Canon iR C6800 Series Service Manual page 914

Chapter 13
Field Remedy
If this symptom is noted, go through the following flow of work to correct it:
Using the CA-1 Test
Sheet, execute auto
duplexing copying.
F-13-28
13-42
START
Perform step 1.
Using the CA-1 Test Sheet,
execute auto duplexing copying.
Is the fault*1 found on the
2nd side of the print?
Yes
Perform step 2.
Using the CA-1 Test Sheet,
execute auto duplexing copying.
Is the image on the print too light?
Yes
Perform step 3.
No
Execute auto gradation
correction (full) in user
mode.
END
No
Execute auto gradation
correction (full) in user
mode.
END