7
MDS-NT1
SECTION 1
SERVICING NOTES
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 HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
(Figure A)
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP
• 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)
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.
IC195
– BD BOARD (Conductor Side) –
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.
