2DC
1-5-11
Code
Contents
Remarks
Causes
Check procedures/corrective measures
C6000
C6020
C6050
C6400
Broken fixing heater wire
• In fixing warm-up, the time to reach
50°C/122 °F exceeds 13.5 s, the time
to reach 100°C/212 °F exceeds 10 s,
the time to reach the primary stabili-
zation exceeds 10 s or the time to
reach the secondary stabilization ex-
ceeds 24 s.
Abnormally high fixing unit ther-
mistor temperature
• The fixing temperature exceeds
230°C/446 °F for 40 ms.
Abnormally low fixing unit ther-
mistor temperature
• The fixing temperature remains below
90°C/194°F for 1 s.
Zero-crossing signal problem
• The engine board (KP-5061) does not
detect the zero-crossing signal for the
time specified below.
At power-on: 3 s
Others: 5 s
Poor contact in
the thermistor
connector termi-
nals.
Thermistor in-
stalled incorrectly.
Thermal cutout
triggered.
Heater lamp in-
stalled incorrectly.
Broken heater
lamp wire.
Shorted ther-
mistor.
Broken heater
control circuit on
the power supply
board (KP-5059).
Poor contact in
the thermistor
connector termi-
nals.
Broken thermistor
wire.
Thermistor in-
stalled incorrectly.
Thermal cutout
triggered.
Heater lamp in-
stalled incorrectly.
Broken heater
lamp wire.
Poor contact in
the connector ter-
minals.
Defective power
supply board (KP-
5059).
Defective engine
board (KP-5061).
Check the connection of connector CN4 on
the power supply board (KP-5059) and the
continuity across the connector terminals.
Repair or replace if necessary.
Check and reinstall if necessary.
Check for continuity. If none, replace the
thermal cutout.
Check and reinstall if necessary.
Check for continuity. If none, replace the
heater lamp.
Measure the resistance. If it is 0
Ω
, replace
the thermistor.
Replace the power supply board (KP-5059)
and check for correct operation.
Check the connection of connector CN4 on
the power supply board (KP-5059) and the
continuity across the connector terminals.
Repair or replace if necessary.
Measure the resistance. If it is
∞ Ω
, replace
the thermistor.
Check and reinstall if necessary.
Check for continuity. If none, replace the
thermal cutout.
Check and reinstall if necessary.
Check for continuity. If none, replace the
heater lamp.
Check the connection of connectors YC7
on the engine board (KP-5061) and CN2
on the power supply board (KP-5059), and
the continuity across the connector termi-
nals. Repair or replace if necessary.
Check if the zero-crossing signal is output
from CN2-11 on the power supply board
(KP-5059). If not, replace the power supply
board (KP-5059).
Replace the engine board (KP-5061) if
C6400 is detected while CN2-11 on the
power supply board (KP-5059) outputs the
zero-crossing signal.
