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Copier Color | iR-ADV C3530/C3525/C3520 Series |
Image blanking on the trailing edge of the second side of sheet
with heavy paper under a low humidity environment
[Symptom]
When a heavy paper is used under a low humidity environment, image blanking [a] may occur on the trailing edge of the second
side of the sheet.
This symptom does not occur when the trailing edge margin of the second side is 4mm or more.
The arrow [b] indicates the direction of feeding.
[Cause]
If the trailing edge of paper flaps when it passes through the guide [a] just before the secondary transfer assembly, a tiny space
[d] may be formed between the trailing edge [b] of paper just in front of the nip of the secondary transfer roller and ITB [c].
If electricity is discharged in this space, polarity of toner on ITB changes and the toner will not be transferred onto the paper. This
results in the above mentioned symptom.
This symptom is likely to occur when a rigid and thick coated paper is used under a low humidity environment where the set value
of the secondary transfer voltage is high.
[Service work]
Choose and perform among the below a), b) and c) according to the conditions under which the customer is operating.
a) Widen the trailing edge margin of the sheet
a-1) Increase the setting value of Service mode > Mode List > COPIER > Adjust > BLANK > [BLANK-B].
Change of the adjustment value by "1" increases the trailing edge margin of the sheet 0.04mm.
The range of setting is from "0" to "1000"
[Caution] Change of the setting increases the trailing edge margins of all the output with a media other than "thin paper/recycled
paper 2".
a-2) Output the image having shown the symptom, and check that the symptom does not occur.
If the symptom has not improved sufficiently, fine-tune the setting values in the steps a-1)
b) Extend the range where trail edge weak bias is applied.
3
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