sony_MDS-JE640_service_manual 维修电路图.pdf

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1、MDS-JE640 SPECIFICATIONS SERVICE MANUAL MINIDISC DECK Model Name Using Similar MechanismNEW MD Mechanism TypeMDM-7A Optical Pick-up TypeKMS-260B/J1N Canadian Model AEP Model UK Model E Model US and foreign patents licensed form Dolby Laboratories Licensing Corporation. Inputs Outputs SystemMiniDisc

2、digital audio system DiscMiniDisc LaserSemiconductor laser ( = 780 nm) Emission duration: continuous Laser output MAX 44.6 W1) 1) This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Laser diode Material: GaAlAs Re

3、volutions (CLV)400 rpm to 900 rpm Error correction ACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz CodingATRAC (Adaptive TRansform Acoustic Coding)/ATRAC 3 Modulation systemEFM (Eight-to-Fourteen Modulation) Number of channels 2 stereo channels Frequency response 5 to

4、 20,000 Hz 0.3 dB Signal-to-noiseratio Over 98 dB during play Wow and flutter Below measurable limit ANALOG IN Jack type: phono Impedance: 47 k Rated input: 500 mVrms Minimum input: 125 mVrms DIGITAL INConnector type: square optical Impedance: 660 nm (optical wave length) DIGITAL OPTICAL IN (AEP, UK

5、, CIS models) Connector type: square optical Impedance: 660 nm (optical wave length) DIGITAL COAXIAL IN (AEP, UK, CIS models) Jack type: phono Impedance: 75 Rated input: 0.5 Vp-p, 20 % PHONES (MDS-JE640 only) Jack type: stereo phone Rated output: 28 mW Load impedance: 32 ANALOG OUTJack type: phono R

6、ated output: 2 Vrms (at 50 k) Load impedance: over 10 k Continued on next page Photo: SILVER 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 codes for customers which are displayed automatically when errors occur, and error codes which show the e

7、rror 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 codes during servicing, refer to the following “Procedure for using the Self- Diagnosis Function (Error His

8、tory 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. The following describes the least required procedure. Be careful not to enter other modes by mistake. If

9、you set other modes accidentally, press the MENU/NO button to exit the mode. General Power requirements Supplied accessories Audio connecting cords (2) Optical cable (1) Remote commander (remote) (1) R6 (size-AA) batteries (2) US and foreign patents licensed from Dolby Laboratories. Design and speci

10、fications are subject to change without notice. DIGITAL OUTConnector type: square optical Rated output: 18 dBm Load impedance: 660 nm (optical wave length) DIGITAL OPTICAL OUT (AEP, UK, CIS models) Connector type: square optical Rated output: 18 dBm Load impedance: 660 nm (optical wave length) Where

11、 purchasedPower requirements Canadian120 V AC, 60 Hz AEP, UK, CIS220 230 V AC, 50/60 Hz Singapore, Malaysia 110 120 or 220 240 V AC selectable, 50/60 Hz Power consumption 15 W Dimensions (approx.) 430 95 285 mm (17 33/4 111/4 in.) (w/h/d) incl. projecting parts and controls Mass (approx.)3.1 kg (6 l

12、bs 14 oz) Self-diagnosis function The decks self-diagnosis function automatically checks the condition of the MD deck when an error occurs, then issues a three- or five-digit code and an error message on the display. If the code and message alternate, find them in the following table and perform the

13、 indicated countermeasure. Should the problem persist, consult your nearest Sony dealer. Three- or five- digit code/ Message Cause/Remedy C11/Protected The inserted MD is record-protected. , Take out the MD and close the record- protect slot (page 14). C12/Cannot Copy You tried to record a CD with a

14、 format that the external device connected to the deck does not support, such as CD-ROM or video CD. , Remove the disc and insert a music CD. C13/REC Error The recording was not made properly. , Set the deck in a stable surface, and repeat the recording procedure. The inserted MD is dirty (with smud

15、ges, fingerprints, etc.), scratched, or substandard in quality. , Replace the disc and repeat the recording procedure. C13/Read Error The deck could not read the TOC on the MD properly. , Take out the MD and insert it again. C14/Toc Error The deck could not read the TOC on the MD properly. , Insert

16、another disc. , If possible, erase all the tracks on the MD (page 32). C41/Cannot Copy The sound source is a copy of commercially available music software, or you tried to record a CD-R (Recordable CD). , The Serial Copy Management System prevents making a digital copy (page 52). You cannot record a

17、 CD-R. C71/Din Unlock The sporadic appearance of this message is caused by the digital signal being recorded. This will not affect the recording. While recording from a digital component connected through the DIGITAL IN connector, the digital connecting cable was unplugged or the digital component t

18、urned off. , Connect the cable or turn the digital component back on. E0001/ MEMORY NG There is an error in the internal data that the deck needs in order to operate. , Consult your nearest Sony dealer. E0101/ LASER NG There is a problem with the optical pickup. , The optical pick-up may have failed

19、. Consult your nearest Sony dealer. Three- or five- digit code/ Message Cause/Remedy 收音机爱好者资料库 Ra d i o Fa n s .CN 3 1. While pressing the AMS knob and x button, connect the power plug to the outlet, and release the AMS knob and x button. When the test mode is set, “Check” will be displayed. 2. Rota

20、te the AMS knob and when “Service” is displayed, press the YES button. 3. Rotate the AMS knob and display “Err Display”. 4. Pressing the YES button sets the error history mode and displays “op rec tm”. 5. Select the contents to be displayed or executed using the AMS knob. 6. Pressing the AMS knob wi

21、ll display or execute the contents selected. 7. Pressing the AMS knob another time returns to step 4. 8. Pressing the MENU/NO button displays “Err Display” and exits the error history mode. 9. To exit the test mode, press the REPEAT button. The unit sets into the STANDBY state, the disc is ejected,

22、and the test mode ends. ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS Selecting the Test Mode Display op rec tm op play tm spdl rp tm retry err total err err history retry adrs er refresh op change spdl change History Displays the total recording time. When the total recording time is more than 1 m

23、inute, displays the hour and minute When less than 1 minute, displays “Under 1 min” The display time is the time the laser is set to high power, which is about 1/4 of the actual recording time. Displays the total playback time. When the total playback time is more than 1 minute, displays the hour an

24、d minute When less than 1 minute, displays “Under 1 min” Displays the total rotating time of the spindle motor. When the total rotating time is more than 1 minute, displays the hour and minute When less than 1 minute, displays “Under 1 min” Displays the total number of retry errors during recording

25、and playback Displays “r xx p yy”. xx is the number of errors during recording. yy is the number of errors during playback. This is displayed in hexadecimal from 00 to FF. Displays the total number of errors Displays “total xx”. This is displayed in hexadecimal from 00 to FF. Displays the past ten e

26、rrors. Displays “0 x ErrCd”. X is the history number. The younger the number, the more recent is the history (00 is the latest). is the error code. Select the error history number using the AMS knob. Displays the past five retry addresses. Displays “xx ADRS yyyy”, xx is the history number, yyyy is t

27、he cluster with the retry error. Select the error history number using the AMS knob. Mode for erasing the error and retry address histories Procedure 1. Press the AMS knob when displayed as “er refresh”. 2. Press the YES button when the display changes to “er refresh?”. When “complete!” is displayed

28、, it means erasure has completed. Be sure to check the following after executing this mode. *Data has been erased. *Perform recording and playback, and check that the mechanism is normal. Mode for erasing the total time of op rec tm, op play tm. These histories are based on the time of replacement o

29、f the optical pickup. If the optical pick-up has been replaced, perform this procedure and erase the history. Procedure 1. Press the AMS knob when displayed as “op change”. 2. Press the YES button when the display changes to “op change?”. When “Complete!” is displayed, it means erasure has completed

30、. Mode for erasing the total spdl rp tm time These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced, perform this procedure and erase the history. Procedure 1. Press the AMS knob when displayed as “spdl change” 2. Press the YES button when t

31、he display changes to “spdl change?” When “Complete!” is displayed, it means erasure has completed. 收音机爱好者资料库 Ra d i o Fa n s .CN 4 Description TABLE OF CONTENTS 1. SERVICING NOTES .5 2. GENERAL. 11 3. DISASSEMBLY 3-1. Upper Case (408226) . 12 3-2. Front Panel Section . 12 3-3. Main Board . 13 3-4.

32、PT Board, VOL-SEL Board . 13 3-5. Mechanism Deck Section (MDM-7A). 14 3-6. BD Board . 14 4. TEST MODE. 15 5. ELECTRICAL ADJUSTMENTS. 20 6. DIAGRAMS 6-1. Circuit Boards Location. 31 6-2. Block Diagrams BD Section. 32 Main Section . 33 6-3. Printed Wiring Board BD Section . 35 6-4. Schematic Diagram B

33、D Section (1/2) . 36 6-5. Schematic Diagram BD Section (2/2) . 37 6-6. Printed Wiring Board Main Section (Side A) . 38 6-7. Printed Wiring Board Main Section (Side B) . 39 6-8. Schematic Diagram Main Section (1/3) . 40 6-9. Schematic Diagram Main Section (2/3) . 41 6-10. Schematic Diagram Main Secti

34、on (1/3) . 42 6-11. Printed Wiring Board Power Section . 43 6-12. Printed Wiring Board Display Section . 44 6-13. Schematic Diagram Display Section . 45 6-14. IC Block Diagrams. 46 6-15. IC Pin Functions. 48 7. EXPLODED VIEWS 7-1. Chassis Section . 54 7-2. Front Panel Section . 55 7-3. Mechanism Sec

35、tion-1 (MDM-7A). 56 7-4. Mechanism Section-2 (MDM-7A). 57 8. ELECTRICAL PARTS LIST. 58 Table of Error Codes Error Code 10 12 20 21 22 23 24 30 31 40 41 42 43 50 51 Could not load Loading switches combined incorrectly Timed out without reading the top of PTOC Could read top of PTOC, but detected erro

36、r Timed out without accessing UTOC Timed out without reading UTOC Error in UTOC Could not start playback Error in sector Retry cause generated during normal recording Retried in DRAM overflow Retry occurred during TOC writing Retry aborted during S.F editing Other than access processing, and could n

37、ot read address. Focus NG occurred and overran. MODEL IDENTIFICATION BACK PANEL Part No. Abbreviation SP: Singapore model MY: Malaysia model MODEL AEP, UK, CIS models Canadian model SP, MY models PARTS No. 4-228-638-0s 4-228-638-3s 4-228-638-4s 5 SECTION 1 SERVICE NOTES This appliance is classified

38、as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may r

39、esult in hazardous radia- tion 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

40、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. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break

41、-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily da

42、maged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK

43、 0 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 AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE 0

44、SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PISES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPMENTS PUBLIS PAR SONY. This caution label is located inside the unit. 6 JIG FOR CHECKING

45、BD BOARD WAVEFORM The special jig (J-2501-196-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 optical pick-up laser) TE: TRK error signal (Traverse adju