Page 1
MDS-DRE1 SERVICE MANUAL US Model Canadian Model AEP Model UK Model Model Name Using Similar Mechanism MDS-JA3ES U.S. and foreign patents licensed form Dolby Laboratories Licensing Corporation. MD Mechanism Type MDM-2CR Base Unit Name MBU-2B Optical Pick-up Name KMS-210A/J-N SPECIFICATIONS –...
OPERATION. REPLACE THESE COMPONENTS WITH DE FONCTIONNEMENT. NE REMPLACER CES COM- SONY PARTS WHOSE PART NUMBERS APPEAR AS POSANTS QUE PAR DES PIÈCES SONY DONT LES SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- NUMÉROS SONT DONNÉS DANS CE MANUEL OU LISHED BY SONY.
SECTION 1 SERVICING NOTES SAFETY CHECK-OUT CAUTION After correcting the original service problem, perform the follow- Danger of explosion if battery is incorrectly replaced. ing safety check before releasing the set to the customer: Replace only with the same or equivalent type recommended by Check the antenna terminals, metal trim, “metallized”...
Page 4
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.
Page 5
FORCED RESET The system microprocessor can be reset in the following way. Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. Method 1: Method 2: Set TP (RESET) of the DIGITAL board to ground momentarily. Disconnect the power plug, and short-circuit CN451 of the POWER board with a pair of tweezers, etc.
Page 6
Reading the Retry Cause Display Higher Bits Lower Bits Hexa- Hexadecimal Cause of Retry Occurring conditions decimal b7 b6 b5 b4 b3 b2 b1 b0 Binary shock *1 When more than 3.5 shocks are detected When ADER was counted more than ader5 five times continuously Discontinuous address...
SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. UPPER CABINET SECTION 4 two connectors (CN801, 802) 6 upper cabinet section 4 two connectors (CN701, 751) 3 Open the upper cabinet section in arrow direction. 2 two screws ×...
Page 10
BRACKET (MD) 1 Rotate the pully (BD) in arrow direction A and move the slider assembly in arrow direction B . 2 two screws (B2.6 × 18) 2 two screws (B2.6 × 18) 3 two collars 3 two collars slider assembly 4 insulator (MD) 4 insulator (MD)
Page 11
BASE UNIT AND LOADING MOTOR ASSEMBLY 3 belt 4 two screws (B2.6 × 5) 1 screw (BV3 × 6) 6 loading motor assembly 5 connector (CN192) 2 base unit 1 two screws (BV3 × 6) SLIDER ASSEMBLY MOUNTING 3 Move the slider assembly in arrow direction B , and lock it to the lever (SLM).
SECTION 4 TEST MODE 4-1. Setting the Test Mode [ ] [AMS] Press (POWER) switch while pressing the knob to turn POWER ON. 4-2. Exiting the Test Mode [REPEAT] Press the button. Unplug the power plug from an outlet. 4-3. Basic Operations of the Test Mode [AMS] [ENTER/YES] [EDIT/NO]...
Page 13
4-4-2. Operating the Continuous Recording Mode 1. Entering the continuous recording mode 1 Set the MO disc in the unit. 2 Rotate the [AMS] knob and display “CREC MODE”. 3 Press the [ENTER/YES] button to change the display to “CREC IN”. 4 When access completes, the display changes to “CREC ( ”...
Page 14
4-6. Test Mode Displays [DISPLAY] Each time the button is pressed, the display changes in the following order. MODE display n Error rate display n Address display 1. MODE display Displays “TEMP ADJUS”, “CPLAY MODE”, etc. 2. Error rate display Error rates are displayed as follows.
SECTION 5 ELECTRICAL ADJUSTMENTS Precautions for Checking Laser Diode Emission Precautions for Adjustments To check the emission of the laser diode during adjustments, never 1) When replacing the following parts, perform the adjustments and checks with ® in the order shown in the following table. view directly from the top as this may lose your eye-sight.
Page 16
Laser Power Adjustment Temperature Compensation Offset Adjustment Connection: Save the temperature data at that time in the non-volatile memory as 25 ˚C reference data. Laser power Note: meter 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 ˚C to 28 ˚C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature.
Page 17
[AMS] Traverse Adjustment 11. Rotate the knob until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 3%. Connection: Adjust the waveform so that the specified value is satisfied as Oscilloscope much as possible.
Page 18
Focus Bias Adjustment Error Rate Check CD Error Rate Check Adjusting Method: 1. Load a continuously recorded disc (Refer to “Page 15 Creat- Checking Method: ing Continuously Recorded Disc”). 1. Load a check disc (MD) TDYS-1. [AMS] [AMS] 2. Rotate the knob and display “CPLAY MODE”.
Page 19
Adjusting Points and Connecting Points [BD Board] (Side A) D101 IC191 [BD Board] (Side B) TP58 (IOP) TP57 (I + 5V) IC101 RV101 TP31 (VC) IC171 RV102 TP75 (TEO) IC121 – 19 –...
MDS-DRE1 • Circuit Boards Location 6-5. NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM (In addition to this, the necessary note is printed in each block) Note on Schematic Diagram: Note on Printed Wiring Board: • X : parts extracted from the component side.
MDS-DRE1 6-8. SCHEMATIC DIAGRAM – BD Section (1/2) – • See page 67 for Waveforms. • See page 70 for IC Block Diagrams. (Page 37) The components identified by mark ! or dotted Les composants identifiés par une marque ! sont line with mark ! are critical for safety.
MDS-DRE1 6-23. SCHEMATIC DIAGRAM – POWER Section – • See page 70 for IC Block Diagrams. (Page 62) (Page 54) (Page 61) (Page 50) (Page 57) The components identified by mark ! or dotted Les composants identifiés par une marque ! sont line with mark ! are critical for safety.
– DISPLAY Board – – POWER Board – IC101 M66004M8FP IC401, 411 BA3963 DIG11 MODE1(5V) DIG12 DIGITAL OUTPUT DIG0 DIG15 CIRCUIT MODE2(7V) INDICATION – CONTROLLER SERIAL RECEIVE OVER CIRCUIT DATA CURRENT PROTECT INDICATION RESET OUTPUT CONTROL PORT RESISTOR (2BIT) REF. V CLOCK CODE/COMMAND XOUT...
6-24. IC PIN FUNCTION DESCRIPTION • BD BOARD IC101 CXA1981AR (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin Name Function Middle point voltage (+2.5V) generation output terminal 2 to 7 A to F Signal input from the optical pick-up detector Operational input for the F signal Operational output for the F signal Light amount monitor input from the optical pick-up block laser diode...
Page 53
• BD BOARD IC121 CXD2535CR (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, EFM/ACIRC ENCODER/DECODER Pin No. Pin Name Function FS256 Clock signal (11.2896 MHz) output terminal (MCLK system) Not used (open) Focus OK signal output to the system controller (IC101) “H” is output when focus is on (“L”: NG) DFCT Defect on/off selection signal output terminal Not used SHCK...
Page 54
Pin No. Pin Name Function MCLK MCLK clock signal (22.5792 MHz) output terminal Not used (open) Invert output of the BCK (pin #™) Not used (open) XBCK DVDD0 — Power supply terminal (+5V) (digital system) WDCK Word clock signal (88.2 kHz) output terminal (MCLK system) Not used (open) RFCK Read frame clock signal (7.35 kHz) output terminal (MCLK system) Not used (open) Write frame clock signal (7.35 kHz) output terminal (EFM decoder PLL system when playback...
Page 55
Pin No. Pin Name Function I (A) Tracking error signal input from the CXA1981AR (IC101) AUX2 I (A) Auxiliary signal input terminal Not used (fixed at “L”) DCHG I (A) Connected to the ground I (A) Error signal input for the laser automatic power control Not used (fixed at “L”) TEST1 Input terminal for the test (fixed at “L”) ADIP duplex FM signal (22.05 kHz ±...
Page 56
• CENTER BOARD IC201 M30612M8A-404FP (FLUORESCENT INDICATOR TUBE DRIVE CONTROLLER, KEY CONTROLLER, LED DRIVER) Pin No. Pin Name Function FSW0 Foot switch (PLAY/PAUSE) input terminal FSW1 Foot switch (REC/PAUSE) input terminal 3, 4 — Not used (open) — Not used (fixed at “H”) REM-CON Not used (fixed at “H”) —...
Page 57
Pin No. Pin Name Function LED2-G LED2-O LED3-G LED3-O LED4-G LED4-O LED5-G LED drive signal output of the pad indicator “L”: LED on LED5-O LED6-G LED6-O LED7-G LED7-O LED8-G LED8-O 81 to 86 — Not used (fixed at “H”) INPUT-SEL1 INPUT switch (S601) input terminal “L”: optical input, “H”: analog/coaxial input INPUT-SEL0 INPUT switch (S601) input terminal “L”: analog input, “H”: optical/coaxial input...
Page 58
• DIGITAL BOARD IC101 M30610MC-TTX1057M (SYSTEM CONTROLLER) Pin No. Pin Name Function 1, 2 TEST Not used (pull up) 3, 4 TEST Not used (fixed at “H”) Subcode Q sync (SCOR) input from the CXD2535CR (IC121) SQSY “L” is input every 13.3 msec Almost all, “H” is input —...
Page 59
Pin No. Pin Name Function READY-KEY Ready status input from the CXD2720Q (IC801) XS24-KEY Not used (pull up) RST-37 Reset signal output to the ATRAC encoder (IC501) and ATRAC decoder (IC601) “L”: reset Reset signal output to the CXA1981AR (IC101), CXD2535CR (IC121), MPC17A38VMEL RST-DIG (IC151), A/D, D/A converter (IC301), digital audio interface receiver (IC401), sampling rate converter (IC451, 751) and CXD2720Q (IC801) “L”: reset...
Page 60
Pin No. Pin Name Function Laser power select signal output to the CXD2535CR (IC121) and HF module switch circuit WPOWER “L”: playback mode, “H”: recording mode SDA-CDSP Two-way data bus with the DSP (IC701) SND-CDSP Not used (open) Two-way data bus with the EEPROM (IC171) Serial clock signal output to the EEPROM (IC171) and DSP (IC701) SENSE Internal status monitor input from the CXD2535CR (IC121)
Page 61
• DIGITAL BOARD IC701 DSP56004FJ66 (DSP) Pin No. Pin Name Function GNDA — Ground terminal (for EMI control output buffer) MCS0 Chip select signal output terminal Not used (open) 3 to 5 MA15 to MA13 Address signal output terminal Not used (open) VCCA —...
Page 62
Pin No. Pin Name Function SDI0 Playback serial data input from the CXD2537R (IC601) Debug serial data output terminal Not used (pull up) DSI/OS0 Debug serial data input terminal Not used (fixed at “L”) DSCK/OS1 Debug serial clock signal in/out terminal Not used (fixed at “L”) Debug request signal input terminal Not used (fixed at “H”) 62 to 65 MD7 to MD4...
SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark may have some difference from the original are seldom required for routine service.
Page 64
(2) UPPER SIDE CABINET SECTION supplied supplied with S601 supplied with RV701 supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-210-109-01 BUTTON (EJECT) 4-950-189-51 KNOB (A) (VOL) * 52 A-4724-210-A EJECT BOARD, COMPLETE * 63 A-4724-207-A REC BOARD, COMPLETE X-4950-070-1 BUTTON (PLAY) ASSY...
Page 65
(3) LOWER SIDE CABINET SECTION M801 MDM-2CR supplied T901 supplied supplied supplied The components identified by Les composants identifiés par une mark ! or dotted line with marque ! sont critiques pour la mark ! are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
Page 66
(4) MECHANISM DECK SECTION (MDM-2CR) supplied supplied M191 MBU-2B not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-967-673-01 SPRING, COMPRESSION 4-983-110-01 CUSHION (LVO) 4-967-671-01 INSULATOR (MD) A-4672-071-B HOLDER ASSY, COMPLETE 4-970-710-01 SPRING, COMPRESSION X-4947-136-2 HOLDER ASSY 4-979-400-01 LEVER (DOOR) 4-967-646-01 SPRING (SHT), TORSION...
Page 67
(5) BASE UNIT SECTION (MBU-2B) S102 HR901 M102 M101 The components identified by Les composants identifiés par une mark ! or dotted line with marque ! sont critiques pour la mark ! are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
Page 68
SECTION 8 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
Page 69
CENTER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC121 8-752-378-79 IC CXD2535CR R132 1-216-097-00 RES, CHIP 100K 1/10W IC122 8-759-243-19 IC TC7SU04F R133 1-216-129-00 METAL CHIP 2.2M 1/10W IC151 8-759-179-60 IC MPC17A38VMEL R134 1-216-037-00 METAL CHIP 1/10W IC171 8-759-504-12 IC X24C01S...