Sony MDS-JE770 specifications Selecting the Test Mode

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MDS-JE770

4-5. SELECTING THE TEST MODE

There are 26 types of test modes as shown below. The groups can be switched by rotating the lAMS L knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the lAMS L knob switches between these modes. Refer to “Group” in the table for details selected.

All adjustments and checks during servicing can be performed in the test mode in the Service group.

NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally.

If the [Develop] group is set accidentally, press the

MENU/NO button immediately to exit the [Develop] group.

Display

AUTO CHECK

Err Display

TEMP ADJUS

LDPWR ADJUS

Iop Write

Iop NV Save

EF MO ADJUS

EF CD ADJUS

FBIAS ADJUS

AG Set (MO)

AG Set (CD)

TEMP CHECK

LDPWR CHECK

EF MO CHECK

EF CD CHECK

FBIAS CHECK

ScurveCHECK

VERIFYMODE

DETRK CHECK

0920 CHECK

Iop Read

Iop Compare

ADJ CLEAR

INFORMATION

CPLAY1MODE

CREC 1MODE

Group

No.

Details

Mark

Check

Service

C01 Automatic self-diagnosis

C02 Error history display, clear

C03 Temperature compensation offset adjustment

C04 Laser power adjustment

C05 Iop data writing

C06 Writes current Iop value in read nonvolatile memory using microprocessor

C07 Traverse (MO) adjustment

C08 Traverse (CD) adjustment

C09 Focus bias adjustment

C10 Focus, tracking gain adjustment (MO)

C11 Focus, tracking gain adjustment (CD)

C12 Temperature compensation offset check

C13 Laser power check

C14 Traverse (MO) check

C15 Traverse (CD) check

C16 Focus bias check

C17 S-curve check

C18 Nonvolatile memory check

C19 Detrack check

C25 Most circumference check

C26 Iop data display

C27 Comparison with initial Iop value written in nonvolatile memory

C28 Initialization of nonvolatile memory for adjustment values

C31 Display of microprocessor version, etc.

C34 Continuous playback mode

C35 Continuous recording mode

•For details of each adjustment mode, refer to “5. Electrical Adjustments”.

For details of “Err Display” (C02), refer to “Self-Diagnosis Function” on page 2.

•If a different mode has been selected by mistake, press the MENU/NO button to exit that mode.

•Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set acciden- tally, press the MENU/NO button to exit the mode immediately.

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Contents 873-890-11 SpecificationsMDS-S50 MDM-7ASupplied accessories Genera l Power requirementsMDS-JE770 SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Disassembly Table of ContentsDiagrams Exploded ViewsFlexible Circuit Board Repairing MDS-JE770 Section Service NotesIOP JIG for Checking BD Board WaveformRecord Precedure Optical PICK-UP Block Type Discrimination KSN-260EChecks Prior to Parts Replacement and Adjustments Forced ResetMain Board Component Side Bit Binary Retry Cause Display ModeBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary Button Descriptions MDS-JE770 Section GeneralDisassembly Flow MDS-JE770 Section DisassemblyFront Panel Section Two screws Main BoardOver Light Head HR901, BD Board Mechanism Deck Section MDM-7ALoading Motor Assy M103 Holder AssyOptical PICK-UP Sled Motor Assy M102, SliderSpindle Moter Assy M101 Precautions for USE of Test Mode MDS-JE770 Section Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode MENU/NO Operating the Continuous Playback ModeMode display Test Mode DisplaysError rate display Functions of Other ButtonsMeanings of Other Displays When Memory NG is DisplayedAutomatic SELF-DIAGNOSIS Function InformationMDS-JE770 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement Auto Gain Control Output Level Adjustment flowPrecautions for USE of Optical PICK- UP KMS-260B/260E Precautions for Checking Laser Diode EmissionPrecautions for Adjustments Temp AdjustChecks Prior to Repairs Using the Continuously Recorded DiscOther Checks Auto CheckTraverse Check Traverse WaveformCD Error Rate Check Play Check MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Iop NV Save Traverse AdjustmentFocus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Circuit Boards Location MDS-JE770 Section DiagramsFor printed wiring boards For schematic diagramsBD Board Main BoardBlock Diagrams BD Section IC171IC190 Main Section IC360 2/2IC1 2/2 Semiconductor SemiconductorOVEROptical Pick UP Block Write HeadBoard Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams IC1 Model is printed on diagramKB Board Display BoardKEY-SW Board HP BoardLED Drive Schematic Diagram Display SectionC951 C952 RY910D910 CN921 C924 LF900 C910Main Schematic Diagram Power SectionIC101 CXA2523AR BD Board IC Block DiagramsIC500 AK4524 Main Board IC PIN Function Description IC101 CXA2523AR RF Amplifier BD BoardPin No Pin Name Description Pin No Pin Name Desription Asyo MvciAsyi AvddFfdr TfdrFrdr FS4ADA.RESET IIC PowerFldt FlckEPN ADA. LatchDINT1/H Clip ProtectSTB TimerBeep SW REC FlcsVDISP1 ResetVFL1 OSC0Chassis Section Section Exploded ViewsNot supplied Supplied with J790 FL750 With RV790 FL750 1-517-987-11 Indicator TUBE, FluorescentMechanism MDM-7A Motor ASSY, Spindle HEAD, Over LightMotor ASSY, Sled Motor ASSY, LoadingMDS-JE770 Section Electrical Parts List Metal Chip SwitchJumper Resistor ShortMDS-JE770 Display HP KB KEY-SW KEY-SW Main MDS-JE770 Main 2SD2144S-TP-UVW Resistor VOL-SEL MDS-JE770 Main PTMemo MDS-JE770 Revision History