Canon iR C6800 Series Service Manual page 916

Chapter 13
5. Secondary Transfer ATVC Target Current Offset (2TR TGT1)
Set '0' and execute the following service mode item: COPIER>ADJUST>HV TR>2TR TGT1. (range of setting: 10
to +10; in 5 yA)
6. Secondary Transfer ATVC Paper Voltage Offset (2TR SHR1)
Set ' 3' and execute the following service mode item: COPIER>ADJUST>HV TR>2TR SHR1. (range of settings:
10 to +10; in 100 V)
Be sure to go through the foregoing 6 service mode items before executing the following items; for instance, to
decrease the transfer voltage by 300 V for low humidity, plain paper, 4C, auto duplexing:
COPIER> ADJUST> HT TR> TR ENV1 :1
COPIER> ADJUST> HT TR> TR PPR1 :1
COPIER> ADJUST> HT TR> TR CLR1 :2
COPIER> ADJUST> HT TR> TR DUP1 :2
COPIER> ADJUST> HT TR> 2TR TGT1 :0
COPIER> ADJUST> HT TR> 2TR SHR1 : 3
<Step 2>
Adjust the color balance using the following 4 service mode items, thus decreasing the density of individual colors:
1. Y Color Balance Adjustment
Set ' 3' and execute the following service mode item: COPIER>ADJUST>COLOR>ADJ Y. (range of settings: 8 to
+8)
2. M Color Balance Adjustment
Set ' 3' and execute the following service mode item: COPIER>ADJUST>COLOR>ADJ M. (range of settings: 8
to +8)
3. C Color Balance Adjustment
Set ' 3' and execute the following service mode item: COPIER>ADJUST>COLOR>ADJ C. (range of settings: 8 to
+8)
4. K Color Balance Adjustment
Set ' 3' and execute the following service mode item: COPIER>ADJUST>COLOR>ADJ K. (range of settings: 8 to
+8)
<Step 3>
If the copy image is too light, set the service mode items (color balance adjustment) used in step 2 to ' 1' or ' 2'.
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