Canon ImageRunner iR8500 Series Service Manual page 914

Chapter 17
<CCD>
Sub-item
Making CCD- and Shading-Related Adjustments
If faulty images are noted after executing COPIER>FUNCTION>CCD>CCD-ADJ, enter the settings
indicated on the service label.
SH-TRGT
SH-RATIO
EGGN-ST
EGGN-END
<LASER>
Sub-item
Adjusting the Laser Output
If you have cleared the RAM on the DC controller PCB, be sure to enter the settings indicated on the service
label.
PVE-OFST
LA-DELAY Entering a delay value after laser unit displacement (Matching the laser main scan)
LA-PWR-A Use it to enter the power adjustment value for the laser A.
LA-PWR-B
DLY-FINE
<DEVELOP>
Sub-item
DE-DC
DE-NO-DC
17-70
COPIER > ADJUST > CCD
Use it to enter the white level target value for shading correction. 130 to
255
Use it to enter the data on the white level ratio (standard white paper and
standard white plate) for shading correction. 150 to 300
Use it to enter an adjustment value for the edge gain correction start posi-tion
for the CCD. 100 to 250
Use it to enter an adjustment value for the edge gain correction end position
for the CCD. 100 to 250
COPIER > ADJUST > LASER
Use it to adjust the position of laser projection.
<Setting range> -300 to 300
- A higher value moves the spot toward the rear.
- A smaller value moves the stop to the front.
The laser A spot moves in keeping with the laser B spot.
<Setting range> 0 to 4807
Enter the delay value peculiar to the unit affixed to the unit at laser unit
replacement.
<Setting range> 0 to 255
If you have replaced the laser unit, enter the power adjustment value for the laser A
indicated on the label attached to the unit.
Use it to enter the power adjustment value for the laser B.
<Setting range> 0 to 255
If you have replaced the laser unit, enter the power adjustment value for the laser B
indicated on the label attached to the unit.
Use it to fine-adjust the displacement of the laser A or laser B.
<Setting range> -16 to 16
COPIER > ADJUST > DEVELOP
Use it to enter the DC output value for image formation.
<Setting range> 0 to 600
There are cases that the actual input and the indication after input do not match.
Use it to enter the development DC output value for non-image formation.
<Setting range> 0 to 600
There are cases that the actual input and the indication after input do not match.
T-17-58
Description
T-17-59
Description
T-17-60
Description
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