Canon ImageRunner iR8500 Series Service Manual page 940

Chapter 17
Sub-item
CCD-ADJ
LUT-ADJ
LUT-ADJ2
<LASER>
17-96
COPIER > FUNCTION > CCD
Automatically adjusting CCD
<Operating procedure>
1) Place about 10 or more sheets of standard white paper (whitest paper used by the user,
excluding color print paper) on the document table.
2) Select <CCD-ADJ> to reverse its display. Then press the OK key.
3) Adjustment is executed automatically (about 15 seconds). During adjustment,
<ACTIVE> is displayed at the upper right of the screen.
4) The LED lamp (for document lighting) lights twice and the automatic adjustment ends
with <OK> displayed on the screen.
5) Since all items are updated in this service mode (COPIER>ADJUST>CCD), enter the
values into the service label.
(rear)
Standard white paper
Use it to execute CCD gain simplified correction.
MEMO:
- After executing CCD-ADJ, execute this mode to adjust the density along the middle of
images.
- Be sure to execute CCD-ADJ before executing this mode.
<Using the Mode>
1) Select the item, and press the OK key.
2) Execute auto adjustment.
3) See that the machine automatically stops after adjustment.
4) All items under the following are updated; print out a service sheet, and store it away:
COPIER> ADJUST> LAMP, COPIER> ADJUST> CCD.
Use it to execute CCD gain detail correction.
- If the density is not corrected using LUT-ADJ (CCD gain simplified correction), execute
this mode using the 10-gradation chart.
<Using the Mode>
1) As shown, place the 10-gradation chart (D-10 Test Sheet) on the copyboard glass.
2) Select the item, and press the OK key.
3) See that the machine executes auto adjustment.
4) See that the machine stops automatically after adjustment.
5) All items under the following are updated; print out a service sheet, and store it away:
COPIER> ADJUST> LAMP, COPIER> ADJUST> CCD.
Place the chart so that the side
with gradation faces down.
T-17-104
Description Level
1
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