Image Formation System - Canon CLC 1120 Service Handbook

C. Image Formation System
Adjusting the Height of
1
Charging Wires
The height (position) of the charging wire
of each charging assembly may be adjusted by
turning the screw found behind the assembly.
A full turn of the screw will shift the charging
wire by about 0.7 mm.
You cannot, however, change the height
of the wire of the internal static eliminator,
external charge eliminator, separation
charging assembly or the post-cleaning
charging assembly.
Points to Note about the
2
Photosensitive Drum
a. The photosensitive drum is vulnerable to
strong light, and exposure to strong light
for an appreciable period of time will lead
to white spots or black bands on copies.
Whenever you have removed the
photosensitive drum from the copier, be
sure to wrap the light-blocking sheet (or
five to six sheets of fresh copy paper)
around it, and keep it in a dark place.
b. If you are installing a new photosensitive
drum, be sure to perform the following:
1) Install the new photosensitive drum.
At this time, be sure to mount it so
that the lot No. label attached inside it
is toward the front of the copier.
2) Mount the
assembly, pre-cleaning charging
assembly, photosensitive drum
cleaner assembly, and developing
assemblies.
3) Coat the No. 2 blade of the black
toner concentration sensor evenly
with drum cleaner lubricant (TKN-
0480).
4) Coat the blade of the photosensitive
drum cleaner assembly with drum
cleaner lubricant (TKN-0480).
5) Dry wipe the window of the black
toner concentration sensor, and
mount it.
primary charging
CHAPTER 2 STANDARDS AND ADJUSTMENTS
Charging
Height of charging wire (mm)
assembly
Primary
charging
assembly
Separation
charging
assembly
External
charging
assembly
Range
4 mm (approx.)
10.5
17.0
Figure 2-17
2-9