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Sony MDS-303 Service Manual
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Sony MDS-303 Service Manual

Sony MDS-303 Service Manual

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E
SERVIC
MANUAL
SONY
MD deck section
MiniDisc digital audio system
System
Disc
MiniDisc
Semiconductor
Laser
Emission
Laser output power
Less than 44.6 PW •
• This output is the value measuredat a
distance of 200 mm from the objective
lens surface on the optical pick-up
block with 7 mm aperture.
Laserdiode properties
Material:
Revolutions (CLV)
400 rpm to 900 rpm
Error correction
Advanced
Solomon Code (ACIRC)
Sampling frequency
44.1 kHz
EFM (Eight-to-Fourteen Modulation)
Modulation system
Number
of channels
2 stereo channels
5 to 20,000 Hz ±0.5 dB
Frequency response
Signal-to-noise ratio
Over 96 dB
(during playback)
Wow and flutter
Below
Inputs
Jack type
Input
impedance
Phono jacks
47 kilohms
LINE
(ANALOG) IN
Refer t o
SPECIFICATIONS
laser (X=780 nm)
duration:
continuous
GaAlAs
Cross
Interleave
Reed
measurable
limit
Rated input
Minimum
input
500 mVrms
125 m Vrms
MDS-303
Model Name Using Similar Mechanism
Mechanism Type
Base Unit Type
Optical Pick-up Block Type
DIGITAL IN
Square
Optical
optical
wave
lenghth
connector
jack
Outputs
Jack
Rated output
type
Stereo
PHONES
10mW
phone
jack
LINE
Phono
2 V rms
(ANALOG)
jacks
(at 50 kilohms)
OUT
DIGITAL
Square
—18 dBm
OUT
optical
jack
SONY
AEP
Mode/
UK
Model
MDS-302
MDM-2A
MBU-2
KMS-210A/J-N
Load impedance
32 ohms
Over
10 kilohms
Wave length:
660 nm
— Continued
on next page —
MINIDISC DECK

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Summary of Contents for Sony MDS-303

  • Page 1 MDS-303 SERVIC MANUAL Mode/ Model SONY Model Name Using Similar Mechanism MDS-302 MDM-2A Mechanism Type Base Unit Type MBU-2 Optical Pick-up Block Type KMS-210A/J-N SPECIFICATIONS MD deck section DIGITAL IN Square Optical optical wave MiniDisc digital audio system lenghth System...
  • Page 2 3-6. Test Mode Displays ..24 RM-D4M 3-7. Meanings of Other Displays • • ....• Sony SUM-3 (NS) batteries (2) 3-8. Precautions for Use of Test Mode .... 24 U.S.and foreign patentslicensedfrom Dolby Laboratories SECTION 4.
  • Page 3 SAFETY-RELATED COMPONENT WARNING COMPONENTS IDENTIFIED MARK OR DOTTED LINE WITH MARK ON THE SCHEMATIC DIAGRAMS IN THE PARTS LIST CRITICAL SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR SHOWN THIS MANUAL SUPPLEMENTS PUBLISHED SONY.
  • Page 4 SECTION GENERAL FRONT PANEL @ REC(recording) L EVEL control ON/STANDBYindicator t] POWERswitch REC(recording) b utton B] TIMERswitch • (stop) button b] 11 (pause) button Disc compartment EJECT button > (play) button G] EDIT NObutton knob E] EDITYESbutton DISPLAY button (search)buttons SCROLL button [Y] PLAY MODEbutton...
  • Page 5 This section is extracted from instruction manual.
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  • Page 19 SECTION DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. CASE O Two screws (M3x8) Two screws (M3x8) 2-2. FRONT PANEL ASSEMBLY O Connector 3P (Power board, CN591) Connector (Powerboard, CN611) O Flat wire cable 22P (Digital board, CN201 ) O Frontpanel assembly Five...
  • Page 20 2-3. MECHANISM DECK O Two screws screws (B2.6x18) (B2.6x18) O Two collars collars Remove the mechanism deck Insulator (MD) in the arrow direction. Compression spring O Insulator(MD) Connector O Compression spring (Digital board, CN251) Flat wire cable 30P O Insulator (MD) (Digital board, CN202) O Compressionspring Flat wire cable...
  • Page 21 2-5. BASE UNIT LOADING MOTOR ASSEMBLY O Belt screws (B2.6x5) O Screw O Connector (BVTP3x6) (CN192) O Loadingmotorassembly O Two screws (BVTP3x6) O Baseunit(MBU-2) 2-6. SLIDER ASSEMBLY MOUNTING O Movethesliderassembly in arrow direction O, and lock it to the lever (SLM). O Rotatefully the lever (SLM) in arrow direction O...
  • Page 22 SECTION TEST MODE 3-1. Setting the Test Mode While pressing the AMS knob, insert the power plug into the power supply inlet, and release the AMS knob. 3-2. Exiting the Test Mode Disconnect the power plug from the power supply inlet. 3-3.
  • Page 23 3-4-2. Operating the Continuous Recording Mode Entering the continuous recording mode O Set the MO disc in the unit. 2 Rotate the AMS knob and display "CREC MODE". 3 Pressthe YES key to changethe displayto "CREC IN". lights up. @ Whenaccess completes, t he displaychanges to "CREC Note : The displayed are arbitrary numbers.
  • Page 24 3-6. Test Mode Displays Each time the DISPLAY key is pressed,the display changes in the following order. MODE display— Error rate display— Address display MODE display Displays "TEMP ADJUST", "CPLAY MODE", etc. Address display Addresses are displayed as follows. (MO pit and CD) (MO groove) h = : Header address...
  • Page 25 SECTION ELECTRICAL ADJUSTMENTS 4-1. Precautions for Checking Laser Diode 4-3. Precautions for Adjustments Emission When replacing the following parts, perform the adjustments and checks with O in the order shown in the following To check theemission of the laser diode during adjustments, never table.
  • Page 26 4-6. Laser Power Adjustment 4-5. Temperature Compensation Offset Adjustment Connection Laser power Savethe temperaturedataat that time in the non-volatile memory as meter 25 oc reference data. Note 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 oc Optical pickup to 28 oc.
  • Page 27 4-7. Traverse Adjustment I I. Rotate the AMS knob until the waveform of the oscilloscope Connection Oscilloscope moves closer to the specified value. 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 28 4-8. Focus Bias Adjustment 4-9. Error Rate Check 4-9-1. CD Error Rate Check Adjusting Method : Load a continuously recordeddisc (Refer to "4-4. Creating Checking Method : MO Continuously Recorded Disc".). Load astest disc TDYS-I. Rotate the AMS knob and display "CPLAY MODE". Rotate the AMS knob and display "CPLAY MODE".
  • Page 29 4-11. Adjusting Points and Connecting Points [BD BOARD] (COMPONENT SIDE) DIOI * IC191 [BD BOARD] (CONDUCTOR SIDE) (IOP) ICIOI RVIOI (VC) IC171 RV102 (TEO) IC121...
  • Page 30 SECTION DIAGRAMS 5-1. CIRCUIT BOARDS LOCATION OWH FLEXIBLE board board MOTOR board POWER SW board DETECTION SW board POWER board HP board DISPLAY board DIGITAL board board...
  • Page 31 MDS-303 5-2. BLOCK DIAGRAM PROCESSOR. FILTER SERVO SIHAL PROCESSOR. OVER HEAO e LOT PROCES%IR OPT I CAL READER/ PICK-UP BLOCK LEVEL (KMS-21 OA/J-N) IC27' Foe /0Ehoe WFFER 'ON-VERT icX42 REAR • C2P0 PEAK FILTER EECOEER ENCCOER SOT ray INTERFACE PHASE COMPARATOR •...
  • Page 32 MDS-303 5-3. PRINTED WIRING BOARDS—RF SECTION— • See page 30 for Circuit Boards Location. • IC Block Diagrams . Semiconductor IC121 CXD2535AR IC151 MPC17A38VMEL Location Ref. No. Location avss BOARD ) FLEXIBLE DIOI 0155 F_ll 0161 HR901 OPTICAL 0181 OVER...
  • Page 33 MDS-303 5-4. SCHEMATIC DIAGRAM— RF SECTION— • see page 58 for IC Pin Functions. (ICIOI, IC121) BOARD) IC181 i-EAO CVER IC182 FLEX IBLE BOARD S. e 6.0 PICK-UP BLOCK IC172 1 SET (Kus-21 OA/J-N) BUFFER CCIL TFX- COIL FCS- [LCC GCTÜ...
  • Page 34 MDS-303 5-5. SCHEMATIC DIAGRAM— DIGITAL SECTION— • See page 62 for IC Pin Functions. , IC271) t DETECTION BOARD J (DIGITAL BOARD J C301 I C302 Poge53 ) t MOTOR BOARD PLAY I-c•o-0JT oooooooooc» ooooooooowooc»c» 0000 IC411 o LOO La•a--cvl LN0-tv •...
  • Page 35 MDS-303 5-6. PRINTED WIRING BOARDS— SECTION— • IC Block Diagrams • See page 30 for Circuit Boards Location. IC271 CXD2536AR IC301 CXD8566M-T6 AINR+ 01K PCL AINL+ — ANALOG uUX IDIGITAL BOARD (SIDE (CHASSIS) (DIGITAL (S I DE cow. BOARD AINC- ENC06ER/.
  • Page 36 MDS-303 5-7. SCHEMATIC DIAGRAM— DISPLAY/POWER SECTION • Waveform DISPLAY BOARD ( POWER BOARD TRACK 1 sc STEP 4.9Vp-p @ IC701 mpin 424KHz LEVEL—SYNC REPEAT IA-B —SYNC POSER FL70t SHUFFLE A.SPACE PROGRAM A.PAUSE •Sv,'t7v CSOI 00000 -sav IC702 00000 000000000000 SlaNAL REYOTE iiZH•...
  • Page 37 MDS-303 5-8. PRINTED WIRING BOARDS— DISPLAY/POWER SECTION— • See page 30 for Circuit Boards Location. • Semiconductor IC541 BA3960 Location 48 ) Ref. No. Location t DISPLAY BOARD DIGITAL BOARD REF.VOLTAOE CN201 0501 0502 0503 S776 0504 CN76 0505 0506...
  • Page 38 5-9. IC PIN FUNCTIONS RF AMP (CXA1981R) Signal Name 1/0 Description Pin. terminal the center point vol tage (+2. 5V) generated Output input from detector circuit in the optical pick—up block Signal (-) input of the operational amplifier for F signal Signal output of the operational amplifier...
  • Page 39 • IC121 DIGITALSIGNAL PROCESSOR, DIGITALSERVO S IGNAL PROCESSOR. EFM/ACIRC E NCODER/DECODER (CXD2535AR) Pin. Signal Name Description FS256 11. 2896MHz clock signal output (MCLKsystem) Not used this set (open) Focus 0K signal output to the system controller (IC201) "H" is output when the focus is applied DFCT Defect ON/OFF selection signal output to CXD2536R ac271)
  • Page 40 Pin. Signal Name Description MCLKclock (22. 5792MHz) signal output MCLK BCK (pin 32) inverted output XBCK Power supply terminal (+5V) (Digi tal system) DVDD WDCK clock (88. 2kHz) signal output WDCK (MCLK system) RFCKclock (7. 35kHz) signal output (MCLK system) RFCK WFCK clock (7.
  • Page 41 Signal Name Description Test input terminal (Fixed at "L") TEST3 Power supply terminal (+5V) (Analog system) AVDD A/D converter action limits (upper side) vol tage input (Fixed at ADRT "H") A/D converter action limits (lower side) vol tage input (Fixed at ADRB "L") AVSS...
  • Page 42 SYSTEM CONTROLLER (M37610MD-052FP) Description Pin. Signal Name Fixed "L" C. SET 1 C. SET O Fixed Not used this set (Fixed at KEY 3 Key input terminal terminal (A/D input) KEY 2-KEY Key input Fixed Interruption status input from CXD2536R (IC271) XINT Internal status...
  • Page 43 Description Pi n. Signal Name Clock signal output to the serial SCLK SWDT Write data signal output to the serial Read data signal input from the serial SRDT Connected to the pin. 51 Serial clock signal output to the display driver (IC701) FLCLK Serial data signal output to the display driver...
  • Page 44 Description Signal Name Detection signal input from the loading in swi tch (S192) INSW "L" at the posi t ion where the head descends, Others: Detection signal input from the loading out switch (S191) OUTSW "L" at the position of load out, Others: "H" Rec proof detection signal input from the protect...
  • Page 45 SHOCK PROOF MEMORY C ONTROLLER. ATRACENCODER/DECODER (CXD2536R) Signal Name I / O Description Power supply terminal (+5V) Write data signal input from the system controller (IC201) SWDT Serial clock signal input from the system controller (IC201) Serial latch signal input from the system controller (IC201) XLAT...
  • Page 46 Description Pin. Signal Name IC341) L/R clock signal output to the A/D, D/A converter (IC301, ALRCK Not used this set (open) Address signal output 45-47 SA2—SAO Not used this set (open) Address signal output All, Ground terminal Power supply terminal RAM ac272) Address signal...
  • Page 47 Description Signal Name Pin. Disc drive, Record or playback modeoutput of the EFMencoder/decoder DIRCPB Not used this set (open) Defect ON/OFF selection signal input from CXD2535AR (IC121) IN/OUT selection input terminal of the pin 87 ("L": IN, "H" :OUT) SPOSL Fixed "H"...
  • Page 48 SECTION EXPLODED VIEWS NOTE: • Items marked " * " are not stocked sincethey are The components identified by mark seldomrequiredfor routineservice.Somedelay or dotted line with mark should be anticipated when ordering theseitems. critical for safety. Replace only with patt number •...
  • Page 49 6-2. CHASSIS SECTION TR641 model 1UKmodel MDM-2A supplied not supplied not supplied The components identified by mark Lb or dotted line with mark critical for safety. Replace only with part number specified. Ref. No. Part Descript Remark Ref. No. Part Description Remark 4-886-821-11 SCREW, S TIGHT, +PTTWH 3X8...
  • Page 50 MECHANISM SECTION (MDM-2A) 6-3. 1115> 1181 102N 2 • 103* i—-103 M1911 1134 4126 1 1133 MBU-2 not supplied Ref. No. Part Description Remark Ref. No. Description Part Remark 4-967-672-01 COLLAR(DAMPER) 1-653-412-11 MOTOR BOARD 4-967-671-01 INSULATOR (MI)) A-4660-647-B BRACKET (LVO) ASSY 4-967-673-01 SPRING, COMPRESSION X-4946-378-1...
  • Page 51 BASE UNIT SECTION (MBU-2) 6-4. S102 HR901 1 not supplied notsupplied M 102 supplied MIOI The components identified by mark or dotted line with mark critical for safety. Replace only with part number specified. Remark Ref. No. Part Description Remark Description Ref.
  • Page 52 SECTION ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the parts • SEMICONDUCrORS list may be different from the parts specified in In each case, u: U , for example: The components identified by mark the diagrams or the components used on the set. uA...: VA..., uPA...: uPA..., uPB...: PPB..., or dotted line...
  • Page 53 Remark Description Remark Ref. No. Part Description Ref. No. Part 1/10W 1-216-025-91 METAL GLAZE R124 8-759-243-19 TC7SU04F IC122 MPC17A38VMEL 60 IC IC151 1/10Y 1-216-025-91 METAL GLAZE R125 1/10Y 1-216-053-00 METAL CHIP 1. 5K R128 8-759-504-12 X24C01S lc171 1/10W 1-216-037-00 METAL CHIP R129 uPC842G2 8-759-149-73...
  • Page 54 Ref. No. Part Description Remark Ref.No. Part Descript ion Remark RV105 1-241-395-11 RES, DJ, METALGLAZE10K C304 1-126-204-11 ELECT 47uF C305 1-163-038-91 CERAMIC CHIP O. luF < SWITCH > C306 1-163-038-91 CERAMIC CHIP O. luF C307 1-163-097-00 CERAMIC CHIP 15PF 1-572-467-31 SWITCH,PUSH(1 KEY) (LIMIT SW) SIOI C308 1-163-097-00...
  • Page 55 DIGITAL Remark Ref. No. Part Description Description Remark Ref. No. Part 1,341 1-216-295-91 CONDUCTOR, C HIP 1-163-113-00 CERAMIC CHIP 68PF C415 L344 1-216-295-91 CONDUCTOR, C HIP 1-163-038-91 CERAMIC CHIP O. luF C416 1-412-332-41 INDUCTOR 2. 2uH 1-163-038-91 CERAMIC CHIP L411 C417 1-414-386-11 INDUCTOR, FERRITE BEAD...
  • Page 56 DISPLAY Ref. No. Part Description Remark Ref. No. Part Description Remark R250 1-216-073-00 METAL CHIP 1/10W R402 1-414-386-11 INDUCTOR, FERRITE BEAD R251 1-216-073-00 METAL CHIP 1/10W R411 1-208-810-11 bETAL CHIP 1/10W R252 1-216-073-00 METAL CHIP 1/10* R412 1-208-810-11 METAL CHIP 1/10W R253 1-216-097-91...
  • Page 57 Ref. No. Description Description Part Remark Ref. •NO. Part Remark 1-654-134-11 HP BOARD IC701 8-759-297-23 M66004M8FP IC702 8-741-810-59 ELEMENT, R AY-CATCHER SBX1810-59 < CAPACITOR > < RESISTOR > 1-162-294-31 CERAMIC O. OOIuF C'102 1-162-294-31 CERAMIC O. OOIuF R705 1-249-435-11 CARBON 1/48 C703 1-162-294-31...
  • Page 58 POWER Description Description Remark Ref. No. Part Remark Ref. No. Part c671 1-124-910-11 ELECT 47uP cs03 1-124-572-11 ELECT 100uF C672 1-124-910-11 ELECT 47uP C504 1-165-319-11 CERAMIC CHIP O. luF C673 1-163-038-91 CERAMIC CHIP O. luF C505 1-115-162-21 ELECT 22000uF 1-163-038-91 CERAMIC CHIP O.
  • Page 59 POWER sw [B@] Ref. No. Part Description Remark Ref. No. Description Part Remark L623 1-410-389-31 INDUCTOR CHIP 47uH R606 1-216-166-00 METAL GLAZE 1/8F < LINE FILTER > 1-216-695-11 METAL CHIP 1/10W R612 1-216-695-11 METAL CHIP 1/107 LELF641 1-411-547-11 COIL, LINE FILTER R616 1-216-295-91 CONDUCTOR, CHIP R621...
  • Page 60 MDS-303 Ref. No. Part Description Remark Ref. Part Description Remark < VARIABLE RESISTOR > HARDWARE LIST (RECLEVEL) RV702 1-223-762-11 RES, VAR, CARBON20K/20K 7-682-548-09 SCREW +BVTT3X8 (S) < SWITCH > 7-685-646-79 SCREW+BVTP 3X8 TYPE2 N-s 1-572-624-11 SWITCH,SLIDE (INPUT) S702 7-621-775-20 SCREW +B 2. 6X5...
  • Page 61 MDS-303 SONY Model SERVIC MANUAL I-JK Model SUPPLEMENT-I File this supplement with the service manual. Subject : 1. Correction 2. Parts changed 3. Service note 4. Change of the adjustment specification. 5. Addition to the countermeasure board. 6. Board change.
  • Page 62 Correction • Correct your service manual as shown below. TEST MODE 3-5. Functions of Other keys Page INCORRECT CORRECT Sets continuous playback when pressedin the STOP state. Setscontinuous playback when pressedin the STOP state. When pressed during continuous playback, the tracking When pressed during continuous playback, the tracking servo turns ON/OFF.
  • Page 63 Service note [Note for replacement of IC121 and IC171 on the BD board] IC121 on the BD board of this unit has modified from CXD2535AR to CXD2535BR due to an improvement. Some contents of nonvolatile memory in the IC171 are modified according to this modification. When replacing IC171, the previous contents for IC121 (CXD2535AR) are written as an initialized value from the system control IC.
  • Page 64 Change of the adjustment specifications. The specificationof the previousissued"Service manual SECTION 4. ELECTRICAL ADJUSTMENT" hasbeenchangedasbelow. 2-5. Temperature Compensation Offset Adjustment Page CURRENT REVISED Specifications Specifications The Temperature should be within "TEMP = EO" and The "TEMP *f!" should be within "EO - EF", "FO - FF", "00 IF".
  • Page 65 MDS-303 BOARD) (BD BOARDI CX02S36AR) COUNTERMEASURE 0000000000000000000000000 BOARD evss TEST2 EFHO DIGITAL IC801 XPLCk -rp QLCK) BOARD IC121 CN102— CN202 R8C1 IN CXE2535AR CN103— CN221 Glop (Page 48 ) IC121 VFCK RFCK TP RFCk) SIGNAL PROCESSOR. TP twoco EJGITAL SERVO SIGNAL PROCESSOR.
  • Page 66 MDS-303 Board change BD Board change NOTE:Manycharge o f mounting p arts aredifferent b etween boards w hichhave asuffixNo.-[Ä or laterand whichhave a suffix No.-@or before. Refer t o thissupplement-I forboards w hich have a suffixNo.-E or later. A sforboards w hichhave a suffixNo.-@ or before, refertotheprevious i ssued m anual (9-960-354-11).
  • Page 67 PRINTED WIRING BOARDS — RF SECTION — • Semiconductor Location FLEXIBLE BOARD I Ref. No. Location DIOI 0155 HR901 OPTICAL OVER WRITE PICK -up 0161 HEAD BLOCK 0181 [KMS —210A/J-Nl 0183 I -654- ICIOI D-10 IC102 D-11 IC121 IC122 IC151 G-12 (BD BOARD) (COMPONENT SIDE) (BD BOARD) (CONDUCTOR SIDE)
  • Page 68 MDS-303 SCHEMATIC DIAGRAM — RF SECTION — BOARD) IC181 COER ot ICt21 abd ref« to the service FLEXIBLE BOARD 0.30 1 CAL PICK-UP BLOCK IC172 crus-21 OA/J-N) bJftcn 2-AIXS EVICE E'aga, S:OO TEST 2 EFPC t sas exazsssan •Natt ICIOI cx02555ER •NOTE...
  • Page 69 MDS-303 SCHEMATIC DIAGRAM — DIGITAL SECTION — (DETECTION BOARD J (DIGITAL BOARD Loae a-IT 5191 I WITCH cS44 COV.'ERTER I C302 CONVERTER POSER (Page 26 ) t MOTOR BOARD LUG-WT PLAY 0000000000 00000000000000 0000 IC411 ouoo 00000 s 14.81<4.9 IC431...
  • Page 70 MDS-303 PRINTED WIRING BOARDS — DIGITAL SECTION — • Semiconductor Location (DIGITAL BOARD I (SIDE (CHASSIS) (DIGITAL BOARD (S I DE Ref. NO. Location 0301 czeo 0302 E-15 0303 D341 c-15 0411 IC201 :tzo • 0271 0-10 0272 IC301 D-14...
  • Page 71 MDS-303 PRINTED WIRING BOARDS — DISPLAY/POWER SECTION— Semiconductor Location 20 ) ( D I SPLAY BOARD I DIGITAL BOARD CN2C1 Ref. No. Location 0504 0505 0506 0507 0508 D521 0523 0532 0533 0536 0537 0581 0582 0701 E _15 1-654-133.
  • Page 72 MDS-303 SCHEMATIC DIAGRAM DISPLAY/POWER SECTION — DISPLAY BOARD t POWER BOARD TRACK DISC STEP OATE LEVEL-SYNC -REPEAT IA-B -SYNC UFFLE A.SPACE PROtnAU A.PAUSE ICSI 00000 IC702 00000 (DOC)ooooooooo s;ONAL u. nrs. sys•sv tC701 EOARe eeoetoeoooeeeec.eec.ooeæaeooeoooe€å CN22S FE6•T' eve. A•5V ,iff„...
  • Page 73 ELECTRICAL PARTS LIST NOTE: • SEMICONDUCTORS • Due to standardization, replacementsin the parts list may be different from the parts specified in In each case, u: . for example: When indicating parts by reference the diagrams or the components used on the set. uA...: PA..., uPA...: uPA..., uPB...: UPB..
  • Page 74 Description Description Ref. No. Part Remark Ref. No. Part Remark IC121 8-752-375-36 CXD2535BR * NOTE R122 1-216-295-91 CONDUCTOR, C HIP (2012) IC122 8-759-243-19 TC7SU04F R123 1-216-037-00 METAL CHIP 1/10W IC151 8-759-179-60 MPC17A38VMEL R124 1-216-025-91 METAL GLAZE 1/10W lc171 8-759-504-12 X24C01S * NOTE 1/10Y R125 1-216-025-91...
  • Page 75 Ref. No. Part Description Remark Ref. No. Part Description Remark 1-126-204-11 ELECT < VARIABLE RESISTOR > C314 47uF 1-163-017-00 CERAMICCHIP O. 0047uF C315 1-163-017-00 CERAMIC CHIP RVIOI 1-241-396-11 RES, ADJ, METAL GLAZE 22K C316 O. 0047uF RV102 1-241-396-11 RES, ADJ, METALGLAZE22K C317 1-163-017-00 CERAMIC CHIP...
  • Page 76 DIGITAL Ref. No. Description Ref. No. Part Description Remark Part Remark 1-163-038-91 CERAMIC CHIP O. luF R204 1-216-097-91 METAL GLAZE 100K 1/10W C431 1/108 1-163-038-91 CERAMIC CHIP O. luF R205 1-216-097-91 METAL GLAZE 100K C473 C478 1-163-038-91 CERAMIC CHIP O. luF R206 1-216-073-00 METAL CHIP...
  • Page 77 Description Remark Ref. No. Part Description Remark Ref. No. Part 1/10W R414 1-208-810-11 METAL CHIP 1/10W R255 1-216-097-91 METAL GLAZE 100K 1/10Y 1-216-651-11 METAL CHIP 0.5% 1/10W R256 1-216-097-91 METAL GLAZE 100K R415 R257 1-216-097-91 METAL GLAZE 100K 1/10W R416 1-216-651-11 METAL CHIP 0.5%...
  • Page 78 POWER Ref. No. Part Description Remark Ref. No. Part Description Remark 1-654-136-11 HP BOARD IC701 8-759-297-23 M66004M8FP 8-741-810-59 ELEMENT, RAY-CATCHER SBX1810-59 (R) IC702 < CAPACITOR > < RESISTOR > C701 1-162-294-31 CERAMIC O. OOIuF C702 1-162-294-31 CERAMIC O. OOIuF R705 1-249-435-11 CARBON 1/4W...
  • Page 79 POWER Description Remark Ref. No. Part Description Remark Ref. No. Part C673 1-163-038-91 CERAMIC CHIP O. luF C505 1-115-162-11 ELECT 22000uF 4700uF C674 1-163-038-91 CERAMIC CHIP O. luF C506 1-126-937-11 ELECT 22uF C675 1-124-910-11 ELECT 47uF C507 1-126-965-11 ELECT 1-126-950-11 ELECT 330uF C676...
  • Page 80 POWER Ref. No. Part Description Remark Ref. No. Part Description Remark < COIL > R603 1-216-166-00 METAL GLAZE 1/8W R604 1-216-166-00 METAL GLAZE 1-414-233-21 BEAD, FERRITE(CHIP) L621 R605 1-216-166-00 METAL GLAZE 1/8W 1.623 1-410-389-31 INDUCTOR CHIP 47uH R606 1-216-166-00 METAL GLAZE <...
  • Page 81 Ref. No. Part Description Remark < VARIABLE RESISTOR > 1-223-762-11 RFS, VAR, CARBON 20K/20K (RECLEVEL) RV702 < SWITCH > S702 1-572-624-11 SWITCH, SLIDE (INPUT) MISCELLANEOUS 1-776-015-11 WIRE (FLAT CORE) 1-776-417-11 WIRE (FLAT 1-776-416-11 WIRE (FLAT CORE) ( 100 mm) 1-769-123-11 WIRE (FLAT TYPE)(22 CORE) 1-696-586-21 CORD,POWER (UR) 1-575-651-21 CORD,POWER (AEP) A157...
  • Page 82 MDS-303 EnglISh 95K097555-1 Sony Corporation Printed in Germany Consumer A&V Products Company @ 1995. 11 9-960-354-81 Home A&V Products Div. Published by Home A&V Products Div. Quality Engineering Dept.
  • Page 83 MDS-303 SONY Model UK Mode/ SERVIC MANUAL SUPPLEMENT-2 File this supplement with the service manual. Subject : 1. CORRECTION 2. CHANGE OF OVER WRITE HEAD 3. PARTS CHANGED 4. CHANGE OF MECHANISM DECK (ECN-CD600402) 1. CORRECTION • Correct your service manual as shown.below.
  • Page 84 : Indicates corrected portion Page INCORRECT CORRECT Ref No. Part No. Description Remark Ref No. Part No. Description Remark EXPLODED VIEWS *** *** EXPLODED VIEWS *** 4-967-664-05 SPRING, TENSION not supplied 1134 MBU-2 MBU-2 not supplied not supplied SCREW +BVTT 7-685-862-09 SCREW+8VTT2.6x4 (S) 7-685-860-09...
  • Page 85 CHANGE OVER WRITE HEAD The over write head has changed. According to this change, the service form will be changed, so refer to How to discriminate (Over write head). How to discriminate (Over write head) FORMER TYPE TYPE HR901 HR901 HR901 (1-500-175-21) (1-500-304-21)
  • Page 86 Difference table Page TYPE FORMER TYPE : A, 4-6 Location : A, 4-6 Location HR901 ( OWH BOARD ) FLEXIBLE OVER WRITE HEAD H R 901 OVER WRITE HEAD 446 — (11) Location Location : B-c, 2-4 FLEX I BLE BOARD CNIO' I CAL...
  • Page 87 4. CHANGE OF MECHANISM DECK The mechanism deck has been changed from MDM-2A to MDM-2AR. Refer to How to discriminate (Mechanism deck) so that there is no interchangeability between MDM-2A and MDM-2AR. How to discriminate (Mechanism deck) FORMER TYPE (MDM-2A) NEW TYPE (MDM-2AR) Screw Stopper washer...
  • Page 88 MDS-303 NOTE: • Items marked " * " are not stocked since they are • The mechanical parts with no reference number seldom required for routine service. Some delay in the explodedviews are not supplied. should be anticipated when ordering these items.