Solution - Konica Minolta bizhub 250 Service Manual

Field Service Ver. 1.0 Aug. 2005
6.3

Solution

6.3.1 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?
6.3.2 Duplex Unit Take-Up Section Misfeed
A. Detection Timing
Type
Duplex Unit The Synchronizing Roller Sensor (PC1) is not blocked even after the set period of
Take-Up Section time has elapsed after the Duplex Unit Lower Transport Sensor (PC25) is blocked
misfeed detection by the paper.
Detection of paper
The Duplex Unit Lower Transport Sensor (PC25) is blocked when the Main Power
remaining in the
Switch is set to ON, a door or cover is opened and closed, or a misfeed or mal-
Duplex Unit
function is reset.
Take-Up Section
B. Action
Synchronizing Roller Sensor (PC1)
Duplex Unit Lower Transport Sensor (PC25)
Step
1 Initial checks
2 PC1 sensor check
3 PC25 sensor check
4 Replace PWB-A.
EDNord - Istedgade 37A - 9000 Aalborg - telefon 96333500
Check item
Relevant electrical parts
Operations
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
Mechanical Control Board (PWB-A)
WIRING DIAGRAM
Control signal
-
PWB-A PJ11A-5 (ON)
PWB-A PJ22A-14 (ON)
-
6. Jam Display
Location
(Electrical
components)
-
M-8
D-7
-
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