B140 SERIES AND G126 SERVICE MODE
SM 4-47 B064 Series/B140 Series/G126
Trouble-
shooting
SC500: Feed, Transport, Duplexing, and Fusing Systems
NOTE: For G126 Fusing System-related SC Codes, it may be necessary to reference the B064
Series SC500 codes section in this manual.
SC No. Symptom Possible Cause
Tray 1 lift malfunction 501 B
• The lift sensor is not activated
within 10 seconds after the tray
lift motor starts lifting the bottom
plate.
• When the tray lowers, the tray lift
sensor does not go off within 1.5
sec.
• Tray overload detected when the
tray is set.
• The lower limit sensor of the LCT
does not detect the lower limit
within 10 sec.
• Tray lift motor defective, disconnected
• Paper or other obstacle trapped between
tray and motor
• Pick-up solenoid disconnected, blocked
by an obstacle
• Too much paper loaded in tray
Tray 2 lift malfunction 502 B
• The lift sensor is not activated
within 10 seconds after the tray
lift motor starts lifting the bottom
plate.
• When the tray lowers, the tray lift
sensor does not go off within 1.5
sec.
• Tray overload detected when the
tray is set.
• Tray lift motor defective or disconnected
• Paper or other obstacle trapped between
tray and motor
• Pick-up solenoid disconnected or
blocked by an obstacle
• Too much paper loaded in tray
Tray 3 lift malfunction 503 B
• The lift sensor is not activated
within 10 seconds after the tray
lift motor starts lifting the bottom
plate.
• When the tray lowers, the tray lift
sensor does not go off within 1.5
sec.
• Tray overload detected when the
tray is set.
• Tray lift motor defective or disconnected
• Paper or other obstacle trapped between
tray and motor
• Pick-up solenoid disconnected or
blocked by an obstacle
• Too much paper loaded in tray
Tray 4 lift malfunction 504 B
• The lift sensor is not activated
within 10 seconds after the tray
lift motor starts lifting the bottom
plate.
• When the tray lowers, the tray lift
sensor does not go off within 1.5
sec.
• Tray overload detected when the
tray is set.
• Tray lift motor defective or disconnected
• Paper or other obstacle trapped between
tray and motor
• Pick-up solenoid disconnected or
blocked by an obstacle
• Too much paper loaded in tray
LCT feed motor malfunction 507 B
One of the following conditions is
detected:
• The LD signal from the feed
motor is detected abnormal for
50 ms after the motor switches
on.
• At power on, the motor is
detected loose or disconnected.
• Feed motor defective
• Feed motor connector disconnected
• Obstacle interfering with mechanical
movement of motor.
Rev. 05/2005
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