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Sony MDS-PC1 Service Manual

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SERVICE MANUAL
MICROFILM
MDS-PC1
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Type
SPECIFICATIONS
– 1 –
US Model
AEP Model
UK Model
E Model
MDS-S38
MDM-3B
KMS-260A/J1N
— Continued on next page —
MINIDISC DECK
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Summary of Contents for Sony MDS-PC1

  • Page 1 MDS-PC1 SERVICE MANUAL US Model AEP Model UK Model E Model Model Name Using Similar Mechanism MDS-S38 MD Mechanism Type MDM-3B 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 users 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 users, 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 total rec Displays the recording time in the form of “rππππππh”. The displayed time is the total number of hours the laser is high power, which is about one-fourth of the actual recording time.
  • Page 4 WITH MARK ! 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. – 4 –...

  • 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 BD BOARD WAVEFORM CHECK TOOL Use the jig (J-2501-124-A or J-2501-149-A) to facilitate the checking of the waveform of the BD board. The names and check items of each terminal are as follows. I+3V : For measuring the IOP (check if the optical pick-up laser has weakened) IOP : For measuring IOP (check if the optical pick-up laser has weakened) TEO : TRK error signal (traverse adjustment) : Reference level for checking signals...
  • Page 7 RETRY CAUSE DISPLAY MODE * In this test mode, the causes for retry of the unit during recording and stop can be displayed on the fluorescent display 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 8 Reading the Display: Convert the hexadecimal display into the binary display. If more than two causes, they will be added. Example When 44 is displayed: Upper bit : 4=0100 n b6 Lower bit : 4=0010 n b2 In this case, the retry cause is combined of “CVL unlock” and “ader5”. When A4 is displayed: Upper bit : A=1010 n b7+b5 Lower bit : 4=0010 n b2...

  • Page 9: General

    SECTION 2 GENERAL Front Panel Location of Parts and Controls 1 STANDBY lamp 12 CONTROL A1 jack 2 1/u (Power) switch 13 DISPLAY/CHAR button 3 Remote sensor 14 PLAY MODE button 4 DISK compartment 15 DISPLAY window 5 § button 16 0/) button 6 ·P button 17 EDIT/NO button...
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  • Page 29: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 3-1. FRONT PANEL 2 Connector 3 Connector (CN403) (CN800) 7 Front panel assembly 1 Flat type wire (23core) 4 Lead (With connector) 6 Three claws 5 Four screws (BVTP3x10) –...

  • Page 30: Back Panel And Main Board

    3-2. BACK PANEL AND MAIN BOARD !£ Back panel !™ Four screws (BVTP3x10) !¢ Main board 8 Two screws (BVTP3x10) 2 Connector (CN301) !º Three screws (BVTP3x10) 4 Two screws (PTTWH3x6) 3 Two screws (PTTWH3x6) 7 Flat type wire 1 Connector (CN306) (29core) 6 Flat type wire (19core)

  • Page 31: Bracket (T)/(L)/(R)

    3-3. BRACKET (T)/(L)/(R) 1 Four screws 4 Screw 2 Bracket (T) (BVTT2x3) (BVTT2x3) 3 Screw (BVTT2x3) 6 Two screws (BVTT2x3) 5 Bracket (joint) 7 Bracket (L) 8 Two screws 9 Bracket (R) (BVTT2x3) 3-4. SUB CHASSIS 1 Two step screws 2 Two step screws 3 Two insulators 4 Two insulators...

  • Page 32: Shutter Assembly

    3-5. SHUTTER ASSEMBLY 1 Stopper washer 2 Shaft (shutter) Shutter assembly 3 Shutter assembly Shaft (lid) Shaft (shutter) Hole B Hole A When installing, install the shaft (shutter) into the hole A as shown in the figure before installing the shaft (lid) into the hole B.

  • Page 33: Slider Complete Assembly

    3-6. SLIDER COMPLETE ASSEMBLY 3 Set the shaft of Gear (LA) to be at the position in the figure. claw claw 45˚ 4 Remove the slider complete assembly 1 Screw in the direction of arrow with putting (M1.7x2) 2 Retainer (gear) out of two claws.

  • Page 34: Test Mode

    SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE (1) 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 §...
  • Page 35 4-5. SELECTING THE TEST MODE There are altogether 23 test modes, shown in the following table. Rotating the AMS dial to the right switches to the mode below the current mode in the table while rotating to the left switches to the mode above. Each time the EDIT/NO button is pressed, the display changes in the following order;...
  • Page 36 4-5-2. Operating the Continuous Recording Mode 1. Entering the continuous recording mode 1 Set a recordable disc in the unit. (Refer to Note 3.) 2 Rotate the AMS dial and display “CREC MODE”. 3 Press the YES button to change the display to “CREC MID”. 4 When access completes, the display changes to “CREC ( )”...
  • Page 37 4-7. DISPLAYS DURING TEST MODE The display changes according to the following sequence each time the DISPLAY/CHAR button is pressed. 1. Mode display “TEMP ADJUST” and “CPLAYMODE” are displayed. Mode display 2. Error rate display The error rate is displayed as follows. Error rate display C1=ππππ...

  • Page 38: Electrical Adjustments

    SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. PRECAUTIONS FOR CHECKING LASER DIODE 5-3. PRECAUTIONS FOR ADJUSTMENTS EMISSION 1) When replacing the following parts, perform adjustments and When checking the emission of the laser diode during adjustments, checks marked ¬ in the order shown in the following table. never view directly from the top as this may cause blindness.
  • Page 39 5-5. TEMPERATURE COMPENSATION OFFSET 2. Rotate the AMS knob to display “LDPWR ADJUST”. (Laser power:For adjustment) ADJUSTMENT 3. Press the YES button once to display “LD 0.9mW $@@”. Save the current temperature data in the non-volatile memory as 4. Rotate the AMS knob so that the laser power meter reads 0.86 the 25 °C standard data.
  • Page 40 5-5. TEMPERATURE COMPENSATION OFFSET 2. Rotate the AMS knob to display “LDPWR ADJUST”. (Laser power:For adjustment) ADJUSTMENT 3. Press the YES button once to display “LD 0.9mW $@@”. Save the current temperature data in the non-volatile memory as 4. Rotate the AMS knob so that the laser power meter reads 0.86 the 25 °C standard data.
  • Page 41 5-8. FOCUS BIAS ADJUSTMENT 5-9. ERROR RATE CHECK Adjusting method: 5-9-1. CD ERROR RATE CHECK 1. Load a continuously recorded disc (Refer to “5-4. Creating the Checking Procedure: Continuously Recorded Disc”.) 1. Load a check disc (MD) TDYS-1. 2. Rotate the AMS knob to display “CPLAY MODE”. 2.
  • Page 42 5-11. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (SIDE A) CN110 NOTE I+3V CN101 D101 IC192 [BD BOARD] (SIDE B) IC171 IC101 IC121 NOTE:It is useful to use the jig. for checking the waveform. (Refer to Servicing Note on page 6.) –...

  • Page 43: Diagrams

    SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION TRANS board BACK UP board VOLTAGE SELECTOR board SW board MAIN board PANEL board ROTARY ENCODER (S701) BD board VOLUME board – 43 –...

  • Page 44: Block Diagrams

    MDS-PC1 6-2. BLOCK DIAGRAMS DIGITAL SERVO SIGNAL PROCESSOR, DIGITAL SIGNAL PROCESSOR OVER WRITE HEAD DRIVE EFM/ACIRC ENCODER/DECODER, SHOCK-PROOF MEMORY CONTROLLER, – BD SECTION – IC181 ATRAC ENCODER/DECODER, 2M-BIT DRAM IC121 SCTX XINT Q180 HR901 • SIGNAL PATH OVER WRITE HEAD...

  • Page 45: Main Section

    MDS-PC1 DIGITAL INPUT SELECTOR BUFFER IC315 IC314 (1/2) – MAIN SECTION – A/D, D/A CONVERTER IC201 RV702 REC LEVEL INLM INLP IC353 INRP CONVERTER DIGITAL DIGITAL INRM R-ch R-ch 10 11 1 IC352 DOUT X201 J101 FRONT-END LRCK 22MHz IC101...
  • Page 46 WAVEFORMS THIS NOTE IS COMMON FOR PRINTED WIRING – BD SECTION – – MAIN SECTION – – PANEL SECTION – BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) 0.46Vp-p For schematic diagrams. 3.4Vp-p 3.7Vp-p Note:...

  • Page 47: Schematic Diagram - Bd (1/2) Section

    MDS-PC1 6-3. SCHEMATIC DIAGRAM – BD (1/2) SECTION – • See page 50 for Waveforms. • See page 55 for Printed Wiring Board. • See page 71 for IC Block Diagrams. • See page 76 for IC Pin Functions. (Page 53) (Page 54) –...

  • Page 48: Schematic Diagram - Bd (2/2) Section

    MDS-PC1 6-4. SCHEMATIC DIAGRAM – BD (2/2) SECTION – • See page 50 for Waveforms. • See page 55 for Printed Wiring Board. • See page 72 for IC Block Diagrams. • See page 77 for IC Pin Functions. (Page 51)

  • Page 49: Printed Wiring Board - Bd Section

    MDS-PC1 6-5. PRINTED WIRING BOARD – BD SECTION – • See page 43 for Circuit Boards Location. • Semiconductor Location Ref. No. Location D101 D181 D183 IC101 F-14 IC103 B-15 IC121 D-12 IC122 IC123 E-10 (Page 57) IC124 F-12 IC152...

  • Page 50: Printed Wiring Board - Sw Section

    MDS-PC1 6-6. PRINTED WIRING BOARD – SW SECTION – 6-7. SCHEMATIC DIAGRAM – SW SECTION – • See page 43 for Circuit Boards Location. (Page 55) (Page 53) – 57 – – 58 –...

  • Page 51: Printed Wiring Board - Main Section

    MDS-PC1 6-8. PRINTED WIRING BOARD – MAIN SECTION – • See page 43 for Circuit Boards Location. (Page 67) (Page 67) : US : AEP, UK, SP (Page 56) (Page 56) • Semiconductor Location Ref. No. Location Ref. No. Location...

  • Page 52: Schematic Diagram - Main (1/3) Section

    MDS-PC1 6-9. SCHEMATIC DIAGRAM – MAIN (1/3) SECTION – • See page 50 for Waveforms. • See page 82 for IC Pin Functions. (Page 69) (Page 53) (Page 63) (Page 65) (Page 65) – 61 – – 62 –...

  • Page 53: Schematic Diagram - Main (2/3) Section

    MDS-PC1 6-10. SCHEMATIC DIAGRAM – MAIN (2/3) SECTION – • See page 50 for Waveforms. • See page 59 for Printed Wiring Board. • See page 73 for IC Block Diagrams. • See page 80 for IC Pin Functions. (Page 69)

  • Page 54: Schematic Diagram - Main (3/3) Section

    MDS-PC1 6-11. SCHEMATIC DIAGRAM – MAIN (3/3) SECTION – • See page 50 for Waveforms. • See page 59 for Printed Wiring Board. • See page 75 for IC Block Diagrams. (Page 63) (Page 64) (Page 61) (Page 62) (Page 53) (Page 70) –...

  • Page 55: Printed Wiring Board - Panel Section

    MDS-PC1 6-12. PRINTED WIRING BOARD – PANEL SECTION – • See page 43 for Circuit Boards Location. (Page 59) (Page 60) • Semiconductor Location Ref. No. Location D701 D750 IC701 IC702 Q701 (Page 59) – 67 – – 68 –...

  • Page 56: Schematic Diagram - Panel Section

    MDS-PC1 6-13. SCHEMATIC DIAGRAM – PANEL SECTION – • See page 50 for Waveforms. (Page 65) (Page 64) (Page 62) – 69 – – 70 –...

  • Page 57: Ic Block Diagrams

    6-14. IC BLOCK DIAGRAMS IC121 CXD2652AR • BD section IC101 CXA2523AR 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 75 AUX2 SPINDLE GENERATOR SERVO 74 TE MNT0...
  • Page 58 IC171 BR24C01AF 1024 BIT EEPROM ARRAY 8BIT 7BIT ADDRESS SLAVE WORD DATA TEST 7BIT DECODER ADDRESS RESISTOR RESISTOR START STOP CONTROL CIRCUIT HIGH VOLTAGE VOLTAGE GENERATION CIRCUIT IC192 L88MS33T-TL START UP REFERENCE ERROR CIRCUIT VOLTAGE ON/OFF CURRENT PROTECTOR CONTROL LIMITER VOUT •...
  • Page 59 IC308 M5218AL IC310 M5293L REFERENCE VOLTAGE REFERENCE ON/OFF – VOLTAGE OVERHEAT OVERCURRENT PROTECTION LIMITTER IC311 LB1641 DRIVER INPUT LOGIC BLOCK OUT1 OUT2 – 74 –...
  • Page 60 IC501 LA5620 – STBY ANA5 – SYS3.3 – – 3.3V BACK – DELAY CIRCUIT P. DOWN – DELAY CIRCUIT VREF S. RESET IC502 M62016L INTERRUPT SIGNAL – GENERATING BLOCK RESET SIGNAL – GENERATING BLOCK RESET – 75 –...

  • Page 61: Ic Pin Functions

    6-15. IC PIN FUNCTIONS • IC101 RF Amplifier (CXA2523R) (BD Board) 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...
  • Page 62 • IC121 Digital Signal Processor, Digital Servo Signal Processor, EFM/ACIRC Encoder/Decoder, Shock-proof Memory Controller, ATRAC Encoder/Decoder, 2M Bit DRAM (CXD2652AR) (BD Board) Pin No. Pin Name Function FOK signal output to the system control MNT0 (FOK) “H” is output when focus is on MNT1 (SHCK) Track jump detection signal output to the system control MNT2 (XBUSY)
  • Page 63 Pin No. Pin Name Function Data input/output for DRAM 48, 49 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 64 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 65 • IC201 A/D, D/A converter (CXD8607N) (MAIN Board) 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 66 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 67 • IC401 System Control (M30610MCA-261FP) (MAIN Board) Pin No. Pin Name Function 1, 2 Not used (DAOUT0) (DAOUT1) ADIP sync or subcode Q sync input from CXD2652AR SQSY Remote controls REMOCON Signal input from CONTROL A1 CONTROL A1 IN Not used BYTE —...
  • Page 68 Pin No. Pin Name Function Not used — Ground SENS Internal status (SENSE) input from the CXD2652AR NMT1 (SHOCK) Track jump signal input from the CXD2652AR DIG-RST Digital rest signal output to the CXD2652AR and motor driver Reset: “L” MNT2 (XBUSY) In the state of executive command from the CXD2652AR LDON Laser ON/OFF control output “H”: Laser ON...

  • Page 69: Exploded Views

    Ref. No. Part No. Description Remark X-4950-175-1 PANEL ASSY, FRONT A-4724-509-A PANEL BOARD, COMPLETE (US) 4-962-708-01 EMBLEM (4-A), SONY 1-782-265-11 WIRE (FLAT TYPE) (23 CORE) 4-996-311-01 KNOB (REC) 3-363-099-11 SCREW (CASE 3 TP2) 1-668-216-11 VOLUME BOARD * 12 4-985-899-91 CASE 4-951-620-01 SCREW (2.6X8), +BVTP...

  • Page 70: Chassis Section

    7-2. CHASSIS SECTION (US) not supplied (UK) (SP) TR001 (AEP,SP) not supplied MDM-3B not supplied The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref.

  • Page 71: Mechanism Deck Section 1 (Mdm-3B)

    7-3. MECHANISM DECK SECTION 1 (MDM-3B) not supplied not supplied not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-628-167-01 SCREW, STEP 1-660-966-11 PC BOARD, OP RALAY FLEXIBLE 4-987-327-01 INSULATOR * 207 A-4699-770-A BD BOARD, COMPLETE 4-986-959-01 WASHER, STOPPER 1-777-517-11 WIRE (FLAT TYPE) (15 CORE)

  • Page 72: Mechanism Deck Section 2 (Mdm-3B)

    7-4. MECHANISM DECK SECTION 2 (MDM-3B) not supplied not supplied M901 M902 M903 HR901 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref.

  • Page 73: Electrical Parts List

    SECTION 8 BACK UP ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the parts list • SEMICONDUCTORS 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 uA...: µ...
  • Page 74 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC103 8-729-903-10 IC TRANSISTOR FMW1 R132 1-216-097-91 RES,CHIP 100K 1/10W IC121 8-752-384-47 IC CXD2652AR R133 1-216-117-00 METAL CHIP 680K 1/10W IC122 8-759-234-20 IC TC7S08F R134 1-216-049-91 RES,CHIP 1/10W IC123 8-759-242-70 IC TC7WU04F R135...
  • Page 75 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4724-287-A MAIN BOARD, COMPLETE (AEP,UK) C255 1-162-600-11 CERAMIC 0.0047uF 20% C256 1-162-600-11 CERAMIC 0.0047uF 20% ******************** C311 1-162-306-11 CERAMIC 0.01uF A-4724-508-A MAIN BOARD, COMPLETE (US) C312 1-162-306-11 CERAMIC 0.01uF ******************** C332...
  • Page 76 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C805 1-162-306-11 CERAMIC 0.01uF < JACK > C806 1-164-159-11 CERAMIC 0.1uF J101 1-770-720-11 JACK, PIN 4P (LINE (ANALOG) IN, OUT)) C807 1-162-306-11 CERAMIC 0.01uF J401 1-779-655-21 JACK (SMALL TYPE)(2 GANG) C808 1-162-306-11 CERAMIC 0.01uF...
  • Page 77 MAIN PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R131 1-249-429-11 CARBON 1/4W R420 1-249-441-11 CARBON 100K 1/4W R431 1-249-429-11 CARBON 1/4W R132 1-249-429-11 CARBON 1/4W R432 1-249-429-11 CARBON 1/4W R134 1-249-441-11 CARBON 100K 1/4W R433 1-249-429-11 CARBON 1/4W...
  • Page 78 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C373 1-162-294-31 CERAMIC 0.001uF R717 1-249-429-11 CARBON 1/4W C702 1-164-159-11 CERAMIC 0.1uF R721 1-247-807-31 CARBON 1/4W C703 1-162-294-31 CERAMIC 0.001uF R722 1-247-807-31 CARBON 1/4W C704 1-162-294-31 CERAMIC 0.001uF R723 1-247-807-31 CARBON...
  • Page 79 MDS-PC1 TRANS VOLTAGE SELECTOR VOLUME Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-668-217-11 TRANS BOARD ! 58 1-558-945-21 CORD, POWER (POLAR, SPT-1) (US) ************ ! 58 1-696-586-21 CORD, POWER (UK) 1-775-377-21 LEAD (WITH CONNECTOR)(US,AEP,UK) ! 58...

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