Chapter 2 Image Adjustment Basic Procedure; Making Lnitial Checks; Checking The Scanner Side - Canon iR2200 Service Handbook

CHAPTER 2 IMAGE ADJUSTMENT BASIC PROCEDURE

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:
[1] Primary charging roller
[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
NO
ADJUST>DENS>DENS-ADJ
in user mode?
YES
Does the five
items on the right in NO
Enter the settings
service mode match the settings
indicated on the
indicated on the
service label? 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 Go to
2

Checking the Scanner Side.

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