Checks Prior to Parts Replacement and Adjustments | Sony MDS-PC3

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

•5-6-2. Laser power check (see page 27)

•5-6-3. Iop Compare (see page 27)

•5-6-4. Auto Check (see page 28)

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.

When performing adjustments, use the specified values for adjustments.

FORCED RESET

The system microprocessor can be reset in the following procedure.

Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.

Procedure :

Remove the short-pin attached to CN420, and then attach it again.

[MAIN BOARD] (Component Side)

CN420

8

Image 8

Sony MDS-PC3 specifications Checks Prior to Parts Replacement and Adjustments, Forced Reset, Main Board Component Side

Contents

Specifications MDS-PC3 SELF-DIAGNOSIS Function TOC t Edit t TOC Edit t blank t Items of Error History Mode Items and Contents Table of Contents DisassemblyDiagrams Table of Error Codes Lead free soldering Section Service NotesFlexible Circuit Board Repairing JIG for Checking BD Board Waveform Record Precedure Main Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Retry Cause Display Mode Bit Binary Hexadecimal t Binary Conversion Table Remote Parts Description General Section Using the Display Hooking Up Section Disassembly MD Mechanism Deck MDM-7A Main Board Over Light Head HR901, BD MD Board Holder Assy Loading Motor Assy M103 Sled Motor Assy M102, Slider Optical PICK-UP MD KMS-260B/JIN Spindle Motor Assy M101 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test Mode Selecting the Test Mode Display Details Mark Group Operating the Continuous Playback Mode Test Mode Displays Mode displayError rate display Functions of Other Buttons Information Meanings of Other DisplaysAutomatic SELF-DIAGNOSIS Function Check before replacement Section Electrical AdjustmentsParts Replacement and Adjustment Adjustment flow Precautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B Using the Continuously Recorded Disc Checks Prior to Repairs Auto Check Other Checks Play Check MO Error Rate Check CD Error Rate Check Laser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Traverse Adjustment Iop NV Save Focus Bias Adjustment Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points Diagrams Block Diagrams BD Section MDS-PC3 Main Section Sclk Cclk Printed Wiring Board BD Section Semiconductor PIN 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 Board LB1830M-S-TE-L Main Board BH3541F-E2 Main Board IC PIN Functions IC101 CXA2523AR RF Amplifier BD Board MNT0 FOK Mvci IC300 M30805SGP Main Board Shck MNT1 Section Exploded Views Chassis Section Mechanism MDM-7A 319 302 320 317 304 308 303 305 306 301 318 307 Mechanism 351 Section Electrical Parts List Remarks Ref. No Description Metal Chip Main PIN, Connector 2P Diode Main Panel MDS-PC3 Panel KEY REFLECT/PROTECT SW