Sony MDS-JE640 specifications Traverse Adjustment, Iop NV Save

Page 27

7. Then, rotate the AMS knob and display “LDPWR CHECK”.

8. Press the YES button once and display “LD 0.9 mW $ ”. Check that the reading of the laser power meter become 0.85 to

0.91 mW.

9.Press the YES button once more and display “LD 7.0 mW $

”. Check that the reading the laser power meter and digital volt meter satisfy the specified value.

Note down the digital voltmeter reading value.

Specified Value :

Laser power meter reading : 7.0 ± 0.2 mW

Digital voltmeter reading : Optical pick-up displayed value ± 10%

(Optical pick-up label)

KMS260B

(For details of the method for checking

20101

this value, refer to “5-8. Recording and

Displaying IOP Information”.)

H0576

 

 

 

R

 

Iop = 57.6 mA in this case

Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)

10.Press the MENU/NO button and display “LDPWR CHECK” and stop the laser emission.

(The MENU/NO button is effective at all times to stop the laser emission.)

11.Rotate the AMS knob to display “Iop.Write”.

12.Press the YES button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the YES button to display “Measu=@@@.@” (@ is an arbitrary number).

13.The numbers which can be changed will blink. Input the Iop value noted down at step 9.

To select the number : Rotate the AMS knob.

To select the digit : Press the AMS knob

14.When the YES button is pressed, “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”.

Note 1: After step 4, each time the YES button is pressed, the display will be switched between “LD 0.7 mW $ ”, “LD

6.2mW $ ”, and “LD Wp $ ”. Nothing needs to be performed here.

5-11. Iop NV SAVE

Write the reference values in the nonvolatile memory to perform “Iop compare”. As this involves rewriting the reference values, do not perform this procedure except when adjusting the laser power during replacement of the Optical pick-up and when replacing the IC102. Otherwise the Optical pick-up check may deteriorate.

Note: Perform this function with the optical pick-up set at room temperature.

Procedure

1.Rotate the AMS knob to display “Iop NV Save” (C06).

2.Press the YES button and display “Iop [stop]”.

3.After the display changes to “Iop =xxsave?”, press the YES button.

4.After “Complete!” is displayed momentarily, the display changes to “Iop 7.0 mW”.

5.After the display changes to “Iop=yysave?”, press the YES button.

6.When “Complete!” is displayed, it means that Iop NV saving has been completed.

5-12. TRAVERSE ADJUSTMENT

Connection :

Oscilloscope

BD board

CN105 pin 4 (TE)

CN105 pin 6 (VC)

V : 0.5 V/div

H : 10 ms/div

Input : DC mode

Adjusting Procedure :

1.Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) of the BD board.

2.Load a test disc (MDW-74/GA-1). (Refer to Note 1.)

3.Press the M button and move the optical pick-up outside the pit.

4.Rotate the AMS knob and display “EF MO ADJUST”.

5.Press the YES button and display “EFB = MO-R”.

(Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)

6.Rotate the AMS knob so that the waveform of the oscilloscope becomes the specified value.

(When the AMS knob is rotated, the of “EFB= ” changes and the waveform changes.) In this adjustment, waveform var- ies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

(Read power traverse adjustment)

(Traverse Waveform)

A

VC

B

Specification A = B

7.Press the YES button and save the result of adjustment to the non-volatile memory (“EFB = SAVE” will be displayed for a moment. Then “EFB = MO-W” will be displayed).

8.Rotate the AMS knob so that the waveform of the oscilloscope becomes the specified value.

(When the AMS knob is rotated, the of “EFB- MO-W” changes and the waveform changes.) In this adjustment, wave- form varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

(Write power traverse adjustment)

(Traverse Waveform)

A

VC

B

Specification A = B

9.Press the YES button, and save the adjustment results in the non-volatile memory. (“EFB = SAVE” will be displayed for a moment.)

10.“EFB = MO-P”. will be displayed.

The optical pick-up moves to the pit area automatically and servo is imposed.

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Contents NEW SpecificationsInputs OutputsThree- or five Digit code Cause/Remedy Message Supplied accessoriesSELF-DIAGNOSIS Function GeneralItems of Error History Mode Items and Contents Exploded Views Table of ContentsDisassembly DiagramsFlexible Circuit Board Repairing Section Service NotesIOP JIG for Checking BD Board WaveformRecord Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetMain Board Component Side Bit Binary Retry Cause Display ModeHexadecimal t Binary Conversion Table Section General Front Panel Section Section DisassemblyPT BOARD, VOL-SEL Board Main BoardBD Board Mechanism Deck Section MDM-7AExiting the Test Mode Section Test ModePrecautions for USE of Test Mode Setting the Test ModeDisplay Details Mark Group Selecting the Test ModeMENU/NO Operating the Continuous Playback ModeFunctions of Other Buttons Test Mode DisplaysMode display Error rate displayInformation When Memory NG is DisplayedMeanings of Other Displays Automatic SELF-DIAGNOSIS FunctionSection Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement YES Adjustment flowPrecautions for Checking Laser Diode Emission Precautions for USE of Optical PICK- UP KMS-260BPrecautions for Adjustments Checks Prior to Repairs Using the Continuously Recorded DiscOther Checks Auto CheckCD Error Rate Check Play Check MO Error Rate CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Iop NV Save Traverse AdjustmentYES Focus Bias AdjustmentMO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Circuit Boards Location Section DiagramsFor schematic diagrams For printed wiring boardsBlock Diagrams BD Section Signal PathMDS-JE640 REC Analog Main SectionBD Board Main BoardDisplay Board Semiconductor Printed Wiring Board BD SectionPIN PIN Function Printed Wiring Board Main Section Side a Printed Wiring Board Main Section Side B IC1IC2 PIN MDS-JE640 Schematic Diagram Main /3 See page 47 for IC Block Diagrams Printed Wiring Board Power Section Printed Wiring Board Display Section Schematic Diagram Display Section See page 34 for Waveforms IC101 CXA2523AR BD Board IC Block DiagramsIC400 LA5643 Main Board IC101 CXA2523AR RF Amplifier BD Board IC PIN FunctionsMNT0 FOK Mvci Tfdr IC1 M30805SGP System Control Main Board HLDA/ALE Chassis Section Section Exploded ViewsPanel ASSY, Front Silver Panel ASSY, Front Black AEP,UK,CIS,SP,MY202 220 201 213 215 216 205 218 207 Mechanism MDM-7AMotor ASSY, Loading HEAD, Over LightMotor ASSY, Spindle Motor ASSY, SledSection Electrical Parts List IC BA033FP-E2 IC TC7WU04FUTE12RMetal Chip IC MC74ACT08DTR2Display KEY-SW Main PLUG, Connector 10P Diode PIN, Connector 3PCONNECTOR, FFC 17P PIN, Connector 4PTransistor UN2111-TX IC SN74LVU04ANSRAEP,UK,CIS Transistor UN2211-TXComposition Circuit Block ConnectorTRANSFORMER, Power CND TRANSFORMER, Power SP,MYVOL-SEL Sony Corporation
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