Sony MDS-NT1 service manual Precautions for Adjustments, Laser power meter

Page 27

MDS-NT1

5-5. PRECAUTIONS FOR ADJUSTMENTS

1.When replacing the following parts, perform the adjustments and checks with in the order shown in the following table.

2.Set the test mode when performing adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in “group Service” of the test mode.

3.Perform the adjustments to be needed in the order shown.

4.Use the following tools and measuring devices.

•Check Disc (MD) TDYS-1 (Part No. : 4-963-646-01)

•Test Disk (MDW-74/GA-1) (Part No. : 4-229-747-01)

•Laser power meter LPM-8001 (Part No. : J-2501-046-A) or

MD Laser power meter 8010S (Part No. : J-2501-145-A)*1

•Oscilloscope (Measure after performing CAL of prove)

•Digital voltmeter

•Thermometer

•Jig for checking BD board waveform (Part No. : J-2501-149-A)

•Attached software “OpenMG Jukebox” (Part No. : 4-237-880-01)

•Software for test mode

(Distributed together with the Service Manual)

•Attached USB cable (Part No. : 1-757-471-11)

•Personal computer (Refer to Servicing Notes)

5.When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscil- loscope.

(VC and ground will become short-circuited)

6.Using the above jig enables the waveform to be checked with- out the need to solder.

(Refer to Servicing Note on page 8)

7.As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.

8.In normal operation check after the completion of adjustment, be sure to perform the recording check (check in, check out) using the software “OpenMG Jukebox” attached.

*1 Laser power meter

When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. : J-2501-145-A) instead of the conventional laser power me- ter is convenient.

It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.

 

 

 

 

Parts to be replaced

 

 

 

Adjustment

Optical

IC101

IC701

IC201

IC933

IC195*

D101

 

Pick-up

 

 

 

 

 

 

 

7. Initial setting of adjustment value

 

 

 

 

 

 

 

8.Recording of Iop information

9.Temperature compensation offset adjustment

10.Laser power adjustment

11.Iop NV Save

12.Traverse adjustment

13.Focus bias adjustment

16.Auto gain adjustment 6-4. AUTO CHECK

*The IC195 cannot be replaced with a new part.

For detail refer to “Notes on Replacing BD Board or MD Mechanism Deck” (See page 7).

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Contents MDS-NT1 SpecificationsMDS-NT1 SELF-DIAGNOSIS Function Playback Recording Cause/Remedy Indicator Green RedMDS-NT1 Items of Error History Mode Items and ContentsError Code Details of Error Table of Error CodesSELF-DIAGNOSIS Function Table of ContentsDisassembly DiagramsFlexible Circuit Board Repairing BD Board Conductor Side MDS-NT1 Section Servicing NotesJIG for Checking BD Board Waveform Record Procedure Criteria for Determination Measure if unsatisfactory Checks Prior to Parts Replacement and Adjustments in MDSystem Requirements Service ModeSoftware Reset Microcomputer Version DisplayFront View MDS-NT1 Section GeneralDisassembly Flow MDS-NT1 Section DisassemblyCase Upper MD Mechanism Deck MDM-7S2B Main BoardBD BOARD, Over Write Head HR901 Front Panel SectionLoading Motor Assy M103 Holder AssyOptical PICK-UP KMS-262E Sled Motor Assy M102Spindle Motor Assy M101 Releasing the Test Mode MDS-NT1 Section Test ModePrecautions for USE of Test Mode Setting the Test ModeCheck Selecting the Test ModeOperating the Continuous Playback Mode Information Automatic SELF-DIAGNOSIS FunctionMDS-NT1 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement YES Adjustment flowKMS-262A KMS-262E Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-262A/262E HOW to Identify Optical PICK-UP KMS- 262A/KMS-262ELaser power meter Precautions for AdjustmentsChecks Prior to Repairs Using the Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckAuto Check Other ChecksTraverse Check Self-Recording/playback Check Play Check MO Error Rate CheckCD Error Rate Check Focus Bias CheckRecording and Displaying the Iop Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Laser Power AdjustmentIop NV Save Traverse AdjustmentENTER/YES button Focus Bias AdjustmentMO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level AdjustmentAdjustment and Checking Loacation Block Diagram Servo Section MDS-NT1 Section Diagrams36 a Block Diagram Main Section22.7 ns Waveforms BD BoardSemiconductor Location Printed Wiring Board BD Board4AA 3AA B3B 2BB Schematic Diagram BD Board 2/2 See page 38 for WaveformsIC451 Printed Wiring Board Main Board Component SideMain Board Printed Wiring Board Main Board Conductor Side1AA AA2 AA3 GND Panel Board Conductor Side Printed Wiring Board Panel BoardSchematic Diagram Panel Board CXA2523AR IC Block Diagrams BD BoardMain Board IC401 BH6519FS-E2IC440 M54641L IC PIN Function Description BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMPMNT2 Xbusy Xcas APC Main Board IC301 M30835FJGP-01 System Controller PLAY-SW Pin No Extal Case Section Section MDS-NT1 Exploded Views56 4-951-620-01 Screw 2.6X8, +BVTP Case B Section 102 101 103104 105 311 310 319 304 308 302 306 320 301 305 313 314 315 316317 303 307 355 354 362 359 352 359358 357 360 356 364Resistors MDS-NT1 Section Electrical Parts ListDiode MDS-NT1 Main SwitchFB1 Miscellaneous MDS-NT1 Main PanelMotor ASSY, Loading Revision History
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