sony_MDS-JE320_service_manual 维修电路图.pdf

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1、MDS-JE320 US Model Canadian Model AEP Model SERVICE MANUAL MICROFILM Model Name Using Similar MechanismMDS-JE510 MD Mechanism TypeMDM-3GC Optical Pick-up TypeKMS-260A/J1NP MINIDISC DECK SPECIFICATIONS 收音机爱好者资料库 Ra d i o Fa n s .CN 2 CAUTION Danger of explosion if battery is incorrectly replaced. Rep

2、lace 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. Levr det brugte batter

3、i 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. Anvnd samma batteri

4、typ 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 valmistajan ohjeiden mukaisesti

5、. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous 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

6、. 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 in this p

7、roduct 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 PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMP

8、OSANTS 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. SAFETY-RELATED COMPONENT WARNIN

9、G ! 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. 收音机爱好者资料库 Ra d i o Fa n s .CN

10、 3 SAFETY CHECK-OUT 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 all other exposed metal parts for AC leakage. Check leakage as described below. LE

11、AKAGE 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 measured by any one of three methods. 1.A commercial leakage tester, such as the Si

12、mpson 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. The “

13、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 that have a 2V AC range are suitable. (See Fig. A) Parts No. 4-990-651-1 4-990-651

14、-4 4-990-651-5 Model US model Canadian model AEP model TABLE OF CONTENTS 1. SERVICING NOTE. 5 2. GENERAL. 8 3. DISASSEMBLY 3-1. Case and Front Panel Assembly. 9 3-2. Bracket (T), (L) and (R). 9 3-3. BD Board . 10 3-4. SUB Chassis . 10 3-5. Shutter Assembly . 11 3-6. Over Write Head .11 3-7. Slider C

15、omplete Assembly.12 4. TEST MODE. 13 5. ELECTRICAL ADJUSTMENTS.16 6. DIAGRAMS 6-1. Brock Diagrams BD Section.21 Main Section .23 6-2. Circuit Boards Location.25 6-3. Printed Wiring Board BD Section . 27 6-4. Schematic Diagram BD Section (1/2) .29 6-5. Schematic Diagram BD Section (2/2) .31 6-6. Prin

16、ted Wiring Board Main Section .33 6-7. Schematic Diagram Main Section (1/3) . 35 6-8. Schematic Diagram Main Section (2/3) . 37 6-9. Schematic Diagram Main Section (3/3) . 39 6-10. Printed Wiring Board Display Section . 41 6-11. Schematic Diagram Display Section .43 6-12. Printed Wiring Board Switch

17、 Section .45 6-13. Schematic Diagram Switch Section . 47 6-14. IC Brock Diagrams BD Section. 49 6-15. IC Pin Functions . 54 7. EXPLODED VIEWS 7-1. Main Section . 63 7-2. Front Panel Section .64 7-3. Mechanism Deck Section (1) (MDM-3GC) . 65 7-4. Mechanism Deck Section (2) (MDM-3GC) . 66 8. ELECTRICA

18、L PARTS LIST.67 MODEL IDENTIFICATION BACK PANEL Parts No. To Exposed Metal Parts on Set 0.15 F 1.5 k AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SELF-DIAGNOSIS FUNCTION The self-diagnosis function consists of error codes for u

19、sers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing.For detail on how to view error codes for users, refer to the following box in the instruction manual. Self-Diagnosis Function The deck has a self-diagnosis displa

20、y. This function shows a three-digit display (a combination of a letter and figures) and the corresponding message alternately, so you can check the decks condition. If such a display appears, check the following table in order to resolve the problem. Should any problem persist, consult your nearest

21、 Sony dealer. Three-digit display/MessageCause/Remedy C11/ProtectedThe inserted MD is record-protected. /Take out the MD, and close the record-protect tab (page 9.) C13/REC ErrorThe recording was not made properly. /Set the deck in a stable place, and repeat the recording procedure. The inserted MD

22、is dirty (with smudges, fingerprints, etc.) scratched, or not up to standards. /Replace the disc, and repeat the recording procedure. C13/Disc ErrorThe deck could not read the TOC of the MD properly. /Take out the MD, and insert it again. C14/Disc ErrorThe deck could not read the TOC of the MD prope

23、rly. /Insert another disc. /If possible, erase all tracks on the MD using the All Erase Function on page 28. C71/Din UnlockA moments lighting is due to the signals of the digital program being recorded. This does not affect the recorded material. While recording from a digital component connected th

24、rough the digital input connector, the digital connecting cable was unplugged or the digital component turned off. /Connect the cable or turn the digital component back on. C11 Protected Self-diagnosis display 5 SECTION 1 SERVICING NOTE JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-124-

25、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. 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) TE

26、O : TRK error signal (Traverse adjustment) VC: Reference 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.

27、 Method : Disconnect the power plug, short-circuit jumper wire of JW70 and JW181. MAIN BOARD (Component Side) Mechanism deck CN110 RF VC TEO IOP I + 3V Jig (J-2501-124-A) Jumper wire JW181JW70 BT301 IC301 6 RETRY CAUSE DISPLAY MODE In this test mode, the causes for retry of the unit during recording

28、 can be displayed on the fluorescent display tube. This is useful for locating the faulty part of the unit. The data amount stored in DRAM, number of retries, and retry cause are displayed. Each is displayed in hexadecimal number. The display of the DRAM data amount enables data reading, accumulatio

29、n, ejection, and writing to be performed smoothly. If writing 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

30、button. 4.When “All Erase?” is displayed on the fluorescent 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

31、display tube goes off, release the p button. 7.Press the r REC and PLAY buttons to start recording. 8.Press the DISPLAY/CHAR 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, a

32、nd the number of retries counted will be set back to 0. 10. To exit the test mode, press the 1/u button. Turn OFF the power, and after “TOC” disappears, disconnect the power plug from the outlet. Fig. 1 Reading the Test Mode Display Fluorescent Display Tube Signs SC Rt # # : Displays the DRAM memory

33、 amount when at all times. # #: Displays the number of retries. When 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

34、 b2 b1 b0 00000000 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000 When spindle rotation is detected as slow (Not used) 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

35、specified range When CLV is unlocked When access operation is not performed normally Hexa- decimal Spindle is slow (Not used) 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 Reading the Display:

36、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 displayed: Higher bit : A = 1010 n b7

37、+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 1000 1001 1010 1011 1100 1101 1110

38、1111 8 SECTION 2 GENERAL Location of Parts and Controls 11/u (Power) switch 2Remote sensor 3Display window 4Disc compartment 5AMS knob 60/) buttons 7DISPLAY/CHAR button 8INPUT switch 9REC LEVEL knob !r REC (recording) button !p (stop) button !P (pause) button ! (play) button !YES button !EDIT/NO but

39、ton ! EJECT button 12345687 !? !?!? !? 9 !?!? !? 9 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. CASE AND FRONT PANEL ASSEMBLY 3-2. BRACKET (T), (L) AND (R) 4 Case 3 Screw (case 3 TP 2) 2 Two screws (Case 3 TP 2) 6 Flat type wire (CN303) claw 8 Four

40、 screws (BVTP38) 9 Remove the front panel assembly releasing two claws. claw 1 Two screws (Case 3 TP 2) 7 Three screws (BVTP38) 5 Ground terminal 1 Four screws (BVTT23) 4 Screw (BVTT23) 3 Screw (BVTT23) 5 Bracket (joint) 2 Bracket (T) 6 Two screws (BVTT23) 7 Bracket (L) 9 Bracket (R) 8 Two screws (B

41、VTT23) 10 3-3. BD BOARD 3-4. SUB CHASSIS 2 Flat type wire (15 core) 1 Flexible board (Over write head) 3 Screw (BVTT24) 5 BD board 4 OP relay flexible board 1 Two step screws 3 Two insulators 2 Two step screws 4 Two insulators 5 Sub chassis Part A Part A Part A NG OK Take care so that the part A may

42、 be right position when installing. 11 3-5. SHUTTER ASSEMBLY 3-6. OVER WRITE HEAD 1 Stepper washer 3 Shutter assembly 2 Shaft (shutter) Shutter assembly Shaft (lid) Hole B Hole A Shaft (shutter) When installing, install the shaft (shutter) into the hole A as shown in the figure before installing the

43、 shaft (lid) into the hole B. 1 Precision screw (P1.76) 2 Over write head 12 3-7. SLIDER COMPLETE ASSEMBLY Note for Installation of Slider Complete Assembly 3 Set the shaft of Gear (LA) to be at the position in the figure. 2 Retainer (gear) 1 Screw (M1.72) claw claw 4 Remove the slider complete asse

44、mbly in the direction of arrow with putting out of two claws. 45 Install the part A of lever (head up) to pass over the slider complete assembly. Part A Take care not to damage the detective switch. Slider assembly OK NG 13 SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE 1As loading relate

45、d 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 not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the EJECT button after pressing the EDIT/NO button and the rotation of disc is