Lexmark X543 series Service Manual page 211

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8.
Rotate the release lever (C) in a counter clockwise direction with a spring hook to decouple the ITU while
pulling the ITU toward the front.
9.
Hold the release lever while removing the ITU.
Installation note:
•
Write down the 16-digit numeric value of the new FRU before you begin to install it.
•
You may have to rotate the release lever again to install the new ITU.
•
When you have replaced the ITU, be sure to enter the 16-digit numeric value from the barcode on the new
1.
Enter the Diagnostics Menu:
a.
Turn off the printer.
b.
press and hold
c.
Turn on the printer.
d.
Release the buttons when the installed memory and processor speed displays.
2.
Select PRINTER SETUP from Diag Menu, and press Select (
3.
Select ITU Barcode, and press Select (
4.
To enter the 16 digit numeric value:
Use to decrease the leftmost digit value or
next digit. If a digit is already correct, press Select (
last number is entered, press Select (
incorrect, Check Sum Does Not Match displays. Check and re-enter the number.
and .
).
to increase the value. press Select (
), and Submitting changes... should appear. if the entered number is
).
) to accept the number and to continue. When the
Repair information
7525xxx
) to advance to the
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