Manuals / Sony / Home Audio / MiniDisc Player

Sony MDS-JE770 MECHANISM DECK SECTION MDM-7A, OVER LIGHT HEAD HR901, BD BOARD, Two screws BTP2X6

Models: MDS-JE770

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MDS-JE770

3-6. MECHANISM DECK SECTION (MDM-7A)

3 Mechanism deck

2Two step screws (+BVTTWH M3)

2 Two step screws (+BVTTWH M3)

1 Harness

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).

Note 2: Be careful to handle the over write head (HR901) because it is easy to be damaged.

3 Head, over light (HP901)

4Remove the solder (four portion)

2Screw (P1.7X6)

8BD board

61 Connector (CN104)

4 Remove the solder (five portion)	7 FLEXIBLE board (CN101)
	5 Two screws (BTP2X6)

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Sony MDS-JE770 MECHANISM DECK SECTION MDM-7A, OVER LIGHT HEAD HR901, BD BOARD, Remove the solder five portion

Contents

SPECIFICATIONS 9-873-890-11MDS-JE770 MINIDISC DECKGenera l Power requirements Supplied accessoriesMDS-JE770 SELF-DIAGNOSISFUNCTIONSelecting the Test Mode ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTSMDS-JE770 TABLE OF CONTENTS 3. DISASSEMBLY6. DIAGRAMS Table of Error CodesMDS-JE770 SECTION SERVICE NOTES Notes on chip component replacementFlexible Circuit Board Repairing NOTES ON LASER DIODE EMISSION CHECKJIG FOR CHECKING BD BOARD WAVEFORM MDS-JE770Display Precedure Record PrecedureMDS-JE770 OPTICAL PICK-UPBLOCK TYPE DISCRIMINATION MDS-JE770KSN-260B KSN-260ECHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS FORCED RESETProcedure @CN406Procedure RETRY CAUSE DISPLAY MODEMDS-JE770 Reading the Display MDS-JE770Reading the Display Hexadecimal t Binary Conversion TableMDS-JE770 SECTION GENERAL BUTTON DESCRIPTIONSMain unit Parts IdentificationMDS-JE770 SECTION DISASSEMBLY 3-1.DISASSEMBLY FLOW3-2.UPPER CASE 3-3.FRONT PANEL SECTION3Connector CN830 2 Connector CN390 1Wire flat type 17core CN3 5Claw3-4.MAIN BOARD 3-5.PT BOARD, VOL-SELBOARD SP model3 Connector CN400 2 Wire flat type 23core CN1 1 Wire flat type 27core CN2 7 MAIN board3-6.MECHANISM DECK SECTION MDM-7A 3-7.OVER LIGHT HEAD HR901, BD BOARDMDS-JE770 4 Remove the solder five portion3-8.HOLDER ASSY 3-9.LOADING MOTOR ASSY M103MDS-JE770 2 Claw3-10.SLED MOTOR ASSY M102, SLIDER 3-11.OPTICAL PICK-UPMDS-JE770 5 Remove the claw Shift the slider in the arrow3-12.SPINDLE MOTER ASSY M101 MDS-JE7702Spindle motor ASSY M101 1 Three screws M1.7, tapping4-1.PRECAUTIONS FOR USE OF TEST MODE 4-2.SETTING THE TEST MODEMDS-JE770 SECTION TEST MODE 4-3.EXITING THE TEST MODE4-5.SELECTING THE TEST MODE MDS-JE770Display Group4-5-1.Operating the Continuous Playback Mode MDS-JE7702. Error rate display 4-6.FUNCTIONS OF OTHER BUTTONS4-7.TEST MODE DISPLAYS 1. Mode display4-11.WHEN MEMORY NG IS DISPLAYED 4-8.MEANINGS OF OTHER DISPLAYS4-9.AUTOMATIC SELF-DIAGNOSISFUNCTION 4-10.INFORMATION5-1.PARTS REPLACEMENT AND ADJUSTMENT MDS-JE770 SECTION ELECTRICAL ADJUSTMENTSCheck before replacement Adjustment flow MDS-JE7705-2.PRECAUTIONS FOR CHECKING LASER DIODE EMISSION 5-4.PRECAUTIONS FOR ADJUSTMENTSMDS-JE770 Optical pick-upflexible board5-5.USING THE CONTINUOUSLY RECORDED DISC 5-6-1.Temperature Compensation Offset CheckChecking Procedure 5-6-2.Laser Power Check5-6-4.Auto Check 5-6-5.Other Checks5-6-6.Traverse Check Procedure5-6-8.C PLAY Check MO Error Rate Check CD Error Rate Check5-6-7.Focus Bias Check 5-6-9. Self-Recording/playbackCheck5-7.INITIAL SETTING OF ADJUSTMENT VALUE 5-9.TEMPERATURE COMPENSATION OFFSET ADJUTMENT5-10.LASER POWER ADJUSTMENT Setting Procedure5-12.TRAVERSE ADJUSTMENT 5-11.Iop NV SAVEProcedure Adjusting ProcedureAdjusting Procedure 5-13.FOCUS BIAS ADJUSTMENTMDS-JE770 5-14.ERROR RATE CHECK 5-16.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT5-14-1.CD Error Rate Check 5-14-2.MO Error Rate Check5-17.ADJUSTING POINTS AND CONNECTING POINTS BD BOARD SIDE ABD BOARD SIDE B MDS-JE770MDS-JE770 SECTION DIAGRAMS 6-1.CIRCUIT BOARDS LOCATIONPT board KEY-SWboard MAIN board HP board KB boardFor schematic diagrams For printed wiring boardsWAVEFORMS -BD Board MAIN Board6-2.BLOCK DIAGRAMS - BD SECTION MDS-JE770IC171 IC190MAIN SECTION IC310IC550 IC740Location PageSemiconductorOVER SemiconductorBD BOARD 2/2 Page BD BOARD 2/2 Page BD BOARD 2/2 MDS-JE770Page KMS - 260B/260EBOARD MDS-JE770MDS-JE770 Page44MDS-JE770 IC440MDS-JE770 SemiconductorLocation Location MDS-JE770Semiconductor 4747 6-10.SCHEMATIC DIAGRAM - DISPLAY SECTIONMDS-JE770 PT BOARD MDS-JE770BOARD VOL-SEL6-12.SCHEMATIC DIAGRAM - POWER SECTION 4949MDS-JE770 MAIN BOARD 2/2 CN400 Page6-13.IC BLOCK DIAGRAMS IC101 CXA2523AR BD BOARDIC151 CXD2662R BD BOARD IC141IC500 AK4524 MAIN BOARD IC440 M54641L MAIN BOARDIC421 M5293L MAIN BOARD MDS-JE770IC101 CXA2523AR RF Amplifier BD BOARD 6-14.IC PIN FUNCTION DESCRIPTIONMDS-JE770 MDS-JE770 Pin NoPin Name DesriptionPLL Phase Locked Loop MDS-JE770Abbreviation EFM Eight to Fourteen Modulation VCO Voltage Controlled OscillatorMDS-JE770 TFDRIC1 M30803MG-106FPSYSTEM CONTROL MAIN BOARD MDS-JE770Pin No Pin NameMDS-JE770 ADA. LATCHMDS-JE770 BEEP SWIC760 MSM9201-04GS-KFL DRIVER DISPLAY BOARD MDS-JE7707-1.CHASSIS SECTION SECTION EXPLODED VIEWSMDS-JE770 7-2.FRONT PANEL SECTION MDS-JE770not supplied supplied with J7907-3.MECHANISM SECTION-1 MDM-7A MDS-JE770312 313S102 HR901M103 MDS-JE770SECTION ELECTRICAL PARTS LISTMDS-JE770 MDS-JE770 Ref. NoMDS-JE770 DISPLAY HP KB KEY-SW MAIN KEY-SWMDS-JE770 MDS-JE770 MAIN MDS-JE770 MAIN Q490MDS-JE770 MAIN PT VOL-SELMEMO MDS-JE770MDS-JE770 REVISION HISTORY DateDescription of Revision 2001.05

3-6. MECHANISM DECK SECTION (MDM-7A)

3-7. OVER LIGHT HEAD (HR901), BD BOARD

4 Remove the solder (five portion)

7 FLEXIBLE board (CN101)

5 Two screws (BTP2X6)