Kyocera TASKalfa 5551ci - Broken Fuser Center Thermistor 1 Wire

2L6/2N6/2N5/2N4
1-4-119
6030 Broken fuser center therm-
istor 1 wire
Input from fuser center therm-
istor 1 is 1010 or more (A/D
value) continuously for 1 s.
Verify if A/D read in the differ-

4 or more when it was turned
on for 10 seconds.
Fuser unit 1. Check that no paper jam is present.
2. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser unit and Engine PWB (YC26)
3. If the wiring is disconnected, shorted or
grounded, replace the wiring.
4. Replace the Fuser unit and execute
U167 counter clear (see page 1-3-112).
(Deteriorated sensitivity due to the toner
adhered to the center thermistor.)
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)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the fuser IH unit (see page 1-5-
70).
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Check procedures/
corrective measures