MDS-NT1 Section Servicing Notes, BD Board Conductor Side | Sony

MDS-NT1

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

NOTES ON REPLACING BD BOARD OR MD MECHANISM DECK

In replacing the BD board or MD mechanism deck, perform the work through the steps provided below:

1.Remove the IC195 from the BD board to be replaced.

2.Remove the IC195 from new BD board.

3.Mount the IC195 on new BD board, which was removed from the BD board to be replaced.

4.Install new BD board in the set.

Note: The IC195 cannot be replaced with a new part. If IC195 is faulty, replace the entire BD board.

– BD BOARD (Conductor Side) –

CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP

IC195

•In cleaning the objective lens of optical pick-up, be sure the following below.

1.In cleaning the lens, do not apply an excessive force.

As the optical pick-up is vulnerable, application of excessive force could damage the lens holder.

2.In cleaning, do not use a cleaner other than exclusive cleaning liquid (KK-91 or isopropyl alcohol).

3.Wipe the objective lens spirally from center toward outside. (See Figure A)

(Figure A)

4.Eject the disc, if loaded.

5.Disconnect the power cord from the socket to shut off the power supply.

OPERATION CHECK IN NORMAL MODE

The set alone is capable of performing the play function only. In checking the recording and other functions, connect the set to the PC with a USB cable and perform the operation on the application software “OpenMG Jukebox” attached.

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Sony service manual MDS-NT1 Section Servicing Notes, BD Board Conductor Side

Contents

MDS-NT1 Specifications MDS-NT1 SELF-DIAGNOSIS Function Playback Recording Cause/Remedy Indicator Green Red MDS-NT1 Items of Error History Mode Items and Contents Error Code Details of Error Table of Error Codes SELF-DIAGNOSIS Function Table of ContentsDisassembly Diagrams Flexible Circuit Board Repairing BD Board Conductor Side MDS-NT1 Section Servicing Notes JIG for Checking BD Board Waveform Record Procedure Criteria for Determination Measure if unsatisfactory Checks Prior to Parts Replacement and Adjustments in MD System Requirements Service ModeSoftware Reset Microcomputer Version Display Front View MDS-NT1 Section General Disassembly Flow MDS-NT1 Section Disassembly Case Upper MD Mechanism Deck MDM-7S2B Main Board BD BOARD, Over Write Head HR901 Front Panel Section Loading Motor Assy M103 Holder Assy Optical PICK-UP KMS-262E Sled Motor Assy M102 Spindle Motor Assy M101 Releasing the Test Mode MDS-NT1 Section Test ModePrecautions for USE of Test Mode Setting the Test Mode Check Selecting the Test Mode Operating the Continuous Playback Mode Information Automatic SELF-DIAGNOSIS Function Parts Replacement and Adjustment MDS-NT1 Section Electrical AdjustmentsCheck before replacement YES Adjustment flow KMS-262A KMS-262E Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-262A/262E HOW to Identify Optical PICK-UP KMS- 262A/KMS-262E Laser power meter Precautions for Adjustments Checks Prior to Repairs Using the Continuously Recorded DiscTemperature Compensation Offset Check Laser Power Check Other Checks Auto CheckTraverse Check Self-Recording/playback Check Play Check MO Error Rate CheckCD Error Rate Check Focus Bias Check Recording and Displaying the Iop Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Laser Power Adjustment Iop NV Save Traverse Adjustment ENTER/YES button Focus Bias Adjustment MO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level Adjustment Adjustment and Checking Loacation Block Diagram Servo Section MDS-NT1 Section Diagrams 36 a Block Diagram Main Section 22.7 ns Waveforms BD Board Semiconductor Location Printed Wiring Board BD Board 4AA 3AA B3B 2BB Schematic Diagram BD Board 2/2 See page 38 for Waveforms IC451 Printed Wiring Board Main Board Component Side Main Board Printed Wiring Board Main Board Conductor Side 1AA AA2 AA3 GND Panel Board Conductor Side Printed Wiring Board Panel Board Schematic Diagram Panel Board CXA2523AR IC Block Diagrams BD Board Main Board IC401 BH6519FS-E2 IC440 M54641L IC PIN Function Description BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP MNT2 Xbusy Xcas APC Main Board IC301 M30835FJGP-01 System Controller PLAY-SW Pin No Extal Case Section Section MDS-NT1 Exploded Views 56 4-951-620-01 Screw 2.6X8, +BVTP 102 101 103 Case B Section104 105 302 306 320 301 305 313 314 315 316 311 310 319 304 308317 303 307 355 354 362 359 352 359358 357 360 356 364 Resistors MDS-NT1 Section Electrical Parts List Diode MDS-NT1 Main Switch FB1 Miscellaneous MDS-NT1 Main Panel Motor ASSY, Loading Revision History