Checking The Scanner Side - Canon iR2200 Service Manual

Making Initial Checks
1
Requirements:
1. Use paper fresh out of package.
(Moist paper will not allow correct
evaluation of images.)
2. Use paper with the highest degree of
"whiteness," of all available papers.
3. Use A3 paper (11x17), if possible.
Execute 'roller clean' in user mode
('adjust/clean').
Reference:
The following will be cleaned:
Primary charging roller
[1]
[2] Transfer charging roller
Clean the separation static eliminator.
Is the setting of
NO
'exposure recalibration'
under 'adjust/clean' in user
mode the middle
setting?
YES
Is '5' indicated for
ADJUST>DENS>DENS-ADJ
in user mode?
YES
Does the five
items on the right in
service mode match the settings
indicated on the
service label?
Output Condition
YES
F value=5
Using the NA3 Test Chart, make 2 copies
in the following:
[1] Text mode
Reference: At optimum density, the copy
image should barely show
gray scale No. 0.
Generate 2 test prints each of the following in
COPIER>TEST>PG:
[1] TYPE4 (blank)
[2] TYPE5 (halftone)
[3] TYPE6 (solid black)
If the copy image has a fault,
Go to

Checking the Scanner Side.

2
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
2
Check/clean the following:
Mirrors
[1]
[3] Standard white plate
[5] Scanning lamp
Execute the following in service mode:
COPIER>FUNCTION>CCD>CCD-ADJ.
Set it to the
middle setting.
NO
Set it to '5'.
Change the shading position. (Note 1)
NO
Enter the settings
indicated on the
service label.
In service mode COPIER>ADJUST,
1. AE>AE-TBL
2. DEVELOP>DE-DC
3. DEVELOP>DE-OFST
4. HV-PRI>P-DC
5. HV-PRI>OFST1-DC
Note 1: In units of 8s, increase or decrease
If the test print has a fault,
Go to
3 Checking the Printer Side (1/3).
Checking the Scanner Side
Lens
[2]
[4] Copyboard glass
[6] Reflecting plate
Make a copy in text mode.
Is there a
NO
vertical line in the
image?
YES
If a line occurs only
when the ADF is used,
Make a copy in text mode.
Make a copy in text mode.
Is there a
NO
vertical line in
Is there a
the image?
vertical line in
the image?
YES
YES
Clean the original reading
face of the ADF.
Is there a
NO
vertical line in Is there a
YES
the image?
vertical line in
the image?
YES
Clean the copyboard glass.
(white plate position)
Reference:
Varying the setting of DENS-ADJ
affects the density of all following
Is there a copying modes:
NO
vertical line in
• Auto
the image?
• Text
• Text/photo
• Photo (print photo/film photo)
YES
Vary the setting in service mode:
Change the shading position.
COPIER>ADJUST>DENS>DENS-ADJ.
• If the image is dark, decrease the setting.
• If the image is light, increase the setting.
the setting of FUNCTION>CCD
>SHDG-POS. Then, execute
FUNCTION>CCD>SH-PS-ST to see
that 'OK!' is indicated.
Is the copy
image density
normal?
NO
Go to
3 Checking the Printer Side (1/3).
CHAPTER 2 IMAGE ADJUSTMENT BASIC PROCEDURE
Go to
5 Checking the Printer Side (3/3).
Is the white
NO
background of the
copy foggy?
YES
Vary the setting in service mode:
COPIER>ADJUST>AE-AE-TBL.
• If the image is dark, decrease
Execute shading in service mode:
the setting.
FUNCTION>CCD>CCD-ADJ.
• If the image is light, increase
the setting.
YES
Is the image foggy?
NO
Is the density
YES
of the copy image Make a copy in AE mode.
normal?
NO
Vary the setting in service mode:
NO
COPIER>ADJUST>DENS>DENS-ADJ.
• If the image is dark, decrease the setting.
• If the image is light, increase the setting.
Set '5' to the following in service mode:
COPIER>ADJUST>DENS>DENS-ADJ.
NO
Execute the following in service mode:
COPIER>FUNCTION>DENS. Is the setting of the
NO following in service mode
1. WHITE-ME
2. PD-DENS
DISPLAY>HV-STS>
3. PD-ME
Replace the drum unit;
then, execute the following in
service mode: COPIER>
FUNCTION>DPC>D-GAMMA.
Is the copy
NO
image density in text
mode normal?
NO
the following in service mode
DISPLAY>HV-STS>
YES
YES
End.
Replace the composite
power supply PCB.
End.
NO
Is the copy
YES
density normal?
YES
Is the copy
image density
normal?
NO
485 µA or higher:
PRIMARY?
YES
Is the setting of
485 µA or higher:
PRIMARY?
YES
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