sony_MDS-JE440_service_manual 维修电路图.pdf

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1、MDS-JE440 SPECIFICATIONS SERVICE MANUAL MINIDISC DECK Model Name Using Similar MechanismNEW MD Mechanism TypeMDM-7A Optical Pick-up TypeKMS-260B/J1N US Model Canadian Model AEP Model UK Model E Model Australian Model US and foreign patents licensed form Dolby Laboratories Licensing Corporation. Inpu

2、ts Outputs SystemMiniDisc 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

3、 diode Material: GaAlAs Revolutions (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 channe

4、ls Frequency response 5 to 20,000 Hz 0.3 dB Signal-to-noiseratio Over 96 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) A

5、NALOG OUTJack type: phono Rated output: 2 Vrms (at 50 k) Load impedance: over 10 k DIGITAL OUTConnector type: square optical Rated output: 18 dBm Load impedance: 660 nm (optical wave length) 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 self-diagnosis function co

6、nsists 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 manual. For details on how t

7、o 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 history display mode” in

8、 the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode. Self-diagnosis function The decks self-diagnosis function automatically checks the condition of the MD

9、 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 indicated countermeasure. Should the problem persist, consult your nearest Sony dealer. Three- or five- digit c

10、ode/ 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 format that the external device connected to the deck does not support, such as CD-ROM or video CD. , Remove th

11、e 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 smudges, fingerprints, etc.), scratched, or substandard in quality. , Replace the disc and repeat the recording proc

12、edure. 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 another disc. , If possible, erase all the tracks on the MD (page 32). C41/Cannot Copy The sound source is a cop

13、y 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 CD-R. C71/Din Unlock The sporadic appearance of this message is caused by the digital signal being recorded. Th

14、is 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 turned off. , Connect the cable or turn the digital component back on. E0001/ MEMORY NG There is an error in the

15、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. Consult your nearest Sony dealer. Three- or five- digit code/ Message Cause/Remedy General Power requirements

16、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 specifications are subject to change without notice. Where purchasedPower requirements US, Canadian120 V AC,

17、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.)3.0 kg (6 lbs 10 oz) Australian240 V AC, 50/60 Hz Hong Kon

18、g220 240 V AC, 50/60 Hz 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. Rotate the AMS knob and when “Service” is displayed, press the YE

19、S 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 will display or execute the contents selected. 7. Pressing the

20、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, and the test mode ends. ITEMS OF ERROR HISTORY MODE ITEMS AND

21、 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 minute, displays the hour and minute When less than 1 minute,

22、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 and minute When less than 1 minute, displays “Under 1 min” Disp

23、lays 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 and playback Displays “r xx p yy”. xx is the number of errors

24、 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 errors. Displays “0 x ErrCd”. X is the history number. The you

25、nger 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 the cluster with the retry error. Select the error history num

26、ber 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, it means erasure has completed. Be sure to check the follow

27、ing 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 of the optical pickup. If the optical pick-up has been replace

28、d, 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. Mode for erasing the total spdl rp tm time These histories

29、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 the display changes to “spdl change?” When “Complete!” is disp

30、layed, 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. PT Board, VOL-SEL Board . 13 3-5. Mechanism Deck Section (MDM

31、-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 BD Section (1/2) . 36 6-5. Schematic Diagram BD Section (2/2)

32、. 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 Section (1/3) . 42 6-11. Printed Wiring Board Power Section . 43 6

33、-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 Section-1 (MDM-7A). 56 7-4. Mechanism Section-2 (MDM-7A). 57 8.

34、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 error Timed out without accessing UTOC Timed out without reading

35、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 not read address. Focus NG occurred and overran. MODEL IDENTIF

36、ICATION BACK PANEL Part No. Abbreviation CND: Canadian model SP: Singapore model MY: Malaysia model HK: Hong Kong model AUS: Australian model MODEL AEP, UK, CIS models US model CND model SP, MY models HK model AUS model PARTS No. 4-228-639-0s 4-228-639-1s 4-228-639-2s 4-228-639-3s 4-228-639-4s 4-228

37、-639-5s 5 SECTION 1 SERVICE NOTES This appliance is classified 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 pe

38、rformance of procedures other than those specified herein may result 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

39、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. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser di

40、ode in the optical pick-up block may suffer electrostatic break-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 i

41、s included in the repair parts. The flexible board is easily damaged 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 WA

42、RNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 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 AYA

43、NT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE 0 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. Thi

44、s caution label is located inside the unit. SAFETY CHECK-OUT (US model only) After correcting the original service problem, perform the fol- lowing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal

45、 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). 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