sony_MDS-W1_service_manual 维修电路图.pdf

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1、 1 MICROFILM MDS-W1 SPECIFICATIONS SERVICE MANUAL MINIDISC DECK Continued on next page Model Name Using Similar MechanismMDS-JE520 MD Mechanism TypeMDM-5B Optical Pick-up TypeKMS-260A/J1N AEP 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

2、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 on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error co

3、des during servicing, refer to the following “Procedure for using the Self- Diagnosis Function (Error History Display Mode)”. Procedure for using the Self-Diagnosis Function (Error History Display Mode). Note: Perform the self-diagnosis function in the “error history display mode” in the test mode.

4、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 exit the mode. As this unit uses two mechanism Deck A and Deck B, it carries out self-diagnosis for each deck. For buttons or knobs n

5、ot specified as (Deck A) or (Deck B) in the procedure, use that of the corresponding deck. 1. With the power ON, press the 0 (Deck B) button while pressing the OUTPUT and CLEAR (Deck A) buttons together. 2. Rotate the AMS knob and when “(Service)” is displayed, press the YES button. 3. Rotate the AM

6、S knob and display “ERR DP MODE”. 4. Pressing the YES button sets the error history mode and displays “total rec”. 5. Select the contents to be displayed or executed using the AMS knob. 6. Pressing the AMS knob will display or execute the contents selected. 7. Pressing the AMS knob another time retu

7、rns to step 4. 8. Pressing the MENU/NO button displays “ERROR DP MODE” and exits the error history mode. 9. To exit the test mode, press the MD SYNC button. The unit sets into the STANDBY state, 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 Se

8、lecting the Test Mode Display total rec total play retry err total err err history er refresh tm refresh Details of History No error Disc error. PTOC cannot be read (DISC ejected) Disc error. UTOC error (DISC not ejected) Loading error Address cannot be read (Servo has deviated) Displays the recordi

9、ng time. Displayed as “rh”. The displayed time is the total time 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. Displays the play time. Displayed as “ph”. The time displayed is the total actual play

10、 time. Pauses are not counted. The time is displayed in decimal digits from 0h to 65535h. Displays 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

11、 number of retries and retry errors are displayed in hexadecimal digits from 00 to FF. Displays the total number of errors. Displayed as “total ”. The number of errors is displayed in hexadecimal digits from 00 to FF. Displays the 10 latest errors. Displayed as “0 E”. indicates the history number. T

12、he smaller the number, 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 rotating the AMS knob. Mode which erases the “retry err”, “total err”, and “err history” histories. When returning the

13、 unit to the customer 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 exe

14、cuted. The data has been erased. The mechanism operates normally when recording and play are performed. Mode which erases the “total rec” and “total play” histories. These histories serve as approximate indications of when to replace the optical pickup. If the optical pickup has been replaced, perfo

15、rm 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 operat

16、es normally when recording and play are performed. Table of Error Codes Error Code E00 E01 E02 E03 E04 E05 E06 E07 E08 E09 E0A FOK has deviated Cannot focus (Servo has deviated) Recording retry Recording retry error Playback retry error (Access error) Play retry error (C2 error) Details of ErrorErro

17、r CodeDetails of Error 收音机爱好者资料库 Ra d i o Fa n s .CN 4 CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the mi

18、nus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of soldering iron around 270C during 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 w

19、hen soldering or unsoldering. Laser component in this product is capable of emitting radiation 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 the rear exterior. CAUTION Danger of explosion if battery is inco

20、rrectly 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. Udskiftning m kun ske med batteri af samme fabrikat og type. L

21、evr 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 fabrikantens VARNIG Explosionsfara vid felaktigt batteribyte

22、. 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 suosittelemaan tyyppiin. Hvit kytetty paristo valmistaja

23、n ohjeiden mukaisesti. 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 PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE

24、MENTS PUBLISHED BY SONY. The following caution label is located inside of the unit. 5 TABLE OF CONTENTS 1. SERVICING NOTE.6 2. GENERAL.11 3. DISASSEMBLY 3-1. Front Panel .35 3-2. Slider (Cam).35 3-3. Base Unit (MBU-5B) and BD Board .36 3-4. SW Board and Loading Motor (M103) .36 4. TEST MODE.37 5. EL

25、ECTRICAL ADJUSTMENTS.41 6. DIAGRAMS 6-1. Circuit Boards Location .50 6-2. Block Diagrams BD Section.51 Input/Output Section.53 Control Section .55 Power Section .58 6-3. Printed Wiring Board BD Section .61 6-4. Schematic Diagram BD (1/2) Section .63 6-5. Schematic Diagram BD (2/2) Section .65 6-6. S

26、chematic Diagram Jack (1/2) Section .67 6-7. Schematic Diagram Jack (2/2) Section .69 6-8. Printed Wiring Board Jack Section .71 6-9. Printed Wiring Board Main Section .73 6-10. Schematic Diagram Main (1/5) Section .77 6-11. Schematic Diagram Main (2/5) Section .79 6-12. Schematic Diagram Main (3/5)

27、 Section .81 6-13. Schematic Diagram Main (4/5) Section .83 6-14. Schematic Diagram Main (5/5) Section .85 6-15. Schematic Diagram BD Switch Section .87 6-16. Printed Wiring Board BD Switch Section .87 6-17. Printed Wiring Board Panel Section .89 6-18. Schematic Diagram Panel Section .91 6-19. Print

28、ed Wiring Board Power Section .93 6-20. Schematic Diagram Power Section .95 6-21. Printed Wiring Board Trans Section .97 6-22. Schematic Diagram Trans Section .99 6-23. IC Block Diagrams.101 6-24. IC Pin Functions.105 7. EXPLODED VIEWS 7-1. Case Section.115 7-2. Front Panel Section .116 7-3. Chassis

29、 Section .117 7-4. Mechanism Deck Section (MDM-5B).118 7-5. Base Unit Section (MBU-5B) .119 8. ELECTRICAL PARTS LIST.120 6 SECTION 1 SERVICING NOTE JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the ch

30、ecking 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 deterioration of the optical pick-up laser) TEO : TRK error signal (Traverse adjustment) VC: Reference level for checking

31、the signal RF: RF signal (Check jitter) RF VC TEO For MDM-3 For MDM-5 IOP I-3V VC RF TEO IOP I+3V GND VC RF TEO IOP I+3V GND 1 5 1 6 CN110 RF 5P Connector 6P connector VCTEO IOP I+3V GND Mechanism deck 7 IOP DATA RECORDING AND DISPLAY WHEN PICKUP AND NON-VOLATILE MEMORY (IC171 OF BD BOARD) ARE REPLA

32、CED The IOP value labeled on the 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 label of the optical pick-up. When replacing the pick-up or non-volatile memory (IC171 of BD board), record the IOP value on the pick-up

33、 according to the following procedure. For buttons or knobs not specified as (Deck A) or (Deck B) in the procedure, use that of the corresponding deck. Record Precedure: 1. With the power ON, press the 0 (Deck B) button while pressing the OUTPUT and CLEAR (Deck A) buttons together. 2. Rotate the AMS

34、 knob to display “(Service)”, and press the YES button. 3. Rotate the AMS knob to display “lop.Write” (S: 28), 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 on the optical pick-up. To

35、 select the number :Rotate 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 button. 8. The value will be rec

36、orded in the non-volatile memory and the display will become “Iop Write”. 9. Press the MD SYNC button to complete. Display Precedure: 1. With the power ON, press the 0 (Deck B) button while pressing the OUTPUT and CLEAR (Deck A) buttons together. 2. Rotate the AMS knob to display “(Service)”, and pr

37、ess the YES button. 3. Rotate the AMS knob to display “lop.Read” (S: 27). 4. “./#.#” is displayed and the recorded contents are displayed. . : indicates the Iop value labeled on the pick-up. #.#: indicates the Iop value after adjustment 5. To end, press the AMS button or MENU/NO button to display “I

38、op Read”. Then press the MD SYNC button. 8 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, an

39、d c C1 error : Below 220 AD error : Below 2 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 : Below 80 AD error : Below 2 Unsatisfactory

40、 if displayed as T= (#) (NG” NG (, # are both arbitrary numbers) CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

41、Laser power check (5-6-2 : See page 44) Traverse check (5-6-3 : See page 44) Focus bias check (5-6-4 : See page 45) C PLAY check (5-6-5 : See page 45) Self-recording/playback check (REC/PLAY) (5-6-6 : See page 45) TEMP check (Temperature compensation offset check) (5-6-1 : See page 44) Criteria for

42、Determination (Unsatisfactory if specified value is not satisfied) Clean the optical pick-up Adjust again Replace the optical pick-up Replace the optical pick-up Replace the optical pick-up Replace the optical pick-up Replace the optical pick-up If always unsatisfactory: Replace the overwrite head C

43、heck for disconnection of the circuits around the overwrite head If occasionally unsatisfactory: Check if the overwrite head is distorted Check the mechanism around the sled Check for disconnection of the circuits around D101 (BD board) Check the signals around IC101, IC121, CN102, CN103 (BD board)

44、Measure if unsatisfactory: Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments. FORCED RESET The system microprocessor can be reset in the following procedure. Use these proc