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1、SERVICE MANUAL MINIDISC DECK MICROFILM Continued on next page SPECIFICATIONS US Model Canadian Model AEP Model UK Model Model Name Using Similar Mechanism MDS-JA20ES MD Mechanism Type MDM-6A Base Unit Type MBU-5C Optical Pick-up Type KMS-260B/J1N MDS-JA555ES U.S. and foreign patents licensed from Do
2、lby Laboratories Licensing Corporation. Photo : GOLD System MiniDisc digital audio system Disc MiniDisc Laser Semiconductor laser (l =780 nm) Emission duration : continuous Laser output Less than 44.6 W* * This output is the value measured at a distance of 200 mm from the objective lens surface on t
3、he Optical Pick-up Block with 7 mm aperture. Laser diode properties Material: GaAlAs Revolutions (CLV) 400 rpm to 900 rpm Error correction ACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz Coding ATRAC (Adaptive TRansform Acoustic Coding) Modulation system EFM (Eight-to
4、-Fourteen Modulation) Number of channels 2 stereo channels Frequency response 5 Hz to 20,000 Hz 0.3 dB Signal-to-noise ratio Over 105 dB during playback Wow and flutter Below measurable limit Inputs Jack Input Rated Minimum type impedance input input LINE Phono (ANALOG) jacks 47 kW 500 mVrms 125 mVr
5、ms IN DIGITAL Square Optical wave IN optical length OPT1 connector 660 nm jack DIGITAL Square Optical wave IN optical length OPT2 connector 660 nm jack DIGITAL Phono 0.5 Vp-pIN jack 75 W 20% COAXIAL2 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE
6、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 ! SUR LES DI
7、AGRAMMES 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.After correcting the original service problem, perform the following safety c
8、hecks 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. LEAKAGEThe AC leakage from any exposed metal part to earth ground and from all exposed metal parts
9、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 commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A b
10、attery-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 have an accurate low-voltage scale. The Si
11、mpson 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) SAFETY CHECK-OUT 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
12、 to check AC leakage. CAUTION Danger of explosion if battery 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 hndte
13、ring. Udskiftning m kun ske med batteri af samme fabrikat 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 henh
14、old til fabrikantens VARNIG Explosionsfara vid felaktigt 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. V aihda paristo ainoastaan lait
15、evalmistajan suosittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti. Output Jack Rated Load type output impedance PHONES Stereo phone 28 mW 32 W jacks LINE(ANALOG) Phono 2 Vrms Over OUT jacks (at 50 kW) 10 kW DIGITAL OUT Square 18 dBm Optical OPTICAL optical Wave length connec
16、tor 660 nm jack DIGITAL OUT Phono 0.5 Vp-p 75 W COAXIAL jack (at 75 W) General Power requirements Where purchased Power requirements Continnental Europe and UK 220V 230V AC, 50/60 Hz U.S.A. and Canada 120 V AC, 60 Hz Power consumption 24 W Dimensions (approx.)(w/h/d) incl. projecting parts and contr
17、ols 430 125.5 375.5 mm (17 5 13 3 /4 in.) Mass (approx.) 15.3 kg (33 lbs 11 oz) Supplied accessories Audio connecting cords (2) Remote commander (remote) RM-D34M (1) R6 (size-AA) batteries (2) Design and specifications are subject to change without notice.3 This appliance is classified as a CLASS 1
18、LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. The following caution label is located inside the unit. 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 procedu
19、res 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. Flexible Circuit Board Repairing Keep the temperature of solderi
20、ng 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. MODEL IDENTIFICATION BACK PANEL Parts No. 4-220-300-1 : AEP, UK model 4-220-300-2 : US mode
21、l 4-220-300-3 : Canadian model TABLE OF CONTENTS 1. SERVICING NOTE 6 2. GENERAL 12 3. DISASSEMBLY 3-1. Case 14 3-2. Loading Panel 14 3-3. Front Panel Assembly 15 3-4. MD Mechanism Deck 15 3-5. Tray Assembly 16 3-6. BU Holder Assembly 17 3-7. Motor (Loading) Assembly (M10) 17 3-8. Base Unit (MBU-5C)
22、18 3-9. BD Board 18 3-10. Over Light Head (HP901) 19 3-11. Mini Disc Device (KMS-260B/JN) 19 4. TEST MODE 20 5. ELECTRICAL ADJUSTMENTS 25 6. DIAGRAMS 6-1. Block Diagrams BD Section 34 MAIN Section 35 Display/Power Supply Section 36 6-2. Circuit Boards Location 37 6-3. Printed Wiring Board BD Section
23、 38 6-4. Schematic Diagram BD (2/1) Section 39 6-5. Schematic Diagram BD (2/1) Section 40 6-6. Schematic Diagram BD Switch Section 41 6-7. Printed Wiring Board BD Switch Section 41 6-8. Printed Wiring Board AD Section 42 6-9. Schematic Diagram AD (2/1) Section 43 6-10. Schematic Diagram AD (2/1) Sec
24、tion 44 6-11. Schematic Diagram DA (2/1) Section 45 6-12. Printed Wiring Board DA Section 48 6-13. Schematic Diagram DA (2/1) Section 47 6-14. Printed Wiring Board Digital Section 48 6-15. Schematic Diagram Digital Section 50 6-16. Printed Wiring Board AC Section 51 6-17. Schematic Diagram Power Sec
25、tion 52 6-18. Printed Wiring Board Power Section 53 6-19. Printed Wiring Board Panel Section 54 6-20. Schematic Diagram Panel Section 55 6-21. IC Block Diagrams 57 6-22. IC Pin Functions 62 7. EXPLODED VIEWS 7-1. Upper Case Assembly 71 7-2. Front Panel Assembly 72 7-3. Chassis Assembly 73 7-4. Mecha
26、nism Deck Assembly-1 (MDM-6A) 74 7-5. Mechanism Deck Assembly-2 (MDM-6A) 75 7-6. Base Unit (MBU-5C) 76 8. ELECTRICAL PARTS LIST 774 SELF-DIAGNOSIS FUNCTION The self-diagnosis function consists of the error codes for users and those for service engineers. The error codes for users appear automati- ca
27、lly when an error occurs. The error codes for service engineers can be accessed by entering the test mode during servicing and by viewing the error history display. The error codes for users are shown below that are extracted from Operation Manual. For the error codes for service engineers, refer to
28、 the subsequent paragraph “How to Operate the Self-diagnosis Function (Error History Display Mode)”. How to Operate Self-diagnosis Function (Error History Display Mode) Note: The self-diagnosis function is performed using the “error history display mode” using the test mode. The following procedure
29、describes only the minimum required operating procedure to enter the error history mode. Therefore be careful not to enter any other modes by mistake. If you have entered any other modes by mistake, press the MENU/NO button and exit the mode. 1. While pressing the lAMSL knob and the x button at the
30、same time, connect the AC power plug to the wall outlet, then remove your hands from the lAMSL knob and x button at the same time. When the MDS-JA555ES enters the test mode, the message “Check” appears and the STANDBY , PITCH CONTROL, and FILTER LEDs turn on. 2. Rotate the lAMSL knob until the messa
31、ge “Service” appears. Then press the YES button. 3. Rotate the lAMSL knob until the message “ERR DP MODE” appears. 4. Press the YES button to enter the error history mode and the message “total rec” appears. 5. Select the desired item to display or to execute using the lAMSL knob. 6. Press the lAMSL
32、 knob to display or execute the selected item. 7. Pressing the lAMSL knob again returns to the display of step 4. 8. To exit the error history mode, press the MENU/NO button. The message “ERR DP MODE” appears to exit the error history mode. 9. To exit the test mode, press the REPEAT button. The test
33、 mode display disappears and the PITCH CONTROL and FILTER LEDs are turned off. The MDS-JA555ES enters the standby state exiting the test mode. While pressing the ?/1 button, turn on the main power. The message “Initialize” flashes and the MDS-JA555ES is initialized.5 Displaying Contents of the Error
34、 History Display on screen total rec total play retry err total err err history er refresh tm refresh Contents of error history Displays the recording time. The display appears in “r h”. This is the accumulated time when the laser is in the “high power” operation. This is about 1/4 of the actual rec
35、ording time. The time is shown in the range of 0h to 65535h in hexadecimal number. Displays the playback time. The display appears in “p h”. This is the accumulated time of actual playback in which pause time is not counted. The time is shown in the range of 0h to 65535h in hexadecimal number. Displ
36、ays the accumulated count of record retry errors and playback retry errors. The display appears in “r p ”. “r” indicates the record retry error count, and “p” indicates the playback retry error count. The retry count is shown in the range of 00 to FF in hexadecimal number. Displays the total error c
37、ount. The message “total ” appears. The count is shown in the range of 00 to FF in hexadecimal number. Displays the error contents from the latest error to the last ten errors. “0 E” appears. The history number is shown in . The smaller number means the newer history. (00 is the newest error.) The e
38、rror code is indicated by . Refer to the following table for the contents of the error codes. The error histories can be switched by rotating the lAMSL knob. This mode is used to delete the histories of “retry err”, “total err”, and “err history”. Before returning the repaired product to the custome
39、r, perform this operation to delete the past error history. To delete the history, press the lAMSL knob and press the YES button after “er refresh?” appears. “Complete!” appears for a moment and returns to the ERR DP MODE. When this mode is executed, be sure to check the following. The data have bee
40、n deleted. Perform recording and playback. Check that the mechanism operates normally. This mode is used to delete the histories of “total rec” and “total play”. These histories are used as reference when replacing the optical pick-up. When the optical pick-up is replaced, perform this operation to
41、delete the histories. Press the lAMSL knob. After “tm refresh?” appears, press the YES button to delete the histories. “Complete!” appears for a moment and returns to the ERR DP MODE. When this mode is executed, be sure to check the following. The data have been deleted. Perform recording and playba
42、ck and check that the mechanism operates normally. Error code table Error code Error contents E00 No errors E01 Disc error Cannot read PTOC (Disc is ejected) E02 Disc error UTOC error (Disc is not ejected) E03 Loading error E04 Cannot read the address (Out of servo) Error code Error contents E05 Out of FOK E06 Focus does not lock (Out of servo) E07
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