T- 1 2
C0500
Fuser warm up
error
• The voltage of the Thermistor remains low for a prede-
termined period of time when a warm-up cycle is
started.
• The temperature detected by the Thermistor remains
lower than a reference value for a predetermined
period of time for the period of time that begins 5 sec.
after, and ends 9 sec. after, the start of the warm-up
cycle (where the temperature detected by the Ther-
mistor is 80 °C or less).
• The temperature detected by the Thermistor does not
increase for a 3-sec. period or more for the period of
time that begins after the lapse of a predetermined
period of time after the Fusing Roller Heater Lamp has
been turned ON and ends when the lamp is turned
OFF.
• The Fusing Roller Heater Lamp remains ON for a 30-
sec. period or more (except during the period through
which the Main Motor remains energized).
C0510
Fuser temperature
low
• The temperature detected by the Thermistor remains
lower than the set temperature continuously for a pre-
determined period of time while the fusing temperature
control is being provided.
(The set temperatures are as follows: 140 °C during a
print mode at 600 dpi; 70 °C during the standby
mode.)
C0520 Fuser overheat
• The temperature detected by the Thermistor remains
higher than 235 °C for a predetermined period of time
while the fusing temperature control is being provided.
C0650
Scanner home sen-
sor error
• The Scanner Home Position Sensor is not detected
within the predetermined period of time after the Scan-
ner Motor has started turning.
C1200
ASIC memory
abnormal
• An error occurred while writing to or reading the SRAM
on the Control Board (PWB-C).
C1300
Polygon mirror
motor error
• The LOCK signal is not detected within a predeter-
mined period of time that begins 1 sec. after the Poly-
gon Motor has been energized.
• No new LOCK signal is detected for a 1-sec. period
that begins 1.5 sec. after the first LOCK signal was
detected.
• The LOCK signal is not detected for a continuous 0.5-
sec. period in a state in which the Polygon Motor runs
stably.
• The LOCK signal remains ON for a continuous 5-sec.
period or more when the Polygon Motor remains deen-
ergized.
C133B
Communication
with option error
• Communication could not be established with the Con-
troller Control Board within 5 seconds while printing.
Malfunc-
tion
Code
Malfunction Name Description
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