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Sony MDS-EX880 Service Manual
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Sony MDS-EX880 Service Manual

Sony MDS-EX880 Service Manual

Mini disc deck
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SERVICE MANUAL
MDS-EX880/MS717 are the mini disc
deck section in DHC-EX880MD/MD717.
U.S and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
MICROFILM
MDS-EX880/MS717
Photo: MDS-MS717
SPECIFICATIONS
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pidk-up Name
MINI DISC DECK
AEP Model
UK Model
MDS-EX880
E Model
Tourist Model
MDS-MS717
HCD-MD515
MDM-C1C
KMS-260A/J1N

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  • Page 1 AEP Model UK Model MDS-EX880 E Model Tourist Model MDS-MS717 Photo: MDS-MS717 MDS-EX880/MS717 are the mini disc deck section in DHC-EX880MD/MD717. Model Name Using Similar Mechanism HCD-MD515 U.S and foreign patents licensed from Dolby Laboratories Licensing Corporation. MD Mechanism Type...

  • Page 2: Self Diagnostic Function

    SELF DIAGNOSTIC FUNCTION This set can display the error history using the self disagnostic Table 1-1. function. Display Description (error No./code) 1. OPERATING THE ERROR HISTORY MODE 0 E00 No error [                SELECTOR                 ] All operations are performed using the [PROGRAM] dial and button.

  • Page 3: Table Of Contents

    OPERATION. REPLACE THESE COMPONENTS WITH ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN. SONY PARTS WHOSE PART NUMBERS APPEAR AS VIGYAZAT ! : A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU- SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- GÁRVESZÉLY ! KERÜLJE A BESUGÁRZÁST !
  • Page 4 POWER SUPPLY DURING SERVICING AGING MODE • As this set has not own power supply, it does not operate inde- In the AGING mode, the MD operation can be checked. pendently. Therefore, during servicing, connect it to the Pre-Main amplifier Unit (TA-EX880/MS717) of DHC-EX880MD/MD717. •...

  • Page 5: General

    1 ANALOG IN terminal 2 ANALOG OUT terminal 3 OPTICAL DIGITAL IN, CD PLAYER terminal 4 OPTICAL DIGITAL IN, VIDEO 1 terminal (MDS-EX880) 4 OPTICAL DIGITAL IN, CS/BS terminal (MDS-MS717) 5 OPTICAL DIGITAL IN, VIDEO 2 terminal (MDS-EX880) 5 OPTICAL DIGITAL IN, LD/DVD terminal (MDS-MS717) 6 SYSTEM CONTROL terminal –...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CASE, FRONT PANEL SECTION 2 case 1 two screws (CASE3 TP2) 1 two screws (CASE3 TP2) 4 wire (flat type) (13 core) (160 mm) (CN302) 4 wire (flat type) (9 core) (CN305) 3 connector (CN306)
  • Page 7 HOLDER (FN), CHASSIS (TOP) 3 two screws (BVTT2.6 × 5) 7 screw (BVTT2.6 × 5) 4 cover (FFC) 9 bracket (3) 6 two screws (P2 × 5) 5 wire (flat type) (13 core) (185 mm) (CNP12) 0 chassis (TOP) 5 wire (flat type) (7 core) (CNP15) 8 lever (S) ass’y 2 holder (FN)
  • Page 8 CHASSIS (ELEVATOR) (NEW) ASS’Y 1 Remove the chassis (elevator) (new) ass’y to the direction of the arrow. MOTOR (HEAD) ASS’Y (M905) 7 Remove two solders of motor (M905). 6 MOTOR RELAY board 1 connector 3 screw (CNP19) (BVTT2.6 × 5) 2 belt (A) 6 Remove the motor (head) ass’y (M905) to direction of the arrow B .
  • Page 9 BASE UNIT SECTION (MBU-C1P) over write head 1 two step screws 1 two step screws 2 base unit 3 connector (MBU-C1P) (CN108) chassis (elevator) Lift up the over write head carefully not to touch. BD BOARD 2 two precision screws (P1.7 ×...
  • Page 10 OVER WRITE HEAD (HR901) 1 precision screw (P1.7 × 2.5) 2 over write head (HR901) OPTICAL PICK-UP (KMS-260A/J1N) 4 Remove the optical pick-up (KMS-260A/J1N) to direction of the arrow. 1 special screw (M1.7 × 1.4) 2 stopper 3 shaft (MAIN) –...

  • Page 11: Test Mode

    SECTION 4 TEST MODE PRECAUTIONS FOR USE OF TEST MODE SELECTING THE TEST MODE 1. The erasing-protection tab is not detected in the test mode. Twenty six test modes are selected by turn the [                SELECTOR                 ] Therefore, operating in the recording laser emission mode and dial.
  • Page 12 OPERATING THE CONTINUOUS PLAYBACK OPERATING THE CONTINUOUS RECORDING MODE MODE 7-1. Entering the Continuous Playback Mode 8-1. Entering the Continuous Recording Mode 1. Set the disc in the slot 1 of unit. (In several seconds it will be 1. Set the MO disc in the slot 1 of unit. (Refer to note 3.) [     ...
  • Page 13 10. FUNCTIONS OF OTHER BUTTONS 1. MODE display Displays “TEMP ADJUST”, “CPLAY MODE”, etc.. Table 3. 2. Error rate display Button Contents Error rates are displayed as follows. Sets continuous playback when pressed in the AD = STOP state.(servo all on) fl...

  • Page 14: Electrical Adjustments

    SECTION 5 ELECTRICAL ADJUSTMENTS PRECAUTIONS FOR CHECKING LASER DI- PRECAUTIONS FOR ADJUSTMENTS ODE 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 eyesight.
  • Page 15 TEMPERATURE COMPENSATION OFFSET LASER POWER ADJUSTMENT ADJUSTMENT Preparation: Referring to “3. Disassembly”, remove the Base Unit from MD Save the temperature data at that time in the non-volatile memory Mechanism Deck. as 25°C reference data. Notes: 1. Usually, do not perform this adjustment. Connection: laser 2.
  • Page 16 [                SELECTOR                 ] TRAVERSE (E-F BALANCE) ADJUSTMENT 8. Turn the dial so that the waveforms of the oscilloscope becomes the specified value. (When the Note 1:Data will be erased during MO reading if a recorded disc is [       ...
  • Page 17 FOCUS BIAS ADJUSTMENT ERROR RATE CHECK 9-1. CD Error Rate Check Adjusting Method: 1. Load a continuously recorded disc (Refer to “4. Creating MO Checking Method: Continuously Recorded Disc”) to slot 1. 1. Load a test disc TDYS-1 to slot 1. [     ...
  • Page 18 11. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] – SIDE A – CN101 D101 [BD BOARD] – SIDE B – CN107 IC316 TP30 IC121 (IOP–) TP68 TP58 (FE) (VC) TP29 (IOP+) TP69 TP95 (TEO) (RF) IC101 – 18 –...

  • Page 19: Diagrams

    MDS-EX880/MS717 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – MD SERVO Section – IC121 (1/2) (Page 21) OVER WRITE EFMO ADDT HEAD DRIVE IC181, Q181, 182 HR901 FILI OVER WRITE HEAD DIGITAL SIGNAL PROCESSOR, SCTX EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER,...

  • Page 20: Block Diagram - Main Section

    MD ANALOG : MD REC (DIGITAL INPUT) OPTICAL OPTICAL DIGITAL IN REC AMP RECEIVER AINL CD PLAYER IC318 IC302 (Page 20) SDTO R-CH MDS-EX880 MDS-MS717 AINR R-CH (Page 20) OPTICAL OPTICAL OPTICAL BUFFER RECEIVER DIGITAL IN DIGITAL IN 14 2 IC304...
  • Page 21 • Circuit Boards Location MOTOR RELAY board HEAD SW board MECH RELAY board DISC SW board MAIN board BD board PANEL (L) board SW board LED board PANEL (FL) board ELEVATOR RELAY board PANEL (R) board – 23 –...
  • Page 22 • Waveforms – BD Board – 1 IC101 1, 2 (I, J) (MD Play Mode) 5 IC152 #™ (CAPA –) (MD Play Mode) 9 IC121 @∞ (LRCK), IC201 !¡ (LRCK) Approx. 4 Vp-p 3.3 Vp-p 500 mVp-p 2.5 µ s 23 µ...
  • Page 23 – MAIN Board – 1 IC305 !¡ (X1) 3.9 Vp-p 5 MHz – PANEL Board – 1 IC701 @º (XOUT) 4.9 Vp-p Approx. 456 kHz 2 IC701 @¡ (XIN) 780 mVp-p Approx. 440 kHz – 49 –...
  • Page 24 • IC Block Diagrams – BD Board – IC101 CXA2523AR 43 42 USROP – RF AGC – USRC RFA1 BPF3T RFA2 PEAK3T – HLPT –1 – – –2 – CFST PTGR TEMP PEAK – –2 – BOTTOM 36 BOTM – –1 GRVA 35 ABCD...
  • Page 25 IC121 CXD2652AR 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 73 SE MNT1 MONITOR EACH 72 AVSS CONTROL BLOCK...
  • Page 26 IC152 BH6511FS-E2 INTERFACE INTERFACE CHARGE PREDRIVE PREDRIVE PUMP. PREDRIVE PREDRIVE INTERFACE INTERFACE IC172 BA6287F OUT1 OUT2 DRIVER DRIVER VREF CONTROL LOGIC POWER SAVE IC201 AK4520A-VF-E2 ∆Σ 8× CLOCK MODULATOR INTERPOLATOR DIVIDER ∆Σ 8× MODULATOR INTERPOLATOR COMMON SERIAL I/O VOLTAGE INTERFACE ∆Σ...
  • Page 27 – MAIN Board – IC306 SN74HC153AN DATA INPUTS STROBE OUTPUT SELECT STROBE 1C0 OUTPUT SELECT DATA INPUTS IC308, 309 BA6208 MOTOR SWITCH DRIVE MOTOR SWITCH DRIVE IC317 M62016L INTERRUPT SIGNAL – GENERATING BLOCK RESET SIGNAL – GENERATING BLOCK RESET – 53 –...
  • Page 28 – PANEL (FL) Board – IC701 M66004M8FP 64 - 61 59 - 33 (35BIT x 16) DECODER CODE SELECT INDICATION SEGMENT INDICATION CODE/COMMAND INDICATION CODE DIGIT OUTPUT OUTPUT CONTROL CONTROL CONTROLLER RESISTOR CIRCUIT CODE CIRCUIT CIRCUIT RESISTOR (8BIT x 16) WRITE DECODER (35BIT x 16)

  • Page 29: Ic Pin Function Description

    6-11. IC PIN FUNCTION DESCRIPTION • BD BOARD IC101 CXA2523AR (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin Name Function I-V converted RF signal I input from the optical pick-up block detector I-V converted RF signal J input from the optical pick-up block detector Middle point voltage (+1.65V) generation output terminal 4 to 9 A to F...
  • Page 30 • BD BOARD IC121 CXD2652AR (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER, 2M BIT D-RAM) Pin No. Pin Name Function Focus OK signal output to the MD mechanism controller (IC316) MNT0 (FOK) “H” is output when focus is on (“L”: NG) MNT1 (SHCK) Track jump detection signal output to the MD mechanism controller (IC316) MNT2 (XBUSY)
  • Page 31 Pin No. Pin Name Function Two-way data bus with the D-RAM (IC124) MVCI Digital in PLL oscillation input from the external VCO Not used (fixed at “L”) ASYO Playback EFM full-swing output terminal ASYI I (A) Playback EFM asymmetry comparator voltage input terminal AVDD —...
  • Page 32 Pin No. Pin Name Function SPRD Spindle servo drive PWM signal (–) output to the BH6511FS (IC152) SPFD Spindle servo drive PWM signal (+) output to the BH6511FS (IC152) TEST0 TEST1 Input terminal for the test (fixed at “L”) TEST2 TEST3 DVSS —...
  • Page 33 • MAIN BOARD IC305 µPD78078GF-082-3BA (MASTER CONTROLLER) Pin No. Pin Name Function DATA0 to 1 to 4 Two-way data bus with the system control bus DATA3 CLOCK OUT Bus data transfer clock signal output terminal for the system control bus 6, 7 Not used (fixed at “L”) POW DOWN...
  • Page 34 Pin No. Pin Name Function FL RES Forced reset signal output to the fluorescent indicator tube driver (IC701) “L”: forced reset SIO RXD UART data input from the MD mechanism controller (IC316) SIO TXD UART data output to the MD mechanism controller (IC316) SIO CLK Serial data transfer clock signal output to the MD mechanism controller (IC316) UART data transmission request signal output to the MD mechanism controller (IC316)
  • Page 35 Pin No. Pin Name Function DISC2 SW Detection input from the disc detect switch “L”: disc in Not used (fixed at “H”) DISC3 SW Detection input from the disc 2 detect switch (S3) “L”: disc 2 in DISC4 SW Detection input from the disc detect switch “L”: disc in Not used (fixed at “H”) DISC5 SW Detection input from the disc 3 detect switch (S5) “L”: disc 3 in OUT SW...
  • Page 36 • BD BOARD IC316 M30610MCA-253FP (MD MECHANISM CONTROLLER) Pin No. Pin Name Function JOG0 JOG dial pulse input of the rotary encoder Not used (fixed at “L”) JOG1 JOG dial pulse input of the rotary encoder Not used (fixed at “L”) 3, 4 —...
  • Page 37 Pin No. Pin Name Function Recording data output enable signal output to the CXD2652AR (IC121) and overwrite head SCTX driver (IC181) Writing data transmission timing output (Also serves as the magnetic head on/off output) — Not used (fixed at “L”) Laser power select signal output to the CXD2652AR (IC121) and HF module switch circuit WRPWR “H”: recording mode, “L”: playback mode...
  • Page 38 Pin No. Pin Name Function — Not used (fixed at “L”) — Not used (fixed at “H”) Input terminal for setting mini-disc single mode or changer mode MODE “L”: mini-disc single mode, “H”: changer mode (fixed at “H” in this set) 84, 85 —...

  • Page 39: Exploded Views

    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 40 4-995-081-01 LATCH, DC * 71 A-4724-097-A PANEL (FL) BOARD, COMPLETE X-4949-026-1 PANEL ASSY, FRONT * 72 A-4724-096-A PANEL (R) BOARD, COMPLETE 4-962-708-01 EMBLEM (4-A), SONY 1-783-039-11 WIRE (FLAT TYPE) (11 CORE) 4-948-109-01 GEAR 4-951-620-41 SCREW (2.6), +BVTP – 66 –...
  • Page 41 (3) MD MECHANISM DECK SETCION-1 (MDM-C1C) not supplied M905 not supplied MBU-C1P Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-987-327-01 INSULATOR 3-701-438-21 WASHER (E-2.3), NYLON 4-987-240-01 SCREW, STEP 3-018-636-01 GEAR (PULLEY) (C) * 103 4-994-631-01 HOLDER (RN) 3-018-203-01 GEAR (HEAD) (A) * 104 4-994-633-01 HOLDER (FN)
  • Page 42 (4) MD MECHANISM DECK SETCION-2 (MDM-C1C) M903 M904 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-986-951-01 GEAR (4) 4-986-953-01 WORM 4-987-243-01 BELT, TOOTHED LOCK * 168 1-667-394-14 ELEVATOR RELAY BOARD 4-986-947-01 STOPPER 1-782-909-11 WIRE (FLAT TYPE) (13 CORE) (185mm) 3-701-438-21 WASHER (E-2.3), NYLON X-4947-928-1 BRACKET (1A) ASSY 4-987-236-01 SPRING, TORSION...
  • Page 43 (5) BASE UNIT SECTION (MBU-C1P) M901 HR901 M902 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. No. Part No. Description Remark * 201...

  • Page 44: Electrical Parts List

    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 are seldom required for routine service. parts list may be different from the parts speci- ! are critical for safety.
  • Page 45 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C350 1-163-038-00 CERAMIC CHIP 0.1uF < TRANSISTOR > C351 1-163-038-00 CERAMIC CHIP 0.1uF C352 1-126-204-11 ELECT CHIP 47uF Q101 8-729-403-35 TRANSISTOR UN5113 C353 1-163-038-00 CERAMIC CHIP 0.1uF Q102 8-729-026-53 TRANSISTOR 2SA1576A-T106-QR Q103 8-729-402-93 TRANSISTOR UN5214-TX...
  • Page 46 DISC SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R179 1-216-091-00 METAL CHIP 1/10W R439 1-216-073-00 METAL CHIP 1/10W R180 1-216-073-00 METAL CHIP 1/10W R440 1-216-073-00 METAL CHIP 1/10W R181 1-216-073-00 METAL CHIP 1/10W R441 1-216-097-00 RES, CHIP 100K 1/10W...
  • Page 47 ELEVATOR RELAY HEAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-667-394-14 ELEVATOR RELAY BOARD D803 8-719-064-55 LED SEC1803C (MD 3) ********************* ************************************************************ < CAPACITOR > A-4407-881-A MAIN BOARD, COMPLETE ********************* 1-126-382-11 ELECT 100uF 6.3V 1-161-494-00 CERAMIC 0.022uF...
  • Page 48 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C371 1-126-059-11 ELECT 10uF D330 8-719-200-82 DIODE 11ES2 C372 1-126-059-11 ELECT 10uF D331 8-719-200-82 DIODE 11ES2 C373 1-164-159-11 CERAMIC 0.1uF D332 8-719-200-82 DIODE 11ES2 C374 1-162-290-31 CERAMIC 470PF C375 1-162-290-31 CERAMIC...
  • Page 49 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R357 1-249-417-11 CARBON 1/4W < RESISTOR > R358 1-249-417-11 CARBON 1/4W R359 1-249-417-11 CARBON 1/4W R301 1-249-417-11 CARBON 1/4W R360 1-249-425-11 CARBON 4.7K 1/4W R302 1-249-417-11 CARBON 1/4W R361 1-249-425-11 CARBON...
  • Page 50 MECH RELAY MOTOR RELAY PANEL (FL) PANEL (L) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-667-396-14 MECH RELAY BOARD < RESISTOR > ****************** R701 1-216-025-00 RES, CHIP 1/10W < CONNECTOR > R702 1-216-025-00 RES, CHIP 1/10W R703 1-216-025-00 RES, CHIP...
  • Page 51 PANEL (R) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4724-096-A PANEL (R) BOARD, COMPLETE < SWITCH > ************************** S661 1-475-421-11 ENCODER, ROTARY (= SELECTOR +) < CAPACITOR > S711 1-762-875-21 SWITCH, KEYBOARD (MD 1) S712 1-762-875-21 SWITCH, KEYBOARD (MD 2) C661 1-163-011-11 CERAMIC CHIP...
  • Page 52 MDS-EX880/MS717 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 7-627-553-17 PRECISION SCREW +P 2X2 TYPE3 7-624-106-04 STOP RING 3.0, TYPE-E 7-624-102-04 STOP RING 1.5, TYPE-E 7-685-853-04 SCREW +BVTT 2X6 (S) 7-621-772-10 SCREW +B 2X4 7-627-852-28 +P 1.7X3 7-627-000-00 SCREW, PRECISION +P 1.7X2.2 TYPE3...

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