2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-32
7100 Toner sensor error
Sensor output value of 8 or
less.
Toner sensor
1. Check the toner sensor output by U150
(see page 1-3-53).
2. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Toner sensor and main/engine PWB
(YC9)
3. If the wiring is disconnected, shorted or
grounded, replace the wiring.
4. Check that the gears of the Developer
unit are not damaged and the spiral can
rotate.
5. Replace the Developer unit (see page 1-
5-35).
Toner motor
1. Draw out the toner container and
execute U135 to check the toner motor
operation (see page 1-3-50).
2. Check the drive gear can rotate or they
are not unusually loaded and, if
necessary, replace.
3. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Toner motor and main/engine PWB
(YC12)
4. If the wiring is disconnected, shorted or
grounded, replace the wiring.
5. Replace the Toner motor.
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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