Sony MDS-NT1 service manual Items of Error History Mode Items and Contents

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MDS-NT1

ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS

Selecting the Test Mode

Display

Details of History

op rec tm

Cumulative recording time is displayed.

 

When cumulative recording time is over 1 minute, the hour and minute are displayed as they are.

 

When it is under 1 minute, “Under 1 min” is displayed.

 

The displayed time shows how long the laser is in high power state.

 

It is about one fourth the actual recording time.

 

 

op play tm

Cumulative playing time is displayed.

 

When cumulative playing time is over 1 minute, the hour and minute are displayed as they are.

 

When it is under 1 minute, “Under 1 min” is displayed.

 

 

spdl rp tm

Cumulative spindle motor running time is displayed.

 

When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are.

 

When it is under 1 minute, “Under 1 min” is displayed.

retry err

Displays the total number of retries during recording and number of retry errors during play.

 

Displayed as “rss pss”.

 

“r” indicates the retries during recording while “p” indicates the retry errors during play.

 

The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.

 

 

total err

Displays the total number of errors.

 

Displayed as “total ss”.

 

The number of errors is displayed in hexadecimal digits from 00 to FF.

err history

Displays the 10 latest errors.

 

Displayed as “0s ErrCd@@”.

 

s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest).

 

@@ indicates the error code.

 

Refer to the following table for the details. The error history can be switched by clicking the [JOG UP] or

 

[JOG DOWN].

 

 

retry adrs

Displays the past five retry addresses.

 

Displays “ss ADRS ssss”, ss is the history number, ssss is the cluster with the retry error.

 

Select the error history number using the [JOG UP] or [JOG DOWN].

 

 

er refresh

Mode to clear the error history and retry address history.

 

[Operating method]

 

1) Click the [JOG UP] or [JOG DOWN] when “er refresh” is displayed.

 

2) The display will change to “er refresh?”, and then click the [ENTER/YES].

 

The operation is over if “Complete!” is displayed.

 

After this mode was executed, check the following:

 

• The data have been cleared.

 

• Perform the recording and playing to check that the mechanism operates normally.

 

 

tm refresh

Mode to clear the “op rec tm” and “op play tm” histories.

 

These histories serve as approximate indications of when to replace the optical pick-up. If the optical pick-up

 

has been replaced, perform this operation and clear the history.

 

[Operating method]

 

1) Click the [JOG UP] or [JOG DOWN] when “tm refresh” is displayed.

 

2) The display will change to “tm refresh?”, and then click the [ENTER/YES].

 

The operation is over if “Complete!” is displayed.

 

After this mode was executed, check the following:

 

• The data have been cleared.

 

• Perform the recording and playing to check that the mechanism operates normally.

 

 

op change

Mode to clear cumulative time of “op rec tm” and “op play tm”.

 

These historical data are used to determine the timing when the optical pick-up is to be replaced. When the

 

optical pick-up was replaced, perform this operation to clear historical data.

 

[Operating method]

 

1) Click the [JOG UP] or [JOG DOWN] when “op change” is displayed.

 

2) The display will change to “op chang?”, and then click the [ENTER/YES].

 

The operation is over if “Complete!” is displayed.

 

 

spdl change

Mode to clear cumulative time of “spdl rp tm”.

 

This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle

 

motor was replaced, perform this operation to clear historical data.

 

[Operating method]

 

1) Click the [JOG UP] or [JOG DOWN] when “spdl change” is displayed.

 

2) The display will change to “spdl chang?”, and then click the [ENTER/YES].

 

The operation is over if “Complete!” is displayed.

 

 

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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