Kyocera TASKalfa 7002i Service Manual page 1273

C6250: Fuser edge thermistor low temperature error
The fuser edge thermistor detects less than 100°C / 212°F for 1s during print or standby.
Step Check description
1 Removing foreign material
2 Reinstalling the fuser unit
3 Firmware upgrade
4 Checking the connection
5 Replacing the fuser unit
6 Replacing the engine PWB The engine PWB is faulty.
7 Replacing the feed PWB
8 Checking the IH core
motor
9 Checking the connection
Assumed cause
There is foreign material
between the fuser unit and
the IH unit. Or, foreign
material adheres on the
heat roller.
The connector of the fuser
unit is not properly con-
nected.
The firmware is not the lat-
est version.
The connector is not prop-
erly connected. Or, the
wire is faulty.
The temperature cannot
be detected properly due
to the heater broken or the
thermistor error.
The feed PWB is faulty.
The small size shield plate
of the IH core motor does
not shift to the proper posi-
tion.
The connector is not prop-
erly connected. Or, the
wire is faulty.
7-413
Measures
Remove foreign objects if
they are in between the fuser
unit and the IH unit or on the
heat roller. After that, rein-
stall the fuser unit.
Check if the pins of the con-
nector of the fuser unit are
not bent, and correct the pins
if bent. If there is no problem
at the pins, reinstall the fuser
unit so that the connector is
firmly connected.
Upgrade the engine firmware
to the latest version
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire. • Connector of the
fuser unit - Engine PWB •
Connector of the fuser unit -
IH PWB • IH PWB - Engine
PWB • IH PWB - Feed PWB
Replace the fuser unit.
Replace the engine PWB.
Replace the feed PWB.
Execute U030 [IH Core] and
check the IH core motor rota-
tion. If the motor does not
properly operate, repair it.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire. • IH unit - IH PWB
2WA/2NJ/2RK
Reference
Detaching
and reat-
taching the
fuser unit
Detaching
and reat-
taching the
fuser unit
Firmware
Update
Wiring dia-
gram
Detaching
and reat-
taching the
fuser unit
Detaching
and reat-
taching the
engine
PWB
Detaching
and reat-
taching the
fuser IH
PWB
Wiring dia-
gram