Fuser Solenoid Service Check - Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual

4520-xxx

Fuser Solenoid Service Check

Service Tip: Try changing the envelope enhance level setting. A
different setting may correct the problem.
Note: Check the fuser envelope conditioner solenoid adjustment as
described in the adjustment section
.
page 4-3
FRU
1 Fuser Envelope Conditioner
Solenoid
2 LVPS
3 DC Fuser to Engine Board
Cable
4 Fuser Control Board
5 Interconnect Board
Engine Board
2-60
Service Manual
"Fuser Solenoid Adjustment" on
Action
The operation of the fuser solenoid
can be observed by removing the
redrive assembly. Check for proper
mechanical operation of the solenoid
and associated hardware, link and so
on. If correct, check the resistance of
the solenoid between J4-1 and J4-2
on the fuser control board. The
resistance measures between 5 ohms
and 10 ohms. If incorrect, replace the
solenoid assembly.
Check the voltage at CN3-18 on the
LVPS. The voltage measures
approximately +42 V dc. If incorrect,
replace the LVPS.
Check the continuity of the DC fuser to
engine board cable. If incorrect,
replace the cable.
Check for continuity between J4-2 and
J1-5 and J4-1 and J1-7 on the fuser
control board. If incorrect, replace the
fuser control board.
If no problems are found with the fuser
solenoid, LVPS, DC cable or fuser
control board, replace the FRUs in the
following order:
1. Engine board
2. Interconnect board