Lexmark E120 - Cold Fuser Service Check; Hot Fuser Service Check

2-28 Service Manual
4506-1xx
Cold fuser service check
Make sure the correct voltage lamp is installed. The voltage rating is stamped on one of the lamp contacts.
Hot fuser service check
Note: Ensure the correct lamp is installed.
FRU Action
LVPS/HVPS
Fuser
If the fuser lamp comes on and a fuser failure light error code displays, be sure
the thermistor is contacting the hot roll, and the thermistor cable is firmly seated
in connector J2 on the controller card.
Check for excessive toner buildup on the surface of the thermistor. Clean as
necessary.
With the printer unplugged, disconnect the thermistor cable from J2 on the
controller card.
Measure the resistance of the thermistor. The resistance measures from
approximately 7K ohms immediately after printing or POR to approximately 450K
ohms when the thermistor reaches room temperature. (It may take 30 minutes to
cool.)
Replace the fuser assembly as necessary.
FRU Action
LVPS/HVPS
Fuser
Measure the resistance of the thermistor. The resistance measures from
approximately 7K ohms immediately after printing or POR to approximately
450K ohms when the thermistor reaches room temperature. (It may take 30
minutes to cool.)
Replace the fuser assembly as necessary.