2L6/2N6/2N5/2N4
1-4-131
6720 Fuser IH belt rotation error
While driving, the pulse count
is less than 3 for 2 seconds
during the input to the rotation
pulse signal is 200 msec.
Fuser motor
1. To check the motor operation, execute
U030 Fuser (see page 1-3-34).
2. Check that the drive gear can rotate and
not heavily loaded and, if necessary,
apply grease to the axle holder and
gears.
3. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser motor and Feed PWB (YC18)
and Engine PWB (YC6)
4. If the wiring is disconnected, shorted or
grounded, replace the wiring.
5. Replace the fuser motor (see page 1-5-
107).
Fuser belt sensor
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser unit and Engine PWB (YC26)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the fuser unit and execute
U167 counter clear (see page 1-3-112).
Fuser IH PWB
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser IH PWB(YC4) and Engine PWB
(YC26)
2. Replace the fuser IH PWB (see page 1-
5-96).
Engine PWB 1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
80).
Code Contents Related parts
Check procedures/
corrective measures
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