One of the conditions is detected:
The return sensor does not switch on
within 10 sec. after the rear fence mo-
tor switches on.
The HP sensor does not switch on 10
sec. after the rear fence motor switches
on.
The HP sensor and return sensor switch
on at the same time.
• Rear fence motor defective or poor con-
nection
• Paper or other obstacle interfering with
operation of the sensors
• Paper or other obstacle trapped between
tray and motor
• Motor mechanical overload due to ob-
struction
• Return sensor or HP sensor defective or
dirty
Note
• This problem will not issue the SC code on
the operation panel.
• The machine will prompt the operator to
reset tray by opening and closing it.
• If the problem persists, the machine will
display again and the tray cannot be used.
520 C
Duplex jogger motor error 1
When the jogger fence moves to the
home position, the jogger HP sensor
does not turn on even if the jogger
fence motor has moved the jogger
fence 153.5 mm.
• Paper or other obstacle has jammed
mechanism
• Sensor connector disconnected or defec-
tive
• Sensor defective
521 C
Duplex jogger motor error 2
When the jogger fence moves from the
home position, the jogger fence HP
sensor does not turn off even if the jog-
ger motor has moved the jogger fence
153.5 mm.
• Paper or other obstacle has jammed
mechanism
• Sensor connector disconnected or defec-
tive
• Sensor defective
531 D
Fusing exit motor error
The PLL lock signal was low for 2 sec-
onds during motor operation.
• Motor lock caused by physical overload
• Motor drive PCB defective
Service Mode
259
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