Canon iR C6800 Series Service Manual page 905

Field Remedy
If this symptom is noted, go through the following flow of work to correct it:
Start
Execute auto gradation correction
(full) in user mode. *1
Is the yellow area of the output
image coarse?
Yes
Perform step 1.
Execute auto gradation correction
(full) in user mode. (*1)
Is the cyan area of the output
image coarse?
Yes
Perform step 2.
Is the copy image too light?
Yes
Perform step 3.
F-13-20
*1: Normally, as many as 3 copies are made in full mode of auto gradation correction. Here, however, stop full
correction when the 1st copy has been made to save on work time.
<Step 1>
Adjust the gamma correction table of the controller as follows:
1) Set "3" to the following in service mode: COPIER>OPTION>BODY>GLUTLV C.
2) Set "3" to the following in service mode: COPIER>OPTION>BODY>GLUTMX C.
No
END
No
END
No
END
Chapter 13
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