Sony MDS-NT1 service manual Flexible Circuit Board Repairing

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MDS-NT1

The laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the bottom exterior.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure.

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be dam- aged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of the soldering iron around 270 ˚C dur- ing repairing.

•Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

•Be careful not to apply force on the conductor when soldering or unsoldering.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

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Contents Specifications MDS-NT1Playback Recording Cause/Remedy Indicator Green Red MDS-NT1 SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents MDS-NT1Table of Error Codes Error Code Details of ErrorDiagrams Table of ContentsDisassembly SELF-DIAGNOSIS FunctionFlexible Circuit Board Repairing MDS-NT1 Section Servicing Notes BD Board Conductor SideJIG for Checking BD Board Waveform Record Procedure Checks Prior to Parts Replacement and Adjustments in MD Criteria for Determination Measure if unsatisfactoryMicrocomputer Version Display Service ModeSoftware Reset System RequirementsMDS-NT1 Section General Front ViewMDS-NT1 Section Disassembly Disassembly FlowCase Upper Main Board MD Mechanism Deck MDM-7S2BFront Panel Section BD BOARD, Over Write Head HR901Holder Assy Loading Motor Assy M103Sled Motor Assy M102 Optical PICK-UP KMS-262ESpindle Motor Assy M101 Setting the Test Mode MDS-NT1 Section Test ModePrecautions for USE of Test Mode Releasing the Test ModeSelecting the Test Mode CheckOperating the Continuous Playback Mode Automatic SELF-DIAGNOSIS Function InformationMDS-NT1 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement Adjustment flow YESHOW to Identify Optical PICK-UP KMS- 262A/KMS-262E Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-262A/262E KMS-262A KMS-262EPrecautions for Adjustments Laser power meterLaser Power Check Using the Continuously Recorded DiscTemperature Compensation Offset Check Checks Prior to RepairsAuto Check Other ChecksTraverse Check Focus Bias Check Play Check MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Recording and Displaying the IopTraverse Adjustment Iop NV SaveFocus Bias Adjustment ENTER/YES buttonCD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjustment and Checking Loacation MDS-NT1 Section Diagrams Block Diagram Servo SectionBlock Diagram Main Section 36 aWaveforms BD Board 22.7 nsPrinted Wiring Board BD Board Semiconductor Location4AA 3AA Schematic Diagram BD Board 2/2 See page 38 for Waveforms B3B 2BBPrinted Wiring Board Main Board Component Side IC451Printed Wiring Board Main Board Conductor Side Main Board1AA AA2 AA3 GND Printed Wiring Board Panel Board Panel Board Conductor SideSchematic Diagram Panel Board IC Block Diagrams BD Board CXA2523ARIC401 BH6519FS-E2 Main BoardIC440 M54641L BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP IC PIN Function DescriptionMNT2 Xbusy Xcas APC Main Board IC301 M30835FJGP-01 System Controller PLAY-SW Pin No Extal Section MDS-NT1 Exploded Views Case Section56 4-951-620-01 Screw 2.6X8, +BVTP Case B Section 102 101 103104 105 311 310 319 304 308 302 306 320 301 305 313 314 315 316317 303 307 364 359358 357 360 356 355 354 362 359 352MDS-NT1 Section Electrical Parts List ResistorsDiode Switch MDS-NT1 MainFB1 MDS-NT1 Main Panel MiscellaneousMotor ASSY, Loading Revision History