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Sony MDS-M9 Service Manual

Mini disc deck
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SERVICE MANUAL
MDS-M9 is the Mini disc deck
section in DHC-MD7.
US and foreign patents licensed from Dolby Laboratories Licensing Corpo-
ration.
MICROFILM
MDS-M9
Model Name Using Similar Mechanism
MD Mechanism Type
Base Unit Type
Optical Pick-up Type
SPECIFICATIONS
— 1 —
US Model
Canadian Model
E Model
Tourist Model
MDS-302
MDM-2B
MBU-2
KMS-210A/J-N
MiNi DiSC DECK

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  • Page 1 MDS-M9 SERVICE MANUAL US Model Canadian Model E Model Tourist Model MDS-M9 is the Mini disc deck section in DHC-MD7. US and foreign patents licensed from Dolby Laboratories Licensing Corpo- Model Name Using Similar Mechanism MDS-302 ration. MD Mechanism Type...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS MODEL IDENTIFICATION — BACK PANEL — 1. SERVICE NOTE ............2. GENERAL ..............Parts No. 3. TEST MODE 3-1. Setting the Test Mode ............11 PARTS No. 3-2. Exiting the Test Mode ............11 US,Canadian model 4-977-679-3π 3-3.
  • Page 3 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 4: Service Note

    If the other units are not available, use a service box (PFJ-1) and jig (J-2501-078-A). In this case, press the p button, r REC button, and DISPLAY button simultaneously to turn on the power. [Connection Diagram] SERVICE BOX (PFJ-1) Unit (MDS-M9) (J-2501-078-A) POWER SW CN101...
  • Page 5 Forced Reset Switch • Parts Location The switch on the power board (S101) is the forced reset switch for [POWER BOARD] — Component side — IC201. Press it for about one second after turning on the power after disassembling and assembling the unit again. CN104 S101 CN102...

  • Page 6: General

    SECTION 2 This section is extracted from instruction manual. GENERAL — 6 —...
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  • Page 11: Test Mode

    SECTION 3 TEST MODE 3-1. Setting the Test Mode Press the STOP (p) button, EDIT/NO (NO) button and REPEAT button at the same time when the POWER of set is turned OFF. (Be sure to release the Three buttons at the same time.) 3-2.

  • Page 12: Operating The Continuous Recording Mode

    3-4-2. Operating the Continuous Recording Mode 1. Entering the continuous recording mode 1 Set the MO disc in the unit. 2 Rotate the SELECTOR knob and display “CREC MODE”. 3 Press the YES button to change the display to “CREC IN”. 4 When access completes, the display changes to “CREC ( )”...

  • Page 13: Test Mode Displays

    3-6. Test Mode Displays Each time the DISPLAY button is pressed, the display changes in the following order. MODE displaynError rate displaynAddress display 1. MODE display Displays “TEMP ADJUST”, “CPLAY MODE”, etc. 2. Error rate display Error rates are displayed as follows. C1 = AD = C1 = : Indicates C1 error...

  • Page 14: Electrical Adjustments

    SECTION 4 ELECTRICAL ADJUSTMENTS 4-1. Precautions for Checking Laser Diode 4-3. Precautions for Adjustments Emission 1) When replacing the following parts, perform the adjustments and checks with ® in the order shown in the following table. To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
  • Page 15 4-5. Temperature Compensation Offset Adjustment 4-6. Laser Power Adjustment Save the temperature data at that time in the non-volatile memory as Connection : 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.

  • Page 16: Traverse Adjustment

    4-7. Traverse Adjustment 11. Rotate the SELECTOR knob until the waveform of the oscilloscope moves closer to the specified value. Connection : Oscilloscope In this adjustment, waveform varies at intervals of approx. 3%. Adjust the waveform so that the specified value is satisfied as much as possible.

  • Page 17: Focus Bias Adjustment

    4-8. Focus Bias Adjustment 4-9. Error Rate Check Adjusting Method : 4-9-1. CD Error Rate Check 1. Load a continuously recorded disc (Refer to “4-4. Creating MO Checking Method : Continuously Recorded Disc”.). 1. Load a test disc TDYS-1. 2. Rotate the SELECTOR knob and display “CPLAY MODE”. 2.

  • Page 18: Adjusting Points And Connecting Points

    4-11. Adjusting Points and Connecting Points [BD BOARD] (Component side) D101 IC191 [BD BOARD] (Conductor side) (IOP) (I + 5V) IC101 RV101 (VC) IC171 RV102 (TEO) IC121 — 18 —...

  • Page 27: Ic Pin Functions

    5-12. IC PIN FUNCTION • IC101 RF Amplifier (CXA1981AR) Pin No. Pin Name Function Middle point voltage (2.5V) generation output pin Input of signal from optical block detector 2 to 7 A to F F operation amplifier input F operation amplifier output Front monitor.

  • Page 28: Ic121 Digital Signal Processor, Digital Servo Processor, Efm/Acirc Encoder/Decoder (Cxd2535Br)

    • IC121 Digital signal processor, digital servo processor, EFM/ACIRC encoder/decoder (CXD2535BR) Pin No. Pin Name Function 11.2896 MHz clock output (MCLK). Not used in this unit (Opened) FS256 Output of FOK signal to system controller (IC201) Outputs “H” when focus is set Outputs defect ON/OFF switching signal to CXD2536R (IC271) DFCT Outputs track jump detection signal to system controller (IC201)
  • Page 29 Pin No. Pin Name Function WFCK clock (7.35 kHz) signal output WFCK (Playback: EFM decoder PLL. Recording: EFM encoder PLL) GTOP “H”: Opens playback EFM frame sync protection window Not used in this unit (Opened) “H”: Playback EFM sync and interpolation protection timing match Not used in this unit (Opened) EFM decoder PLL clock output (98 fs=4.3218 MHz) XPLCK...
  • Page 30 Pin No. Pin Name Function TEST1 Test pin (Fixed at “L”) Input of ADIP dual FM signal from CXA1981AR (IC101) (22.05 kHz ± 1 kHz) ADFG (TTL Schmidt input) TS25 Test pin (Fixed at “L”) LDDR Laser APC signal output TRDR Tracking servo drive signal output (–) TFDR...

  • Page 31: Ic201 System Control (M37610Md-067Fp)

    • IC201 System Control (M37610MD-067FP) Pin No. Pin Name Function C.SET1 C.SET2 Not used in this unit (Fixed at “L”) KEY3 4 to 6 KEY 2 to KEY 0 Not used in this unit (Fixed at “H”) — Not used in this unit (Fixed at “L”) XINT Interrupt status input from CXD2536R (IC221) SENS...
  • Page 32 Pin Name Pin No. Function — Not used in this unit (Fixed at “L”) SCLK Clock signal output to the serial bus SWDT Write data signal output to the serial bus SRDT Read data signal input from the serial bus —...
  • Page 33 Pin No. Pin Name Function LDOUT Loading motor (M191) control output*1 LDIN REC-SW Detection input from the chucking-in switch (S193). When chucking: “L”. Detection input from the loading-in switch (S191). PLAYSW When the magnetic head is lowered: “L”, others: “H”. Detection input from the loading-out switch (S192).

  • Page 34: Ic271 Shock-Proof Memory Controller, Atrac Encoder/Decoder (Cxd2536R)

    • IC271 Shock-Proof Memory Controller, ATRAC Encoder/Decoder (CXD2536R) Pin No. Pin Name Function Power supply pin (+5V) — SWDT Input of write data signal from system controller (IC201) Input of serial clock signal from system controller (IC201) XLAT Input of serial latch signal from system controller (IC201) SRDT Output of read data signal to system controller (IC201) SENSE...
  • Page 35 Pin No. Pin Name Function A11, A10 Address signal output. Not used in this unit (Opened) 48, 49 — Ground pin Power supply pin (+5V) — A03 to A00 52 to 55 Output of address signal to RAM (IC272) A04 to A08 56 to 60 Output of output enable control signal to RAM (IC272) XCAS...

  • Page 36: Ic301 A/D Converter (Cxd8566M)

    • IC301 A/D Converter (CXD8566M) Pin No. Pin Name Function AINL+ Lch analog (+) input AINL– Lch analog (–) input VREFIN Reference voltage input (+3.2V) AVDD — Modulator analog power supply (+5V) AVss — Modulator analog Ground ANAPD Modulator power down. “H”: Normal operation, “L”: Power down. (Fixed at “H”) HPBYP Test pin.

  • Page 37: Ic701 Display Control, Led Drive

    • IC701 Display control, LED drive Pin No. Pin Name Function 1 to 3 — — Not used in this unit (connected to ground) — AVss Ground pin (A/D converter) 5, 6 — — Not used in this unit (connected to ground) —...

  • Page 38: Exploded Views

    4-977-680-01 KNOB (JOG) 4-977-677-01 INDICATOR (DIGITAL) X-4945-295-1 BRACKET (LEVER) ASSY 4-977-667-01 PANEL, FRONT 4-977-671-01 BUTTON (MODE) 4-951-620-01 SCREW (2.6X8), +BVTP 4-962-708-01 EMBLEM (4-A), SONY * 19 A-4699-001-A PANEL BOARD, COMPLETE (SP,HK,JE) X-4946-465-1 BUTTON (PLAY) ASSY * 19 A-4699-005-A PANEL BOARD, COMPLETE (US,CND)

  • Page 39: Chassis Section

    6-2. CHASSIS SECTION MDM-2B not supplied not supplied (US, CND) not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-977-699-11 LEG (F) 1-776-168-11 WIRE (FLAT TYPE) (21 CORE) 4-965-822-01 FOOT * 58 A-4699-000-A POWER BOARD, COMPLETE (SP,HK,JE) * 53 4-977-679-21 PANEL, BACK (SP,HK,JE) * 53...

  • Page 40: Mechanism Deck Section (Mdm-2B)

    6-3. MECHANISM DECK SECTION (MDM-2B) not supplied not supplied not supplied M191 MBU-2B not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-983-100-01 COLLAR (DAMPER) * 122 1-653-412-11 MOTOR BOARD 4-967-671-01 INSULATOR (MD) A-4660-647-I BRACKET (LVO) ASSY 4-967-673-01 SPRING, COMPRESSION X-4946-378-1 HOLDER ASSY...

  • Page 41: Base Unit Section (Mbu-2)

    6-4. BASE UNIT SECTION (MBU-2) S102 HR901 not supplied not supplied M102 not supplied M101 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque ! sont critiques pour la sécurité.

  • Page 42: Electrical Parts List

    SECTION 7 ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the parts list • CAPACITORS The components identified by mark ! uF : µ F may be different from the parts specified in the or dotted line with mark ! are critical diagrams or the components used on the set.
  • Page 43 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC121 8-752-375-06 IC CXD2535AR *NOTE R116 1-216-069-00 METAL CHIP 6.8K 1/10W IC121 8-752-375-36 IC CXD2535BR * NOTE R117 1-216-113-00 METAL CHIP 470K 1/10W IC122 8-759-243-19 IC TC7SU04F R120 1-216-025-91 METAL GLAZE 1/10W R121...
  • Page 44 DETECTION SW DIGITAL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < VARIABLE RESISTOR > C304 1-126-204-11 ELECT CHIP 47uF C305 1-163-038-91 CERAMIC CHIP 0.1uF RV101 1-241-396-11 RES, ADJ, METAL GLAZE 22K RV102 1-241-396-11 RES, ADJ, METAL GLAZE 22K C306 1-163-038-91 CERAMIC CHIP 0.1uF...
  • Page 45 DIGITAL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C416 1-164-346-11 CERAMIC CHIP IC301 8-759-352-63 IC CXD8566M (US,CND) IC302 8-759-352-59 IC CXA8054M C417 1-163-038-91 CERAMIC CHIP 0.1uF C418 1-163-038-91 CERAMIC CHIP 0.1uF IC341 8-759-362-47 IC CXD8567AM C419 1-163-038-91 CERAMIC CHIP 0.1uF...
  • Page 46 DIGITAL MOTOR PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R235 1-216-097-91 METAL GLAZE 100K 1/10W R361 1-216-687-11 METAL CHIP 0.5% 1/10W R236 1-216-097-91 METAL GLAZE 100K 1/10W R362 1-216-687-11 METAL CHIP 0.5% 1/10W R238 1-216-097-91 METAL GLAZE 100K 1/10W...
  • Page 47 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-653-412-11 MOTOR BOARD C743 1-162-282-31 CERAMIC 100PF C744 1-162-282-31 CERAMIC 100PF *********** < CAPACITOR > C745 1-162-282-31 CERAMIC 100PF C746 1-162-282-31 CERAMIC 100PF C199 1-164-159-11 CERAMIC 0.1uF C747 1-162-282-31 CERAMIC 100PF...
  • Page 48 PANEL POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R714 1-249-423-11 CARBON 3.3K 1/4W F S714 1-554-303-21 SWITCH, TACTILE ( P) R715 1-249-423-11 CARBON 3.3K 1/4W F S715 1-554-303-21 SWITCH, TACTILE (0) R716 1-249-413-11 CARBON 1/4W F S716 1-554-303-21 SWITCH, TACTILE (p)
  • Page 49 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C152 1-126-941-11 ELECT 470uF < IC > C153 1-126-941-11 ELECT 470uF C202 1-162-600-11 CERAMIC 0.0047uF IC101 8-759-231-53 IC TA7805S C203 1-162-294-31 CERAMIC 0.001uF IC102 8-759-917-18 IC SN74HCU04AN C204 1-126-947-11 ELECT 47uF...
  • Page 50 MDS-M9 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R131 1-247-887-00 CARBON 220K 1/4W MISCELLANEOUS ************** R132 1-247-807-31 CARBON 1/4W R133 1-247-807-31 CARBON 1/4W 1-776-417-11 WIRE (FLAT TYPE) (18 CORE) R134 1-249-437-11 CARBON 1/4W 1-776-416-11 WIRE (FLAT TYPE) (30 CORE)

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