Sony KMS-2608/J1N User Manual

Page of 64
MDS-JE440
SPECIFICATIONS
SERVICE MANUAL
MINIDISC DECK
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MDM-7A
Optical Pick-up Type
KMS-260B/J1N
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
US and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Inputs
Outputs
System
MiniDisc digital audio system
Disc
MiniDisc
Laser
Semiconductor laser (
λ = 780 nm) 
Emission duration:  continuous
Laser output 
MAX 44.6 
µW
1)
1) This output is the value 
measured at a distance of 
200 mm from the objective lens 
surface on the Optical Pick-up 
Block with 7 mm aperture.
Laser diode 
Material: GaAlAs
Revolutions (CLV)
400 rpm to 900 rpm 
Error correction 
ACIRC (Advanced Cross Interleave 
Reed Solomon Code)
Sampling frequency 
44.1 kHz
Coding
ATRAC (Adaptive TRansform 
Acoustic Coding)/ATRAC 3
Modulation system
EFM (Eight-to-Fourteen 
Modulation)
Number of channels 
2 stereo channels
Frequency response 
5 to 20,000 Hz 
±0.3 dB
Signal-to-noiseratio 
Over 96 dB during play
Wow and flutter  
Below measurable limit
ANALOG IN 
Jack type:  phono
Impedance:  47 k
Ω
Rated input:  500 mVrms 
Minimum input:  125 mVrms
DIGITAL IN
Connector type:  square optical
Impedance:  660 nm (optical wave 
length)
ANALOG OUT
Jack type:  phono
Rated output:  2 Vrms (at 50 
k
Ω)
Load impedance:  over 10 k
Ω
DIGITAL OUT
Connector type:  square optical
Rated output:  –18 dBm
Load impedance:  660 nm (optical 
wave length)
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Summary of Contents of user manual for Sony KMS-2608/J1N

  • Page 1: COVER MDS-JE440 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model Australian Model US and foreign patents...
  • Page 2General Supplied accessories Power requirements • Audio connecting cords (2) Where purchas ed Power requir ements • Optical cable (1)...
  • Page 31. While pressing the AMS knob and x button, connect the power plug to the outlet, and release the AMS...
  • Page 4Table of Error Codes TABLE OF CONTENTS Error Code Description 1. SERVICING NOTES ............................................. 5 10 Could not load 12...
  • Page 5: SERVICE NOTES SECTION 1 SERVICE NOTES SAFETY CHECK-OUT NOTES ON HANDLING THE OPTICAL PICK-UP (US model only) BLOCK OR BASE UNIT...
  • Page 6JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-196-A) is useful for checking the waveform of the BD board....
  • Page 7Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED The Iop value...
  • Page 8CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS Before performing repairs, perform the following checks to determine the faulty locations up...
  • Page 9RETRY CAUSE DISPLAY MODE • In this test mode, the causes for retry of the unit during recording can be...
  • Page 10Reading the Track Mode Display Higher Bits Lower Bits Hexa- Details Hexadecimal 8 4 2 1 8 4 2 1...
  • Page 11: GENERAL SECTION 2 GENERAL 12 3 4 5 6 7 8 9 0 qa qs qd w; ql qkqj qhqgqf...
  • Page 12: DISASSEMBLY SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. UPPER CASE (408226) 1...
  • Page 133-3. MAIN BOARD 3 connector (CN902) 2 wire (flat type) (23core) 6 screw (CN400) 1 wire (flat type) (27core) (BVTP3...
  • Page 143-5. MECHANISM DECK SECTION (MDM-7A) 2 four step screws (BVTTWH M3) 4 mechanism deck 1 harness 3 3-6. BD BOARD...
  • Page 15: TEST MODE SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE • As loading related operations will be performed...
  • Page 164-5. SELECTING THE TEST MODE There are 25 types of test modes as shown below. The groups can be switched...
  • Page 174-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever...
  • Page 184-6. FUNCTIONS OF OTHER BUTTONS Function Contents G Sets continuous playback when pressed in the STOP state. When pressed during...
  • Page 194-8. MEANINGS OF OTHER DISPLAYS Contents Display When Lit When Off G Servo ON Servo OFF X Tracking servo OFF...
  • Page 20: ELECTRICAL ADJUSTMENTS SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. PARTS REPLACEMENT AND ADJUSTMENT If malfunctions caused by Optical pick-up such as sound skipping...
  • Page 21Adjustment flow Start • Abbreviation OP: Optical pick-up After turning off and then on the power, YES initialize the EEPROM...
  • Page 225-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION To check the emission of the laser diode during adjustments, never view directly...
  • Page 235-5. USING THE CONTINUOUSLY RECORDED DISC Checking Procedure: * This disc is used in focus bias adjustment and error rate...
  • Page 245-6-4. Auto Check 6. Observe the waveform of the oscilloscope, and check that the This test mode performs C-REC and...
  • Page 2516. Observe the waveform of the oscilloscope, and check that the 5-6-8. C PLAY Check specified value is satisfied. Do...
  • Page 265-7. INITIAL SETTING OF ADJUSTMENT VALUE 5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT Note: Save the temperature data at that time in...
  • Page 277. Then, rotate the AMS knob and display “LDPWR CHECK”. 5-12. TRAVERSE ADJUSTMENT 8. Press the YES button once and...
  • Page 2811. Rotate the AMS knob until the waveform of the oscilloscope 5-13. FOCUS BIAS ADJUSTMENT moves closer to the specified...
  • Page 295-14. ERROR RATE CHECK 5-16. AUTO GAIN CONTROL OUTPUT LEVEL 5-14-1. CD Error Rate Check ADJUSTMENT Checking Procedure : Be...
  • Page 305-17. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (SIDE A) CN101 D101 [BD BOARD] (SIDE B) IC101 CN105 1 IC102...
  • Page 31: DIAGRAMS SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING • Indication of transistor BOARDS...
  • Page 32MDS-JE440 6-2. BLOCK DIAGRAMS – BD SECTION – DIGITAL SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, 15 ATRAC ENCODER/DECODER...
  • Page 33 MDS-JE440 – MAIN SECTION – A/D, D/A CONVERTER IC500 • SIGNAL PATH J150 : PLAY (ANALOG OUT) HIGH-PASS FILTER,...
  • Page 34• WAVEFORMS – BD Board – – MAIN Board – – DISPLAY Board – 1 IC101 ek (RF) 1 IC1...
  • Page 35 MDS-JE440 6-3. PRINTED WIRING BOARD – BD SECTION – • Semiconductor • Semiconductor Location Location Ref. No. Location Ref....
  • Page 36MDS-JE440 6-4. SCHEMATIC DIAGRAM – BD SECTION (1/2) – • See page 34 for Waveforms. • See page 46 for...
  • Page 37 MDS-JE440 6-5. SCHEMATIC DIAGRAM – BD SECTION (2/2) – • See page 34 for Waveforms. • See page 46...
  • Page 38MDS-JE440 6-6. PRINTED WIRING BOARD – MAIN SECTION (SIDE A) – • Semiconductor Location Ref. No. Location Ref. No. Location...
  • Page 39 MDS-JE440 6-7. PRINTED WIRING BOARD – MAIN SECTION (SIDE B) – • Semiconductor Location Ref. No. Location Ref. No....
  • Page 40MDS-JE440 6-8. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) – • See page 34 for Waveforms. • See page 52 for...
  • Page 41 MDS-JE440 6-9. SCHEMATIC DIAGRAM – MAIN SECTION (2/3) – • See page 34 for Waveforms. • See page 47...
  • Page 42MDS-JE440 6-10. SCHEMATIC DIAGRAM – MAIN SECTION (3/3) – • See page 47 for IC Block Diagrams. 42 42
  • Page 43 MDS-JE440 6-11. PRINTED WIRING BOARD – POWER SECTION – 43 43
  • Page 44MDS-JE440 6-12. PRINTED WIRING BOARD – DISPLAY SECTION – 44 44
  • Page 45 MDS-JE440 6-13. SCHEMATIC DIAGRAM – DISPLAY SECTION – • See page 34 for Waveforms. 45 45
  • Page 466-14. IC BLOCK DIAGRAMS IC151 CXD2662R (BD BOARD) APCREF F0CNT TEST3 TEST2 TEST1 TEST0 SRDR DVDD DCHG EFMO SPRD TRDR...
  • Page 47 IC400 LA5643 (MAIN BOARD) + - DELAY RESET CIRCUIT + - VREF2 VREF1 + + + - - -...
  • Page 486-15. IC PIN FUNCTIONS • IC101 CXA2523AR RF Amplifier (BD BOARD) Pin No. Pin Name I/O Function 1 I I...
  • Page 49• IC151 CXD2662R Digital Signal Processor, Digital Servo Signal Processor (BD BOARD) Pin No. Pin Name I/O Function FOK signal...
  • Page 50 Pin No. Pin Name I/O Function 48 D1 I/O 49 D0 I/O Data input/output for DRAM 50, 51 D2,...
  • Page 51 Pin No. Pin Name I/O Function 86 TFDR O Tracking servo drive PWM output (+) 87 DVDD — +3V...
  • Page 52• IC1 M30805SGP SYSTEM CONTROL (MAIN BOARD) Pin No. Pin Name I/O Function 1 DATA(FL) O Serial data signal output...
  • Page 53 Pin No. Pin Name I/O Function 55 HLDA/ALE O Microprocessor mode output. (Not used.) 56 MNT2 (XBUSY) I In the...
  • Page 54: EXPLODED VIEWS SECTION 7 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • Hardware (# mark) list...
  • Page 557-2. FRONT PANEL SECTION 57 62 57 57 64 63 58 60 FL771 not supplied 57 57 65 61 56...
  • Page 567-3. MECHANISM SECTION-1 (MDM-7A) 212 213 211 214 210 215 209 216 205 not 217 supplied 204 203 218 208...
  • Page 577-4. MECHANISM SECTION-2 (MDM-7A) 259 HR901 258 260 256 264 265 257 #3 262 #3 255 259 254 262 253...
  • Page 58: ELECTRICAL PARTS LIST SECTION 8 BD ELECTRICAL PARTS LIST NOTE: Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks...
  • Page 59 BD Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks IC153 8-759-671-27 IC MSM51V4400E-70TS-K R111 1-216-833-91...
  • Page 60 BD DISPLAY KEY-SW Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < SWITCH > R714 1-249-425-11...
  • Page 61 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks A-4725-161-A MAIN BOARD, COMPLETE (US,CND) C410...
  • Page 62 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks D432 8-719-016-74 DIODE 1SS352-TPH3 R43 1-216-833-91 RES-CHIP...
  • Page 63 MAIN PT VOL-SEL Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 0 R301 1-219-786-11 FUSIBLE...
  • Page 64MDS-JE440 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks MISCELLANEOUS *************** 8 1-792-812-11 WIRE (FLAT TYPE)...