Troubleshooting Image Faults; Making Initial Checks - Canon CP660 Service Manual

CHAPTER 10 TROUBLESHOOTING
II. TROUBLESHOOTING IMAGE FAULTS
A.

Making Initial Checks

1. Site Environment
a. The voltage must be as rated (±10%).
b. The machine must not be in a high-temperature/-humidity environment (near water
faucet, water boiler, humidifier), or it must not be in a cold place. There must not be a
source of fire nearby, and the machine must not be subjected to excess dust.
c. The machine must not be subjected to ammonium gas.
d. The machine must not be exposed to direct sunshine. As necessary, curtains must be
provided.
e. The room must be well ventilated.
f. The machine must be kept level.
g. The power plug of the printer unit must be connected to the power outlet. However, if
the reader unit is installed, the power plug of the printer unit must be connected to the
reader unit and the power plug of the reader unit must be connected to the power out-
let.
2. Checking the Originals
Check the problem to find out whether it is caused by the original or the machine.
a. Checking the Density of the Original
A diazo original or an original with a high transparency can produce prints that can be
mistakenly thought of as being "foggy."
An original prepared in light pencil can produce prints that can be mistakenly thought
of as being "too light."
3. Checking the Assemblies
a. Check the secondary pre-transfer charging assembly and the separation static elimi-
nator for dirt and faults (scratches, deformations).
b. Clean the cleaning wires of the secondary pre-transfer charging assembly and the
separation static eliminator. Also, clean the density sensor and the pre-exposure LED
assembly.
c. Check to make sure that the following are mounted properly: intermediate transfer
drum unit, fixing assembly, ITD cleaning roller, secondary transfer belt assembly,
toner cartridge, and drum cartridge.
4. Checking the Paper
a. Is the paper of a type recommended by Canon?
b. Is the paper moist? Try paper fresh out of package.
10-10
COPYRIGHT © 1999 CANON INC.
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CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)