2L6/2N6/2N5/2N4
1-4-121
6050 Abnormally low fuser center
thermistor 1 temperature
Fuser center thermistor 1
detects a temperature lower
warming up, during ready or
during print.
The temperature of thermis-
tor 1 is detected to be less
than one second during low-
power mode.
Power source 1. Check that the operating voltage falls
within +/-10%.
2. Check no voltage drop is caused. The
heater is deactivated at 70V or lower.
3. Relocate the AC outlet that supplies
power.
Fuser unit 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).
Engine PWB 1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
80).
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).
Fuser IH unit 1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser IH unit and Fuser IH PWB (YC9
and 10)
Fuser IH PWB( YC4) and Engine PWB
(YC26)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the fuser IH unit (see page 1-5-
70).
Code Contents Related parts
Check procedures/
corrective measures
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