Sony MDS-JE520 Service Manual

Sony MDS-JE520 Service Manual

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SERVICE MANUAL
MICROFILM
MDS-JE520
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Type
SPECIFICATIONS
– 1 –
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
NEW
MDM-5A
KMS-260A/J1N
— Continued on next page —
MINIDISC DECK

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Summary of Contents for Sony MDS-JE520

  • Page 1 MDS-JE520 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model Australian Model Model Name Using Similar Mechanism MD Mechanism Type MDM-5A Optical Pick-up Type KMS-260A/J1N SPECIFICATIONS — Continued on next page — MINIDISC DECK MICROFILM – 1 –...
  • Page 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 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.
  • Page 3 ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS Selecting the Test Mode Display Details of History Displays the recording time. total rec Displayed as “rππππππh”. 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.
  • Page 4 REPLACE THESE COMPONENTS WITH SONY PARTS FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
  • Page 5: Table Of Contents

    SAFETY CHECK-OUT TABLE OF CONTENTS After correcting the original service problem, perform the follow- 1. SERVICING NOTE ............6 ing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, 2. GENERAL ................
  • Page 6: Servicing Note

    SECTION 1 SERVICING NOTE JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-149-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) : TRK error signal (Traverse adjustment)
  • Page 7 LASER POWER METER When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (J-2501-145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of the pick-up. External View of MD Laser Power Meter 8010S IOP DATA RECORDING AND DISPLAY WHEN PICKUP AND NON-VOLATILE MEMORY (IC171 OF BD BOARD) ARE REPLACED...
  • Page 8 CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”. Criteria for Determination Measure if unsatisfactory: (Unsatisfactory if specified value is not satisfied) Laser power check •...
  • Page 9 RETRY CAUSE DISPLAY MODE • In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit. •...
  • Page 10 Reading the Track Mode Display Higher Bits Lower Bits Details Hexa- Hexadecimal decimal b7 b6 b5 b4 b3 b2 b1 b0 When 0 When 1 Binary Emphasis OFF Emphasis ON Stereo Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Invalid Digital copy...
  • Page 11: General

    SECTION 2 GENERAL Front Panel 11 12 13 14 15 16 17 Location of Parts and Controls 1 STANDBY indicator 2 1/u button 3 PLAY MODE button 4 FADER button 5 REPEAT button 6 SCROLL button 7 LEVEL/DISPLAY/CHAR button 8 TIME button 9 DISK compartment 10 §...
  • Page 28: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 3-1. CASE AND FRONT PANEL 3 Case 2 Two screws (Case) 1 Two screws (Case) 4 Flat type wire (CN421) 5 Connector (CN391) 7 Front panel assembly 6 Six screws (BVTP3x8) 3-2.
  • Page 29: Base Unit (Mbu-5A) And Bd Board

    3-3. BASE UNIT (MBU-5A) AND BD BOARD 2 Base unit (MBU-5A) 5 Flexible board (CN104) 6 Flexible board (CN101) 1 Three screws (BTP2.6x6) 3 Remove the solder (Five portion) 7 BD board 4 Screw (M1.7x4) 3-4. SW BOARD AND LOADING MOTOR (M103) 1 Screw (PTPWH M2.6x6) 2 Gear B 3 Two screws...
  • Page 30: Test Mode

    SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE • As loading related 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.
  • Page 31 4-5. SELECTING THE TEST MODE There are 31 types of test modes as shown below. The groups can be switched by rotating the AMS knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the AMS knob switches between these modes. Refer to “Group”...
  • Page 32 4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the AMS knob and display “CPLAY MODE” (C30). 3 Press the YES button to change the display to “CPLAY MID”. 4 When access completes, the display changes to “C1 = AD = ”.
  • Page 33 4-6. FUNCTIONS OF OTHER BUTTONS Function Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed.
  • Page 34 MEANINGS OF OTHER DISPLAYS Contents Display When Lit When Off During continuous playback (CLV: ON) STOP (CLV: OFF) Tracking servo OFF Tracking servo ON Recording mode ON Recording mode OFF CLV low speed mode CLV normal mode –SYNC ABCD adjustment completed A.SPACE Tracking offset cancel ON Tracking offset cancel OFF...
  • Page 35: Electrical Adjustments

    SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. PARTS REPLACEMENT AND ADJUSTMENT • Check and adjust the MDM and MBU as follows. The procedure changes according to the part replaced • Abbreviation : Optical pick-up OWH: Overwrite head • Temperature compensation offset check •...
  • Page 36 5-2. PRECAUTIONS FOR CHECKING LASER DIODE 4) Use the following tools and measuring devices. • Check Disc (MD) TDYS-1 EMISSINON (Parts No. 4-963-646-01) To check the emission of the laser diode during adjustments, never • TEST DISK (MDW-74/AU-1) (Parts No. 8-892-341-41) view directly from the top as this may lose your eye-sight.
  • Page 37 5-6. CHECKS PRIOR TO REPAIRS Note 1: After step 4, each time the YES button is pressed, the display will be switched between “LD 0.7 mW $ ”, “LD These checks are performed before replacing parts according to 6.2 mW $ ”, and “LD Wp ”.
  • Page 38 5-6-4. Focus Bias Check 10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. Change the focus bias and check the focus tolerance amount. Checking Procedure : (Traverse Waveform) 1.
  • Page 39 5-7. INITIAL SETTING OF ADJUSTMENT VALUE 5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT Note: Save the temperature data at that time in the non-volatile memory Mode which sets the adjustment results recorded in the non-volatile as 25 ˚C reference data. memory to the initial setting value. However the results of the Note : temperature compensation offset adjustment will not change to the 1.
  • Page 40 5-11. TRAVERSE ADJUSTMENT 7. Then, rotate the AMS knob and display “LDPWR CHECK” (C02). Connection : 8. Press the YES button once and display “LD 0.9 mW $ ”. Oscilloscope Check that the reading of the laser power meter become 0.85 to 0.91 mW.
  • Page 41 5-12. FOCUS BIAS ADJUSTMENT 11. Rotate the AMS knob until the waveform of the oscilloscope moves closer to the specified value. Adjusting Procedure : In this adjustment, waveform varies at intervals of approx. 2%. 1. Load a test disk (MDW-74/AU-1). Adjust the waveform so that the specified value is satisfied as 2.
  • Page 42 5-13. ERROR RATE CHECK 5-15. AUTO GAIN CONTROL OUTPUT LEVEL 5-13-1. CD Error Rate Check ADJUSTMENT Checking Procedure : Be sure to perform this adjustment when the pickup is replaced. 1. Load a check disc (MD) TDYS-1. If the adjustment results becomes “Adjust NG!”, the pickup may be 2.
  • Page 43 5-15. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (SIDE A) CN101 D101 CN110 I+3V NOTE IC171 [BD BOARD] (SIDE B) IC101 IC121 IC192 NOTE:It is useful to use the jig. for checking the waveform. (Refer to Servicing Note on page 6.) –...
  • Page 44: Diagrams

    SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION SW board BD board MAIN board POWER SW board HP board DISPLAY board KEY SW board – 44 –...
  • Page 45: Bd Section

    MDS-JE520 6-2. BLOCK DIAGRAMS DIGITAL SERVO SIGNAL PROCESSOR, DIGITAL SIGNAL PROCESSOR EFM/ACIRC ENCODER/DECODER, SHOCK-PROOF MEMORY CONTROLLER, – BD SECTION – ATRAC ENCODER/DECODER OVER WRITE HEAD DRIVE IC121 IC181 SCTX XINT HR901 • Signal path OVER WRITE • DIN0 HEAD DIN0...
  • Page 46: Main Section

    MDS-JE520 US, CND OPTICAL IC621 – MAIN SECTION – IN 2 IC601 EXCEPT US, CND COAXIAL A/D, D/A CONVERTER OPTICAL IN 1 IC321 IC601 DIGITAL IC611 DIN0 INLM INLP ADDT INRP CONVERTER DIN1 R-ch INRM R-ch OPTICAL OUT 10 11...
  • Page 47 THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For schematic diagrams. Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
  • Page 48 MDS-JE520 WAVEFORMS • BD BOARD (1/2) • MAIN BOARD 0.46Vp-p 3.2Vp-p 7MHz IC101 1, 2 (I, J) (PLAY mode) IC501 !£ (XOUT) 0.1Vp-p 3.3Vp-p 44.1kHz IC101 4 (A) (PLAY mode) IC321 0 (LRCK1), @• (LRCK) 0.06Vp-p 5.2Vp-p 2.822MHz IC101 8, 9 (E, F) (PLAY mode) IC321 !¡...
  • Page 49: Printed Wiring Board - Bd Section

    MDS-JE520 6-3. PRINTED WIRING BOARD — BD SECTION — • See page 44 for Circuit Boards Location. BD BOARD (SIDE A) • Indication of transistor • Semiconductor Location Ref. No. Location These are omitted D101 D181 D183 IC103 IC171 Q102...
  • Page 50 (Page 62) (Page 62) BD BOARD (SIDE B) • Semiconductor Location Ref. No. Location IC101 IC121 IC123 IC124 IC152 IC181 IC192 Q101 Q162 Q163 Q181 Q182 – 52 –...
  • Page 51 MDS-JE520 6-4. SCHEMATIC DIAGRAM – BD SECTION – (1/2) • See page 50 for Waveforms. • See page 68 for IC Block Diagrams. • See page 72 for IC Pin Functions. (Page 55) (Page 56) (Page 56) (Page 56) (Page 55)
  • Page 52: Schematic Diagram - Bd Section - (1/2)

    MDS-JE520 SCHEMATIC DIAGRAM – BD SECTION – (2/2) • See page 50 for Waveforms. • See page 51 Printed Wiring Board. • See page 69 for IC Block Diagrams. • See page 73 for IC Pin Functions. (Page 53) (Page 53)
  • Page 53: Schematic Diagram - Bd Section - (2/2)

    MDS-JE520 6-5. SCHEMATIC DIAGRAM – MAIN SECTION – (1/2) • See page 50 for Waveforms. • See page 61 Printed Wiring Board. • See page 70 for IC Block Diagrams. • See page 76 for IC Pin Functions. (Page 67)
  • Page 54: Schematic Diagram - Main Section - (1/2)

    MDS-JE520 SCHEMATIC DIAGRAM – MAIN SECTION – (2/2) • See page 50 for Waveforms. • See page 76 for IC Pin Functions. • See page 70 for IC Block Diagrams. (Page 57) (Page 57) (Page 58) (Page 58) (Page (Page (Page 66) –...
  • Page 55: Printed Wiring Board - Main Section

    MDS-JE520 6-6. PRINTED WIRING BOARD – MAIN SECTION – • See page 44 for Circuit Boards Location. (Page 64) (Page 63) (Page 67) (Page 52) (Page 52) • Semiconductor Location • Indication of transistor Ref. No. Location Ref. No. Location...
  • Page 56: Printed Wiring Board - Panel Section

    MDS-JE520 6-7. PRINTED WIRING BOARD – PANEL SECTION – • See page 44 for Circuit Boards Location. (Page 62) (Page 61) • Indication of transistor These are omitted – 63 – – 64 –...
  • Page 57: Schematic Diagram - Panel Section

    MDS-JE520 6-8. SCHEMATIC DIAGRAM – PANEL SECTION – • See page 50 for Waveforms. • See page 78 for IC Pin Functions. (Page 59) (Page 59) – 65 – – 66 –...
  • Page 58: Schematic Diagram - Bd Switch Section

    MDS-JE520 6-9. SCHEMATIC DIAGRAM – BD SWITCH SECTION – (Page 57) 6-10. PRINTED WIRING BOARD – BD SWITCH SECTION – • See page 44 for Circuit Boards Location. (Page 61) – 67 –...
  • Page 59: Ic Block Diagrams

    6-11. IC BLOCK DIAGRAMS • BD section IC101 CXA2523AR 43 42 USROP – RF AGC – USRC RFA1 BPF3T RFA2 PEAK3T – HLPT –1 – – –2 – CFST PTGR TEMP PEAK – –2 – BOTTOM 36 BOTM – –1 –...
  • Page 60 IC121 CXD2654R 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 SPINDLE GENERATOR SERVO 75 TE MNT0 74 SE MNT1 MONITOR EACH 73 AVSS CONTROL BLOCK MNT2...
  • Page 61 • MAIN section IC310 M5293L REFERENCE VOLTAGE REFERENCE ON/OFF – VOLTAGE OVERHEAT OVERCURRENT PROTECTION LIMITTER IC321 CXD8607N INRP INLP MODULATOR MODULATOR INRM INLM – – REFI REFO AVDD LVSS AVSS LVDD DECIMATION DECIMATION AVSS(LF) FILTER FILTER VOLTAGE REFERENCE LOW CUT LOW CUT TEST1 VSS1(LF)
  • Page 62 IC431 LA5632 – STBY ANA5 – SYS3.3 – – 3.3V B.BAK – DELAY P. DOWN CIRCUIT – DELAY S. RESET CIRCUIT VREF IC471 LB1641 DRIVER INPUT LOGIC BLOCK OUT1 OUT2 – 71 –...
  • Page 63: Ic Pin Functions

    6-12. IC PIN FUNCTIONS • IC101 RF Amplifier (CXA2523R) Pin No. Pin Name Function I-V converted RF signal I input I-V converted RF signal J input Middle point voltage (+1.5V) generation output 4 to 9 A to F Signal input from the optical pick-up detector Light amount monitor input Laser APC output APCREF...
  • Page 64 • IC121 Digital Signal Processor, Digital Servo Signal Processor, EFM/ACIRC Encoder/Decoder, Shock-proof Memory Controller, ATRAC Encoder/Decoder, 2M Bit DRAM (CXD2654R) Pin No. Pin Name Function FOK signal output to the system control (monitor output) MNT0 (FOK) “H” is output when focus is on MNT1 (SHCK) Track jump detection signal output to the system control (monitor output) MNT2 (XBUSY)
  • Page 65 Pin No. Pin Name Function Data input/output for DRAM 50, 51 D2, D3 MVCI I (S) Clock input from an external VCO (Fixed at “L”) ASYO Playback EFM duplex signal output ASYI I (A) Playback EFM comparator slice level input AVDD —...
  • Page 66 Pin No. Pin Name Function Tracking servo drive PWM output (+) TFDR — +3V power supply (Digital) DVDD Focus servo drive PWM output (+) FFDR Focus servo drive PWM output (–) FRDR 176.4 kHz clock signal output (X’tal) (Not used) Sled servo drive PWM output (–) SRDR Sled servo drive PWM output (+)
  • Page 67 • IC307 A/D, D/A converter (CXD8607N) Pin No. Pin Name Function INRP Rch analog (+) input INRM Rch analog (–) input REFI A/D reference voltage input (+3.2V) — +5V power supply (A/D, analog) — AVss Ground (A/D, analog) A/D analog block power down “L”: Power down —...
  • Page 68 Pin No. Pin Name Function Lch PLM output 1 — +5V power supply (D/A, digital) — +5V power supply (A/D, digital) — — Ground (A/D, digital) TEST2 Test pin (Fixed at “L”) TEST3 — Ground (A/D, digital) SS1 (LF) — Not used —...
  • Page 69 • IC501 System Control (M30610MCA-251FP) Pin No. Pin Name Function Not used (Fixed at “L”) 1, 2 C1 error rate voltage output (Fixed at “L”) C1ER AD error rate voltage output (Fixed at “L”) ADER ADIP sync or subcode Q sync input from CXD2654R SQSY Remote controls Not used (Fixed at “L”)
  • Page 70 Pin No. Pin Name Function Not used (Fixed at “L”) — Ground Data signal input/output pin with the backup memory MNT3 (SLOCK) In the state of spindle srvo lock from the CXD2564R WR PWR Write power ON/OFF output Recording-protection claw detection input from the protection detection switch PROTECT Protect: “H”...
  • Page 71: Exploded Views

    SECTION 7 EXPLODED VIEWS NOTE: The components identified by • The mechanical parts with no reference number in • -XX, -X mean standardized parts, so they may have mark ! or dotted line with mark the exploded views are not supplied. some difference from the original one.
  • Page 72: Front Panel Section

    7-2. FRONT PANEL SECTION not supplied FL781 Supplied Supplied with RV791 with J791 not supplied not supplied 61 73 (AEP,UK,E,SP,HK,AUS) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-4949-367-1 PANEL ASSY, FRONT (US,CND) * 64 1-668-240-11 HP BOARD X-4949-609-1 PANEL ASSY, FRONT (BLACK)(EXCEPT US,CND) X-4949-610-1 PANEL ASSY, FRONT (SILVER)(EXCEPT US,CND) 3-917-216-02 KNOB (TIMER)(SILVER)
  • Page 73: Mechanism Section (Mdm-5A)

    7-3. MECHANISM SECTION (MDM-5A) M103 MBU-5A Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201 1-668-111-11 SW BOARD 4-996-227-01 LEVER (HEAD) * 202 4-996-217-01 CHASSIS 4-996-223-01 INSULATOR (F)(BLACK) 4-996-229-01 SPRING (HEAD LEVER), TORSION * 204 4-996-218-01 BRACKET (GUIDE R) 4-996-212-01 LEVER (LIMITTER) 4-996-277-01 SPRING (O/C), TENSION...
  • Page 74: Base Unit Section (Mbu-5A)

    7-4. BASE UNIT SECTION (MBU-5A) HR901 not supplied not supplied M101 S102 M102 Les composants identifiés par une The components identified by mark ! or dotted line with mark marque ! sont critiques pour la ! are critical for safety. sécurité.
  • Page 75: Electrical Parts List

    SECTION 8 ELECTRICAL PARTS LIST Note: • SEMICONDUCTORS • Due to standardization, replacements in the parts list The components identified by In each case, u: µ , for example: may be different from the parts specified in the mark ! or dotted line with mark diagrams or the components used on the set.
  • Page 76 DISPLAY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark L121 1-414-813-11 INDUCTOR R151 1-216-073-00 METAL CHIP 1/10W L122 1-414-813-11 INDUCTOR R152 1-216-073-00 METAL CHIP 1/10W L151 1-412-029-11 INDUCTOR CHIP 10uH R158 1-216-097-91 RES,CHIP 100K 1/10W L152 1-412-029-11 INDUCTOR CHIP 10uH R159 1-216-097-91 RES,CHIP...
  • Page 77 DISPLAY KEY SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C776 1-162-294-31 CERAMIC 0.001uF < CONNECTOR > C781 1-162-294-31 CERAMIC 0.001uF C783 1-162-294-31 CERAMIC 0.001uF * CN791 1-506-468-11 PIN, CONNECTOR 3P < CONNECTOR > < JACK > CN750 1-695-994-11 HOUSING, CONNECTOR 5P J791...
  • Page 78 KEY SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark S713 1-475-543-11 ENCODER, ROTARY (AMS (PUSH ENTER)) C339 1-164-159-11 CERAMIC 0.1uF S714 1-762-875-21 SWITCH, KEYBOARD (CLEAR) C341 1-162-207-31 CERAMIC 22PF C342 1-162-205-31 CERAMIC 18PF S741 1-771-047-11 SWITCH, SLIDE (INPUT) C349 1-162-282-31 CERAMIC...
  • Page 79 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C622 1-162-306-11 CERAMIC 0.01uF J101 1-784-430-11 JACK, PIN 4P (LINE (ANALOG))(US,CND) (US,CND) J631 1-784-431-11 JACK, PIN 1P (COAXIAL IN) C623 1-126-963-11 ELECT 4.7uF (AEP,UK,E,SP,HK,AUS) (US,CND) C631 1-164-159-11 CERAMIC 0.1uF <...
  • Page 80 MAIN POWER SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R211 1-249-431-11 CARBON 1/4W F R549 1-249-429-11 CARBON 1/4W R212 1-249-432-11 CARBON 1/4W F R213 1-249-437-11 CARBON 1/4W F R550 1-249-429-11 CARBON 1/4W R551 1-249-429-11 CARBON 1/4W R214 1-249-437-11 CARBON...
  • Page 81 MDS-JE520 POWER SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > ACCESSORIES & PACKING MATERIALS ******************************* R752 1-249-429-11 CARBON 1/4W R756 1-249-409-11 CARBON 1/4W F 1-475-586-11 REMOTE COMMANDER (RM-D15M) 1-558-271-11 CORD, CONNECTION (AUDIO 108cm) <...

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