Sony MDS-PC3 specifications Auto Check, Other Checks

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5-6-4. Auto Check

This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare.

Procedure

1.Press the @/1 button. If “LDPWR minicheck” is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1.

2.If a disc is in the mechanical deck, it will be ejected forcibly. “DISC IN” will be displayed in this case. Load a test disc (MDW- 74/GA-1) which can be recorded.

3.If a disk is loaded at step 2, the check will start automatically.

4.When “XX CHECK” is displayed, the item corresponding to XX will be performed.

When “06 CHECK” completes, the disc loaded at step 2 will be ejected. “DISC IN” will be displayed. Load the check disc (MD) TDYS-1.

5.When the disc is loaded, the check will automatically be resumed from “07 CHECK”.

6.After completing to test item 12, check OK or NG will be displayed. If all items are OK, “CHECK ALL OK” will be displayed. If any item is NG, it will be displayed as “NG:xxxx”.

When “CHECK ALL OK” is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc.

When displayed as “NG:xxxx”, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.

5-6-5. Other Checks

All the following checks are performed by the Auto Check mode. They therefore need not be performed in normal operation.

5-6-6. Traverse Check

5-6-7. Focus Bias Check

5-6-8. C PLAY Check

5-6-9. Self-Recording/Playback Check

5-6-6. Traverse Check

Connection :

Oscilloscope

BD board

CN105 pin 4 (TE)

CN105 pin 6 (VC)

V : 0.5 V/div

H : 10 ms/div

Input : DC mode

Checking Procedure:

1.Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) of the BD board.

2.Load a test disc (MDW-74/GA-1). (Refer to Note 1.)

3.Rotate the AMS knob and display “EF MO CHECK” (C14).

4.Press the @/1 button and display “EFB = MO-R”.

(Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)

5.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. (Read power traverse checking)

(Traverse Waveform)

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

6.Press the @/1 button and display “EFB = MO-W”.

7.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. (Write power traverse checking)

(Traverse Waveform)

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

8. Press the @/1 button display “EFB = MO-P”.

Then, the optical pick-up moves to the pit area automatically and servo is imposed.

9.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob.

(Traverse Waveform)

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

10.Press the @/1 button display “EF MO CHECK” (C14) The disc stops rotating automatically.

11.Press the x/Z “PGM” button and remove the disc.

12.Load the check disc (MD) TDYS-1.

13.Roteto the AMS knob and display “EF CD CHECK” (C15).

14. Press the @/1 button and display “EFB = CD”. Servo is imposed automatically.

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Contents Specifications MDS-PC3SELF-DIAGNOSIS Function TOC t Edit t TOC Edit t blank tItems of Error History Mode Items and Contents Table of Contents DisassemblyDiagrams Table of Error CodesFlexible Circuit Board Repairing Section Service NotesLead free soldering JIG for Checking BD Board Waveform Record Precedure Forced Reset Checks Prior to Parts Replacement and AdjustmentsMain Board Component Side Retry Cause Display Mode Bit BinaryHexadecimal t Binary Conversion Table Remote Parts Description General SectionUsing the Display Hooking Up Section Disassembly MD Mechanism Deck MDM-7AMain Board Over Light Head HR901, BD MD BoardHolder Assy Loading Motor Assy M103Sled Motor Assy M102, Slider Optical PICK-UP MD KMS-260B/JINSpindle Motor Assy M101 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode Display Details Mark GroupOperating the Continuous Playback Mode Test Mode Displays Mode displayError rate display Functions of Other ButtonsAutomatic SELF-DIAGNOSIS Function Meanings of Other DisplaysInformation Parts Replacement and Adjustment Section Electrical AdjustmentsCheck before replacement Adjustment flow Precautions for USE of Optical PICK- UP KMS-260B Precautions for Checking Laser Diode EmissionPrecautions for Adjustments Using the Continuously Recorded Disc Checks Prior to RepairsAuto Check Other ChecksPlay Check MO Error Rate Check CD Error Rate CheckTemperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Traverse Adjustment Iop NV SaveFocus Bias Adjustment Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Diagrams Block Diagrams BD Section MDS-PC3Main Section Sclk CclkPrinted Wiring Board BD Section SemiconductorPIN Function MDS-PC3 Printed Wiring Board Main Section PIN Functon MDS-PC3 Printed Wiring Board Panel Section Schematic Diagram Panel Section See page 35 for Waveforms IC Block Diagrams IC101 CXA2523AR BD BoardLB1830M-S-TE-L Main Board BH3541F-E2 Main Board IC PIN Functions IC101 CXA2523AR RF Amplifier BD BoardMNT0 FOK Mvci IC300 M30805SGP Main Board Shck MNT1 Section Exploded Views Chassis SectionMechanism MDM-7A 319 302 320 317 304 308 303 305 306 301 318 307Mechanism 351Section Electrical Parts List Remarks Ref. No DescriptionMetal Chip Main PIN, Connector 2P Diode Main Panel MDS-PC3 Panel KEY REFLECT/PROTECT SW
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