:The self-diagnosis function is performed using the “error history display mode” using the test mode. The following procedure describes only the minimum

29、required operating procedure to enter the error history mode. Therefore be careful not to enter any other modes by mistake. If you have entered any other modes by mistake, press the MENU/NO button and exit the mode. 1.While pressing the lAMSL knob and the x button at the same time, connect the AC po

30、wer plug to the wall outlet, then remove your hands from the lAMSL knob and x button at the same time. When the MDS-JA555ES enters the test mode, the message “Check” appears and the STANDBY, PITCH CONTROL, and FILTER LEDs turn on. 2.Rotate the lAMSL knob until the message “Service” appears. Then pre

31、ss the YES button. 3.Rotate the lAMSL knob until the message “ERR DP MODE” appears. 4.Press the YES button to enter the error history mode and the message “total rec” appears. 5.Select the desired item to display or to execute using the lAMSL knob. 6.Press the lAMSL knob to display or execute the se

32、lected item. 7.Pressing the lAMSL knob again returns to the display of step 4. 8.To exit the error history mode, press the MENU/NO button. The message “ERR DP MODE” appears to exit the error history mode. 9.To exit the test mode, press the REPEAT button. The test mode display disappears and the PITC

33、H CONTROL and FILTER LEDs are turned off. The MDS-JA555ES enters the standby state exiting the test mode. While pressing the ?/1 button, turn on the main power. The message “Initialize” flashes and the MDS-JA555ES is initialized. 5 Displaying Contents of the Error History Display on screen total rec

34、 total play retry err total err err history er refresh tm refresh Contents of error history Displays the recording time. The display appears in “r h”. This is the accumulated time when the laser is in the “high power” operation. This is about 1/4 of the actual recording time. The time is shown in th

35、e range of 0h to 65535h in hexadecimal number. Displays the playback time. The display appears in “p h”. This is the accumulated time of actual playback in which pause time is not counted. The time is shown in the range of 0h to 65535h in hexadecimal number. Displays the accumulated count of record

36、retry errors and playback retry errors. The display appears in “r p ”. “r” indicates the record retry error count, and “p” indicates the playback retry error count. The retry count is shown in the range of 00 to FF in hexadecimal number. Displays the total error count. The message “total ” appears.

37、The count is shown in the range of 00 to FF in hexadecimal number. Displays the error contents from the latest error to the last ten errors. “0 E” appears. The history number is shown in . The smaller number means the newer history. (00 is the newest error.) The error code is indicated by . Refer to

38、 the following table for the contents of the error codes. The error histories can be switched by rotating the lAMSL knob. This mode is used to delete the histories of “retry err”, “total err”, and “err history”. Before returning the repaired product to the customer, perform this operation to delete

39、the past error history. To delete the history, press the lAMSL knob and press the YES button after “er refresh?” appears. “Complete!” appears for a moment and returns to the ERR DP MODE. When this mode is executed, be sure to check the following. The data have been deleted. Perform recording and pla

40、yback. Check that the mechanism operates normally. This mode is used to delete the histories of “total rec” and “total play”. These histories are used as reference when replacing the optical pick-up. When the optical pick-up is replaced, perform this operation to delete the histories. Press the lAMS

41、L knob. After “tm refresh?” appears, press the YES button to delete the histories. “Complete!” appears for a moment and returns to the ERR DP MODE. When this mode is executed, be sure to check the following. The data have been deleted. Perform recording and playback and check that the mechanism oper

42、ates normally. Error code table Error codeError contents E00No errors E01Disc error Cannot read PTOC (Disc is ejected) E02Disc error UTOC error (Disc is not ejected) E03Loading error E04Cannot read the address (Out of servo) Error codeError contents E05Out of FOK E06Focus does not lock (Out of servo

43、) E07Record retry E08Record retry error E09Playback retry error (Access error) E0APlayback retry error (C2 error) 6 SECTION 1 SERVICING NOTE 1 Remove the 16 screws (BVTT3 x 8) from the bottom plate. (Refer to Section 3 “Disassembly” Loading panel.) (page 14) 2 Remove the bottom plate. 3 Rotate the p

44、ully gear in the direction of the arrow A and open the tray in the direction of the arrow B. 4 When checking the laser power, remove beforehand the loading panel by removing the two screws (M2.6) and sliding aside the loading panel becouse the cable of the laser power meter can be pinched by the loa

45、ding panel. (Refer to Section 3 “Disassembly” Loading panel.) (page 14) Forced Reset Use this function when the MDS-JA555ES cannot be operated normally due to hung-up of the microprocessor. It is recommended to use this function when you cannot exit the test mode or the retry-cause-display mode, or

46、when the normal operation cannot be performed after the MDS-JA555ES is disassembled once then re-assembled. Procedure : Remove the AC power plug from the wall outlet. Short-circuit pin-1 and pin-3 of CN703 on the BT board with a pair of tweezers or the like, to discharge the back-up battery. HOW TO

47、OPEN THE DISC TRAY WHEN POWER SWITCH IS TURNED OFF, AND LASER POWER CHECK A B Pulley gear Tray assembly Two screws (M2.6) Remove the Loading panel BT board (Conductor side) CN703 JW790 JW791 13 BT701 7 BD Board Waveform Check Tool Use of the exclusive tool (J-2501-149-A) is convenient to check the w

48、aveforms on the BD board. GND : Ground terminal I+3V : For measuring IOP (Checking deterioration of the optical pickup laser) IOP: For measuring IOP (Checking deterioration of the optical pickup laser) TEO: TRK error signal (traverse adjustment) VC: Reference level for when checking signals RF: RF s

49、ignal (jitter check) RFVC TEO IOP I+3V GND 5pin connector CN110 6pin connector Schematic diagram of the connecting tools To MDM-5 To MDM-6 RF VC TEOTo MDM-3 IOP I-3V VC RF TEO IOP I+3V GND VC RF TEO IOP I+3V GND 1 5 1 6 8 How to Record and Display the IOP Data When Replacing the Optical Pick-up and Non-volatile Memory (BD Board IC171) The IOP data that is indicated on the optical pick-up, can be saved in the non-volatile memory of the MDS-JA555ES. Saving the IOP data in the memory eliminates the