2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-27
4010 Polygon motor synchroni-
zation error
After polygon motor is driven,
the polygon motor speed
won’t stabilize within 10 s.
Polygon motor
(LSU)
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Polygon motor and main/engine PWB
(YC10)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the laser scanner unit (see
page 1-5-27).
Main/Engine PWB 1. Check the main/engine software and
upgrade to the latest, if necessary.
2. Replace the main/engine PWB (see
page 2-2-11).
4200 BD steady-state error
The BD signal is not detected.
APC PWB (LSU) 1. Confirm that the FCC wiring connector is
not distorted and connect the FCC
wiring all the way in.
Laser scanner unit and main/engine
PWB (YC2010)
2. If the FCC wiring is disconnected,
shorted or grounded, replace the FCC
wiring.
3. Replace the laser scanner unit (see
page 1-5-27).
Main/Engine PWB 1. Check the main/engine software and
upgrade to the latest, if necessary.
2. Replace the main/engine PWB (see
page 2-2-11).
Code Contents Related parts
Check procedures/
corrective measures
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