Konica Minolta bizhub C450 Service Manual page 582

Field Service Ver. 1.0 Mar. 2005
7.3.2 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
blocked by the paper.
Duplex Unit trans-
port section mis-
The Duplex Unit Transport Sensor 1 (PI1-DU) is not unblocked even after the set
feed detection
period of time has elapsed after the Duplex Unit Transport Sensor 1 (PI1-DU) is
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 Main Power Switch is set to ON, a door or cover
Duplex Unit trans- is 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 PJ24MC-6 (ON)
—
—
PWB-A DU PJ3A-1 to 4
PWB-A DU PJ2A-1 to 4
—
—
7. Jam Display
Location
(Electrical compo-
nents)
—
C450 C to D-3
—
—
Duplex Unit
C to D-5
Duplex Unit
C to D-5
—
—
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