Checking The Printer Side (1/3) - Canon iR2200 Service Manual

CHAPTER 2 IMAGE ADJUSTMENT BASIC PROCEDURE
3

Checking the Printer Side (1/3)

Is there a
NO
vertical line in
the image?
YES
Clean the following:
[1]
Laser mirror
[2] No. 1 mirror
Is there a
NO
vertical line in
the image?
YES
Check the surface of the
Is there ea
developing sleeve by the naked eye.
vertical line in the
image?
YES
Is there a
NO
vertical line on the
Replace the drum unit.
surface of the
sleeve?
YES
Execute the following service mode:
COPIER>FUNCTION>DPC>D-GAMMA.
Generate 10 test prints of the
(initialization)
following in service mode:
COPIER>TEST>PG.
TYPE6 (solid black)
Is the setting of the
NO
following in service mode 485 µA:
Is there a
DISPLAY>HV-STS>
YES NO
line on the surface
PRIMARY?
of the sleeve?
YES
Replace the composite power supply PCB.
2-2 T
Is the image of TYPE6
YES
(solid black) on test prints correct in
density and free
of fuzziness?
NO
NO
Is the image fuzzy?
YES
Check the following,
and correct any fault:
[1] Feeding assembly for locking
[2] Transfer charging roller electrode
NO
Is the image
YES
density appropriate?
NO
Adjust the setting of the following in
service mode:
COPIER>ADJUST>DEVELOP>DE-DC.
• If the image is light, decrease the setting.
• If the image is dark, increase the setting.
Caution:
Be sure to vary the setting in
equal amounts.
Is the image
YES
density appropriate?
NO
Replace the developing assembly, and make image
adjustments under 1 Making Initial Checks.
4 Checking the Printer Side (2/3)
Check the image density by
generating test prints (TYPE5).
Is there an
appreciable difference
in density between left
and right of the
image?
YES
Clean the following:
[1] Laser mirror :
[2]
No. 1 mirror
Is there a difference
in density between left and
right of the image?
YES
Are both rear and
NO
Replace the pre-exposure
front of the pre-exposure
lamp unit.
lamp ON?
YES
Is the developing
NO
Lock it securely. If the locking
assembly securely locked
mechanism has a fault, replace it.
in place?
YES
Generate 10 test prints (TYPE6);
Is the coating of toner
YES
then, if the coating of toner on
on the developing
the developing sleeve is uneven,
sleeve uneven?
replace the developing assembly.
NO
Is the
Lock the feeding assembly
(transfer charging roller) feeding assembly
NO
securely; if the locking (transfer charging roller) locked
mechanism is faulty, replace the
securely in place?
transfer charging roller unit.
YES
Replace the laser scanner unit.
COPYRIGHT © 2001 CANON INC.
5 Checking the Printer Side (3/3)
Go to
Check the image density by
generating test prints (TYPE4). 2
NO NO
Are the printouts
foggy?
YES
Increase the setting of the following in
service mode:
COPIER>ADJUST>DEVELOP>DE-DC.
Caution:
Be sure to vary the setting in
equal amounts.
However, if the setting has already been
NO
changed under
3 Checking the Printer Side (1/3),
decrease the following in service mode:
COPIER>ADJUST>HV-PRI>P-DC.
Caution:
Be sure to vary the setting in
equal amounts.
Is the image density
YES
of the tense prints (TYPE6)
appropriate?
NO
Replace the developing assembly, and make image
adjustments under
1 Making Initial Checks.
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
Checking the Scanner Side.
YES
Is there a fault in
the copy image?
NO
End.