Xerox Phaser 8400 Service Manual page 210

Electronics Troubleshooting Guide
Attach printer covers
Perform full test of printer
Control Unplug the original Control Panel at
Panel failure connector ('C' / J220) and plug in a known
working Control Panel
Plug in all cables removed during service
Attach printer covers
Perform full test of printer
Printer Computer Verify printer hardware is functional by
Control driver sending a test print via the printer front
Panel is incorrect or panel
functio improperly
nal, but installed If a test print is properly produced,
printer continue to next steps, focusing on
won't problems outside the printer (network,
print Ethernet or computer driver configuration
jobs issues).
sent
from If a test print is not properly produced,
comput focus of problems within the printer
er (internal settings currupted)
Use a known functional computer to test
printer using the printer's parallel port or
USB port. If test computer sucessfully
prints pages, review the version of driver,
the installation and the settings of the
customer's computer.
If test computer is unsucessful, continue
with debug.
General Troubleshooting
This step checks for
a keypad or LCD
failure in the Control
Panel
* Possible solution to
problem *
Trace through all
service steps
performed to
reattach any cables
that were unplugged
during debugging
Using the parallel or
USB port eliminates
any network
complexities
associated with an
Ethernet port.
* Possible solution to
problem *
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