Lexmark Optra N 4040, Справочное руководство, Страница: 49 / 259

2-6
Laser Printer Reference Handbook
4
027-
04W
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. The status LED comes on solid.
2. The fan turns on for 2 seconds.
3. The engine board checks the top cover interlock switch.
4. The engine board checks the fuser thermistor.
5. The engine board checks the exit sensor.
6. The fuser lamp turns on.
Note: The printer may be idle for up to 60 seconds as the fuser
warms to operating temperature. Printer idle time is shorter if the
fuser is already warm.
7. The fuser lamp turns off.
8. The polygon motor turns on.
9. The main motor turns on.
10. The paper feed gears turn.
11. The print cartridge drive gear engages.
12. The paper feed solenoid picks.
13. The paper feed take-up shaft assembly rotates to home position.
(The paper feed lift assembly is in the down position.)
14. The status LED remains on.
If the printer completes all these steps and no error messages are
displayed, the printer has successfully completed the POST. If your
printer has completed POST, go to the Symptom Table.
If your printer did not complete POST, locate your symptom in the
POST Symptom Table on the following page, and take the appropriate
action.
POST Symptom Table
Symptom Action
POST completes,
but the LED does
not come on Refer to the Operator Panel Service Check in the
Service Manual.
Dead machine Refer to the Low Voltage Power Supply Service
Check in the Service Manual.
Fan not working Refer to the Fan Service Check in the Service
Manual.