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1-4
Laser Printer Reference Handbook
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If the printer completes all these steps and no error indications are
displayed, the printer has successfully completed the POST. If the
printer has completed POST without an error and a symptom exists, go
to the “Symptom Table” on page 1-12.
Power-On Self Test (Post)
The printer performs the following Power-On Self Test when powered
on:
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 continuously.
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.
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.
Model 4026-06A, 06D - The Ready LED turns on solid and the
Data LED blinks. Go to Step 17.
Model 4026-06B, 06E - 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.
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