Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual page 87

4520-xxx
FRU
4 Engine Board
5 Fuser Hot Roll
Fuser Hot Roll Bearings
Fuser Backup Roll
Bearings
Fuser Backup Roll
Fuser Mechanical Parts
Action
Perform the print test with the RIP
controller board removed.
Check the voltage on J16-3 on the
engine board. The voltage should
measure approximately 1.6 V dc as
the thermistor goes from cold to hot.
If incorrect, replace the engine
board. If correct, go to step 5.
Examine the fuser assembly for
signs of overheating or damage.
Check the hot roll and backup roll for
signs of excessive toner, label glue,
labels or other contaminants. If
problems are found with the hot roll
or backup roll, replace the failing roll.
If other problems are found, replace
the fuser assembly.
Diagnostic Information
2-59