MDS-PC3 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model Photo: SILVER US and foreign patents licensed form Dolby Laboratories Licensing Corporation.
*Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode.” Press the z button, AMS knob to switch the functions. • Each time the z button is pressed, the display switches in the follwing order, “PGM” t “blank” t “PGM” t –. • Rotate the AMS knob and the display switches in the following order, “blank” t “TOC” t “EDIT” t “TOC EDIT” t “[ ]” t “[TOC ]” t “[ EDIT]” t “[TOC EDIT]” t “blank” t – –. For simplicity, operations of z button will not be discribed here.
1. While pressing the AMS knob and x/Z button, connect the power plug to the outlet, and release the AMS knob and x/Z button. When the test mode is set, “[Check]” will be displayed. 2. Rotate the AMS knob and when “[Service]” is displayed, press the @/1 button. 3. Rotate the AMS knob and display “Err Display”. 4. Pressing the @/1 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.
Table of Error Codes Error Code TABLE OF CONTENTS Description 10 Could not load 12 Loading switches combined incorrectly 20 Timed out without reading the top of PTOC 21 Could read top of PTOC, but detected error 22 Timed out without accessing UTOC 23 Timed out without reading UTOC 24 Error in UTOC 30 Could not start playback 31 Error in sector 40 Retry cause generated during normal recording 41 Retried in DRAM overflow 42 Retry occurred during TOC writing 43 Retry aborted during S
SECTION 1 SERVICE NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode 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 is included in the repair parts. The flexible board is easily damaged and should be handled with care.
JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-196-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.
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record the Iop value on the optical pick-up according to the following procedure. Record Precedure: 1.
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”. • 5-6-2. Laser power check (see page 27) • 5-6-3. Iop Compare (see page 27) • 5-6-4. Auto Check (see page 28) Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
RETRY CAUSE DISPLAY MODE • In this test mode, the causes for retry of the unit during recording can be displayed on the indication vessel. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit. • The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright.
Reading the Track Mode Display Higher Bits Hexadecimal 8 Bit Binary 4 2 1 Lower Bits 8 4 2 1 b7 b6 b5 b4 b3 b2 b1 b0 Details Hexadecimal When 0 When 1 0 0 0 0 0 0 0 1 01 Emphasis OFF Emphasis ON 0 0 0 0 0 0 1 0 02 Monaural Stereo 0 0 0 0 0 1 0 0 04 This is 2-bit display. Normally 01. 0 0 0 0 1 0 0 0 08 01:Normal audio.
M m AyB DISPLAY PLAY MODE `/1 CLEAR YES – 6 3 4 5 2 1 Press to cancel the selection. Press to select one of the following four recording modes: Mono (monaural recording), stereo (stereo recording), LP2 (2 times normal recording time), and LP4 (4 times normal recording time). qh REC MODE button (15) Press to select the input jack (or connector) of the program source to be recorded. qg INPUT button (12) Press to eject the MD.
* The display appears only when “PGM” appears. Track2 Track name Press 12t4t61 Press SONGS -45.25 Remaining recordable time on the MD Press Order of the programmed tracks* Press Press 1 Tr - 2 . 5 1 Track number and remaining time of the current track Track name Level of the input signal -63.02 Remaining recordable time on the MD Press 1 Tr 0 . 1 2 1 5 Tr 4 4 .
LINE IN IN DIGITAL ! For AC power adaptor DC IN 9V Amplifier, etc. with optical digital connection capability OPTICAL IN PC LINK Use the PCLK-MN10 PC connecting kit (supplied) to connect the PC to the MD deck through the PC LINK jack on the back of the MD deck. By connecting the MD deck to a PC, you will be able to select and play MD tracks and do various editing operations on the PC screen. For more details, refer to the manual supplied with the PC connecting kit.
SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. CASE (U) 4 case (U) 2 3 claws 1 three screws (BVTP 3x10) 1 three screws (BVTP 3x10) 3-2.
3-3. MAIN BOARD 2 two screws (BVTP 3x8) 1 flat type wire (13 core) (CN103) 4 MAIN board 3 three screws (BVTP 3x8) 3-4. OVER LIGHT HEAD (HR901), BD (MD) BOARD 2 screw (P 1.
3-5. HOLDER ASSY 3 6 holder assy 5 4 boss 4 boss 1 spring (holder), tension 3-6. LOADING MOTOR ASSY (M103) 1 belt (loading) 2 two screws (PWH 1.7x2.
3-7. SLED MOTOR ASSY (M102), SLIDER Remeve the claw. Shift the slider in the arrow A direction. 3 4 slider (EJ) 5 A 8 lever (head) 6 slider 2 guide (L) 1 two screws (BTP 2x6) 9 two screws (PWH 1.7x2.5) 7 lever (CHG) 0 motor assy, sled (M102) 3-8. OPTICAL PICK-UP (MD) (KMS-260B/JIN) qa optical pick-up (KMS-260B/J1N) 7 MAIN shaft 1 FLEXBLE boaed 0 slider (SL) 9 screw (P 1.7x6) 8 6 two screws (K 2x6) 4 screw (BTP 2x6) 5 base (BU-A) 3 gear (SD) 2 screw (M 1.
3-9. SPINDLE MOTOR ASSY (M101) 2 motor assy, spindle (M101) 1 screw (M 1.
SECTION 4 TEST MODE *Note: As this unit has only a few buttons, one button is assigned with several functions in the test mode.” Press the z button, AMS knob to switch the functions. • Each time the z button is pressed, the display switches in the follwing order, “PGM” t “blank” t “PGM” t –. • Rotate the AMS knob and the display switches in the following order, “blank” t “TOC” t “EDIT” t “TOC EDIT” t “[ ]” t “[TOC ]” t “[ EDIT]” t “[TOC EDIT]” t “blank” t – –.
4-5. SELECTING THE TEST MODE There are 26 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 @/1 button. After setting a certain group, rotating the AMS knob switches between these modes. Refer to “Group” in the table for details selected. All adjustments and checks during servicing can be performed in the test mode in the Service group. NOTE: Do not use the test mode in the [Develop] group.
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 “CPLAY1MODE”(C34). 3 Press the @/1 button to change the display to “CPLAY1 MID”. 4 When access completes, the display changes to “C = AD = )”. Note : The numbers “ ” displayed show you error rates and ADER. 2.
4-6. FUNCTIONS OF OTHER BUTTONS Function PLAY STOP 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. FF The sled moves to the outer circumference only when this is pressed. FR The sled moves to the inner circumference only when this is pressed. SCROLL PLAYMODE DISPLAY x/Z “PGM” x/Z REPEAT REC CLEAR TIME Switches between the pit and groove modes when pressed.
4-8. MEANINGS OF OTHER DISPLAYS Contents Display When Lit When Off B Servo ON Servo OFF X Tracking servo OFF Tracking servo ON REC z Recording mode ON Recording mode OFF LP CLV low speed mode CLV normal mode L.SYNC ATT ABCD adjustment completed Tracking offset cancel ON Tracking offset cancel OFF B Tracking auto gain OK A- Focus auto gain OK 4 Pit Groove 2 High reflection Low reflection SHUF CLV S CLV A MONO CLV LOCK CLV UNLOCK 4-9.
SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. PARTS REPLACEMENT AND ADJUSTMENT If malfunctions caused by optical pick-up such as sound skipping are suspected, follow the following check. Check before replacement Start 5-6-2. Laser Power Check (See page 27) NG OK 5-6-3. Iop Compare (See page 27) NG OK 5-6-4. Auto Check (See page 28) OK Other faults are suspected. Check the threading mechanism, etc.
Adjustment flow • Abbreviation OP: optical pick-up Start Replace IC195 YES After turning off and then on the power, initialize the EEPROM For details, refer to 4-11. WHEN MEMORY NG IS DISPLAYED (See page 23) NO Replace OP or IO195 YES 5-7. INITIAL SETTING OF ADJUSTMENT VALUE (See page 30) YES 5-9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 30) NO Replace IC101, IC195, or D101 NO Replace OP, IC190, or IC195 YES 5-10.
5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight. 5-3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (KMS-260B) As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder.
5-5. USING THE CONTINUOUSLY RECORDED DISC * This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. 2. Rotate the AMS knob and display “CREC 1MODE” (C35). 3. Press the @/1 button again to display “CREC1 MID”. Display “CREC (0300)” and start to recording. 4. Complete recording within 5 minutes. 5. Press the x/Z button and stop recording . 6.
5-6-4. Auto Check This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare. Procedure 1. Press the @/1 button. If “LDPWR minicheck” is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2.
15. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. (Traverse Waveform) A VC B Specified value : Below 10% offset value Offset value (%) = IA – BI X 100 2 (A + B) 16. Press the @/1 button and display “EF CD CHECK” (C15). 17. Press the x/Z “PGM” button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during if a recorded disc is used in this adjustment.
5-7. INITIAL SETTING OF ADJUSTMENT VALUE 5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to “5-4.
7. Then, rotate the AMS knob and display “LDPWR CHECK” (C13). 8. Press the @/1 button once and display “LD 0.9 mW $ ”. Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the @/1 button once more and display “LD 7.0 mW $ ”. Check that the reading the laser power meter and digital volt meter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value : Laser power meter reading : 7.0 ± 0.
10. Rotate the AMS knob until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Traverse Waveform) A VC B Specification A = B 11. Press the @/1 button, and save the adjustment results in the non-volatile memory. (“EFB = SAVE” will be displayed for a moment.) Next “EF MO ADJUS (C07)” is displayed. The disc stops rotating automatically. 12.
5-14. ERROR RATE CHECK 5-14-1. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Rotate the AMS knob and display “CPLAY1MODE” (C34). 3. Press the @/1 button twice and display “CPLAY1 MID”. AD = )”. 4. The display changes to “C = 5. Check that the C1 error rate is below 20. 6. Press the x/Z button, stop playback, press the x/Z “PGM” button, and remove the test disc. 5-14-2. MO Error Rate Check Checking Procedure : 1. Load a continuously recorded test disc (MDW-74/GA-1).
5-17. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (SIDE A) CN101 D101 [BD BOARD] (SIDE B) IC101 CN105 1 IC102 7 * NOTE IC151 IC190 IC195 23 1 27 CN103 1 CN102 NOTE:It is useful to use the jig. for checking the waveform. (Refer to Servicing Note on page 6.
SECTION 6 DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. • • • • • • • • • B C E 1 IC101 ek (RF) 1 IC300 w; (XOUT) 5 IC151 wj (LRCK) These are omitted. B C These are omitted. 22.6µsec 2 IC101 ef (FE) C Q 3.2Vp-p 1.3Vp-p E 2.
MDS-PC3 DIGITAL SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER IC151 (1/2) 60 FILTER SCTX 59 62 61 J 2 54 I RFO RF AMP J 46 40 AGCI RF AGC & EQ AUX 3T PEAK B 57 FILO ASYO DIN0 DIGITAL AUDIO INTERFACE ASYI 20 NC DOUT OPTICAL TRANSCEIVER IC661 21 PEAK & BOTTOM BOTM ADIN ADFG 33 OSCI CLOCK GENERATOR 37 OSCO 36 LD/PD AMP LD SE COMMAND SERIAL/PARALLEL CONVERTER, DECODER V-I CONVERTER F0CNT 26 28 94 93 12 11 14 9 8
MDS-PC3 – MAIN SECTION – A/D, D/A CONVERTER IC500 ADDT A 13 HIGH-PASS FILTER, DIGITAL ATTENUATOR SDTO (Page 36) AINL A/D CONVERTER BLOCK SUBTRACKTION AINR AUDIO INTERFACE CONTROLLER DADT, BCK, LRCK B DADT 14 BCK (Page 36) 12 LRCK SWDT, SCLK D 11 SWDT SCLK AOUTL– DIGITAL ATTENUATOR, SOFT MUTE SDTI BICK D/A CONVERTER BLOCK AOUTR+ AOUTR– LRCK CDTI 15 CCLK 16 CS 17 (Page 36) AOUTL+ CLOCK GENERATOR, CLOCK DIVIDER CONTROL REGISTER INTERFACE XTI 3 CN100 ANALOG IN LINE AMP IC502
MDS-PC3 6-2. PRINTED WIRING BOARD – BD SECTION – • Semiconductor • Semiconductor Location Location Ref. No. Location D101 A-4 Q101 Q131 Q132 Q133 Q134 B-1 C-1 B-1 B-1 C-1 There are a few cases that the part isn’t mounted in model is printed on diagram. 38 38 Ref. No. Location D181 D183 D-3 D-3 IC101 IC102 IC141 IC151 IC153 IC171 A-3 B-3 C-1 C-2 C-3 D-2 Ref. No.
MDS-PC3 6-3. SCHEMATIC DIAGRAM – BD SECTION (1/2) – • See page 35 for Waveforms. • See page 46 for IC Block Diagrams. • See page 49 for IC Pin Functions. • See page 38 for Printed Wiring Board.
MDS-PC3 6-4. SCHEMATIC DIAGRAM – BD SECTION (2/2) – • See page 35 for Waveforms. • See page 46 for IC Block Diagrams. • See page 50 for IC Pin Functions. • See page 38 for Printed Wiring Board.
MDS-PC3 6-5. PRINTED WIRING BOARD – MAIN SECTION – • MAIN and PANEL boards are lead free soldered (contains no lead). • Semiconductor • Semiconductor Location Ref. No. Location Ref. No. Location Location D155 D156 D255 D256 D301 D400 D402 D421 D422 C-4 C-4 C-4 C-4 B-1 A-1 B-3 B-3 B-3 IC440 IC451 IC500 IC501 IC502 IC503 IC550 IC600 IC800 B-1 A-4 C-5 B-5 B-4 C-5 D-5 A-3 A-2 IC300 IC301 IC400 IC401 IC402 IC420 C-2 C-4 B-2 B-1 B-4 C-1 Q100 Q170 Q270 Q400 Q440 Q451 B-1 B-5 B-5 B-3 C-1 C-5 Ref.
MDS-PC3 6-6. SCHEMATIC DIAGRAM – MAIN SECTION (1/2) – • See page 35 for Waveforms. • See page 41 for Printed Wiring Board. • See page 48 for IC Block Diagrams. • See page 53 for IC Pin Functions.
MDS-PC3 6-7. SCHEMATIC DIAGRAM – MAIN SECTION (2/2) – • See page 35 for Waveforms. • See page 41 for Printed Wiring Board. • See page 47 for IC Block Diagrams.
MDS-PC3 6-8. PRINTED WIRING BOARD – PANEL SECTION – • MAIN and PANEL boards are lead free soldered (contains no lead). • Semiconductor Location Ref. No. Location D751 A-6 Q701 Q751 A-6 A-6 • Semiconductor Location Ref. No. Location IC781 A-6 There are a few cases that the part isn’t mounted in model is printed on diagram.
MDS-PC3 6-9. SCHEMATIC DIAGRAM – PANEL SECTION – • See page 35 for Waveforms.
100 99 98 97 96 95 94 93 DCHG APC ADFG F0CNT XLRF CKRF DTRF APCREF LDDR TRDR TFDR DVDD FFDR FRDR FS4 SRDR SFDR SPRD SPFD TEST0 TEST1 TEST2 DVSS EFMO TEST3 IC151 CXD2662R (BD BOARD) 6-10.
IC400 MAX1626ESA-TE2 (MAIN BOARD) IC451 XC6351A120MR (MAIN BOARD) 8 GND 7 EXT 1.
VCC NC NC NC IC420 M62016FP-E1 (MAIN BOARD) 3 4 5 6 R1 + – R2 COM INTERRUPT SIGNAL GENERATOR 8 RESET SIGNAL GENERATOR 1 RESET INT R3 + – R4 COM 2 GND CD 7 IC503 BH3541F-E2 (MAIN BOARD) VCC LOUT BIAS LIN 8 7 6 5 BIAS 180k 0dB 180k 0dB MUTE 1 2 3 4 ROUT MUTE RIN VEE VCC NC NC IC800 P82B715TD.
6-11. IC PIN FUNCTIONS • IC101 CXA2523AR RF Amplifier (BD BOARD) Pin No. Pin Name I/O Function I I I-V converted RF signal I input 2 J I I-V converted RF signal J input 3 VC O Middle point voltage (+1.
• IC151 CXD2662R Digital Signal Processor, Digital Servo Signal Processor (BD BOARD) Pin No.
Pin No.
• IC300 M30805SGP (MAIN BOARD) Pin No.
Pin No. Pin Name I/O I Function 58 SHCK (MNT1) 59 VCC — Power supply (+3.
SECTION 7 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may have some differences from the original one. • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • The mechanical parts with no reference number in the exploded views are not supplied. • Hardware (# mark) list and accessories and packing materials are given in the last of this parts list.
7-2. MECHANISM SECTION-1 (MDM-7A) 312 313 311 314 310 315 309 316 321 305 not supplied 317 304 308 319 303 305 318 306 302 307 320 302 301 Ref. No. Part No. Description * 301 302 303 304 305 4-996-267-01 4-231-319-01 4-227-007-01 4-227-025-01 3-372-761-01 BASE (BU-D) SCREW (2X6) CZN, +B (P) TRI GEAR (SB) BELT (LOADING) SCREW (M1.
7-3. MECHANISM SECTION-2 (MDM-7A) 359 HR901 358 360 356 364 365 369 357 362 369 355 359 362 354 353 366 352 353 S102 352 363 M101 367 368 361 353 M102 353 M103 351 352 Ref. No. Part No. Description 351 352 353 354 355 A-4725-054-A 4-231-319-01 3-372-761-01 4-226-993-01 4-227-014-01 BDBOARD, COMPLETE SCREW (2X6) CZN, +B (P) TRI SCREW (M1.
SECTION 8 ELECTRICAL PARTS LIST NOTE: Ref. No. Part No. Description • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some difference from the original one. • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.
BD Ref. No. IC171 IC181 IC190 IC195 Part No.
BD Ref. No. Part No.
MAIN Ref. No. Part No. Description Remarks C611 C613 1-164-156-11 CERAMIC CHIP 1-162-970-11 CERAMIC CHIP 0.1uF 0.01uF C661 C662 C800 C804 C814 1-164-156-11 1-104-665-11 1-164-156-11 1-164-156-11 1-164-156-11 CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.1uF 100uF 0.1uF 0.1uF 0.1uF C851 C852 C853 C854 C856 1-216-864-11 1-216-864-11 1-216-864-11 1-216-864-11 1-164-156-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP CERAMIC CHIP 0 0 0 0 0.
MAIN Ref. No. Part No. Description R280 R281 R301 R302 R303 1-216-789-11 1-216-821-11 1-216-864-11 1-216-864-11 1-216-864-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 2.
MDS-PC3 PANEL Ref. No. Part No. Description Remarks Ref. No. Part No.
