2.1.13 Paper wrinkle at duplex printing
(1) Symptom
Paper wrinkle occurs during duplex printing.
(2) Cause
Depending on the paper type and moisture in the paper, the curl becomes larger after
printing on the 1
st
side. Consequently, the paper lead edge of the 2
nd
side cannot enter to
the fusing unit stably and wrinkle occurs.
(3) Solution
1. Change De-curler setting
Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment.
Paper curl direction changes according to the paper characteristic. Therefore, check
the printed paper and decide the optimum setting from 0, +1 or +2.
[Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Output Curl (Back on
Top)]
2. Adjust fusing temperature
[Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Upper Fusing Roller
Temperature]
Reduce temperature for respective trays.
The target of the adjustment is to reduce by 10°C (Max is 20°C). Gradually reduce the
temperature.
Note:
To prevent toner from detaching, set the temperature which does not cause fusing
under offset. To confirm, print 20 sheets of test pattern #69.
3. Change the paper which is just unpacked (low moisture content paper)
4. If the above steps do not solve the symptom, ask customer to use another type of
paper.
5. Replace with [Guide Plate/B (A50U758201)].
Note
When replace old type Guide plate (A50U747402) with [Guide Plate/B] of new type,
also replace following parts together because old and new are not compatible.
Insulating Plate /Front (A50U7448912)
Insulating Plate /Front (A50U749112)
Fusing Roller/1 (A50U720111)
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