Canon CLC 1120 Service Manual page 542

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 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.
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.
COPYRIGHT © 1999 CANON INC.
primary charging
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Charging
Height of charging wire (mm)
assembly
Primary
10.5
charging
assembly
Separation
charging
assembly
External
charging
assembly
17.0
Table 13-217
Range
4 mm (approx.)
4 mm (approx.)
4 mm (approx.)
13-15