Sony MDS-SD1 Error Rate Check, Focus Bias Check, Auto Gain Control Output Level Adjustment

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5-13. ERROR RATE CHECK

5-13-1. CD Error Rate Check

Checking Procedure :

1.Load a check disc (MD) TDYS-1.

2.Rotate the –˜+ knob and display “CPLAY MODE”.

3.Press the ENTER/YES button twice and display “CPLAY MID”.

4.The display changes to “C1 = AD = ”.

5.Check that the C1 error rate is below 20.

6.Press the MENU/NO button, stop playback, press the § but- ton, and remove the test disc.

5-13-2. MO Error Rate Check

Checking Procedure :

1.Load a test disc (MDW-74/AU-1).

2.Rotate the –˜+ knob and display “CPLAY MODE”.

3.Press the ENTER/YES button and display “CPLAY MID”.

4.The display changes to “C1 = AD = ”.

5.If the C1 error rate is below 50, check that ADER is 00.

6.Press the MENU/NO button, stop playback, press the § but- ton, and remove the test disc.

5-14. FOCUS BIAS CHECK

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

1.Load a test disc (MDW-74/AU-1).

2.Rotate the –˜+ knob and display “CPLAY MODE”.

3.Press the ENTER/YES button twice and display “CPLAY MID”.

4. Press the

MENU/NO

button when “C1 =

AD = ” is

displayed.

 

5.Rotate the –˜+ knob and display “FBIAS CHECK”.

6.Press the ENTER/YES button and display “ / c = ”. The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value.

Check that the C1 error is below 50 and ADER is below 2.

7.Press the ENTER/YES button and display “ / b = ”. Check that the C1 error is below 220 and ADER is below 2.

8.Press the ENTER/YES button and display “ / a = ”. Check that the C1 error is below 220 and ADER is below 2

9.Press the MENU/NO button, next press the § button, and remove the continuously recorded disc.

Note 1 : If the C1 error and ADER are above other than the specified value at points a (step 8. in the above) or b (step 7. in the above), the focus bias adjustment may not have been car- ried out properly. Adjust perform the beginning again.

5-15. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT

Be sure to perform this adjustment when the pickup is replaced. If the adjustment results becomes “Adjust NG!”, the pickup may be faulty or the servo system circuits may be abnormal.

5-15-1. CD Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Insert the check disc (MD) TDYS-1.

2.Rotate the –˜+ knob to display “AG Set (CD)”.

3.When the ENTER/YES button is pressed, the adjustment will be performed automatically.

“Complete!!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (CD)”.

4.Press the § button to remove the disc.

5-15-2. MO Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Insert the reference disc (MDW-74/AU-1) for recording.

2.Rotate the –˜+ knob to display “AG Set (MO)”.

3.When the ENTER/YES button is pressed, the adjustment will be performed automatically.

“Complete!!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (MO)”.

4.Press the § button to remove the disc.

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Contents MDM-5A SpecificationsMDS-JE520 MBU-5ASELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Flexible Circuit Board Repairing Specification LabelParts No Diagrams Table of ContentsDisassembly Exploded ViewsSection Servicing Note JIG for Checking BD Board WaveformRecord Precedure Checks Prior to Parts Replacement and Adjustments Criteria for Determination Measure if unsatisfactoryForced Reset Main Board Component SideCleaning of Objective Lens of Optical Pickup Fluorescent Indicator Tube and Mechanism DeckAttaching the Glass Assembly Fluorescent Indicator TUBE, LED Complete Lighting CheckServicing Position Cause of Retry Occurring conditions Retry Cause Display ModeHigher Bits Lower Bits Hexa BinaryBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary Section General Front Panel Location of Parts and ControlsSection Disassembly Glass AssyFront Panel Slider CAM Base Unit and BD BoardSW Board and Loading Motor M103 Setting the Test Mode Section Test ModePrecautions for USE of Test Mode Exiting the Test ModeSelecting the Test Mode GroupOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeFunctions of Other Buttons Test Mode Displays Section Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Adjustments Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK- UP KMS-260A Creating Continuously Recorded DiscChecks Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Specified ValueFocus Bias Check Play Checking MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Section Diagrams Circuit Boards LocationPB Digital out Block Diagrams BD SectionMDS-SD1 REC DigitalMain Section PBDigital outRECDigital Waveforms For schematic diagramsFor printed wiring boards Display SectionPrinted Wiring Board BD Section Semiconductor LocationSchematic Diagram BD 1/2 Section Schematic Diagram BD 2/2 Section Schematic Diagram Main 1/2 Section Schematic Diagram Main 2/2 Section Printed Wiring Board Main Section Schematic Diagram Panel Section Printed Wiring Board Panel Section Schematic Diagram Connector Section Printed Wiring Board Connector Section System Control To HCD-SD1MDS-SD1 IC Block Diagrams BD Section IC101IC152 BH6511FS-E2 Main Section IC201 UDA1341TS/N2IC301 LB1641 Connector Section IC774 P82B715TD.118 IC822 M62016FP-E1IC851 M5293L IC PIN Functions IC101 CXA2523AR RF Amplifier BD BoardPin No Pin Name Function IC701 M30610MC-A01FP System Control ∝CON Main Board CHAK-IN Section Exploded Views Case and Back Panel SectionPanel SW Board FL901 1-517-804-11 Indicator TUBE, FluorescentFront Panel Section 67 A-4724-619-A Panel BOARD, CompleteMechanism Deck Section MDM-5A Insulator F209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A HEAD, Over LightMotor ASSY, Sled Section Electrical Parts List Connector Connector Encoder Main Main FILTER, Line InductorLine Filter FeritePanel Panel SW MANUAL, Instruction CHINESESP,HK Hardware List Accessories & Packing Materials FILTER, Clamp Ferrite CoreMANUAL, Instruction English Screw +BSony Corporation
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