Sony MDS-JE770 Initial Setting of Adjustment Value, Temperature Compensation Offset Adjutment

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MDS-JE770

5-7. INITIAL SETTING OF ADJUSTMENT VALUE

Note:

Mode which sets the adjustment results recorded in the non-vola- tile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value.

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

For details of the initial setting, refer to “5-4. Precautions on Ad- justments” and execute the initial setting before the adjustment as required.

Setting Procedure :

1.Rotate the lAMS L knob to display “ADJCLEAR” (C28).

2.Press the YES button. “Complete!” will be displayed momen- tarily and initial setting will be executed, after which “ADJ CLEAR”(C28) will be displayed.

5-8. RECORDING AND DISPLAYING THE Iop

INFORMATION

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

Recording Procedure :

1. While pressing the lAMS L knob and x button, con- nect the power plug to the outlet, and release the lAMS L knob and x button.

2.Rotate the lAMS L knob to display “[Service]”, and press the YES button.

3.Rotate the lAMS L knob to display “Iop.Write”(C05), and press the YES button.

4.The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink.

5.Input the Iop value written on the optical pick-up.

To select the number : Rotate the lAMS L knob.

To select the digit : Press the lAMS L knob

6.When the YES button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

7.As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button.

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

Display Procedure :

1.Rotate the lAMS L knob to display “Iop.Read”(C26) and press the YES button.

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

@@.@ indicates the Iop value labeled on the pick-up.

##.# indicates the Iop value after adjustment

3.To end, press the lAMS L button or MENU/NO button to display “Iop Read”(C26).

5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT

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 temperature of this part has become the ambient tempera-

ture.

Adjusting Procedure :

1.Rotate the lAMS L knob and display “TEMP ADJUS” (C03).

2.Press the YES button and select the “TEMP ADJUS”(C03) mode.

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

4.To save the data, press the YES button.

When not saving the data, press the MENU/NO button.

5.When the YES button is pressed, “TEMP = SAVE” will be displayed and turned back to “TEMPADJUS”(C03) display then. When the MENU/NO button is pressed, “TEMPADJUS” (C03) will be displayed immediatelly.

Specified Value :

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

5-10. LASER POWER ADJUSTMENT

Check the Iop value of the optical pick-up before adjustments. (Refer to 5-8. Recording and Displaying Iop Information.)

Laser power meter

Optical pick-up objective lens

Digital volt meter

BD board

CN105 pin 1 (I+3V)

CN105 pin 2 (IOP)

Connection :

Adjusting Procedure :

1.Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m button or M button to move the optical pick-up.)

Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (IOP).

2.Rotate the lAMS L knob and display “LDPWR ADJUST”(C04).

(Laser power : For adjustment)

3.Press the YES button once and display “LD 0.9 mW $ ”.

4.Rotate the lAMS L knob so that the reading of the laser power meter becomes the specified value. Press the YES button after setting the range knob of the laser power meter, and save the adjustment results. (“LD SAVE $ ” will be displayed for a moment.)

5.Then “LD 7.0 mW $ ” will be displayed.

6.Rotate the lAMS L knob so that the reading of the

laser power meter becomes the specified value, press the YES button and save it.

Note : Do not perform the emission with 7.0 mW more than 15

seconds continuously.

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Contents MDM-7A Specifications873-890-11 MDS-S50SELF-DIAGNOSIS Function Genera l Power requirementsSupplied accessories MDS-JE770Items of Error History Mode Items and Contents Exploded Views Table of ContentsDisassembly DiagramsFlexible Circuit Board Repairing MDS-JE770 Section Service NotesIOP JIG for Checking BD Board WaveformRecord Precedure Optical PICK-UP Block Type Discrimination KSN-260EForced Reset Checks Prior to Parts Replacement and AdjustmentsMain Board Component Side Bit Binary Retry Cause Display ModeHigher Bits Lower Bits Hexa Details Bit When BinaryHexadecimal 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 Exiting the Test Mode MDS-JE770 Section Test ModePrecautions for USE of Test Mode Setting the Test ModeSelecting the Test Mode MENU/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 FunctionParts Replacement and Adjustment MDS-JE770 Section Electrical AdjustmentsCheck before replacement Auto Gain Control Output Level Adjustment flowTemp Adjust Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B/260E Precautions for AdjustmentsChecks Prior to Repairs Using the Continuously Recorded DiscTraverse Waveform Auto CheckOther Checks Traverse CheckSelf-Recording/playback Check Play Check MO Error Rate CheckCD Error Rate Check Focus Bias CheckTemperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Iop NV Save Traverse AdjustmentFocus Bias Adjustment MO 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 MDS-JE770 Section DiagramsMain Board For schematic diagramsFor printed wiring boards BD BoardIC171 Block Diagrams BD SectionIC190 IC360 2/2 Main SectionIC1 2/2 Write Head SemiconductorOVERSemiconductor Optical Pick UP BlockBoard Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams IC1 Model is printed on diagramHP Board Display BoardKB Board KEY-SW BoardLED Drive Schematic Diagram Display SectionCN921 C924 LF900 C910 RY910C951 C952 D910Main Schematic Diagram Power SectionIC101 CXA2523AR BD Board IC Block DiagramsIC500 AK4524 Main Board IC101 CXA2523AR RF Amplifier BD Board IC PIN Function DescriptionPin No Pin Name Description Pin No Pin Name Desription Avdd MvciAsyo AsyiFS4 TfdrFfdr FrdrFlck IIC PowerADA.RESET FldtProtect ADA. LatchEPN DINT1/H ClipREC Flcs TimerSTB Beep SWOSC0 ResetVDISP1 VFL1Chassis Section Section Exploded ViewsNot supplied Supplied with J790 FL750 With RV790 FL750 1-517-987-11 Indicator TUBE, FluorescentMechanism MDM-7A Motor ASSY, Loading HEAD, Over LightMotor ASSY, Spindle Motor ASSY, SledMDS-JE770 Section Electrical Parts List Short SwitchMetal Chip Jumper ResistorMDS-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
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