Solution; Initial Check Items; Paper Take-Up Section Misfeed - Konica Minolta bizhub C450 Service Manual

7. Jam Display
7.3

Solution

7.3.1

Initial check items

• When a paper misfeed occurs, first perform the following initial check items.
Does paper meet product specifications?
Is the 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 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 operating correctly?
7.3.2

Paper Take-Up section misfeed

A. Detection timing
Type
Misfeed due to
paper not reached Misfeed is detected if the Registration Sensor (PC1-DF) is not turned ON within a
the Registration preset time after the Take-up Motor (M1-DF) started normal rotation.
Sensor
Misfeed due to
Misfeed is detected if the Pick-up Sensor (PC2-DF) is not turned ON within a pre-
paper not reached
set time after the Take-up Motor (M1-DF) started reverse rotation.
the Pick-Up Sensor
B. Action
Registration Sensor (PC1-DF)
Pick-up Sensor (PC2-DF)
Take-up Motor (M1-DF)
Step
1 Initial check items
2 PC1-DF I/O, sensor check
3 PC2-DF I/O, sensor check
4 M1-DF operation check
5 PWB-A DF replacement
32
Check item
Relevant electrical parts
Action
Field Service Ver. 1.0 Mar. 2005
Action
Replace paper.
Replace paper.
Instruct the user on the correct paper storage
procedures.
Clean the paper path and replace if neces-
sary.
Clean or replace the defective Paper Separa-
tor Finger.
Clean or replace the defective roll/roller.
Set as necessary.
Correct or replace the defective actuator.
Description
Control Board (PWB-A DF)
WIRING DIAGRAM
Control signal
—
PWB-A DF CN7A-9 (ON)
PWB-A DF CN7A-12 (ON)
PWB-A DF CN5A-1 to 6
—
Location
(Electrical compo-
nents)
—
ADF G-5
ADF G-5
ADF B to C-6
—