Lexmark X642e - Page 58

2-20 Service Manual
7002-xxx
920 .51 Hot roll took too long to
heat up after
transitioning to new
enhanced mode. Fuser
page count more than
500,000.
• Bad thermistor, circuit, or
cabling.
• Fuser not receiving AC power.
• Poor supply line voltage.
• Low voltage or incorrect lamp.
• Incorrect hot roll.
Go to “920.xx—Cold fuser service
check” on page 2-132.
920 .52 Hot roll fell too far below
desired temperature
while printing. Fuser
page count more than
500,000.
• Bad thermistor, circuit, or
cabling.
• Noisy thermistor signal.
• Fuser not receiving AC power.
• Poor supply line voltage.
• Low voltage or incorrect lamp.
• Incorrect hot roll.
Go to “920.xx—Cold fuser service
check” on page 2-132.
920 .53 Hot roll too cool while
checking for slope
change. Fuser page
count more than
500,000.
• Bad thermistor, circuit, or
cabling.
• Noisy thermistor signal.
• Fuser not receiving AC power.
• Poor supply line voltage.
• Low voltage or incorrect lamp.
• Incorrect hot roll.
Go to “920.xx—Cold fuser service
check” on page 2-132.
920 .54 Hot roll too cool when
heating to desired
temperature after slope
change. Fuser page
count more than
500,000.
• Bad thermistor, circuit, or
cabling.
• Noisy thermistor signal.
• Fuser not receiving AC power.
• Poor supply line voltage.
• Low voltage or incorrect lamp.
• Incorrect hot roll.
Go to “920.xx—Cold fuser service
check” on page 2-132.
920 .56 Fuser is not increasing
in temperature even
though the lamp has
been on for an extended
time. Fuser count more
than 500,000.
• Fuser is not receiving AC power.
• Poor supply line voltage.
Go to “920.xx—Cold fuser service
check” on page 2-132.
920 .57 Fuser has been below
the desired temperature
for too long while media
is in the nip. Fuser page
count more than
500,000.
• Bad thermistor, circuit, or
cabling.
• Very noisy thermistor signal.
• Fuser not receiving AC power.
• Poor supply line voltage.
• Excessive load on the fuser.
• Low voltage or incorrect lamp.
• Incorrect hot roll.
• Abrupt change in temperatures
that has disrupted control.
Go to “920.xx—Cold fuser service
check” on page 2-132.
Service error codes (9xx.xx) (continued)
Error
code
Sub
codes
Display text Description Action