Control panel message Status alert Description Recommended action
50.3 Fuser error
Fuser is defective (abnormally
low temperature of the
thermistor)
1. Reconnect the connectors
of the fuser (J802) and DC
controller PCA (J104).
2. Measure the resistance
between the connector
J802-1 and J802-3 on the
fuser. If the resistance is
not within the range from
approximately 220 kΩ to
660 kΩ (at ambient
temperatures), replace the
fuser.
3. Reconnect the connectors
of the fuser power supply
unit (J201, J202, J203).
4. Measure the resistance
between the connector
J801-1 and J801-2 on the
fuser. If the resistance is
not within the range from
approximately 21 Ω to 25 Ω
(at ambient temperatures),
replace the fuser.
5. Replace the fuser.
6. Replace the fuser power
supply unit.
50.6 Fuser error
Fuser is defective (drive circuit
failure)
1. Reconnect the connectors
of the fuser power supply
unit (J201, J202, J203) and
DC controller PCA (J105).
2. Check the power source. If
the power generator is
used, improve the situation.
NOTE: If the product
does not meet the power
requirement of 40 to 70Hz
frequency, the fuser
temperature control does
not work properly and this
causes malfunction.
3. Replace the fuser power
supply unit.
51.XX Error
Turn off then on
Optical unit is defective. Reconnect the connectors of the
laser driver PCA (J501) and the
DC controller PCA (J108, J109).
If the problem is not solved,
replace the product.
86 Chapter 2 Solve problems ENWW
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