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6. Jam Display Field Service Ver. 1.0 Aug. 2005
14
Duplex Unit/
Switchback Unit
T
roubleshooting
6.3.3 Turnover Unit/Duplex Unit Transport Section Misfeed
A. Detection Timing
B. Action
Type Description
Turnover Unit/
Duplex Unit
Transport Section
misfeed detection
The Switch Back Unit Sensor (PC26) is not blocked even after the set period of
time has elapsed after the Paper Exit Sensor (PC4) is unblocked by the paper.
The Duplex Unit Upper Transport Sensor (PC24) is not blocked even after the set
period of time has elapsed after the Switch Back Unit Sensor (PC26) is blocked
by the paper.
The Switch Back Unit Sensor (PC26) is not blocked even after the set period of
time has elapsed after the Duplex Unit Upper Transport Sensor (PC24) is blocked
by the paper.
Detection of paper
remaining in the
Turnover Unit/
Duplex Unit
Transport Section
The Switch Back Unit Sensor (PC26) is blocked when the Main Power Switch is
set to ON, a door or cover is opened and closed, or a misfeed or malfunction is
reset.
The Duplex Unit Upper Transport Sensor (PC24) is blocked when the Main Power
Switch is set to ON, a door or cover is opened and closed, or a misfeed or mal-
function is reset.
Relevant electrical parts
Paper Exit Sensor (PC4)
Switch Back Unit Sensor (PC26)
Duplex Unit Upper Transport Sensor (PC24) Mechanical Control Board (PWB-A)
Step Operations
WIRING DIAGRAM
Control signal
Location
(Electrical
components)
1 Initial checks - -
2 PC4 sensor check PWB-A PJ18A-11 (ON) M-12
3 PC26 sensor check PWB-A PJ19A-9 (ON) M-5
4 PC24 sensor check PWB-A PJ20A-5 (ON) M-16
5 Replace PWB-A. - -