sony_MDS-S50_service_manual 维修电路图.pdf

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1、SERVICE MANUAL Ver 1.0 2001.02 9-929-257-11Sony Corporation 2001B0500-1Audio Entertainment Group C 2001.2General Engineering Dept. MINIDISC DECK US Model Canadian Model AEP Model UK Model E Model Australian Model SPECIFICATIONS MDS-S50 Model Name Using Similar MechanismNEW MD Mechanism TypeMDM-7A Op

2、tical Pick-up NameKMS-260B Photo: Gray model SystemMiniDisc digital audio system DiscMiniDisc LaserSemiconductor laser ( = 780 nm) Emission duration: continuous Laser outputMAX 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

3、 Block with 7 mm aperture. Laser diodeMaterial: GaAlAs Revolutions (CLV)400 rpm to 900 rpm Error correctionACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency44.1 kHz CodingATRAC (Adaptive TRansform Acoustic Coding)/ATRAC 3 Modulation systemEFM (Eight-to-Fourteen Modulation) Numbe

4、r of channels2 stereo channels Frequency response5 to 20,000 Hz 0.3 dB Signal-to-noise ratioOver 96 dB during play Wow and flutterBelow measurable limit Inputs ANALOG INJack type: phono Impedance: 47 kilohms Rated input: 500 mVrms Minimum input: 125 mVrms DIGITAL INConnector type: square optical Imp

5、edance: 660 nm (optical wave length) Outputs PHONESJack type: stereo phone Rated output: 10 mW Load impedance: 32 ohms ANALOG OUTJack type: phono Rated output: 2 Vrms (at 50 kilohms) Load impedance: over 10 kilohms General Power requirements US and Canadian models: 120 V AC, 60Hz AEP, UK models:230

6、V AC, 50/60Hz Australian models:240 V AC, 50/60Hz Hong Kong models:220-240 V AC, 50/60Hz Other models:110-120/220-240 V AC, 50/60Hz Adjustable with voltage selector Power consumption15 W Dimensions (approx.)280 84.5 290 mm (w/ h/d) incl. projecting parts and controls Mass (approx.)2.4 kg Supplied ac

7、cessories Audio connecting cords (2) Optical cable (1) Remote commander (remote) (1) R6 (size-AA) batteries (2) Design and specifications are subject to change without notice. US and foreign patents licensed from Dolby Laboratories. 收音机爱好者资料库 Ra d i o Fa n s .CN 2 MDS-S50 PROCEDURE FOR USING THE SEL

8、F-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 you set other modes accidentally, press the MENU/

9、NO button to release the mode. 1.While pressing the AMS knob andxbutton simultaneously, connect the power plug to the outlet, and release the AMS knob andxbutton simultaneously to display “Check”. 2.Turn the AMS knob and when “Service” is displayed, press the YES button to display “AUTO CHECK” (C01)

10、. 3.Turn the AMS knob to display “Err Display” (C02). 4.Press the YES button to sets the error history mode and displays “op rec tm”. 5.Select the contents to be displayed or executed using the AMS knob. 6.Press the AMS knob to display or execute the contents selected. 7.Press the AMS knob another t

11、ime returns to step 4. 8.Press the MENU/NO button to display “Err Display” (C02) and release the error history mode. 9.To release the test mode, press theI/1button. The unit sets into the STANDBY state, and the test mode ends. SELF-DIAGNOSIS FUNCTION The decks self-diagnosis function automatically c

12、hecks 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 indicated countermeasure. Should the problem persist, consult your nearest Sony de

13、aler. C11/Protected , Take out the MD and close the record-protect slot. 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 the disc and insert a music CD. C13/REC Error , Set the deck in a stab

14、le 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 procedure. C13/Read Error , Take out the MD and insert it again. C14/TOC Error , Insert another disc. , If po

15、ssible, erase all the tracks on the MD. 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. You cannot record a CD-R. C71/Din Unlock The sporadic appear

16、ance 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 turned off. , Connect the cable or turn th

17、e digital component back on. . . . . . . . 收音机爱好者资料库 Ra d i o Fa n s .CN 3 MDS-S50 ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS DisplayDetails of History op rec tmCumulative recording time is displayed. When cumulative recording time is over 1 minute, the hour and minute are displayed as they are.

18、 When it is under 1 minute, “Under 1 min” is displayed. The displayed time is the total time the laser is set to the high power state. This is about 1/4 of the actual recording time. The time is displayed in decimal digits. op play tmCumulative playing time is displayed. When cumulative playing time

19、 is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, “Under 1 min” is displayed. The displayed time is the total of the actual play time. Pauses are not counted. The time is displayed in decimal digits. spdl rp tmCumulative spindle motor running time is displa

20、yed. When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are. When it is under 1 minute, “Under 1 min” is displayed. The time is displayed in decimal digits. retry errDisplays the total number of retries during recording and number of retry errors durin

21、g playback. Displayed as “r ss p ss”. “r” indicates the retries during recording while “p” indicates the retry errors during playback. The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF. total errDisplays the total number of errors. Displayed as “total ss”. The

22、number of errors is displayed in hexadecimal digits from 00 to FF. err historyDisplays the 10 latest errors. Displayed as “0s ErrCd ”. s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest) indicates the error code. Refer to the following table for t

23、he details. The error history can be switched by turning the AMS knob. retry adrsDisplay the 5 latest retry address. Display as “ss ADRS”. ss indicates the history number. The smaller the number, the more recent is the error. (00 is the latest) indicates the cluster of retry address. The number of r

24、etry address can be switched by turning the AMS knob. er refreshMode to clear the error history and retry address history. Procedure: 1) Press the AMS button. 2) The display will change to “er refresh?”, and then press the YES button. The operation is over if “Complete!” is displayed. After this mod

25、e was executed, check the following: The data have been cleared. Perform the recording and playing to check that the mechanism operates normally. op changeMode to clear cumulative time of “op rec tm” and “op play tm”. These historical data are used to determine the timing when the optical pick-up is

26、 to be replaced. When the optical pick-up was replaced, perform this operation to clear historical data. Procedure: 1) Press the AMS button. 2) The display will change to “op chang?”, and then press the YES button. The operation is over if “Complete!” is displayed. spdl changeMode to clear cumulativ

27、e time of “spdl rp tm”. This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle motor was replaced, perform this operation to clear historical data. Procedure: 1) Press the AMS button. 2) The display will change to “spdl chang?”, and then press

28、 the YES button. The operation is over if “Complete!” is displayed. . . . . . 收音机爱好者资料库 Ra d i o Fa n s .CN 4 MDS-S50 Error CodeDetails of Error 10Loading failed 12Loading switch combination is illegal 20Head of PTOC could not be read within the specified time 21Head of PTOC could be read but its co

29、ntent is erroneous 22Access to UTOC could not be made within the specified time 23UTOC could be not read within the specified time 24Content of UTOC is erroneous 30Playing could not start 31Content of sector is erroneous 40Cause of retry occurred during normal recording 41D-RAM overflowed and retry

30、was executed 42Retry was executed during the writing to TOC 43S.F editing was interrupted by retry 50Address could not be read except in access processing 51Focusing failed and it is out of control 60Unlock retry Table of Error Codes 5 MDS-S50 TABLE OF CONTENTS SELF-DIAGNOSIS FUNCTION.2 1.SERVICING

31、NOTES.7 2.GENERAL. 12 3.DISASSEMBLY 3-1.Disassembly Flow . 14 3-2.Case . 15 3-3.MD Mechanism Deck (MDM-7A). 15 3-4.MAIN Board . 16 3-5.BD Board. 16 4.TEST MODE. 17 5.ELECTRICAL ADJUSTMENTS. 22 6.DIAGRAMS 6-1.Block Diagram SERVO Section . 33 6-2.Block Diagram MAIN Section . 34 6-3.Note for Printed Wi

32、ring Boards and Schematic Diagrams . 35 6-4.Printed Wiring Boards BD Board . 37 6-5.Schematic Diagram BD Board (1/2) . 38 6-6.Schematic Diagram BD Board (2/2) . 39 6-7.Printed Wiring Board MAIN Board (Component Side) . 40 6-8.Printed Wiring Board MAIN Board (Conductor Side) . 41 6-9.Schematic Diagra

33、m MAIN Board (1/3) . 42 6-10. Schematic Diagram MAIN Board (2/3) . 43 6-11. Schematic Diagram MAIN (3/3)/PT/VOL SEL Boards . 44 6-12. Printed Wiring Boards PT/VOL SEL Boards . 45 6-13. Printed Wiring Boards DISPLAY/POWER SW Boards . 46 6-14. Schematic Diagram DISPLAY/POWER SW Boards . 47 6-15. IC Pi

34、n Function Description . 51 7.EXPLODED VIEWS 7-1.Case Section . 58 7-2.Front Panel Section . 59 7-3.Mechanism Deck Section-1 (MDM-7A). 60 7-4.Mechanism Deck Section-2 (MDM-7A). 61 8.ELECTRICAL PARTS LIST. 62 ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SU

35、R LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0

36、 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 PUB- LISHED BY SONY. 6 MDS-S50 This appliance is classified as a CLASS 1 LASER prod

37、uct. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside the unit. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit

38、 Board Repairing Keep the temperature of the soldering iron around 270 C dur- ing 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. ADVARSEL Eksplosjonsfare ved feilakt

39、ig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner. VARNING Explosionsfara vid felaktigt batteribyte. Anvnd samma batterityp eller en likvrdig typ som rekommenderas av apparattill

40、verkaren. Kassera anvnt batteri enligt gllande freskrifter. VAROITUS Paristo voi rjht, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti. ADVARSEL! Lithiumbatteri-Eksplosionsfare ved fejlagtig

41、hndtering. Udskiftning m kun ske med batteri af samme fabrikat og type. Levr det brugte batteri tilbage til leverandren. CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to

42、the manufacturers instructions. SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety check 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

43、leakage as described below. LEAKAGE TEST 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 microamperes.). Leakage current can be measured by any one of three methods. 1.A comm

44、ercial 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 voltage drop across a resistor by means of a VOM or

45、 battery-operated AC voltmeter. The “limit” indica- tion is 0.75 V, so analog meters must have an accurate low- voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex- amples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) Fig. A.Using an AC voltmeter to check AC leakage. 1.5 k0.15 F AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground C