Troubleshooting Image Problems; Initial Checks; Checking The Site Of Installation; Checking The Originals - Canon CLC5000 Service Manual

CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3 Troubleshooting Image Problems

3.1 Initial Checks

3.1.1 Checking the Site of Installation

a. Make sure that the voltage at the power source is as rated (±10%).
b. Make sure that the site is not subject to high temperature/humidity (near a water faucet,
water boiler, humidifier) and is not cold, not close to a source of fire, and not subject to
dust.
c. Make sure that the site is not subject to ammonium gas.
d. Make sure that the site is free of direct rays of the sun; otherwise, curtains are provided.
e. Make sure that the room is well ventilated.
f. Make sure that the machine is kept level. Make the above checks to see if the site meets
the requirements.

3.1.2 Checking the Originals

Try to find out whether the problem is due to the type of original used or to the machine.
a. Check the density of the originals; a diazo copy original or an original with transparency
can produce copies that tend to be mistaken for "foggy copies"; and originals prepared
in light pencil tend to produce copies that tend to be mistaken for "light image copies."
3.1.3 Checking the Copyboard Cover, Copyboard Glass, and Standard
White Plate
Check the copyboard cover, copyboard glass, and standard white plate for dirt. Clean the
part if soiled, and replace the part if damage is found.

3.1.4 Checking the Charging Assemblies

a. Check each of the charging assemblies for dirt. Check the charging wire/grid plate for a
fault (damage, deformation).
b. Check shield plate of each charging assembly. (If necessary, dry wipe the part with lint-
free paper; then, use alcohol. If the dirt cannot be removed, replace the part.)
c. Check the height of each charging wire.
d. Make sure that each charging assembly is properly set.
e. Check the charging spring (especially of the separation charging assembly) for rusting.

3.1.5 Checking the Developing Assembly

a. Check to make sure that the surface of the developing cylinder is covered with a uniform
coating of toner.

3.1.6 Checking the Paper

a. Check if the paper is of a type recommended by Canon.
b. Check if the paper is moist.
Try making copies using fresh paper.
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COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001