8
MDS-JB980
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 26)
• 5-6-3. Iop Compare (see page 26)
• 5-6-4. Auto Check (see page 27)
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 CN404, and then attach it again.
[MAIN BOARD] (Component Side)
CN404
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.
– BD BOARD
(Conductor Side)
–
OPERATION CHECK IN NORMAL MODE
Aiso 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.
CN103
CN102
IC195
1
41
58
1
27
23
NOTES ON REPLACING BD BOARD OR MD MECHANISM DECK
