Fuser error 924.01
Open thermistor check
failure. Fuser page
count between 0 and
• Noisy thermistor signal.
• Intermittent connection.
• Thermistor cable not connected or
thermistor actually open.
Go to “924.xx—Hot fuser
service check” on page 2-91.
Error Code 923.xx, 924.xx, and 925.xx may display for a hot fuser failure.
CAUTION: .The fuser may be hot, use caution before removing or servicing.
CAUTION: There is a danger from hazardous voltage in the area of the printer where you are
working. Unplug the printer before you begin, or use caution if the printer must receive power in
order to perform the task.
Service tip: Set the Fuser Temperature to NORMAL before starting this service check. In Diagnostics mode, In
Diagnostics mode, select EP SETUP, and Fuser Temp.
1 Fuser assembly
Fuser to system board
Check the thermistor cable for correct installation to J5 on the fuser
card. If installed correctly, check for correct installation of J10 on the
system board. If all cables are installed correctly, go to step 2.
2 Fuser top cover assembly
Turn the printer off and disconnect the thermistor cable from J5 on
the fuser board. Measure the resistance between the two pins on the
thermistor cable, if the resistance measures infinity (open circuit),
replace the fuser top cover assembly.
3 Fuser to system board
Reconnect the thermistor cable to J5 on the fuser board. Disconnect
the fuser to system board cable from J10 on the system board and
measure the resistance between J10-3 and J10-4 on the cable. If the
resistance measures infinity (open circuit) check the continuity of
pins 3 and 4 of the cable. If correct, replace the fuser assembly. See
“Fuser assembly removal” on page 4-26. If incorrect, replace the
fuser to system board cable.
Note: If the error code still displays, replace the system board. See
“System board and inner shield removal” on page 4-76.
Most likely just replace the fuser (part of usage kit)
Enter Diagnostic mode:
1. Press and hold (Down Arrow) and (Up Arrow).
2. Turn on the printer.
3. Release the buttons when Performing Self Test displays.
on Apr 05, 2010