Uneven Density On The Second Side Of A Black Halftone Image - Canon imagePRESS C10000VPSeries Troubleshooting Manual

Uneven density on the second side of a black halftone image

[Symptom]
Uneven density [a] may appear on the second side of a black halftone image.
The arrow [b] indicates the direction of feeding.
[Cause]
After the first side has passed through the fixing assembly, the paper may have wavy curls [a].
If printing in two-sided mode on the paper sheet with the wavy curls, it allows gaps between the ITB and the sheet during the
secondary transfer, toner scatters in the gaps and results in the aforementioned symptom.
[Service work]
1) Have the customer log in from System Management Mode in user mode.
2) Go to Select Settings/Registration > Paper Settings > Paper Type Management Settings, select an appropriate paper type
from among the list, press "Duplicate" button and then "OK" button.
3) Enter any name as the duplicated paper type and press "OK" button.
4) Select the paper type duplicated in the step 3) and press "Details/Edit".
5) Select "Adj. Sec. Transfer Belt Speed" and press "Change".
[Note] In case Adj. Sec. Transfer Belt Speed will not be displayed on the control panel, change the setting value of Service Mode
> Mode List > COPIER > Option > DSPLY-SW > IMGC-ADJ to "1" and perform a power-cycle of main power (off/on). The value
is "0" by default.
6) Change the setting parameter of " Adj. Sec. Transfer Belt Speed" to "+3".
The setting range is from "-3" to "+3" ("0" by default).
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