Printronix P5000 Maintenance Manual page 68

Chapter 3
Troubleshooting Display Messages
Message
PAP FIFO OVERFL*
PAP FIFO UNDRFL*
68
Table 2. Message List
Explanation
Paper First In First Out
Overflow. Firmware error on
the controller board.
Paper First In First Out
Underflow.
Solution
1. Cycle power. Run the print job
again. If the message appears,
download the emulation software
again.
2. Power on the printer. Run the
print job again. If the message
appears, replace the controller
board. Record the message and
return it with defective board.
1. Cycle power. Run the print job
again. If the message appears,
download the emulation software
again.
2. Run the print job again. If the
message appears, power off the
printer. Remove the paper path or
pedestal top cover. Make sure
connectors P106 and P107 are
fully seated on the controller
board. Make sure the MPU cable,
the hammer bank logic cable, and
the hammer bank power cable
are undamaged and have good
connections. Replace as
necessary. (Refer to Appendix
A.)
3. Check hammer phasing. Try
using a lower phasing value;
sometimes this message
indicates too high a hammer
phase value.
4. Power on the printer. Run the
print job again. If the message
appears, replace the shuttle
frame assembly.
5. Power on the printer. Run the
print job again. If the message
appears, replace the power
supply board.
6. Power on the printer. Run the
print job again. If the message
appears, replace the controller
board. Record the message and
return it with defective board.