Removing The Input Focusing Unit Optics; Cleaning A Dusty Or Dry-Dirt Coated Optic; Removing The Input Unit Optics - Unitek Miyachi LW250 Operation, Maintenance And Service Manual

Removing the Input Focusing Unit Optics (continued)
6. Slowly lift the input focusing unit. If the
focusing lens does not come out, gently shake
the input focusing unit vertically.
7. Remove the collar, focusing lens and Teflon ring one by
one from input focusing unit. Hold the focusing lens by
its edge. Place the focusing lens on the lens paper.
Cleaning a Dusty Or Dry-Dirt Coated Optic. Refer
to Figure 8-12. To clean an optic that is dusty or coated with
dried dirt, proceed as follows:
Figure 8-12. Cleaning a Dirty Optic
1. Hold the optic horizontally by the edges.
2. Blow off the dust and dry dirt using an air blower.
3. Observe the reflection of fluorescent light on the optic
and verify that there is no dust or dry dirt remaining on
the optic.
990-605 REV B: May, 1997
DRTDST.PCX
LW250 PULSED Nd: YAG LASER
CHAPTER 8: SERVICE
Figure 8-11. Removing the
Input Unit Optics
8-10