Kyocera KM-3050 - Page 172

2GN/2GP/2GR-3
1-4-32
C6050 Abnormally low fuser unit thermistor
temperature
Fuser unit thermistor 1 is detected 80°C/
176°F less than 1 s continuously during
copying.
Defective fuser
heater M or S.
Replace the fuser heater M or S.
Installation defec-
tiveness on fuser
unit thermistor 1.
Check the mounting state of the fuser unit
thermistor 1. If any problem is found, repair
it.
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
C6400 Zero-cross signal error
While fuser heater ON/OFF control is
performed, the zero-cross signal is not
input within 3 s.
Defective PWB. Replace the engine PWB or power source
PWB and check for correct operation.
C6410 Fuser unit connector insertion prob-
lem
Absence of the fuser unit is detected.
Fuser unit connec-
tor inserted incor-
rectly.
Reinsert the fuser unit connector if neces-
sary.
Defective fuser unit
connector.
Replace the fuser unit.
C6420 Fuser unit fuse cut problem
The fuse cannot be cut, When replacing
the fuser unit, the fuse cannot be cut in
33 s after the fuse cut signal is turned
on.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC10 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Fuser unit connec-
tor inserted incor-
rectly.
Reinsert the fuser unit connector if neces-
sary.
C7300 Toner container problem
Toner level is not detected when toner
empty is detected.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC9 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective toner
container sensor.
Replace the toner container sensor.
C7400 Developing unit connector insertion
problem
Absence of the developing unit is
detected.
Developing unit
connector inserted
incorrectly.
Reinsert the developing unit connector if
necessary.
Defective develop-
ing unit connector.
Replace the developing unit.
C7410 Drum unit connector insertion prob-
lem
Absence of the drum unit is detected.
Drum unit connec-
tor inserted incor-
rectly.
Reinsert the drum unit connector if neces-
sary.
Defective drum unit
connector.
Replace the drum unit.
C7800 Broken external thermistor wire
The thermistor output value is 4.5 V or
more.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC14 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective humidity
sensor.
Replace the humidity sensor.
Code Contents
Remarks
Causes Check procedures/corrective measures