Manuals / Sony / Home Audio / MiniDisc Player

Sony MDS-JE770 specifications Main Board, PT BOARD, VOL-SELBOARD SP model, Two screws, +BVTP3x8

Models: MDS-JE770

1 72

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MDS-JE770

3-4. MAIN BOARD	6 Two screws
	(+BVTP3x8)

3 Connector (CN400)

2 Wire (flat type) (23core) (CN1)

1 Wire (flat type) (27core) (CN2)

7 MAIN board

4 Three screws (+BVTP3x8)

5 screw (+BVTP3x8)

3-5. PT BOARD, VOL-SEL BOARD (SP model)

3 Three screws (+PTTWH M3)

5PT board

1Connector (CN900)

2Connector (CN990) (SP model)

7VOL-SEL board (SP model)

4Nylom rivet (dia 3)

6Two screws (+BVTP3x8) (SP model)

Page 15

Image 15

Sony MDS-JE770 Main Board, PT BOARD, VOL-SELBOARD SP model, Two screws, Connector CN400 2 Wire flat type 23core CN1

Contents

MINIDISC DECK SPECIFICATIONS9-873-890-11 MDS-JE770SELF-DIAGNOSISFUNCTION Genera l Power requirementsSupplied accessories MDS-JE770ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS Selecting the Test ModeMDS-JE770 Table of Error Codes TABLE OF CONTENTS3. DISASSEMBLY 6. DIAGRAMSNOTES ON LASER DIODE EMISSION CHECK MDS-JE770 SECTION SERVICE NOTESNotes on chip component replacement Flexible Circuit Board RepairingMDS-JE770 JIG FOR CHECKING BD BOARD WAVEFORMRecord Precedure Display PrecedureMDS-JE770 KSN-260E OPTICAL PICK-UPBLOCK TYPE DISCRIMINATIONMDS-JE770 KSN-260B@CN406 CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSFORCED RESET ProcedureRETRY CAUSE DISPLAY MODE ProcedureMDS-JE770 Hexadecimal t Binary Conversion Table Reading the DisplayMDS-JE770 Reading the DisplayParts Identification MDS-JE770 SECTION GENERALBUTTON DESCRIPTIONS Main unit3-1.DISASSEMBLY FLOW MDS-JE770 SECTION DISASSEMBLY1Wire flat type 17core CN3 5Claw 3-2.UPPER CASE3-3.FRONT PANEL SECTION 3Connector CN830 2 Connector CN3901 Wire flat type 27core CN2 7 MAIN board 3-4.MAIN BOARD3-5.PT BOARD, VOL-SELBOARD SP model 3 Connector CN400 2 Wire flat type 23core CN14 Remove the solder five portion 3-6.MECHANISM DECK SECTION MDM-7A3-7.OVER LIGHT HEAD HR901, BD BOARD MDS-JE7702 Claw 3-8.HOLDER ASSY3-9.LOADING MOTOR ASSY M103 MDS-JE7705 Remove the claw Shift the slider in the arrow 3-10.SLED MOTOR ASSY M102, SLIDER3-11.OPTICAL PICK-UP MDS-JE7701 Three screws M1.7, tapping 3-12.SPINDLE MOTER ASSY M101MDS-JE770 2Spindle motor ASSY M1014-3.EXITING THE TEST MODE 4-1.PRECAUTIONS FOR USE OF TEST MODE4-2.SETTING THE TEST MODE MDS-JE770 SECTION TEST MODEGroup 4-5.SELECTING THE TEST MODEMDS-JE770 DisplayMDS-JE770 4-5-1.Operating the Continuous Playback Mode1. Mode display 2. Error rate display4-6.FUNCTIONS OF OTHER BUTTONS 4-7.TEST MODE DISPLAYS4-10.INFORMATION 4-11.WHEN MEMORY NG IS DISPLAYED4-8.MEANINGS OF OTHER DISPLAYS 4-9.AUTOMATIC SELF-DIAGNOSISFUNCTIONMDS-JE770 SECTION ELECTRICAL ADJUSTMENTS 5-1.PARTS REPLACEMENT AND ADJUSTMENTCheck before replacement MDS-JE770 Adjustment flowOptical pick-upflexible board 5-2.PRECAUTIONS FOR CHECKING LASER DIODE EMISSION5-4.PRECAUTIONS FOR ADJUSTMENTS MDS-JE7705-6-2.Laser Power Check 5-5.USING THE CONTINUOUSLY RECORDED DISC5-6-1.Temperature Compensation Offset Check Checking ProcedureProcedure 5-6-4.Auto Check5-6-5.Other Checks 5-6-6.Traverse Check5-6-9. Self-Recording/playbackCheck 5-6-8.C PLAY Check MO Error Rate CheckCD Error Rate Check 5-6-7.Focus Bias CheckSetting Procedure 5-7.INITIAL SETTING OF ADJUSTMENT VALUE5-9.TEMPERATURE COMPENSATION OFFSET ADJUTMENT 5-10.LASER POWER ADJUSTMENTAdjusting Procedure 5-12.TRAVERSE ADJUSTMENT5-11.Iop NV SAVE Procedure5-13.FOCUS BIAS ADJUSTMENT Adjusting ProcedureMDS-JE770 5-14-2.MO Error Rate Check 5-14.ERROR RATE CHECK5-16.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 5-14-1.CD Error Rate CheckMDS-JE770 5-17.ADJUSTING POINTS AND CONNECTING POINTSBD BOARD SIDE A BD BOARD SIDE BKEY-SWboard MAIN board HP board KB board MDS-JE770 SECTION DIAGRAMS6-1.CIRCUIT BOARDS LOCATION PT boardMAIN Board For schematic diagramsFor printed wiring boards WAVEFORMS -BD BoardIC190 6-2.BLOCK DIAGRAMS - BD SECTIONMDS-JE770 IC171IC740 MAIN SECTIONIC310 IC550Semiconductor LocationPage SemiconductorOVERKMS - 260B/260E BD BOARD 2/2 Page BD BOARD 2/2 Page BD BOARD 2/2MDS-JE770 PageMDS-JE770 BOARDPage44 MDS-JE770IC440 MDS-JE770Semiconductor MDS-JE770Location MDS-JE770 LocationSemiconductor 6-10.SCHEMATIC DIAGRAM - DISPLAY SECTION 4747MDS-JE770 VOL-SEL PT BOARDMDS-JE770 BOARDMAIN BOARD 2/2 CN400 Page 6-12.SCHEMATIC DIAGRAM - POWER SECTION4949 MDS-JE770IC141 6-13.IC BLOCK DIAGRAMSIC101 CXA2523AR BD BOARD IC151 CXD2662R BD BOARDMDS-JE770 IC500 AK4524 MAIN BOARDIC440 M54641L MAIN BOARD IC421 M5293L MAIN BOARD6-14.IC PIN FUNCTION DESCRIPTION IC101 CXA2523AR RF Amplifier BD BOARDMDS-JE770 Desription MDS-JE770Pin No Pin NameVCO Voltage Controlled Oscillator PLL Phase Locked LoopMDS-JE770 Abbreviation EFM Eight to Fourteen ModulationTFDR MDS-JE770Pin Name IC1 M30803MG-106FPSYSTEM CONTROL MAIN BOARDMDS-JE770 Pin NoADA. LATCH MDS-JE770BEEP SW MDS-JE770MDS-JE770 IC760 MSM9201-04GS-KFL DRIVER DISPLAY BOARDSECTION EXPLODED VIEWS 7-1.CHASSIS SECTIONMDS-JE770 supplied with J790 7-2.FRONT PANEL SECTIONMDS-JE770 not supplied313 7-3.MECHANISM SECTION-1 MDM-7AMDS-JE770 312MDS-JE770 S102HR901 M103ELECTRICAL PARTS LIST SECTIONMDS-JE770 Ref. No MDS-JE770MDS-JE770 DISPLAY HP KB KEY-SW KEY-SW MAINMDS-JE770 MDS-JE770 MAIN Q490 MDS-JE770 MAINVOL-SEL MDS-JE770 MAIN PTMDS-JE770 MEMO2001.05 MDS-JE770 REVISION HISTORYDate Description of Revision

3-4. MAIN BOARD

6 Two screws

(+BVTP3x8)