Kyocera KM-2560 - Page 158

2H0/2HZ-1
1-4-26
C6120 Abnormally high fuser thermistor
edge temperature
Fuser thermistor 1 is detected 230°C/
446°F or more for 40 ms.
Installation defec-
tiveness on fuser
thermistor 1.
Check the mounting state of the fuser ther-
mistor 1. If any problem is found, repair it.
Defective fuser
thermistor 1.
Replace the fuser thermistor 1.
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation.
C6150 Abnormally low fuser thermistor edge
temperature
Fuser thermistor 1 is detected 100°C/
212°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
thermistor 1.
Check the mounting state of the fuser ther-
mistor 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.
C6420 Fuser unit fuse cut problem
The fuse cannot be cut, When replacing
the fuser unit, the fuse cannot be cut in
3 s after the fuse cut signal is turned on.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 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.
C7000 Toner motor problem
A motor over-current signal is detected
continuously for 1 s or longer.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 on
the engine PWB and the connector on the
toner feed motor, and the continuity across
the connector terminals. Repair or replace if
necessary.
Broken the gear. Check visually and replace the gear if nec-
essary.
Defective toner
feed motor.
Run maintenance item U135 and check if
the toner feed motor operates. If not, replace
the toner feed motor.
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation.
C7200 Broken inner thermistor wire
An abnormal value is detected in the
input data to inner thermistor.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC32 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective tempera-
ture sensor.
Replace the temperature sensor.
C7300 Toner hopper problem
Toner emptiness is detected for 300 s,
three times during the toner replenish-
ment.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective toner
sensor.
Replace the developing unit.
Code Contents
Remarks
Causes Check procedures/corrective measures