IBM 6400 Maintenance Information Manual page 374

Appendix J
Stacker Operation
Stacker Troubleshooting
The power stacker augments the paper feed system of the printer. The most
frequently occurring problems in the paper feed system are paper jams.
Because of the electromechanical nature of the system, other problems that
can occur are worn or poor electrical connections and cabling, worn or
defective feed motors, worn or damaged mechanical components, or
incorrect installation of the stacker assembly. Table 10 shows some of the
problems that may occur with the power stacker and the page where you can
find the troubleshooting procedure.
Symptom
Printer does not detect
presence of power
stacker
017 STACKER JAM
CHECK STACKER
018 STACKER FULL
CHECK STACKER
019 STACKER FAULT
CHECK STACKER
Stacker "chatters" at
upper or lower limit
Stacker does not stack
properly
Stacker elevator does
not move
Stacker elevator moves
by itself
Stacker not operating
374
Table 10. Power Stacker Troubleshooting
Origin of Symptom
Reported by customer.
Message on control
panel LCD.
Message on control
panel LCD.
Message on control
panel LCD.
Reported by customer.
Reported by customer.
Reported by customer.
Reported by customer.
Reported by customer.
Explanation
Various causes possible.
Paper is bunching above the
elevator or the paper motion
detector is not working
properly.
Status message: the power
paper stacker is full.
This message is triggered
when the elevator cannot
reach the top or bottom limit
switch before timing out.
Various causes possible.
Various causes possible.
Various causes possible.
Various causes possible.
Same symptom as "Printer
does not detect presence of
power stacker"
Solution
page 116
page 68
page 69
page 70
page 117
page 118
page 118
page 118
page 116