Thin Paper Jams Wrapping Around The Fusing Belt (Separation Failure) - Konica Minolta bizhub PRO C6501 Troubleshooting Manual

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Thin paper jams wrapping around the fusing belt
(separation failure)
[Symptom]
When printing image where 2 or more colors (red, blue, green, etc.) are overlapped and much
amount of toner attaches on coated paper, paper wraps around the fusing belt and jams.
[Available thin paper with C6500 series]
Under NN environment, paper that can be separated with no problem with 2 or more
overlapped color (red, blue, green) solid image is as follows. (rough indication).
Caution:
Though 2 or more colors solid cannot be separated, usual practical graphic image can be
separated in some cases. Therefore, please judge carefully according to the usage of
customer.
Additionally, if the solid part is at far from leading edge of the paper, the separation is rather
easier.
1) Normal paper: no fusing wrapping jam with 80gsm or heavier paper
2) Electrophotographic coated paper:
[Japan] no fusing wrapping jam with 100gsm or heavier paper.
[USA, Europe] no fusing wrapping jam with 120gsm or heavier paper
3) Coated paper for printing:
Short grain (paper grain is the same as the paper feeding direction): no fusing wrapping
jam with 105gsm or heavier paper.
Long grain (paper grain is the vertical to the paper feeding direction): no fusing wrapping
with 128gsm or heavier
[Solution]
1) If the coated paper for printing and electrophotographic coated paper with short grain
(paper grain is the same direction as the paper feeding direction) is available, use it.
Caution:
a) Not much type paper with short grain is available other than Japan.
b) When using the short grain paper, if making duplex copy, slight wrinkle may appear
at the paper exit decurler part. In that case, change DipSW 4-4 from 0 to 1 or
reduce fusing temperature from Paper setting:
Change dipswitch 1-0 (To display process adjustment to user screen) from 0(Default)
to 1. Then, [Process adjustment] key is accessible from COPY (or MACHINE)
screen. Access (COPY (MACHINE) => [Paper Setting] => [Change] => [Process
adjustment] => [Next] => [Upper roller Temperature] and [Lower roller temperature].
Reduce both rollers temperature. The target for the temperature adjustment is
10°C and (max. 20°C) and the temperature should be reduced gradually.
2) When controller property => [Image] => [Toner reduction] is set, the max attaching toner
amount is decreased and the separation ability is increased. However, please note that
the toner density decreases.
3) Perform the following adjustment to reduce the toner quantity.
[Utility/Counter] => [03 Machine Admin. Setting] -> [01 System Setting] -> [05 Expert
Setting] -> [06 Process Adjustment] -> [03 Toner Quantity/Exposure]
Lower [Maximum toner quantity] of yellow, magenta, cyan and black.
If the above action could not resolve the jam occurrence or the customer cannot be satisfied
with the image density after adjustment, instruct the customer to use other type of paper.
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