IBM 6400 Maintenance Information Manual page 70

Chapter 5
Troubleshooting Display Messages
Operator Panel
Message
019 STACKER FAULT
CHECK STACKER
70
Table 4. Message List
Explanation
Two situations can 1. Open the cabinet rear door and check for
trigger this message:
1. The stacker
elevator is obstructed
2. Power on the printer. Operate the power
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-
3. Adjust the stacker rails if they are not
current condition
exists. This will only
occur if the controller 4. Check the stacker limit switches. (See
board or the stacker
motors are bad.
5. Disable the power stacker unit under the
6. Power off the printer. Remove the paper
Corrective Action
obstructions preventing elevator
movement. Remove any obstructions.
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.
vertical and parallel.
page 119.) If the limit switches are OK, go
to the next step.
Printer Control menu. (Refer to the User's
Guide.) If the message occurs, replace
the CMX controller board and download
new function code.
path. Disconnect stacker cables from the
CMX controller board, stacker assembly,
and the stacker control panel (see Figure
70, page 348). 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.