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COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
C13/REC Error the deck needs in order to operate. fingerprints, etc.), scratched, or MEMORY NG , Consult your nearest Sony dealer. substandard in quality. , Replace the disc and repeat the There is a problem with the optical recording procedure.
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MDS-JE480 3 7 63 1515 0 1. While pressing the lAMSL knob and x button, connect the power plug to the outlet, and release the lAMSL knob and x button. When the test mode is set, “[Check]” will be displayed.
MDS-JE480 Ver. 1.3 3 7 63 1515 0 Display History spdl change Mode for erasing the total spdl rp tm time These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced, perform this procedure and erase the history.
MDS-JE480 SECTION 1 3 7 63 1515 0 SERVICE NOTES JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows.
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MDS-JE480 3 7 63 1515 0 Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up.
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MDS-JE480 3 7 63 1515 0 OPTICAL PICK-UP BLOCK TYPE DISCRIMINATION There are two types of the optical pick-up block in this model. These are compatible except for the laser power. Check the type of the optical pick-up block before replacement.
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MDS-JE480 3 7 63 1515 0 CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.
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MDS-JE480 3 7 63 1515 0 RETRY CAUSE DISPLAY MODE • In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set.
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MDS-JE480 3 7 63 1515 0 Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 42 is displayed: Higher bit : 4 = 0100 t b6 Lower bit : 2 = 0010 t b1 In this case, the retry cause is combined of “CLV unlock”...
MDS-JE480 SECTION 3 3 7 63 1515 0 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW 3-2 UPPER CASE (408226) 3-6 MECHANISM DECK 3-3 FRONT PANEL 3-5 PT BOARD 3-4 MAIN BOARD...
MDS-JE480 3 7 63 1515 0 3-6. MECHANISM DECK SECTION (MDM-7S1A) 3 Mechanism deck (MDM-7S1A) 2 Two step screws (+BVTTWH M3) 2 Two step screws (+BVTTWH M3) 1 Lead with connector L 13942296513 3-7. OVER LIGHT HEAD (HR901), BD BOARD Note 1: If you disconnect the connector (CN104), you can remove the BD board without removing the over write head (HR901).
MDS-JE480 SECTION 4 TEST MODE 3 7 63 1515 0 4-1. PRECAUTIONS FOR USE OF TEST MODE • As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it.
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MDS-JE480 3 7 63 1515 0 4-5. SELECTING THE TEST MODE There are 25 types of test modes as shown below. The groups can be switched by rotating the l AMS L knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the l AMS L knob switches between these modes.
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MDS-JE480 3 7 63 1515 0 4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the l AMS L knob and display “CPLAY1 MODE”(C34).
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MDS-JE480 3 7 63 1515 0 4-6. FUNCTIONS OF OTHER BUTTONS Function Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed.
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MDS-JE480 3 7 63 1515 0 4-8. MEANINGS OF OTHER DISPLAYS Contents Display When Lit When Off Servo ON Servo OFF Tracking servo OFF Tracking servo ON Recording mode ON Recording mode OFF SYNC CLV low speed mode CLV normal mode L.SYNC...
MDS-JE480 SECTION 5 ELECTRICAL ADJUSTMENTS 3 7 63 1515 0 Note : 260B: KMS-260B 260E: KMS-260E 5-1. PARTS REPLACEMENT AND ADJUSTMENT If malfunctions caused by Optical pick-up such as sound skipping are suspected, follow the following check. Check before replacement Start 5-6-2.
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MDS-JE480 3 7 63 1515 0 Adjustment flow • Abbreviation Start OP: Optical pick-up After turning off and then on the power, initialize the EEPROM Replace IC195 For details, refer to 4-11. WHEN MEMORY NG IS DISPLAYED (See page 24) 5-7.
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MDS-JE480 3 7 63 1515 0 5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight. 5-3. PRECAUTIONS FOR USE OF OPTICAL PICK-...
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MDS-JE480 3 7 63 1515 0 5-5. USING THE CONTINUOUSLY RECORDED DISC Checking Procedure: 1. Set the laser power meter on the objective lens of the optical * This disc is used in focus bias adjustment and error rate check.
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MDS-JE480 3 7 63 1515 0 5-6-4. Auto Check 6. Observe the waveform of the oscilloscope, and check that the This test mode performs CREC and CPLAY automatically for specified value is satisfied. Do not rotate the AMS knob.
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MDS-JE480 3 7 63 1515 0 16. Observe the waveform of the oscilloscope, and check that the 5-6-8. C PLAY Check specified value is satisfied. Do not rotate the l AMS L MO Error Rate Check knob. Checking Procedure : (Traverse Waveform) 1.
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MDS-JE480 3 7 63 1515 0 5-7. INITIAL SETTING OF ADJUSTMENT VALUE 5-9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT Note: Save the temperature data at that time in the non-volatile memory Mode which sets the adjustment results recorded in the non-vola- as 25 ˚C reference data.
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MDS-JE480 3 7 63 1515 0 7. Then, rotate the l AMS L knob and display “LDPWR 5-12. TRAVERSE ADJUSTMENT CHECK”. Connection : 8. Press the YES button once and display “L 0.93 mW $ ”. Oscilloscope Check that the reading of the laser power meter become the speci- fied value.
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MDS-JE480 3 7 63 1515 0 11. Rotate the l AMS L knob until the waveform of the 5-13. FOCUS BIAS ADJUSTMENT oscilloscope moves closer to the specified value. Adjusting Procedure : In this adjustment, waveform varies at intervals of approx. 2%.
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MDS-JE480 3 7 63 1515 0 5-14. ERROR RATE CHECK 5-16. AUTO GAIN CONTROL OUTPUT LEVEL 5-14-1. CD Error Rate Check ADJUSTMENT Checking Procedure : Be sure to perform this adjustment when the Optical pick-up is re- 1. Load a check disc (MD) TDYS-1.
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MDS-JE480 3 7 63 1515 0 5-17. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (SIDE A) D101 CN101 L 13942296513 [BD BOARD] (SIDE B) IC101 IC701 CN105 IC201 IC933 IC195 CN103 CN102 NOTE:It is useful to use the jig. for checking the waveform. (Refer u163 to Servicing Note on page 6.)
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MDS-JE480 3 7 6 3 1 5 1 5 0 • WAVEFORMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. – BD Board – – MAIN Board – (In addition to this, the necessary note is printed in each block.)
MDS-JE480 3 7 63 1515 0 6-13. IC PIN FUNCTION DESCRIPTION • IC101 CXA2523AR RF Amplifier (BD BOARD) Pin No. Pin Name Description I-V converted RF signal I input I-V converted RF signal J input Middle point voltage generation output...
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MDS-JE480 3 7 63 1515 0 • IC201 CXD2664R Digital Signal Processor, Digital Servo Signal Processor (BD BOARD) Pin No. Pin Name Desription Not used (open) MNT0 (FOK) Track jump detection signal output to the system control MNT1 (SHCK)
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MDS-JE480 3 7 63 1515 0 Pin No. Pin Name Description XCAS CAS signal output for DRAM XRAS RAS signal output for DRAM DRAM address output Not used (Open) DRAM address output VDC2 Power supply — Ground VSC2 —...
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MDS-JE480 3 7 63 1515 0 Pin No. Pin Name Description VDIO1 — Power supply VSIO1 — Ground Filter f0 control output to the CXA2523AR F0CNT Power supply VDC3 — Ground VSC3 — Control latch output to the CXA2523AR...
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MDS-JE480 3 7 63 1515 0 • IC1 M30622MGN-373FP SYSTEM CONTROL (MAIN BOARD) Pin No. Pin Name Description FLDT Serial data output to the display driver FLCK Serial clock signal output to the display driver. L: Active A1-IN A1 Control input (Not used) (Open)
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MDS-JE480 3 7 63 1515 0 Pin No. Pin Name Description OUT-SW Detection signal input from the loading out detection switch XLATCH Latch signal output to the serial bus PLAY-SW Detection signal input from the playback position detection switch L: PLAY...
MDS-JE480 SECTION 7 Ver. 1.4 EXPLODED VIEWS 3 7 63 1515 0 NOTE: • -XX, -X mean standardized parts, so they may • Color indication of Appearance Parts have some differences from the original one. Example : The components identified by mark 0 or dotted line with mark 0 are critical for safety.
MDS-JE480 3 7 63 1515 0 7-4. MECHANISM SECTION-2 (MDM-7S1A) HR901 S102 M101 M102 L 13942296513 M103 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
MDS-JE480 Ver. 1.3 SECTION 8 ELECTRICAL PARTS LIST 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks NOTE: • Due to standardization, replacements in the • COILS When indicating parts by reference number, uH: µH...
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MDS-JE480 3 7 63 1515 0 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page.
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