Misfeed At Transfer Section - Konica Minolta bizhub c20 Service Manual

Field Service Ver. 1.0 Sep. 2008
17.3.4

Misfeed at transfer section

A. Detection timing
Type
The registration sensor (PS4) is not blocked even after the lapse of a given period
of time after the paper has unblocked PS4.
Detection of
The paper does not block the exit sensor/1 (PS8) even after the lapse of a given
misfeed at transfer
period of time after the paper has unblocked the registration sensor (PS4).
section
When a sheet of paper is passing through the registration sensor (PS4), the pres-
sure sequence of the 2nd transfer section has not started.
The registration sensor (PS4) is unblocked when the power switch is turned ON, a
Detection of paper
door or cover is opened and closed, or a misfeed or malfunction is reset.
left in transfer
The media loop sensor (PS6) is unblocked when the power switch is turned ON, a
section
door or cover is opened and closed, or a misfeed or malfunction is reset.
B. Action
Registration sensor (PS4)
Exit sensor/1 (PS8)
Media loop sensor (PS6)
2nd image transfer pressure/retraction clutch (CL5)
Step
1 Initial check items
2 PS4 sensor check
Make the sensor check of exit sensor/1
(PS8) and, if any abnormal condition is
3
found, replace the fuser unit with a new
one.
4 PS6 sensor check
5 CL5 operation check
6 Change PRCB.
Relevant electrical parts
Action
Description
Print control board (PRCB)
WIRING DIAGRAM
Control signal
⎯
PRCB PJ15-3 (ON)
⎯
PRCB PJ16-3 (ON)
PRCB PJ10-5 (REM)
⎯
17. Jam display
Location (electri-
cal component)
⎯
C to D-5
⎯
C to D-4
C to D-7 to 8
⎯
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