The Copy Is Too Light (Including Solid Black) - Canon iR2200 Service Manual

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.2 The copy is too light (including solid black).

1) Perform the Image Adjustment Basic Procedure. Is the problem cor-
rected?
Check to make sure that the placement of the pattern print when the follow-
ing is executed in service mode is correct: FUNCTION>DENS>PD-ME.
YES: End.
2) Turn off the main power switch in the middle of copying operation, and
open the front cover. Is the toner image on the photopositive drum before
transfer more or less normal?
NO:
Feeding unit (Transfer charging roller)
3) Is the feeding unit locked in place correctly?
NO:
4) Is there electrical leakage around the electrode of the feeding unit?
YES: Check the electrode of the feeding unit.
5) Is there dirt, cracking, or scratching on the transfer charging roller?
YES: Replace the transfer charging roller.
6) Are the position and the condition of the transfer charging roller locking
spring normal?
NO:
Paper (transfer faulty)
7) Try paper fresh out of package. Is the problem corrected?
YES:
•
•
4-8 T
COPYRIGHT © 2001 CANON INC.
Go to step 7.
Check the transfer charging roller pressure spring.
Correct the position of the spring, or replace the spring.
The paper may be moist. Advise the user on the correct method of
storing paper.
Advise the user that the use of paper not of a recommended type
may fail to produce poor images.
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001