Solution; Initial Check Items; Misfeed At Tray 2 Paper Feed Section - Konica Minolta bizhub c20 Service Manual

Field Service Ver. 1.0 Sep. 2008

17.3 Solution

17.3.1

Initial check items

• When a paper misfeed occurs, first make checks of the following initial check items.
Does paper meet product specifications?
Is paper curled, wavy, or damp.
Is a foreign matter present along the paper path, or is
the paper path deformed or worn?
Are rolls/rollers dirty, deformed, or worn?
Are the edge guide and trailing edge stop at correct
position to accommodate the paper?
Are actuators found operational as checked for correct
operation?
17.3.2

Misfeed at tray 2 paper feed section

A. Detection timing
Type
Detection of
The paper does not unblock the registration sensor (PS4) even after the lapse of a
misfeed at tray 2
given period of time after the tray2 media feed clutch (CL1) is turned ON.
paper feed section
B. Action
Registration sensor (PS4)
Tray2 media feed clutch (CL1)
Transport motor (M3)
Step
1 Initial check items
2 PS4 sensor check
3 CL1 operation check
4 M3 operation check
5 Change PRCB.
Check item
Relevant electrical parts
Action
Action
• Change paper.
• Change paper.
• Instruct user in correct paper storage.
• Clean or change the paper path.
• Clean or change the defective roll/roller.
• Set as necessary.
• Correct or change the defective actuator.
Description
Print control board (PRCB)
WIRING DIAGRAM
Control signal
⎯
PRCB PJ15-3 (ON)
PRCB PJ6-4 (REM)
PRCB PJ11-1 to 7
⎯
17. Jam display
Location (electri-
cal component)
⎯
C to D-5
C to D-16
L-4
⎯
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