7800 Broken Temperature Sensor Wire; 7810 Short-Circulated Temperature Sensor Wire; 7900 Drum Eeprom Error - Kyocera TASKalfa 1800 Service Manual

Code Contents
7800 Broken temperature sensor
wire
Input from temperature sensor
is 0.3 V (A/D value) or less
7810 Short-circuited tempera-
ture sensor wire
Input from temperature sensor
is 0.3 V (A/D value) or more
7900 Drum EEPROM error
No response is issued from
the device in reading/writing
for 5 ms or more and this
problem is repeated five times
successively.
Related parts
Outer temperature
sensor
Main/Engine PWB
Outer temperature
sensor
Main/Engine PWB
DR PWB
Main/Engine PWB
1-4-33
2NC/2NF/2NG/2NN/3P7/3P8/3P9
Check procedures/
corrective measures
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Temperature sensor and main/engine
PWB (YC6)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the temperature sensor.
1. Check the main/engine software and
upgrade to the latest, if necessary.
2. Replace the main/engine PWB (see
page 2-2-11).
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Temperature sensor and main/engine
PWB (YC6)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the temperature sensor.
1. Check the main/engine software and
upgrade to the latest, if necessary.
2. Replace the main/engine PWB (see
page 2-2-11).
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
DR PWB and main/engine PWB (YC9)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Drum unit (see page 1-5-
40).
1. Check the main/engine software and
upgrade to the latest, if necessary.
2. Replace the main/engine PWB (see
page 2-2-11).