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

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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