sony_MDS-JA30ES_service_manual 维修电路图.pdf

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1、US Model Canadian Model AEP Model UK Model SERVICE MANUAL MINIDISC DECK MICROFILM Model Name Using Similar MechanismMDS-JA50ES MD Mechanism TypeMDM-4B Base Unit TypeMBU-2B Optical Pick-up TypeKMS-210A/J-N MDS-JA30ES SPECIFICATIONS Continued on next page U.S. and foreign patents licensed from Dolby L

2、aboratories Licensing Corporation. Photo: GOLD 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 DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE P

3、ART 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 SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS Q

4、UE 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 before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and

5、 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 microampers). Leakage current can be

6、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 for this job. 3.Measuring the volta

7、ge 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 passive VOM that is suitable. Nearly all battery operated digital multimeters

8、 that have a 2V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT 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! Lithi

9、umbatteri - Eksplosionsfare ved fejlagtig hndtering. Udskiftning 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 apparatfabrikan

10、ten. Brukte batterier katterier kasseres i henhold til fabrikantens 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 virheellis

11、esti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti. Earth Ground AC voltmeter (0.75V) 1.5k0.15F Fig. A. Using an AC voltmeter to check AC leakage. To Exposed Metal Parts on Set 收音机爱好者资料库 Ra d i o Fa n s .CN 3 This

12、appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside the unit. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous

13、 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 during repairing. Do not touch the solder

14、ing 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. The laser component in this product is capable of emitting radiation exceeding the limit for Class 1. MODEL IDENTIFICATION BACK PANEL Parts No. 4-992-95

15、9-1 : AEP, UK, German model 4-992-959-2 : US model 4-992-959-3 : Canadian model TABLE OF CONTENTS 1.SERVICING NOTE 4 2.GENERAL 7 3.DISASSEMBLY 3-1.Tray Assembly 8 3-2.Bracket (Motor) ASSY 9 3-3.Holder ASSY 9 3-4.Base Unit 10 3-5.HMOT Board and HLIM Board10 4.TEST MODE 11 5.ELECTRICAL ADJUSTMENTS14 6

16、.DIAGRAMS 6-1.BD Section 19 6-2.Digital Section21 6-3.Audio Section 23 6-4.Power Section25 6-5.Circuit Boards Location 26 6-6.Printed Wiring Board BD Section 28 6-7.Schematic Diagram BD Section 31 6-8.Schematic Diagram Digital Section 35 6-9.Printed Wiring Board Digital Section 39 6-10. Printed Wiri

17、ng Board Audio Section 42 6-11. Schematic Diagram Audio Section 45 6-12. Schematic Diagram Power Section 48 6-13. Schematic Diagram Panel Section 51 6-14. Printed Wiring Board Panel Section 53 6-15. IC Block Diagrams56 6-16. IC Pin Functions61 7.EXPLODED VIEWS 7-1.Main Section 73 7-2.Chassis Section

18、 74 7-3.Front Panel Section 1 75 7-4.Front Panel Section 2 76 7-5.Mechanism Section 1 (MDM-4B)77 7-6.Mechanism Section 2 (MDM-4B)78 7-7.Mechanism Section 3 (MDM-4B)79 7-8.Base Unit Section (MBU-2B) 80 8.ELECTRICAL PARTS LIST81 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 1 SERVICING NOTE HOW TO OPEN THE

19、DISC TRAY WHEN POWER SWITCH TURNS OFF 1 Remove the sixteen screws (BVTT 38) from the bottom plate. 2 Remove the bottom plate. 3 Rotate the pulley gear in the arrow direction A, and open the tray assembly in the arrow direction B. Forced Reset The system microprocessor can be reset in the following w

20、ay. Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. Method 2: Disconnect the power plug, and short-circuit CN905 of the PW board with a pair of tweezers, etc. PW board (Component Side) CN905 (RESET) CN901 Method 1: Set TP (S.RST) of the

21、DIG board to ground momentarily. DIG board (Side A) TP (S.RST) CN203 C206 IC202 Pully gear Tray assembly B A 5 Retry Cause Display Mode In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent display tube. This is useful for locating the faulty part o

22、f the unit. The retry cause, number of retries, and number of retry errors are displayed. Each is displayed in hexadecimal number. Method: 1.Load a recordable disc whose contents can be erased into the unit. 2.Press the p button, OPEN/CLOSE button, DISPLAY/CHAR button simultaneously. 3.Press the r b

23、utton, and start recording. 4.The # value increases with each retry. If an error occurs after a retry, the count will also increase. 5.To exit the test mode, press the TIME button. Fig. 1 Reading the Test Mode Display R.T s c # # e Fluorescent Display Tube Signs : Cause of retry # # : Number of retr

24、ies : Number of retry errors All three displays above are in hexadecimal numbers. 6 Reading the Retry Cause Display Hexadecimal Bit Binary Higher BitsLower Bits 84218421 b7 b6 b5 b4 b3 b2 b1 b0 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000 When more than 3.5 shocks are dete

25、cted When ADER was counted more than five times continuously When ADIP address is not continuous (Not used) When not in focus When ABCD signal level exceeds the specified range When spindle rotation is detected as slow When access operation is not performed normally Hexa- decimal shock *1 ader5 Disc

26、ontinuous address (Not used) FCS incorrect IVR rec error Spindle is slow Access fault Cause of RetryOccurring conditions 01 02 04 08 10 20 40 80 *1 Some displays are not used depending on the microprocessor version. Reading the Display: Convert the hexadecimal display into binary display. If more th

27、an two causes, they will be added. Example When 42 is displayed: Higher bit : 4 = 0100 n b6 Lower bit : 2 = 0010 n b1 In this case, the retry cause is combined of “spindle is slow” and “ader5”. When A2 is displayed: Higher bit : A = 1010 n b7+b5 Lower bit : 2 = 0010 n b1 The retry cause in this case

28、 is combined of “access fault”, “IVR rec error”, and “ader5”. Hexadecimal n Binary Conversion Table HexadecimalBinaryHexadecimalBinary 0 1 2 3 4 5 6 7 8 9 A B C D E F 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 Reference: In this test mode, when the button is pres

29、sed, and the disc is played back, the “PLAYBACK MODE” is set. The display becomes as shown in Fig. 2. The playback mode is not used in particular during servicing. 44 p Fig. 2 Display during Playback Mode 44 : Parts No. (Name of area named on TOC) : Address (Physical address on disc) p : Track mode

30、(Copyright information of each part, information on copyright, etc.) 7 SECTION 2 GENERAL 1POWER switch 2Remote sensor 3TIMER switch 4FILTER button 5SCROLL/CLOCK SET button 6DISPLAY/CHAR button 7Disc tray 80/) (fast backward/fast forward) buttons 9EDIT/NO/YES buttons ! AMS knob ! DIGITAL REC LEVEL kn

31、ob ! ANALOG REC LEVEL L/R knob ! r REC (recording) button ! p (stop) button ! P (pause) button ! ( (play) button ! OPEN/CLOSE button ! Display window ! TIME button REPEAT button PLAY MODE button INPUT switch PHONE LEVEL knob PHONES jack This section is extracted from instruction manual. 8 SECTION 3

32、DISASSEMBLY Note : Follow Xthe disassembly procedure in the numerical order given. 3-1. TRAY ASSEMBLY 1Rotate the pulley gear in the arrow direction A, and pull out the tray assembly. 2Two screws (PTP 2.6x6) 3Two screws (PTP 2.6x6) 6Gear 4 (Two gear) 7Screw (BVTT 3x6) 9Shaft 0Remove the tray assembl

33、y in the arrow direction B. A B Bracket (TOP) Note: When attaching the bracket (TOP), attach while pressing the switch as shown in the figure. Precautions on Attaching (Assemble in the reverse order of removal.) Slider assembly When attaching the tray assembly, first move the slider assembly in the

34、arrow direction B and set Pin A at the position shown. When attaching gear 4 (two in front), pull the tray assembly in arrow direction A completely, and position racks (L), (R) and (D) as shown in the figure. Rack (L) Gear 4 Rack (D) Hole A B 5Gear 4 (Two gear) 8Stopper (Shaft A) Pin A 4Bracket (TOP

35、) 9 3-2. BRACKET (MOTOR) ASSY 1Two screws (BVTT 3x6) 2Two screws (BVTT 3x6) 4Bracket (Motor) assembly 3Connector (CN198 : HMOT board) 3-3. HOLDER ASSY Shaft A Slider assembly 1When removing, move the slider assembly in the arrow direction, and check that shaft A is at the position shown in the figur

36、e. 3Remove the four screws (BVTT 3x6), and remove the four collars (dampers) and four compression springs. 2Connector (CN198 : HMOT board) 10 3-4. BASE UNIT 1Leaf spring (UDL) 2Leaf spring (UDR) 3Holder assembly 5Base unit (MBU-2B) 4Three screws (BVTP 3x6) 3-5. HMOT BOARD AND HLIM BOARD 5Stopper was

37、her 6Gear (HEAD C) 8Gear (HEAD B) 9Two screws (Precision P2x3) 1Stopper washer 3Lever (OWH) 4Torsion spring (OWH) 2Shaft (OWH) !HLIM board !Two screws (PTP 2.6x6) 7Stopper washer !HMOT board 11 4-4. Selecting the Test Mode Eight test modes are selected by turning the AMS knob. SECTION 4 TEST MODE 4-

38、1. Setting the Test Mode While pressing the AMS knob, insert the power plug into the power supply inlet, and release the AMS knob. 4-2. Exiting the Test Mode Press the REPEAT button. Unplug the power plug from an outlet. 4-3. Basic Operations of the Test Mode All operations are performed using the A

39、MS knob, YES button, and NO button. The functions of these buttons are as follows. For detailed description of each adjustment mode, refer to 5. Electrical Adjustments. If a different adjustment mode has been selected by mistake, press the NO button to exit from it. * The EEP MODE is not used in ser

40、vicing. If set accidentally, press the NO button immediately to exit it. 4-4-1. Operating the Continuous Playback Mode 1.Entering the continuous playback mode 1 Set the disc in the unit (either MO or CD).(MO: Recordable disc, CD: Disc for playback only). 2 Rotate the AMS knob and display “CPLAY MODE

41、”. 3 Press the YES button to change the display to “CPLAY IN”. 4 When access completes, the display changes to “C = AD = ”. Note : The “ ” displayed are arbitrary numbers. 2.Changing the parts to be played back 1 Press the YES button during continuous playback to change the display to “CPLAY MID”, “

42、CPLAY OUT”. When pressed another time, the parts to be played back can be changed. 2 When access completes, the display changes to “C = AD = ”. Note : The “ ” displayed are arbitrary numbers. 3.Ending the continuous playback mode 1 Press the NO button. The display will change to “CPLAY MODE”. 2 Pres

43、s the OPEN/CLOSE button and remove the disc. Note 1 : The playback start addresses for IN, MID, and OUT are as follows. IN40h cluster MID300h cluster OUT 700h cluster Function AMS knob YES button NO button Contents Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to

44、 previous step. Stops operations. Contents Temperature compensation offset adjustment Laser power adjustment Traverse adjustment Focus bias adjustment Focus bias check Continuous playback mode Continuous recording mode Non-volatile memory mode * Display TEMP ADJUS LDPWR ADJUS EFBAL ADJUS FBIAS ADJUS

45、 FBIAS CHECK CPLAY MODE CREC MODE EEP MODE Test Mode initial display 12 4-4-2. Operating the Continuous Recording Mode 1.Entering the continuous recording mode 1 Set the MO disc in the unit. 2 Rotate the AMS knob and display “CREC MODE”. 3 Press the YES button to change the display to “CREC IN”. 4 W

46、hen access completes, the display changes to “CREC (” an REC lights up. Note : The “ ” displayed are arbitrary numbers. 2.Changing the parts to be recorded 1 When the YES button is pressed during continuous recording, the display changes to “CREC MID”, “CREC OUT” and REC goes off. When pressed anoth

47、er time, the parts to be recorded can be changed. 2 When access completes, the display changes to “CREC (” and REC lights up. Note : The “ ” displayed are arbitrary numbers. 3.Ending the continuous recording mode 1 Press the NO button. The display changes to “CREC MODE” and REC goes off. 2 Press the

48、 OPEN/CLOSE button and remove the disc. Note 1 : The recording start addresses for IN, MID, and OUT are as follows. IN40h cluster MID300h cluster OUT 700h cluster Note 2 : The NO button can be used to stop recording anytime. Note 3 : During the test mode, the erasing-protection tab will not be detec

49、ted. Therefore be careful not to set the continuous recording mode when a disc not to be erased is set in the unit. Note 4 : Do not perform continuous recording for long periods of time above 5 minutes. Note 5 : During continuous recording, be careful not to apply vibration. 4-4-3. Non-Volatile Memory Mode This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If set accidentally, press the NO button immediately to exit it. 4-5. Functions of Other buttons Function p