Konica Minolta bizhub 20 Service Manual page 118

■ Paper jam in the back cover and paper eject section
Step Cause
Foreign object
1
around fuser unit
Paper eject
2 actuator failure
Fuser cover ASSY
3
loose
Outer chute ASSY
4
loose
Eject roller 1
malfunction
5
Paper eject
6 sensor failure
Main PCB failure
7
■ Paper jam in the tray 2
Step Cause
Tray 2 edge
1 actuator catching
on some position
Tray 2 sensor
2 PCB ASSY failure
Tray 2 solenoid
3 failure
■ Paper jam in the Duplex unit section
Step Cause
Duplex unit failure
1
Check
Is there a foreign object
around the fuser unit?
Does the paper eject
actuator move smoothly?
Is it damaged?
Is the fuser cover ASSY
fitted correctly?
Is the outer chute ASSY
fitted correctly?
Is the eject roller 1 of the
rear chute ASSY attached
to the pinch roller
properly?
Is the problem solved
after replacing the relay
rear PCB?
Is the problem solved
after replacing the Main
PCB ASSY?
Check
Does the tray 2 edge
actuator move smoothly?
Is the problem solved
after replacing the tray 2
sensor PCB ASSY?
Is the problem solved
after replacing the tray 2
solenoid?
Check
Is the problem solved
after replacing the Duplex
unit?
3-43
Result Remedy
Remove the foreign
Yes
object.
Replace the paper eject
No actuator.
Fit the fuser cover ASSY
No
correctly.
Fit the outer chute ASSY
No
fitted correctly.
Replace the rear chute
ASSY.
No
Replace the relay rear
Yes PCB ASSY.
Replace the Main PCB
Yes ASSY.
Result Remedy
Re-assemble the tray 2
No edge actuator.
Replace the tray 2 sensor
Yes PCB ASSY.
Replace the tray 2
Yes solenoid.
Result Remedy
Replace the Duplex unit.
Yes
Confidential