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2-18 Service Manual
4044-XXX
The fuser lamp does light
FRU Action
Model 310
Thermistor
If the fuser lamp comes on and a
fuser failure LED error code displays,
be sure the thermistor is contacting
the hot roll and the thermistor cable
is firmly seated in connector CN1 on
the LVPS board. Check for excessive
toner buildup on the surface of the
thermistor. Clean or replace as
necessary. Turn the printer off and
disconnect the thermistor cable from
CN1 on the LVPS board. Measure
the resistance of the thermistor
between CN1-1 and CN1-2. The
resistance measures approximately
225K ohms when cool. Replace the
thermistor as necessary.
Model 312
Thermistor
If the fuser lamp comes on and a
fuser failure LED error code displays,
be sure the thermistor is contacting
the hot roll and the thermistor cable
is firmly seated in connector CN10
on the engine board. Check for
excessive toner buildup on the
surface of the thermistor. Clean or
replace as necessary. Turn the
printer off and disconnect the
thermistor cable from CN10 on the
engine board. Measure the
resistance of the thermistor between
CN10-1 and CN10-3. The resistance
measures approximately 225K ohms
when cool. Replace the thermistor
as necessary.
Models E310 & E312
Fuser Lamp
Make sure the correct voltage lamp
is installed. The voltage rating is
stamped on one of the lamp
contacts.