Kyocera Copystar CS 3011i Service Manual page 328

Code Contents
6250 Abnormally low fuser edge
thermistor temperature
When the detection tempera-
ture of the fixing thermistor 1
is falling target temperature by
100 °C or more for 1 second
after secondary stable tem-
perature attainment.
Zero-cross signal error
6400
While fuser heater ON/OFF
control is performed, the zero-
cross signal is not input within
3 s.
6910 Engine software ready error
The device won't engage in
ready state in 60 minutes after
warming-up has began.
(A previous timeout process
has not been cancelled.)
Related parts
Fuser unit
Fuser thermostat
Replace the Fuser unit (see page 1-5-25).
Fuser heater
Engine PWB
Replace the engine PWB (see page 1-5-59).
Fuser unit
Engine PWB
1-4-35
Check procedures/
corrective measures
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser thermistor 1 and Engine PWB
(YC9)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. If the I/F connector pins of the fuser unit
and the main unit are deformed owing to
foreign matters, such as paper dusts,
replace the connectors or the units
including the connectors.
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Power source PWB (YC7) and engine
PWB (YC10)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the fuser heater PWB.
1. Turn the main power switch off and after
5 seconds, turn it on.
2. Reinstall the engine software.
3. Replace the engine PWB (see page 1-5-
59).
2RG/2RH