Verifying Print Engine Operation By Printing A Built In Page - Xerox Phaser 8400 Service Manual

Electronics Troubleshooting Guide
The proper error code is displayed,
repeat the following procedures to check
all circuits connected to the Electronics
Module:
- Turn off printer and wait 30 seconds for
power supply capacitors to discharge
- Plug one of the Electronics Module
connectors ('P', 'Q', 'CE', 'AK', 'AI', 'AH')
back in
- Turn on printer and wait for the error
code 34,001.43. Check that the three
voltage indication LEDs INSIDE the
Electronics Module (visible through the
vent holes of the Electronics Module near
the AC power switch) are lit.
- If the proper error code and LEDs
doesn't appear after each I/O connector
is reconnected, repair or replace the
faulty circuit. If the proper code appears,
repeat the procedures until all I/O board
connectors are plugged back in
If repairs are made during this step, plug
in all connectors to printer and retest. If
printer is fixed, reattach covers to printer
and perform a full test. If no defects are
found in this step, replace Electronics
Module, test printer, reattach covers to
printer and perform a full test.
Verifying print engine operation by printing a built in
page.
1.
If not already on, turn on the printer. If the printer does not begin initializing, go
to the topic, "Measuring power supply voltages" on page 4-74.
2.
Once the Power light is on (not blinking) and the front panel displays Ready
to Print it is now possible to print any built-in pages.
3.
If the printer prints the Page, the print engine is working correctly. If the printer
does not print the Page, then a problem exists with the print engine.
General Troubleshooting
If a different error
code is displayed,
see section on Fault
Codes for definition
of the problem and
the procedures
needed to solve
problem
* Possible solution to
problem *
4-73