Kyocera TASKalfa 420i Service Manual page 192

2KR/2KS
Code
C4010 Polygon motor steady-state problem
Stable OFF is detected for 20 s continu-
ously after polygon motor stability.
C4100 BD initialization problem
5 consecutive BD errors were detected
during an 800 ms interval after the poly-
gon motor stabilized.
C6000 Fuser heater break
Fuser thermistor 1 detected less than
70°C/158°F for 10 s during warm-up and
ready in.
During warm-up, the temperature at the
fuser unit thermistor 1 does not rise by
1°C/1.8°F continuously for 5 s.
Fuser thermistor 2 detected less than
40°C/104°F for 10 s during warm-up and
ready in.
During warm-up, the temperature at the
fuser unit thermistor 2 does not rise by
1°C/1.8°F continuously for 5 s.
C6020 Abnormally high fuser thermistor
temperature
Fuser thermistor 1 or 2 is detected
250°C/482°F or more for 40 ms.
C6030 Fuser thermistor break error
The fuser thermistor break signal is
detected continuously for 1 s.
1-4-34
Contents
Causes Check procedures/corrective measures
Poor contact in the Check the connection of connector YC3 on
connector termi- the engine PWB and laser scanner unit, and
nals. the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon Replace the laser scanner unit.
motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Poor contact in the Check the connection of connector YC3 on
connector termi- the engine PWB and laser scanner unit, and
nals. the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon Replace the laser scanner unit.
motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Defective fuser Replace the fuser heater 1 or 2.
heater 1 or 2.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor 1. If any problem is found, repair it.
thermistor 1 or 2.
Defective fuser Replace the fuser thermostat.
thermostat.
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor 1 or 2. If any problem is found, repair
thermistor 1 or 2. it.
Defective fuser Replace the fuser thermistor 1 or 2.
thermistor unit 1 or
2.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor 1 or 2. If any problem is found, repair
thermistor 1 or 2. it.
Defective fuser Replace the fuser thermistor 1 or 2.
thermistor 1 or 2.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Remarks