sony_MDS-JB930_b_service_manual 维修电路图.pdf

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1、MICROFILM SERVICE MANUAL MINIDISC DECK US Model Canadian Model AEP Model UK Model SPECIFICATIONS MDS-JB930 Model Name Using Similar MechanismMDS-JE520 MD Mechanism TypeMDM-5D BU Base Unit TypeMBU-5D Optical Pick-up TypeKMS-260B/J1N U.S. and foreign patents licensed form Dolby Laboratories Licensing

2、Corporation. Photo: Black model 收音机爱好者资料库 Ra d i o Fa n s .CN 2 SELF-DIAGNOSIS FUNCTION The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details o

3、n how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for using the Self-Diagnosis Function (Error History Display Mode)”. PROCEDURE FOR USING THE SELF-DIAGNOSIS FU

4、NCTION (ERROR HISTORY DISPLAY MODE) Note: Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to e

5、xit the mode. 1.While pressing the AMS knob and p button, connect the power plug to the outlet, and release the AMS knob and p button. 2.Turn the AMS knob and when “Service” is displayed, press the YES button. 3.Turn the AMS knob to display “ERR DP MODE”. 4.Press the YES button to sets the error his

6、tory mode and displays “total rec”. 5.Select the contents to be displayed or executed using the AMS knob. 6.Press the AMS knob to display or execute the contents selected. 7.Press the AMS knob another time returns to step 4. 8.Press the MENU/NO button to display “ERROR DP MODE” and release the error

7、 history mode. 9.To release the test mode, press the FILTER button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS Selecting the Test Mode DisplayDetails of History E00No error E01Disc

8、error. PTOC cannot be read (DISC ejected) E02Disc error. UTOC error (DISC not ejected) E03Loading error E04Address cannot be read (Servo has deviated) Table of Error Codes Error CodeError CodeDetails of Error total recDisplays the recording time. Displayed as “rh”. The displayed time is the total ti

9、me the laser is set to the high power state. This is about 1/4 of the actual recording time. The time is displayed in decimal digits from 0h to 65535h. total playDisplays the play time. Displayed as “ph”. The time displayed is the total actual play time. Pauses are not counted. The time is displayed

10、 in decimal digits from 0h to 65535h. retry errDisplays the total number of retries during recording and number of retry errors during play. Displayed as “r p”. “r” indicates the retries during recording while “p” indicates the retry errors during play. The number of retries and retry errors are dis

11、played in hexadecimal digits from 00 to FF. total errDisplays the total number of errors. Displayed as “total ”. The number of errors is displayed in hexadecimal digits from 00 to FF. err historyDisplays the 10 latest errors. Displayed as “0 E”. indicates the history number. The smaller the number,

12、the more recent is the error. (00 is the latest). indicates the error code. Refer to the following table for the details. The error history can be switched by turning the AMS knob. er refreshMode which erases the “retry err”, “total err”, and “err history” histories. When returning the unit to the c

13、ustomer after completing repairs, perform this to erase the past error history. After pressing the AMS button and “er refresh?” is displayed, press the YES button to erase the history. “Complete!” will be displayed momentarily. Be sure to check the following when this mode has been executed. The dat

14、a has been erased. The mechanism operates normally when recording and play are performed. tm refreshMode which erases the “total rec” and “total play” histories. These histories serve as approximate indications of when to replace the optical pick-up. If the optical pickup has been replaced, perform

15、this operation and erase the history. After pressing the AMS button and “tm refresh?” is displayed, press the YES button to erase the history. “Complete!” will be displayed momentarily. Be sure to check the following when this mode has been executed. The data has been erased. The mechanism operates

16、normally when recording and play are performed. E05FOK has deviated E06Cannot focus (Servo has deviated) E07Recording retry E08Recording retry error E09Playback retry error (Access error) E0APlayback retry error (C2 error) Details of Error 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 1 SERVICING NOTES SA

17、FETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety check before 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. LEAKAG

18、E TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed 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

19、 Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2.A battery-operated 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. Th

20、e “limit” indica- tion is 0.75 V, so analog meters must have an accurate low- voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex- amples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suit- able. (See Fig. A) Fig. A.Using an AC v

21、oltmeter to check AC leakage. 1.5 k0.15 F AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground MODEL IDENTIFICATION BACK PANEL TABLE OF CONTENTS SELF-DIAGNOSIS FUNCTION.2 1.SERVICING NOTES.4 2.GENERAL. 11 3.DISASSEMBLY. 13 4.TEST MODE. 17 5.ELECTRICAL ADJUSTMENTS. 22 6.DIAGRAMS 6-1.Block

22、 Diagram SERVO Section . 31 6-2.Block Diagram MAIN Section . 32 6-3.Note for Printed Wiring Boards and Schematic Diagrams . 33 6-4.Printed Wiring Board BD Board . 35 6-5.Schematic Diagram BD Board (1/2) . 36 6-6.Schematic Diagram BD Board (2/2) . 37 6-7.Schematic Diagram SW Board . 38 6-8.Printed Wi

23、ring Board SW Board . 38 6-9.Schematic Diagram MAIN (1/3) /BAT Boards . 39 6-10. Schematic Diagram MAIN Board (2/3) . 40 6-11. Schematic Diagram MAIN Board (3/3) . 41 6-12. Printed Wiring Board MAIN Board (Side A) . 42 6-13. Printed Wiring Boards MAIN Board (Side B), BAT Board . 43 6-14. Printed Wir

24、ing Board AC Board . 44 6-15. Schematic Diagram AC Board . 45 6-16. Printed Wiring Boards PANEL Section . 46 6-17. Schematic Diagram PANEL Section . 47 6-18. IC Pin Function Description . 54 7.EXPLODED VIEWS. 61 8.ELECTRICAL PARTS LIST. 65 Part No. ModelPart No. AEP, UK models4-998-603-6 US model4-9

25、98-603-7 Canadian model4-998-603-8 5 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur- ing 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

26、 or unsoldering. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av appara

27、tfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner. VARNING Explosionsfara vid felaktigt batteribyte. Anvnd samma batterityp eller en likvrdig typ som rekommenderas av apparattillverkaren. Kassera anvnt batteri enligt gllande freskrifter. VAROITUS Paristo voi rjht, jos

28、se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti. ADVARSEL! Lithiumbatteri-Eksplosionsfare ved fejlagtig hndtering. Udskiftning m kun ske med batteri af samme fabrikat og type. Levr det brugte bat

29、teri tilbage til leverandren. CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturers instruc- tions. CAUTION Use of controls or adjustments or performance of

30、procedures other than those specified herein may result in hazardous ra- diation exposure. Laser component in this product is capable of emitting radia- tion exceeding the limit for Class 1. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PROD- UCT MARKING is located on th

31、e rear exterior. This caution label is located inside the unit. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PI

32、CES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY P

33、ARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. Durin

34、g repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to

35、be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT 6 JIG FOR CHECKING BD BOARD WAVEFORM

36、The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. GND: Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deter

37、ioration of the optical pick-up laser) TEO : TRK error signal (Traverse adjustment) VC: Reference level for checking the signal RF: RF signal (Check jitter) CN110 RF 5P Connector 6P connector VCTEO IOP I+3V GND Mechanism deck RF VC TEO for MDM-3 for MDM-5 IOP I+3V VC RF TEO IOP I+3V GND VC RF TEO IO

38、P I+3V GND 1 5 1 6 7 IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OF BD BOARD) ARE REPLACED The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the op

39、tical pick-up label. When replacing the optical pick-up or non-volatile memory (IC171 of BD board), record the IOP value on the optical pick-up according to the following procedure. Record Procedure: 1.While pressing the AMS knob and p button, connect the power plug to the outlet, and release the AM

40、S knob and p button. 2.Turn the AMS knob to display “Service”, and press the YES button. 3.Turn the AMS knob to display “lop Write” (C28), and press the YES button. 4.The display becomes “Ref=.” ( is an arbitrary number) and the numbers which can be changed will blink. 5.Input the IOP value written

41、on the optical pick-up label. To select the number: Turn the AMS knob. To select the digit: Press the AMS knob. 6.When the YES button is pressed, the display becomes “Measu=.” ( is an arbitrary number). 7.As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES but

42、ton. 8.“Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”. 9.Press the FILTER button to complete. Display Procedure: 1.While pressing the AMS knob and p button, connect the power plug to the outlet, and release the

43、 AMS knob and p button. 2.Turn the AMS knob to display “Service”, and press the YES button. 3.Turn the AMS knob to display “lop Read” (C27). 4.“./#.#” is displayed and the recorded contents are displayed. .: indicates the IOP value on the optical pick-up label. #.#: indicates the IOP value after adj

44、ustment 5.To end, press the AMS knob or MENU/NO button to display “Iop Read”. Then press the FILTER button. FORCED RESET The system microprocessor can be reset in the following procedure. Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.

45、 Procedure : Disconnect the power plug, short-circuit jumper wire of JW705 and JW706 (RESET). BAT BOARD (Component Side) JW706JW705 CN703 8 CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS Before performing repairs, perform the following checks to determine the faulty locations up to a certain exte

46、nt. Details of the procedures are described in “5 Electrical Adjustments”. 0.9 mW power Specified value : 0.84 to 0.92 mW 7.0 mW power Specified value : 6.8 to 7.2 mW lop (at 7mW) Labeled on the optical pickup Iop value 10mA Traverse waveform Specified value : Below 10% offset Error rate check Specified value : For points a, b, and c C1 error : About 200 AD error : Above 00 Error rate check Specified value: a. When using test disc (MDW-74/AU-1) C1 error : Below 80 AD error : Below 2 b.When using check disc (TDYS-1) C1 error : Below 50 CPLAY error rate check Specified value: C1 error