3. Diagnostic Aids
This chapter explains the tests and procedures you can run to identify printer failures and verify that repairs have corrected the problem.
Power-On Self Test (Post)
The printer performs 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 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.
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
15.All the LEDs turn off.
