Printronix P7000 Series Maintenance Manual page 144

Chapter 3
Troubleshooting Display Messages
Table 5. P7000 H-Series (Spool) Error Messages List
Displayed Message
624:UPPER DRIVER
SHORT*
625:WRONG E-NET
Remove NIC
700:A TO D
OVERUN*
701:ACCESS NULL
POINTER*
144
Explanation
Upper Driver Short. Hammer
driver circuits on the
controller board are shorted
to ground.
The incorrect ethernet NIC
has been installed in this
printer.
Analog to Digital Overrun.
The analog-to-digital
converter overflowed.
Access Null Pointer: The
processor tried to access a
pointer that contains nothing
(null).
Solution
1. Cycle power. If the message
appears, press CLEAR. If the
message does not clear, replace
the hammer bank logic cable and
the hammer bank power cable
assemblies.
2. Power on the printer. If the
message appears, replace the
controller board. Record the
message and return it with the
defective board.
3. Power on the printer. If the
message appears, replace the
shuttle frame assembly.
Remove the installed NIC and
replace it with the correct card for this
printer.
Cycle power. Run the print job again.
If the message appears, replace the
controller board. Record the message
and return it with the defective board.
1. Cycle power. Run the print job
again. If the message appears,
download the emulation software
again (page 247).
2. Cycle power. Run the print job
again. If the message appears,
replace the controller board.
Record the message and return it
with the defective board.