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CHAPTER 10 TROUBLESHOOTING
III. IMAGE TROUBLESHOOTING
A.
Initial Check
1.
Checking the Installation Environment
a. The line voltage should be within 10% of the voltage on the rating plate.
b. The copier should not be installed in a hot or humid location (such as near a water faucet or
humidifier), a cold area, near an open flame, or in a dusty location.
c. Do not install the copier in a location where ammonia gas is generated. (diazo copiers, etc.)
d. Do not install the copier in direct sunlight. If such a location is unavoidable, install curtains or
other means to block out sunlight.
e. Install the copier in a well-ventilated location.
f.
Install the copier where it can be set level.
2.
Check the Original
Determine if the trouble is due to the original or a malfunction of the copier.
a. The copy density lever should normally be set to 4.5 ± 1.5.
b. Check if the original has a background color, such as yellow, which causes poor contrast.
c. Check the density of the original.
Examples:
Originals which are diazo copies or transparent originals ... Copies are likely to be mistak-
enly judged as being foggy.
Pencil originals ... Copies are likely to be mistakenly judged as having a light image.
3.
Check the Copyboard Cover or the Copyboard Glass
If the cover or glass is dirty, clean it with a mild detergent or with alcohol. If there is damage,
replace the damaged part.
4.
Check Corona Assemblies
a. Check for dirt on the corona assemblies or abnormalities (such as scratches) on the corona
wires.
b. Clean the corona wires and shield plates of each corona assembly. (Replace the wires if the dirt
cannot be removed.)
c. Ensure that each corona assembly is installed correctly.
d. Make sure that the corona wire tension springs are not rusted.
5.
Check the Transfer Feed Guides
If the transfer guides or feed guides are dirty, clean them with a damp cloth.
6.
Check the Fixing Assembly
7.
Check the Static Charge Eliminator
10-22
COPYRIGHT © 1999 CANON INC.
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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Chapters
Table of Contents
Troubleshooting
