Kyocera Mita KM-2560 Service Manual page 158

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