Optical Fiber Cleaning; Power Supply Service; Backup Battery Replacement - Unitek Miyachi LW250 Operation, Maintenance And Service Manual

Optical Fiber Cleaning (continued)
3. If Step 2 does not remove the dust on
the end surface, softly wipe it with a
piece of lens paper. CAUTION: Do
not press the lens paper against the end
surface of the optical fiber. It may
scratch the fiber end face.
4. Verify that there is no dust or dirt on the
end face of the fiber.
NOTE: We recommend
a fiber end face checker
for viewing the end sur-
faces of the optical fibers
for scratches, dust or
burns.

Power Supply Service

Backup Battery Replacement. Refer to
Figure 8-16. To replace the backup battery,
proceed as follows:
1. Turn off the main power.
2. Remove the controller cover.
3. Cut the band of the battery on the main PCB
with wire cutters.
4. Disconnect the used battery from the
connector and connect a new battery.
5. Pass a new band through the hole on the
main PCB, then secure the battery in
position.
6. Install the right side cover.
990-605 REV B: May, 1997
LW250 PULSED Nd: YAG LASER
CHAPTER 8: SERVICE
Figure 8-15. Cleaning the
Optical Fiber
Figure 8-16. Backup Battery
Location
OPTCFIB2.PCX
LW25BAT.WPG
8-12