Led Exposure Unit-Related Adjustments; Points To Note When Handling The Led Exposure Unit - Canon C2050 Service Handbook

5 LED Exposure Unit-Related Adjustments

5.1 Points to Note When Handling the LED Exposure Unit

• Before holding the LED exposure unit, be sure to put on a strap (CK-0534-000)
grounded to the printer unit.
• The LED exposure unit contains parts mounted with an extremely high accuracy; be
sure to take care not to impose force to its parts.
• When holding the LED exposure unit, be sure to pick both edges of the aluminum sub-
strate; do NOT touch the lens surface or the aluminum base on which lenses are
mounted. (Contact with a hand can cause image faults regardless of the presence of oils
or stains.)
Aluminum substrate
• Unless the lens surface is apparently soiled and image faults (light image, uneven den-
sity) occur as a result, do NOT clean the lens surface.
If you have no other choice (as when
mounting the unit to the machine),
you may lightly pick this area.
Lens surface
F02-501-01 Holding the LED Exposure Unit
CHAPTER 2 STANDARDS AND ADJUSTMENTS
Lens base (aluminum)
Aluminum substrate
2-17P