Printronix P4280, Maintenance Manual

Page: 46 / 298

3–20 Troubleshooting
Printer Confidence Check
Instruction Indication Yes No
1.
Check that printer is plugged
into correct power source.
(Ref.: User’s Manual)
Power cable installed correctly
to proper source. Step 2. Connect printer to
correct power
source.
2.
Disconnect the interface
(data) cable from the host
computer to isolate the
printer, then run a diagnostic
self–test (page 3–27.)
Printer operates correctly. Fault is not in the
printer. Check
host computer,
applications
software, cabling,
etc. Step 3
3.
Connect the interface (data)
cable to host and printer.
—
Step 4
—
4.
Make a configuration printout.
(Appendix A.)
a) Configuration is correct for
the user’s application.
b) Host computer and printer
use the same protocol
(emulation).
c) Configuration has not been
inadvertently changed by the
user. Step 5 Reconfigure the
printer. (Appendix
A.)
5.
Check alignments and
adjustments. (Chapter 4.)
Assemblies and components
adjusted in accordance with
Chapter 4. Step 6 Adjust all
assemblies that
are out of spec.
6.
Remove paper guide
assembly (page 5–42).
—
Step 7
—
7.
Check all electrical
connectors.
Connections are clean and tight,
wires are not stripped, frayed, or
out of connectors. Step 8. Replace stripped,
frayed, or broken
wires.
8.
Check that PCBAs are
seated correctly in edge
connectors (bottom of card
cage).
PCBAs are firmly seated in
edge connectors. Step 9. Reseat PCBAs.
9.
Inspect for debris that could
cause short circuits (loose
fasteners, foil, etc.).
Metallic debris. Remove debris.
Clean printer
(page 2–4). Step 10.
10.
Install paper guide assembly
(page 5–42).
— Step 11. —
11.
Set power switch to 1 (on).
Printer powers up and display
goes to “Off–line/Emulation” Return printer to
normal operation. Troubleshoot fault
message (page
3–2).