MDS-JE770 Section Electrical Adjustments | Sony manual

MDS-JE770

SECTION 5

ELECTRICAL ADJUSTMENTS

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.	NG
Laser Power Check
(See page 28)
OK
5-6-3.	NG
Iop Compare
(See page 28)
OK
5-6-4.	NG	Replace Optical pick-up or MDM-7A
Auto Check		Replace Optical pick-up or MDM-7A
(See page 29)

OK

Other faults are suspected.

Check the threading mechanism, etc.

25

Image 25

Sony specifications MDS-JE770 Section Electrical Adjustments, Parts Replacement and Adjustment, Check before replacement

Contents

873-890-11 SpecificationsMDS-S50 MDM-7A Supplied accessories Genera l Power requirementsMDS-JE770 SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Disassembly Table of ContentsDiagrams Exploded Views Flexible Circuit Board Repairing MDS-JE770 Section Service Notes IOP JIG for Checking BD Board Waveform Record Precedure Optical PICK-UP Block Type Discrimination KSN-260E Forced Reset Checks Prior to Parts Replacement and AdjustmentsMain Board Component Side Bit Binary Retry Cause Display Mode Higher Bits Lower Bits Hexa Details Bit When BinaryHexadecimal Binary Button Descriptions MDS-JE770 Section General Disassembly Flow MDS-JE770 Section Disassembly Front Panel Section Two screws Main Board Over Light Head HR901, BD Board Mechanism Deck Section MDM-7A Loading Motor Assy M103 Holder Assy Optical PICK-UP Sled Motor Assy M102, Slider Spindle Moter Assy M101 Precautions for USE of Test Mode MDS-JE770 Section Test ModeSetting the Test Mode Exiting the Test Mode Selecting the Test Mode MENU/NO Operating the Continuous Playback Mode Mode display Test Mode DisplaysError rate display Functions of Other Buttons Meanings of Other Displays When Memory NG is DisplayedAutomatic SELF-DIAGNOSIS Function Information Parts Replacement and Adjustment MDS-JE770 Section Electrical AdjustmentsCheck before replacement Auto Gain Control Output Level Adjustment flow Precautions for USE of Optical PICK- UP KMS-260B/260E Precautions for Checking Laser Diode EmissionPrecautions for Adjustments Temp Adjust Checks Prior to Repairs Using the Continuously Recorded Disc Other Checks Auto CheckTraverse Check Traverse Waveform CD Error Rate Check Play Check MO Error Rate CheckFocus Bias Check Self-Recording/playback Check Temperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Iop NV Save Traverse Adjustment Focus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points Circuit Boards Location MDS-JE770 Section Diagrams For printed wiring boards For schematic diagramsBD Board Main Board IC171 Block Diagrams BD SectionIC190 IC360 2/2 Main SectionIC1 2/2 Semiconductor SemiconductorOVEROptical Pick UP Block Write Head Board Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams IC1 Model is printed on diagram KB Board Display BoardKEY-SW Board HP Board LED Drive Schematic Diagram Display Section C951 C952 RY910D910 CN921 C924 LF900 C910 Main Schematic Diagram Power Section IC101 CXA2523AR BD Board IC Block Diagrams IC500 AK4524 Main Board IC101 CXA2523AR RF Amplifier BD Board IC PIN Function DescriptionPin No Pin Name Description Pin No Pin Name Desription Asyo MvciAsyi Avdd Ffdr TfdrFrdr FS4 ADA.RESET IIC PowerFldt Flck EPN ADA. LatchDINT1/H Clip Protect STB TimerBeep SW REC Flcs VDISP1 ResetVFL1 OSC0 Chassis Section Section Exploded Views Not supplied Supplied with J790 FL750 With RV790 FL750 1-517-987-11 Indicator TUBE, Fluorescent Mechanism MDM-7A Motor ASSY, Spindle HEAD, Over LightMotor ASSY, Sled Motor ASSY, Loading MDS-JE770 Section Electrical Parts List Metal Chip SwitchJumper Resistor Short MDS-JE770 Display HP KB KEY-SW KEY-SW Main MDS-JE770 Main 2SD2144S-TP-UVW Resistor VOL-SEL MDS-JE770 Main PT Memo MDS-JE770 Revision History