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CHAPTER 3 IMAGE TROUBLESHOOTING
12. The copy has white spots (cross feed direction).
Cause Step Checks YES/NO Remedies
Copy paper 1 Is the copy paper of a type rec-
ommended by Canon?
NO Try recommended paper;
if the results are good,
advise the user to use
recommended paper.
2 Try copy paper fresh out of
package.
Is the problem corrected?
YES The copy paper may be
moist; advise the user to
store it wrapped.
3 Is the problem noted at the same
position on all copies?
YES Check the copyboard rail
for foreign matter.
Copyboard rail
Check the scanning lamp
for flickering, and check
the presence/absence of a
developing bias.
Scanning lamp,
Developing bias
NO
13. The back of the copy is soiled.
Cause Step Checks YES/NO Remedies
Transfer charging
assembly
1 Press the Copy Start key, and
switch the copier OFF while the
copy paper is moving through
the feeding assembly.
Is the back of the copy soiled?
NO Go to step 3.
2 Is the transfer charging assem-
bly soiled?
YES 1. Clean the transfer
charging assembly.
2. Clean the registration
roller.
3. Clean the pick-up guide
plate.
4. Check the cartridge for
leakage of toner.
Feeding assembly 3 Is the feeding assembly soiled? YES Clean the feeding
assembly.
Delivery roller NO Clean the delivery roller.