sony_MDS-JE700_service_manual 维修电路图.pdf

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1、 1 Model Name Using Similar MechanismMDS-JE500 MD Mechanism TypeMDM-3A Optical Pick-up TypeKMS-260A/J1N MDS-JE700 SERVICE MANUALUS Model Canadian Model AEP Model UK Model MINIDISC DECK MICROFILM SPECIFICATIONS Continued on next page 收音机爱好者资料库 Ra d i o Fa n s .CN 2 CAUTION Danger of explosion if batt

2、ery 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. Udskiftning m kun ske med batteri af samme fabrikat

3、 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 fabrikantens VARNIG Explosionsfara vid felaktigt

4、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 suosittelemaan tyyppiin. Hvit kytetty paristo

5、 valmistajan ohjeiden mukaisesti. MODEL IDENTIFICATION BACK PANEL Parts No. 4-985-444-1 4-985-444-2 4-985-444-3 4-985-444-4 Parts No.MODEL AEP model UK model US model Canadian model 收音机爱好者资料库 Ra d i o Fa n s .CN 3 Notes on chip component replacement Never reuse a disconnected chip component. Notice

6、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 soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the

7、conductor when soldering or unsoldering. This 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

8、those specified herein may result in hazardous ra- diation exposure. The laser component in this product is capable of emitting radiation exceeding the limit for Class 1. To Exposed Metal Parts on Set 0.15F1.5k AC voltmeter (0.75V) Earth Ground SAFETY CHECK-OUT After correcting the original service

9、problem, perform the follow- ing safety checks 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. LEAKAGE The AC leakage from any exposed metal part to eart

10、h 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). 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 in

11、structions 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. The “limit” indication is 0.75 V, so analog meters must

12、have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a pas- sive VOM that is suitable. Nearly all 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. SAFETY-RELATED COMPONENT WARN

13、ING ! 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 SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYAN

14、T 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 COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. 收音

15、机爱好者资料库 Ra d i o Fa n s .CN 4 TABLE OF CONTENTS 1. SERVICING NOTE. 5 2. GENERAL.8 3. DISASSEMBLY 3-1. Case and Front Panel Assembly. 24 3-2. Bracket (T), (L) and (R). 24 3-3. BD Board . 25 3-4. SUB Chassis. 25 3-5. Shutter Assembly . 26 3-6. Over Write Head . 26 3-7. Slider Complete Assembly. 27 4.

16、TEST MODE. 28 5. ELECTRICAL ADJUSTMENTS. 31 6. DIAGRAMS 6-1. Circuit Boards Location. 36 6-2. Brock Diagrams BD Section. 37 Main Section . 39 6-3. Waveforms . 41 6-4. Printed Wiring Board BD Section . 43 6-5. Schematic Diagram BD Section . 45 6-6. Schematic Diagram Main Section . 49 6-7. Printed Wir

17、ing Board Main Section . 53 6-8. Printed Wiring Board Panel Section . 55 6-9. Schematic Diagram Panel Section . 57 6-10. Printed Wiring Board HP Section . 59 6-11. Schematic Diagram HP Section . 60 6-12. IC Block Diagrams . 61 6-13. IC Pin Functions . 67 7. EXPLODED VIEWS 7-1. Case and Main Board Se

18、ction. 76 7-2. Front Panel Section . 77 7-3. Mechanism Deck Section (1) (MDM-3A). 78 7-4. Mechanism Deck Section (2) (MDM-3A). 79 8. ELECTRICAL PARTS LIST. 80 5 SECTION 1 SERVICING NOTE JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-124-A) is useful for checking the waveform of the BD bo

19、ard. The names of terminals and the checking items to be performed are shown as follows. 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: Refe

20、rence level for checking the signal RF: RF signal (Check jitter) FORCED RESET The system microprocessor can be reset in the following way. Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. IOP I + 3V TEO VC RF Mechanism deck CN110 Jig (J-2

21、501-124-A) Method : Disconnect the power plug, short-circuit the land of RESET. MAIN BOARD (Conductor Side) Short land TP (RESET) CN303 IC401 6 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 usef

22、ul for locating the faulty part of the unit. The data amount stored in D RAM, number of retries, and retry cause are displayed. Each is displayed in hexadecimal number. The display of the D RAM data amount enables data reading, accumulation, ejection, and writing to be performed smoothly. If writing

23、 is not smooth, data may decrease considerably. Method: 1. Load a recordable disc whose contents can be erased into the unit. 2. Press the EDIT/NO button several times to display “All Erase?” on the fluorescent display tube. 3. Press the YES button. 4. When “All Erase?” is displayed on the fluoresce

24、nt display tube, the numbers on the music calendar will start blinking. 5. Press the YES button to display “Complete”, and press the p button immediately and continue pressing for about 10 seconds. 6. When the “TOC” displayed on the fluorescent display tube goes off, release the p button. 7. Press t

25、he r REC button to start recording. 8. Press the DISPLAY button to display the test mode (Fig. 1), and check the display. 9. The Rt value increases with each retry. If an error occurs after a retry, “Retry Error” will be displayed, and the number of retries counted will be set back to 0. 10. To exit

26、 the test mode, press the POWER button. Turn OFF the power, and after “TOC” disappears, disconnect the power plug from the outlet. Fig. 1 Reading the Test Mode Display SC Rt # # Fluorescent Display Tube Signs : Displays the DRAM memory amount when at all times. # #: Displays the number of retries. W

27、hen a retry error occurs, the number will be set back to 0. * *: Cause of retry All three displays above are in hexadecimal numbers. 7 Reading the Retry Cause Display Hexadecimal Bit Binary Higher BitsLower Bits 84218421 b7 b6 b5 b4 b3 b2 b1 b0 00000000 00000001 00000010 00000100 00001000 00010000 0

28、0100000 01000000 10000000 When spindle rotation is detected as slow When more than 3.5 shocks are detected 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 CLV is unlocked

29、When access operation is not performed normally Hexa- decimal Spindle is slow shock *1 ader5 Discontinuous address (Not used) FCS incorrect IVR rec error CLV unlock Access fault Cause of RetryOccurring conditions 00 01 02 04 08 10 20 40 80 *1 Some displays are not used depending on the microprocesso

30、r version. Reading the Display: Convert the hexadecimal display into binary display. If more than 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 “CLV unlock” and “ader5”. When A2 is displ

31、ayed: Higher bit : A = 1010 n b7+b5 Lower bit : 2 = 0010 n b1 The retry cause in this case 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 100

32、0 1001 1010 1011 1100 1101 1110 1111 8 SECTION 2 GENERAL Location of Parts and Controls 1234567890! ! 1 POWER switch 2 SCROLL/CLOCK SET button 3 CHAR button 4 CLEAR button 5 DISPLAY button 6 Disc compartment 7 EJECT button 8 EDIT/NO button 9 YES button ! AMS knob ! REC LEVEL knob ! INPUT switch ! RE

33、C MODE swicth ! r (recording) button ! p (stop) button ! P (pause) button ! ( (play) button ! 0/) (fast backward/forward) buttons ! Display window REPEAT button PROGRAM button SHUFFLE button CONTINUE button PHONE LEVEL knob PHONES jack TIMER switch 9 This section is extracted from instruction manual

34、. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. CASE AND FRONT PANEL ASSEMBLY 1Two screws (Case 3 TP2) 2Screw (Case 3 TP2) 6Screw (BVTP3x8) 7Case 3-2. BRACKET (T), (L) AND (R) 1Four screws (BVTT2x3) 2Brac

35、ket (T) 3Screw (BVTT2x3) 4Screw (BVTT2x3) 5Bracket (joint) 6Two screws (BVTT2x3) 7Bracket (L) 9Bracket (R) 8Two screws (BVTT2x3) 3Screw (Case 3 TP2) 4Two screws (Case 3 TP2) 5Screw (BVTP3x8) 8Flat type wire (23 core) (CN303) 9Connector (6P) (CN770) 0Eight screws (BVTP3x8) !Front panel block assembly

36、 Main board claw HP board claw 25 3-3. BD BOARD 3-4. SUB CHASSIS 1Flexible board (Over write head) 2Flat type wire (15 core) 3Screw (BVTT2x4) 4OP relay flexible board 5BD board 1Two step screws 2Two step screws 3Two insulators 4Two insulators 5Sub chassis Part A Part A Part A NG OK Take care so that

37、 the part A may be right position when installing. 26 3-5. SHUTTER ASSEMBLY 3-6. OVER WRITE HEAD 1Stopper washer 2Shaft (shutter) 3Shutter assembly Shaft (lid) Shaft (shutter) Hole B Hole A When installing, install the shaft (shutter) into the hole as shown in the figure before installing the shaft

38、(lid) into the hole B. 1Precision screw (P1.7x6) 2Over write head Shutter assembly 27 3-7. SLIDER COMPLETE ASSEMBLY 1Screw (M1.7x2) 2Retainer (gear) 3Set the shaft of Gear (LB) to be at the position in the figure. 4Remove the slider complete assembly in the direction of arrow with putting out of two

39、 claws. claw claw 45 Slider assembly OK NG Take care not to damage the detective switch. Part A Install the part A of lever (head up) to pass over the slider complete assembly. Note for Installation of Slider Complete Assembly 28 SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE 1 As loading

40、 related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the EJECT button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will

41、 not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the EJECT button after pressing the NO button and the rotation of disc is stopped. 2 The erasing-protection tab is not detected in the test mode. Therefore, operating in the recording laser emission mode and pressing

42、the rREC button, the recorded contents will be erased regardless of the position of the tab. When using a disc that is not to be erased in the test mode, be careful not to enter the continuous recording mode and traverse adjustment mode. 4-1-1. Recording laser emission mode and operating buttons 1.

43、Continuous recording mode (CREC MODE) 2. Traverse adjustment mode (EFBAL ADJUST) 3. Laser power adjustment mode (LDPWR ADJUST) 4. Laser power check mode (LDPWR CHECK) 5. When pressing the rREC button. 4-2. SETTING THE TEST MODE While pressing the AMS knob, insert the power plug into the power supply

44、 inlet, and release the AMS knob. 4-3. EXITING THE TEST MODE When the REPEAT button is pressed, it becomes in the STANDBY mode. Or unplug the power plug from an outlet. 4-4. BASIC OPERATIONS OF THE TEST MODE All operations are performed using the AMS knob, YES button, and NO button. The functions of these buttons are as follows. Function name AMS knob YES button NO button Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations. 4-5. SELECTING THE TEST MODE