Note: Normally, if the power switch is turned on when the paper is already at the feed
height, the paper height position is detected again. At this time, the paper height sensor
should de-activate within 5 seconds after the paper bottom plate starts to drop. If it does
not deactivate within 5 s after four attempts, the tray lift motor halts. After two attempts to
re-set the paper tray, if this does not solve the problem, then this SC is displayed and tray
control halts.
• Lift motor connector or harness loose, broken, defective.
• Lift motor defective
• Height sensor connector or harness loose, broken, defective
• Height sensor defective
506 B
Paper tray unit motor lock (optional paper
tray)
• Paper tray unit main motor connector
or harness loose, broken, defective
• Motor overload due to an obstruction
• Motor defective
A main motor lock was detected for more
than 50 ms during rotation of the motor in
either the 3rd or 4th tray of the optional
paper feed unit.
507 B
LCT main motor lock
• LCT main motor connector or harness
loose, broken, defective
• Motor overload due to an obstruction
• LCT main motor defective
A main motor lock signal was detected for
more than 50 ms during rotation if the LCT
motor.
510 B
LCT tray malfunction
One of the following has occurred:
1. The LCT lift sensor did not activate within 18 sec. after the LCT lift motor turned on.
2. The LCT lower limit sensor did not activate within 18 sec. after the LCT lift motor
turned on.
3. The LCT lift sensor was already activated when the LCT lift motor turned on.
4. After the paper end sensor was actuated while the tray was being raised, the upper
limit sensor did not actuate within 2.5 sec. In this case, a message is displayed to
remind the user to set the paper and tray control halts. The display is reset by opening
and closing the LCT door.
5. This SC code is issued if problem "4" occurs 3 times.
Service Call Conditions
155
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