Sony MDS-NT1 service manual Initial Setting of Adjustment Value, Recording and Displaying the Iop

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MDS-NT1

5-8. INITIAL SETTING OF ADJUSTMENT VALUE

Note:

Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the tempera- ture compensation offset adjustment will not change to the initial setting value.

If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment.

For details of the initial setting, refer to “5-5. Precautions for Adjustments” and execute the initial setting before the adjustment as required.

Setting Procedure:

1.Click the [JOG UP] or [JOG DOWN] to display “ADJ CLEAR” (C28).

2.Click the [ENTER/YES]. “Complete!” will be displayed mo- mentarily and initial setting will be executed, after which “ADJ CLEAR” (C28) will be displayed.

5-9. RECORDING AND DISPLAYING THE Iop

INFORMATION

The Iop data can be recorded in the non-volatile memory. The Iop value on the optical pick-up label and the Iop value after the ad- justment will be recorded. Recording these data eliminates the need to read the label on the optical pick-up.

Recording Procedure:

1.Click the [JOG UP] or [JOG DOWN] to display “Iop Write” (C05), and click the [ENTER/YES].

2.The display becomes “Ref=@@@.@” (@ is an arbitrary num- ber) and the numbers which can be changed will blink.

3.Input the Iop value on the optical pick-up label.

To select the number : Click the [JOG UP] or [JOG DOWN].

To select the digit : Click the [PUSH].

4.When the [ENTER/YES] is clicked, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

5.As the adjustment results are recorded for the 4 value. Leave it as it is and click the [ENTER/YES].

6.“Complete!!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write” (C05).

Display Procedure:

1.Click the [JOG UP] or [JOG DOWN] to display “Iop Read” (C26), and click the [ENTER/YES].

2.“@@.@/##.#” is displayed and the recorded contents are dis- played.

@@.@ indicates the Iop value on the optical pick-up label. ##.# indicates the Iop value after adjustment

3.To end, click the [PUSH] or [MENU/NO] to display “Iop Read” (C26).

5-10. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT

Save the temperature data at that time in the non-volatile memory as 25 ˚C reference data.

Note:

1.Usually, do not perform this adjustment.

2.Perform this adjustment in an ambient temperature of 22 ˚C to 28 ˚C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 ˚C to 28 ˚C.

3.When D101 has been replaced, perform this adjustment after the tem- perature of this part has become the ambient temperature.

Adjusting Procedure:

1.Click the [JOG UP] or [JOG DOWN] to display “TEMP AD- JUST” (C03).

2.Click the [ENTER/YES] to select the “TEMP ADJUST” mode.

3.“TEMP = [OK” and the current temperature data will be displayed.

4.To save the data, click the [ENTER/YES].

When not saving the data, click the [MENU/NO].

5.When the [ENTER/YES] is clicked, “TEMP = SAVE” will be displayed and turned back to “TEMP ADJUST” (C03) dis- play then. When the [MENU/NO] is clicked, “TEMP ADJUST” (C03) will be displayed immediately.

Specified Value:

The “TEMP = ” should be within “E0 - EF”, “F0 - FF”, “00 - 0F”, “10 - 1F” and “20 - 2F”.

5-11. LASER POWER ADJUSTMENT

Check the Iop value of the optical pick-up before adjustments. (Refer to 5-9. Recording and Displaying Iop Information)

Connection:

laser

power meter

Optical pick-up objective lens

digital voltmeter

BD board

 

 

CN105 pin 1 (I +3 V)

+

CN105 pin 2

(Iop)

–

Adjusting Procedure:

1.Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, click the [FF] or [FR] to move the optical pick-up)

Connect the digital voltmeter to CN105 pin 1 (I+3V) and CN105 pin 2 (Iop) on the BD (MD) board.

2.Click the [JOG UP] or [JOG DOWN] to display “LDPWR ADJUST” (C04).

(Laser power : For adjustment)

3.Click the [ENTER/YES] once to display “L 0.90 mW $ ”.

4.Click the [JOG UP] or [JOG DOWN] so that the reading of the laser power meter becomes specified value. Click the [ENTER/YES] after setting the range knob of the laser power meter, and save the adjustment results. (“LD SAVE $ ” will be displayed for a moment)

Specified Value:

Laser power meter reading: 0.85 to 0.91 mW (KMS-262A)

0.90to 0.95 mW (KMS-262E)

5.Then “L 8.40 mW $ ” (KMS-262A) or “L 8.65 mW $ ” (KMS-262E) will be 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 FunctionParts Replacement and Adjustment MDS-NT1 Section Electrical AdjustmentsCheck 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 CheckOther Checks Auto CheckTraverse 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 102 101 103 Case B Section104 105 302 306 320 301 305 313 314 315 316 311 310 319 304 308317 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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