Solution; Initial Check Items; Misfeed At Duplex Unit Reverse Drive/Storage Section - Konica Minolta magicolor 2400W Service Manual

Field Service Ver. 2.0 Apr. 2005
4.4

Solution

4.4.1

Initial Check Items

• When a paper misfeed occurs, first check the following initial check items.
Does the paper meet product specifications?
Is paper curled, wavy, or damp.
Is a foreign object present along the paper path, or is the
paper path deformed or worn?
Are the Paper Separator Fingers dirty, deformed, or
worn?
Are the rolls/rollers dirty, deformed, or worn?
Are the Edge Guide and Trailing Edge Stop at the cor-
rect position to accommodate the paper?
Are the actuators found operational when checked for
correct operation?
4.4.2

Misfeed at Duplex Unit reverse drive/storage section

A. Detection Timing
Type
Detection of mis-
The Duplex Transport Sensor (PC12 DU) is not unblocked even after the lapse of
feed at Duplex Unit
a predetermined period of time after the Duplex Reverse Motor (M9 DU) has been
reverse drive/stor-
energized for reverse drive.
age section
B. Action
Duplex Transport Sensor (PC12 DU)
Duolex Transport Motor (M8 DU)
Duplex Reverse Motor (M9 DU)
Step
1 Initial check items.
2 Check the PC12 DU sensor.
3 Check M8 DU for correct operation.
4 Check M9 DU for correct operation.
5 Change PWB-A DU.
6 Change PWB-A.
Check Item
Relevant Electrical Parts
Action
Action
Change the paper.
Change the paper.
Instruct the user in correct paper storage.
Clean or change the paper path.
Clean or change the defective Paper Separa-
tor Finger.
Clean or change the defective roll/roller.
Set as necessary.
Correct or change the defective actuator.
Description
Duplex Board (PWB-A DU)
Mechanical Control Board (PWB-A)
WIRING DIAGRAM
Control Signal
-
PWB-A DU PJ5A DU-3 (ON)
PWB-A DU
PJ2A DU-1~4 (pulse)
PWB-A DU
PJ2A DU-5~8 (pulse)
-
-
4. Jam Display
Location
(Electrical
Component)
-
3-C
5~6-C
5~6-C~D
-
-
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