Kyocera KM-3050 Service Manual page 144

2GN/2GP/2GR
Code
C6050 Abnormally low fuser thermistor 3
temperature
Fuser thermistor 1 is detected 100°C/
212°F less than 1 s continuously during
copying.
C6400 Zero-cross signal error
While fuser heater ON/OFF control is
performed, the zero-cross signal is not
input within 3 s.
C6410 Fuser unit connector insertion prob-
lem
Absence of the fuser unit is detected.
C6420 Fuser unit fuse cut problem
The fuse in the fuser unit did not blow
within three seconds.
C7300 Toner container problem
Toner level is not detected when toner
empty is detected.
C7400 Developing unit connector insertion
problem
Absence of the developing unit is
detected.
C7410 Drum unit connector insertion prob-
lem
Absence of the drum unit is detected.
C7800 Broken external thermistor wire
The thermistor output value is 4.5 V or
more.
1-4-32
Contents
Causes Check procedures/corrective measures
Defective fuser Replace the fuser heater M or S.
heater M or S.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor 1. If any problem is found, repair it.
thermistor 1.
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
Defective PWB. Replace the engine PWB or power source
PWB and check for correct operation.
Fuser unit connec- Reinsert the fuser unit connector if neces-
tor inserted incor- sary.
rectly.
Defective fuser unit Replace the fuser unit.
connector.
Poor contact in the Check the connection of connector YC10 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Fuser unit connec- Reinsert the fuser unit connector if neces-
tor inserted incor- sary.
rectly.
Poor contact in the Check the connection of connector YC9 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective toner Replace the toner container sensor.
container sensor.
Developing unit Reinsert the developing unit connector if
connector inserted necessary.
incorrectly.
Defective develop- Replace the developing unit.
ing unit connector.
Drum unit connec- Reinsert the drum unit connector if neces-
tor inserted incor- sary.
rectly.
Defective drum unit Replace the drum unit.
connector.
Poor contact in the Check the connection of connector YC14 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective humidity Replace the humidity sensor.
sensor.
Remarks