Checking The Copyboard Cover, Copyboard Glass, And Standard White Plate For Dirt And Scratches; Checking The Charging Wires; Checking The Developing Assembly; Checking The Paper - Canon iR8500 Servise Manual

3.1.3 Checking the Copyboard Cover, Copyboard Glass, and Standard
White Plate for Dirt and Scratches
If any of the these parts is soiled, clean it with a solution of mild detergent or alcohol. If
scratches are found, replace it.

3.1.4 Checking the Charging Wires

a. Check the charging assemblies for dirt and faults (e.g., scratches).
b. Clean the charging wires of the charging assemblies, and clean the shielding plate. (If
the dirt cannot be removed, replace it.)
c. Check the type and the height of each charging wire.
d. Check to make sure that the charging assemblies are securely set.
e. Check the charging wire spring for rust.
f. Check the charging wire cleaning pad (each charging assembly) for displacement.

3.1.5 Checking the Developing Assembly

a. Check to make sure that the support members on both ends of the developing assembly
are in contact with the drum.
b. Check to make sure that there is an even coating of toner on the surface of the develop-
ing cylinder.
c. Check the connection between the developing assembly and the machine.

3.1.6 Checking the Paper

a. Check to make sure that the paper is of a type recommended by Canon.
b. Check to make sure that the paper is not miost. Try copy paper fresh out of package to
make copies.

3.1.7 Checking the Periodically Replaced Parts

Replace those parts that have reached the ends of their lives by referring to the Scheduled
Servicing Chart and the Periodically Replaced Parts Chart.

3.1.8 Others

In winter, moving a machine from a cold to warm place can cause condensation inside it,
leading to various problems.
a. Condensation on the optical system (e.g., glass, mirror, lens) can cause
darker images.
REF.
b. Condensation on the charging system can cause electrical leakage.
c. Condensation on the pickup/feeding guide can cause poor paper feeding.
If condensation is noted, dry wipe the parts or leave the machine alone for
60 min while powered.
If the density is uneven (between front and rear), the image is too light, or
the image is foggy, perform the Image adjustment Basic Procedure first.
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500 REV.0 MAR. 2001
CHAPTER 6 TROUBLESHOOTING
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