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

4026-0XX

Power-On Self Test (POST)

When you turn the printer on, it performs a Power-On Self Test.
Check for correct POST functioning by observing the following:
1. All LEDs come on solid.
2. The fan turns on for 2 seconds.
3. All the LEDs turn off.
4. The engine board checks the status of the cover interlock
switch.
5. The LEDs begin to turn on then off sequentially.
6. The fan turns off.
7. The engine board checks the status of the paper exit sensor.
8. The engine board checks the status of the thermistor.
9. The fuser lamp turns on.
Note: The printer may be idle for up to 40 seconds as the fuser
warms to operating temperature. Printer idle time is shorter if
the fuser is already warm.
10. The polygon motor (printhead motor) turns on.
11. The main motor turns on.
12. The paper feed gears turn.
13. The print cartridge drive gear engages.
14. The paper feed take-up shaft and D-roll assembly rotates to
home position. (The paper feed lift plate assembly is in the
down position).
15. All the LEDs turn off.
16. Models 4026-06A, 06C, 06D and 06J, 070 and 071 - The Ready
LED turns on solid and the Data LED blinks. Go to Step 17.
Models 4026-06B and 06F - The Ready LED turns on solid and
the Data LED blinks.
•
The controller board checks flash ROM installation.
•
The controller board verifies that flash is formatted.
•
The controller board attempts to format flash if unformatted.
•
The Data LED blinks during format.
•
The printer continues POST after format is complete.
•
If format fails, a "Flash Memory Failure" error displays.
17. The main drive motor turns off.
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