Power-On Self Test (Post) - Lexmark T520 Service Manual

Infoprint 1120 and 1125

Power-On Self Test (POST)

When you turn the printer on, it performs a Power-On Self Test.
Check for correct POST functioning of the base printer by observing
the following:
1. The LED comes on.
2. The operator panel displays one and a half row of pels, and
then clears.
3. Diamonds scroll across the display, and then clear.
4. The operator panel displays one and a half row of pels, and
then clears.
5. The top line of the operator panel displays one square block of
pels that turn on one at a time until all sixteen blocks display
and then they all turn off.
6. "Performing Self Test" appears on the display.
– The high capacity option elevator tray moves to the
uppermost position if installed.
– The duplex unit is checked if installed.
7. "Busy" appears on the display.
8. The fuser lamp turns on. The fuser takes longer to warm up
from a cold start than a warm start.
9. The main fan turns on.
10. The main drive motor turns on.
11. The developer drive assembly drives the developer shaft in the
toner cartridge.
12. The exit rollers turn.
13. The operator panel LED starts blinking.
14. "Ready" appears on the display.
Diagnostic Information
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