Printronix P5000 Maintenance Manual page 83

Message
STACKER FAULT
Table 2. Message List
Explanation
Two situations can trigger
this message:
1. The stacker elevator is
obstructed while attempting
to move up or down. The
message will always occur if
the user presses the
ELEVATOR UP key on the
stacker control panel to
move the elevator and the
elevator is blocked so that it
cannot move to the top of its
travel.
2. Controller hardware tells
firmware that an over-
current condition exists. This
will only occur if the
controller board or the
stacker motors are bad.
List Of Messages
Solution
1. Open the cabinet rear door and
check for obstructions preventing
elevator movement. Remove any
obstructions.
2. Power on the printer. Operate the
power stacker and check that:
a) all motors are operating,
b) the paddles are rotating,
c) the elevator moves smoothly
and without obstruction,
d) the timing belts are
undamaged and the belt pulleys
are not slipping,
e) the extension springs are
attached and undamaged (not
bent or stretched),
f) the drive rollers are not
damaged,
g) the constant force springs are
tightly mounted and undamaged.
Tighten pulley setscrews and/or
replace damaged components as
necessary.
3. Adjust the stacker rails if they are
not vertical and parallel.
4. Check the stacker limit switches.
(See page 99.) If the limit
switches are OK, go to the next
step.
5. Disable the power stacker unit
under the Printer Control menu.
(Refer to the User's Guide.) If the
message occurs, replace the
controller board and download
new function code.
6. Power off the printer. Remove the
paper path. Disconnect stacker
cables from the controller board,
stacker assembly, and the
stacker control panel (see Figure
72, page 347). Check cables for
cuts, breaks, or damaged pins.
Check continuity of cables. (See
Appendix A.) Replace any cable
that is damaged or fails continuity
test. If the cables are okay,
replace the stacker motors.
83