Electrical Component Defects
D017/D018/D019/D020/D084/D085 6-23 SM
Trouble -
Shooting
ID Sensor 321-1 BCU
Open
SC392 is displayed (see
note)
Shorted
Interchange/Inverter
Sensor
331-9 BCU
Open
The Paper Jam indicator will
light whenever a copy is
made.
Shorted
The Paper Jam indicator
lights even if there is no
paper.
Lower Relay Sensor 308-4 BCU
Open
The Paper Jam indicator will
light whenever a copy is
made.
Shorted
The Paper Jam indicator
lights even if there is no
paper.
New PCU Detect
Sensor
327-6 BCU
Open
The TD sensor initial setting
procedure is not performed
when a new PCU is
installed.
Shorted
The TD sensor initial setting
procedure is performed
whenever the front cover is
closed.
Paper End Sensor
(Bypass)
860-3 BCU
Open
The Paper End indicator
lights even if paper is placed
in the 1st paper tray.
Shorted
The Paper End indicator
does not light even if there
is no paper in the 1st paper
tray.
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