Solution - Konica Minolta bizhub C350 Service Manual

AD-501 Field Service Ver2.0 Sep. 2004
1.4

Solution

1.4.1 Duplex Unit transport section misfeed
A. Detection timing
Type
The Synchronizing Roller Sensor(PC28) is not blocked even after the lapse of a
given period of time after the Duplex Paper Take-up sequence started.
The Duplex Unit Transport Sensor 2 (PC1-DU) is not blocked even after the set
period of time has elapsed after the Duplex Unit Transport Sensor 1 (PI1-DU) is
Duplex Unit trans-
blocked by the paper.
port
The Duplex Unit Transport Sensor 1 (PI1-DU) is not unblocked even after the set
section misfeed
period of time has elapsed after the Duplex Unit Transport Sensor 1 (PI1-DU) is
detection
blocked by the paper.
The Duplex Unit Transport Sensor 2 (PC1-DU) is not unblocked even after the set
period of time has elapsed after the Duplex Unit Transport Sensor 2 (PC1-DU) is
blocked by the paper.
Detection of paper
The Duplex Unit Transport Sensor 1 (PI1-DU) or Duplex Unit Transport Sensor 2
remaining in the
(PC1-DU) are blocked when the Power Switch is set to ON, a door or cover is
Duplex Unit trans-
opened and closed, or a misfeed or malfunction is reset.
port section
B. Action
Synchronizing Roller Sensor (PC28)
Duplex Unit Transport Sensor 1 (PI1-DU)
Duplex Unit Transport Sensor 2 (PC1-DU)
Switchback Motor (M1-DU)
Duplex Unit Transport Motor (M2-DU)
Step
1 Initial check items
2 PC28 I/O, sensor check
3 PI1-DU I/O, sensor check
4 PC1-DU I/O, sensor check
5 M1-DU operation check
6 M2-DU operation check
7 PWB-A DU replacement
8 PWB-MC replacement
Relevant electrical parts
Action
Description
Duplex Control Board (PWB-A DU)
Control Board (PWB-MC)
WIRING DIAGRAM
Control signal
-
PWB-MC PJ12MC-6
PWB-A DU PJ1A DU-12
PWB-A DU PJ4A DU-3
-
-
-
-
Jam Display
Location
(Electrical compo-
nents)
-
R-2
H-4
C-2
D-8
H-2
F-5
-
4-3