Por (Power-On Reset) Sequence; To Enter The Diagnostic Menu - Lexmark X850e Service Manual

7500-XXX

POR (Power-On Reset) sequence

The following is an example of the events that occur during the POR sequence for the base machine with no
paper handling options installed.
1. Turn the machine on.
2. +5V LED (Power ON) on the system board comes on.
3. Operator Panel LED comes on solid.
4. All diamonds appear on the LCD.
5. While loading code, dots scroll across the LCD.
6. The following is an example of the screen that displays after the code is loaded.
128MB
128MB = Amount of Memory
7. Performing Self Test appears on the LCD.
8. Fuser drive motor turns on.
9. Fuser fan turns on.
10. RIP fan turns on.
11. Heartbeat LED on system boards turns on.
12. Fuser lamps turn on.
13. Vacuum transport belt fan turns on.
14. ITU Missing appears on the LCD, if the ITU is missing.
15. Fuser Missing appears on the LCD, if the fuser is missing.
16. Close Door appears on the LCD, if the front cover is open.
17. Busy appears on the LCD.
18. Operator panel LED blinks.
19. Redrive exit roller turns.
20. Any cartridge errors appear on the LCD such as a Defective Cartridge, Return Program
Information, or Missing Cartridge.
21. Any applicable maintenance messages appear on the LCD such as 80 Fuser Maintenance or 83 ITU
Maintenance.
22. One of the toner low messages appears when applicable: 88 Yellow Toner Low, 88 Magenta Toner
Low, 88 Cyan Toner Low, or 88 Black Toner Low.
23. Color calibration may be initiated. This is appears if one of the following occurs:
•
The printer detects at power on, or the front cover is closed, that a new or different toner cartridge has been
installed.
•
The printer detects at power on when the cover is closed that a new or different ITU has been installed.
•
The printer detects at power on that the fuser temperature is below 60° C.
•
When coming out of power saver if power saver has been active for eight hours or longer.
•
If the printer is turned on when a calibration cycle was in progress since the printer was last powered off.
24. Ready appears on the LCD.

To enter the diagnostic menu:

1. Turn off the printer.
2. Press and hold the 3 and 6 buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 seconds.
2-2
MFP Finisher Service Manual
600Mhz
600Mhz = Processor Speed