Kyocera ECOSYS P2235dw Service Manual page 295

Step Check description
4 Replacing the main/engine
PWB
C7220: Broken in-machine thermistor
The in-machine thermistor input sampling value exceeds the reference value.
Step Check description
1 Checking the connection
2 Replacing thein-machine
temperature sensor
3 Replacing the main/engine
PWB
C7800: Outer thermistor broken
The temperature/humidity sensor (external thermistor) input sampling value exceeds the reference value.
Step Check description
1 Checking the connection
2 Replacing the tempera-
ture/humidity sensor
3 Replacing the main/engine
PWB
C7990: Waste toner full
The waste toner sensor detected the waste toner box in the drum unit full.
Step Check description
1 Replacing the drum unit
Assumed cause
The main/engine PWB is
faulty.
Assumed cause
The connector is not prop-
erly connected or the wire
is faulty.
The in-machine tempera-
ture sensor is faulty.
The main/engine PWB is
faulty.
Assumed cause
The connector is not prop-
erly connected or the wire
is faulty.
Temperature/humidity sen-
sor is faulty.
The main/engine PWB is
faulty.
Assumed cause
The waste toner reservoir
in the drum unit is full.
7-88
2RV/2RW/2RX/2RY/3RA-3
Measures
Replace the main/engine
PWB.
Measures
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• In-machine temperature
sensor - Main/engine PWB
(YC1)
Replace the in-machine tem-
perature sensor.
Replace the main/engine
PWB.
Measures
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• Temperature/humidity sen-
sor - Main/engine PWB (YC2)
Replace the temperature/
humidity sensor.
Replace the main/engine
PWB.
Measures
Replace the drum unit if not
recovered after turning the
power off and on.
Reference
Reference
Reference
Reference