Lexmark X 850 Owners Manual

Diagnostic information2-3
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Control panel
Callout Control panel item Function
1LCD  A liquid crystal display (LCD) which shows home screen 
buttons, menus, menu items, and values. Allows for 
making selections within Copy, Fax, and so on.
2Indicator lightGives information about the status of the MFP using the 
colors red and green.
30—9
Note: Referred to as the numeric 
keypad.Press these buttons to enter numbers when the LCD 
screen has a field that accepts the entry of numbers. 
Also, use these...

2-4MFP Service Manual 7500-XXX
5Dial Pause Press to cause a two- or three-second dial pause in a fax 
number. The button only functions within the Fax menu or 
with fax functions.
Press from the home screen to redial a fax number.
When outside of the Fax menu, fax function, or home 
screen, pressing Dial Pause causes an error beep.
When sending a fax, in the Fax To: field, a Dial Pause 
press is represented by a comma (,).
6Clear All Press to restore all default settings to a screen and return 
the MFP...

Diagnostic information2-5
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Home screen and Home screen buttons
After the MFP is turned on and a short warm-up period occurs, the LCD shows the following basic screen which is referred 
to as the Home screen. Use the Home screen buttons to initiate an action such as copy, fax, or scan, to open the menu 
screen, or to respond to messages.
Callout number Button Function
1 Copy Touch to access the Copy menus.
If the home screen is shown, press a number to access 
the Copy menus, too.
2 E-mail Touch...

2-6MFP Service Manual 7500-XXX
Other buttons may appear on the Home screen. They are:7 FTP Touch to access the File Transfer Protocol (FTP) menus. 
A document can be scanned directly to an FTP site.
8 Fax Touch to access the Fax menus.
Button Button name Function
Release Held Faxes 
(or Held Faxes if in 
Manual Mode)There are held faxes with a scheduled hold time previously set. To 
access the list of held faxes, touch this button.
Search Held Jobs To search on any of the following items and return any...

Diagnostic information2-7
7500-XXX
Unlock Device This button appears on the screen when the MFP is locked. The 
control panel buttons and shortcuts cannot be used while it appears 
and no default copy starts may occur.
To unlock the MFP:
1Touch Unlock Device to open a PIN entry screen.
2Enter the correct PIN to unlock the numeric keypad (0—9) and the 
Backspace button on the control panel.
Note:If an invalid PIN is entered, Invalid PIN. appears. A pop-up 
screen appears with the Continue button. Touch...

2-8MFP Service Manual 7500-XXX
Using the LCD touch-screen buttons
The following section provides information on navigating through several screens. Only a few are chosen to demonstrate 
the use of the buttons.
Sample screen one
Information on touch-screen buttons
Button Button name Function or description
Touch button Touch the select button to have another screen appear with 
additional items. On the first screen, the user default setting is 
shown. Once the select button is touched, and the next screen...

Diagnostic information2-9
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Left arrow button Touch the left arrow button to scroll left to:
• Reach a decreased value shown by an illustration.
• See a full text field on the left.
Right arrow button Touch the right arrow button to scroll right to:
• Reach an increased value shown by an illustration.
• See a full text field on the right.
Scan the ADF
Scan the flatbedOn the gray navigation bar, these two choices indicate that two types 
of scanning are possible. One may choose to scan from the ADF...

2-10MFP Service Manual 7500-XXX
Sample screen two
Information on touch-screen buttons
Button Button name Function or description
Down arrow  Touch the down arrow to move down to the next item in a 
list, such as a list of menu items or values. The down arrow 
does not appear on a screen with a short listing. It only 
appears if the entire listing cannot be seen on one screen. 
On the last screen of the listing, the down arrow is gray to 
indicate that it is not active since the end of the list appears...

Diagnostic information2-11
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Other touch-screen buttons
Cancel Job See “Cancel Jobs” on page 2-7.
Continue Touch Continue after a menu item or value on a screen is 
selected and more changes need to be made for a job from 
the original screen. Once Continue is touched, the original 
screen appears.
For example, if one touched Copy on the home screen, the 
Copy screen appears like “Sample screen one” on 
page 2-8. The following example shows how the Continue 
button reacts.
1Touch the select button...

2-12MFP Service Manual 7500-XXX
Features
Done Allows specifying that a job is finished. For example, 
when scanning an original document, one could 
indicate that the last page is scanned, and then 
printing the job would begin.
Back Touch the Back button to return to the previous 
screen, and no settings are saved on the screen 
where it was touched. The Back button appears on 
each menu screen except for the home screen.
Home Touch the Home button to return to the home screen. 
The Home button appears...