Control-panel message Status alert Description Recommended action
50.4 Fuser Error
Turn off then on
Fuser drive circuit is defective. 1. Check the power source at
the product location.
NOTE: If the product does
not meet the power
requirement of 43 to 57Hz
frequency, the fuser
temperature control does
not work correctly and this
causes malfunction.
2. Reconnect the connector
(J21) on the DC controller
PCA.
3. Replace the low-voltage
power supply unit.
50.7 Fuser Error
Turn off then on
The fuser is defective (pressure
release mechanism
abnormality).
1. Reconnect the connector
(J181) on the DC controller
PCA.
2. Run the sensor test in the
sensor monitor mode to
verify that the fuser
pressure release sensor is
functioning correctly. If it is
not, replace the fuser
pressure release sensor
unit.
3. Check the fuser pressure
release sensor flag. If it is
damaged, replace the fuser.
4. Run the fuser pressure
release drive test in the
actuator drive mode to verify
that the fuser motor is
functioning correctly. If it is
not, replace the fuser motor.
5. Replace the fuser.
50.8 Fuser Error
Turn off then on
Abnormally low subthermistor
fuser temperature error.
1. Remove the fuser and
remove any residual media
in the fuser.
2. Reinstall the fuser. Check
the connector (J704)
between the fuser and the
product. If it is damaged,
replace the fuser drive unit
or fuser.
3. Reconnect the connector
(J131A) on the DC
controller PCA and the
connectors (J109, J110) on
the power line between the
low-voltage power supply
unit and fuser.
4. Replace the fuser.
220 Chapter 3 Solve problems ENWW
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