sony_MDS-PC2_b_service_manual 维修电路图.pdf

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1、1 MICROFILM MDS-PC2 SPECIFICATIONS SERVICE MANUAL MINIDISC DECK Model Name Using Similar MechanismMDS-S40 MD Mechanism TypeMDM-5A Optical Pick-up TypeKMS-260B/J1N US Model Canadian Model AEP Model UK Model E Model Continued on next page 收音机爱好者资料库 Ra d i o Fa n s .CN 2 SELF-DIAGNOSIS FUNCTION The sel

2、f-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 on how to view error codes for the customer, refer to the following box in the instruction manua

3、l. 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 Function (Error History Display Mode). Note: Perform the self-diagnosis function in the “error h

4、istory display mode” in the test mode. The following describes the least required proce- dure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the p “PROGRAM” button to exit the mode. 1. While pressing the INPUT button and p button, connect the power plug t

5、o the outlet, and release the INPUT button and p button. 2. Press the + button and when “Service” is displayed, press the “PROGRAM” button. 3. Press the + button and display “ERR DP MODE”. 4. Pressing the “PROGRAM” button sets the error history mode and displays “total rec”. 5. Select the contents t

6、o be displayed or executed using the + button. 6. Pressing the r “PROGRAM” button will display or execute the contents selected. 7. Pressing the r “PROGRAM” button another time returns to step 4. 8. Pressing the p “PROGRAM” button displays “ERROR DP MODE” and exits the error history mode. 9. To exit

7、 the test mode, press the 6 “1” button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends. *Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode. Press the INPUT button to switch the functions. Each time the INPUT b

8、utton is pressed, the display switches in the following order; “PROGRAM” n “1” n blank n “PROGRAM” The functions of each button change with the display. For simplicity, operations of the INPUT button will not be described here. Instead, symbols are added to the names of buttons. Press the INPUT butt

9、on as required to switch the display. Example) p “PROGRAM” : Display “PROGRAM” and press the p button. p “1” : Display “1” and press the p button. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 Displays the recording time. Displayed as “rh”. The displayed time is the total time the laser is set to the high power s

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

11、e 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 displayed in hexadecimal digits from 00 to FF. Displays the t

12、otal 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. The smaller the number, the more recent is the error. (00 is the latest). indicates the error code. Re

13、fer to the following table for the details. The error history can be switched by pressing the + button. Mode which erases the “retry err”, “total err”, and “err history” histories. When returning the unit to the customer after completing repairs, perform this to erase the past error history, After p

14、ressing the r “PROGRAM” button and “er refresh?” is displayed, press the “PROGRAM” 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 normally when recording and pla

15、y 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, perform this operation and erase the history. After pressing the “PROGRAM” button and “tm re

16、fresh?” is displayed, press the r “PROGRAM” 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 normally when recording and play are performed. ITEMS OF ERROR HISTORY

17、 MODE ITEMS AND CONTENTS Selecting the Test Mode Display total rec total play retry err total err err history er refresh tm refresh Details of History No error Read error. PTOC cannot be read (DISC ejected) TOC error. UTOC error (DISC not ejected) Loading error Address cannot be read (Servo has devi

18、ated) 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 ErrorError CodeDetails of Error 收音机爱好者资料库 Ra d i o Fa

19、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 minus side of a tantalum capacitor may be damag

20、ed 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 when soldering or unsoldering. Laser component

21、 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. This caution label is located inside the unit. CAUTION Danger of explosion if battery is in

22、correctly 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.

23、 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 fabrikantens VARNIG Explosionsfara vid felaktigt batteriby

24、te. 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 valmista

25、jan 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 SUPP

26、LEMENTS PUBLISHED BY SONY. PARTS No.MODEL MODEL IDENTIFICATION MODEL NUMBER LABEL 4-220-576-0US model 4-220-577-0Canadian model 4-220-578-0AEP, UK model 4-220-579-0Singapore model ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES

27、 ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. Parts No. 5 TABLE OF CONTENTS 1. SERVICING NOTE. 6 2. GENERAL. 12 3. DISASSEMBLY 3-1. Case and

28、Front Panel .14 3-2. MD Mechanism .14 3-3. Slider (CAM) .15 3-4. Base Unit (MBU-5A) BD Board .15 3-5. SW Board and Loading Motor (M103) .16 4. TEST MODE. 17 5. ELECTRICAL ADJUSTMENTS.22 6. DIAGRAMS 6-1. Circuit Boards Location .31 6-2. Block Diagrams BD Section.33 Main Section . 34 6-3. Printed Wiri

29、ng Board BD Section . 36 6-4. Schematic Diagram BD (1/2) Section .37 6-5. Schematic Diagram BD (2/2) Section .38 6-6. Schematic Diagram Main (1/2) Section .39 6-7. Schematic Diagram Main (2/2) Section .40 6-8. Printed Wiring Board Main Section .41 6-9. Schematic Diagram Panel Section .42 6-10. Print

30、ed Wiring Board Panel Section .43 6-11. Schematic Diagram Power Section . 44 6-12. Printed Wiring Board Power Section .45 6-13. Schematic Diagram BD Switch Section . 46 6-14. Printed Wiring Board BD Switch Section .46 6-15. IC Block Diagrams.46 6-15. IC Pin Functions.49 7. EXPLODED VIEWS 7-1. Cabine

31、t Section .53 7-2. Mechanism Section (MDM-5A) . 54 7-3. Base Unit Section (MBU-5A). 55 8. ELECTRICAL PARTS LIST.56 SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim,

32、“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 exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microa

33、mpers). Leak- age 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-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable

34、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 Sanwa SH-63Trd are examples of a pas- sive VOM that is suitable. Nearly al

35、l battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. AC voltmeter (0.75V) 1.5k 0.15F Earth Ground To Exposed Metal Parts on Set 6 SECTION 1 SERVICING NOTE JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-250

36、1-149-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 deterioration of the optica

37、l pick-up laser) TEO : TRK error signal (Traverse adjustment) VC: Reference level for checking the signal RF: RF signal (Check jitter) RF VC TEOFor 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 VC TEO IOP I+3V GND Mechanism deck 7 I

38、OP 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 label of the optical pic

39、k-up. 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 Precedure: 1. While pressing the INPUT button and p button, connect the power plug to the outlet, and release the INPUT button

40、 and p button. 2. Press the + button to display “Service”, and press the “PROGRAM” button. 3. Press the + button to display “lop.Write”, and press the “PROGRAM” button. 4. The display becomes “Ref=.” ( is an arbitrary number) and the numbers which can be changed will blink. 5. Input the IOP value wr

41、itten on the optical pick-up. To select the number : Press the + button. To select the digit: Press the r “PROGRAM” button. 6. When the “PROGRAM” 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 a

42、nd press the “PROGRAM” button. 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 6 “1” button to complete. “Standby” will be displayed. Display Precedure: 1. While pressing the INPUT button and p

43、button, connect the power plug to the outlet, and release the INPUT button and p button. 2. Press the + button to display “Service”, and press the “PROGRAM” button. 3. Press the + button to display “lop.Read”, and press the “PROGRAM” button. 4. “./#.#” is displayed and the recorded contents are disp

44、layed. . : indicates the Iop value labeled on the pick-up. #.#: indicates the Iop value after adjustment 5. To end, press the r “PROGRAM” button or p “PROGRAM” button to display “Iop Read”. Then press the 6 “1” buttun. *Note: As this unit has only a few buttons, one button is assigned with several f

45、unctions in the test mode. Press the INPUT button to switch the functions. Each time the INPUT button is pressed, the display switches in the following order; “PROGRAM” n “1” n blank n “PROGRAM” The functions of each button change with the display. For simplicity, operations of the INPUT button will not be described here. Instead, symbols are added to the names of buttons. Press the INPUT button as required to switch the display. Example) p “PR