Lexmark X 850 Owners Manual

							Diagnostic information2-3
7500-XXX
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 buttons to dial phone numbers for faxes.
Note: If a number is pressed while on the home screen 
without pressing the # button first, the Copy menu opens 
and changes the Copy Quantity.
4# (Pound or number character) Press this button:
• For a shortcut identifier.
• Within phone numbers. For a Fax number with a #, 
enter it twice – ##.
• From the home screen, the Fax Destination List menu 
item, E-mail Destination List menu item, or Profile List 
menu item to access shortcuts.
12
3
4
5
6
7
8
9 10
ABC
DEF
GHI
JKL
MNO
PQRS
TUV
WXYZ
11
Status Indicates
Off MFP power is off.
Blinking green MFP is warming up, processing data, 
or printing a job.
Solid green MFP is on, but idle.
Solid red O
perator intervention is required. 
						

							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 to the home screen.
When in the menus, it cancels all changes that have not 
been submitted and returns the MFP to the home screen.
When in other menus, it returns all settings to their 
default values, and then returns the MFP to the home 
screen.
7Start Press to initiate the current job indicated on the control 
panel.
From the home screen, press it to start a copy job with 
the default settings.
If pressed while a job runs through the scanner, the 
button has no effect.
8Stop Press to cause the printing or scanning to stop.
During a scan job, the scanner finishes scanning the 
current page and then stops, which means paper may 
remain in the automatic document feeder (ADF).
During a print job, the print media path is cleared before 
the printing stops.
Stopping appears on the control panel during this 
process.
9Backspace Within the Copy menu, which is accessed by touching 
the Copy button, press Backspace to delete the right-
most digit of the value in the Copy Count. The default 
value of 1 appears if the entire number is deleted by 
pressing Backspace numerous times.
Within the Fax Destination List, press Backspace to 
delete the right-most digit of a number entered manually. 
It also deletes an entire shortcut entry. Once an entire 
line is deleted, another press of Backspace causes the 
cursor to move up one line.
Within the E-mail Destination List, press Backspace to 
delete the character to the left of the cursor. If the entry is 
in a shortcut, the entire entry is deleted.
10Asterisk (*) * is used as part of a fax number or as an alphanumeric 
character.
11USB Direct interface The host Universal Serial Bus (USB) direct interface on 
the control panel is used to plug in a USB flash memory 
device and print any Portable Document Format (PDF) 
[.pdf file], Joint Photographic Experts Group (JPEG) 
[.jpeg or .jpg file], Tagged Image File Format (TIFF) [.tiff 
or .tif file], Graphics Interchange Format (GIF) [.gif file], 
Basic Multilingual Plane (BMP) [.bmp file], Portable 
Network Graphics (PNG) [.png file], PiCture eXchange 
(PCX) [.pcx file], and PC Paintbrush File Format [.dcx file] 
files.
The USB direct interface can also be used to scan a 
document to a USB flash memory device using the PDF, 
TIFF, or JPEG formats. 
						

							Diagnostic information2-5
7500-XXX
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 to access the E-mail menus. It is possible to scan 
a document directly to an e-mail address.
3 Menus (A key is shown on the button.) Touch to access the menus. These menus are only 
available when the MFP is in the Ready state.
The Menus button is on a gray bar called the navigation 
bar. The bar contains other buttons described as follows.
4 Status message bar Shows the current MFP status such as Ready or Busy.
Shows MFP conditions such as Toner Low.
Shows intervention messages to give instructions on 
what the user should do so the MFP can continue 
processing, such as Close door or insert print 
cartridge.
5 Status/Supplies Appears on the LCD whenever the MFP status includes a 
message requiring intervention. Touch it to access the 
messages screen for more information on the message 
including how to clear it.
6 ? (Tips) All menus have a Tips button. Tips is a context-sensitive 
Help feature within the LCD touch screens.
1
2
3
4 5 67 8Copy
Fax
E-mail
FT P
Status/
SuppliesReady. Toner low.
Touch any button to begin.Menus 
						

							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 matches:
• User names for held or confidential print jobs
• Job names for held jobs, excluding confidential print jobs
• Profile names 
• Bookmark container or job names 
• USB container or job names for supported extensions only
Held Jobs To open a screen containing all the held jobs containers.
Lock Device This button appears on the screen when the MFP is unlocked and 
Device Lockout Personal Identification Number (PIN) is not null or 
empty.
To lock the MFP:
1Touch Lock Device to open a PIN entry screen.
2Enter the correct PIN to lock the control panel which locks both the 
control panel buttons and the touch-screen buttons.
Once the control panel is locked, the PIN entry screen clears, and 
the Lock Device button is replaced with the Unlock Device button.
Note:If an invalid PIN is entered, Invalid PIN. appears. A pop-up 
screen appears with the Continue button. Touch Continue. The home 
screen returns with the Lock Device button. 
						

							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 Continue. The home 
screen returns with the Unlock Device button.
Cancel Jobs To open the Cancel Jobs screen. The Cancel Jobs screen shows any 
of the following items under three headings on the screen which are 
Print, Fax, and Network: 
•print job
• copy job
•fax
• profile
•FTP
• e-mail send
Each heading has its own list of jobs shown in a column under the 
heading. Each column can only show three jobs per screen. The job 
appears as a button. If more than three jobs exist in a column, then the 
down arrow appears at the bottom of the column. Each touch of the 
down arrow accesses one job in the list. When more than three jobs 
exist, once the fourth job in the list is reached, then an up arrow 
appears at the top of the column. For illustrations of the up and down 
arrow buttons, see Information on touch-screen buttons.
Cancel
Jobs 
						

							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 
appears, touching another item shown on the screen changes the 
user default setting.
Left scroll decrease 
buttonTouch the left scroll decrease button to scroll to another value in 
decreasing order.
Right scroll increase 
buttonTouch the right scroll increase button to scroll to another value in 
increasing order.
Copy from
Letter (8.5 x 11 in.)
Copy to
Letter (8.5 x 11 in.)
Plain PaperSides (Duplex)
Portrait
1-sided to 1-sided
Content
Scale
Auto
Darkness
Scan the
ADFScan the
flatbedBack Text Text/Photo
Photograph Printed Image 
						

							Diagnostic information2-9
7500-XXX
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 or 
the flatbed.
Submit A green button indicates a choice. If a different value within a menu 
item is touched, it needs to be saved to become the current user 
default setting. To save the value as the new user default setting, 
touch Submit.
Back When the Back button is shaped like this, no other navigation is 
possible from this screen except to go back. If any other choice is 
made on the navigation bar, the screen closes.
For example, in Sample screen one, all the selections for 
scanning have been made. One of the preceding green buttons 
should be touched. The only other button available is Back. Touch 
Back to return to the previous screen, and all the settings for the 
scan job made on Sample screen one are lost.
Back When the Back button is shaped like this, both forward and 
backward navigation is possible from this screen, so there are other 
options available on the screen besides selecting Back. Button Button name Function or description
Scan the
ADF
Scan the
flatbedSubmit
Back
Back 
						

							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 
on this screen.
Up arrow Touch the up arrow to move up to the next item in a list, 
such as a list of menu items or values. When on the first 
screen presented with a long list, the up arrow is gray to 
indicate that it is not active. On the second screen needed 
to show the rest of the listed item, the up arrow is blue to 
show that it is active.
Unselected radio button This is an unselected radio button.
Touched radio button This is a selected radio button. Touch a radio button to 
select it. The radio button changes color to show it is 
selected. In Sample screen two, the only paper size 
selected is Letter.
Unknown paper size. Copy from:
Letter (8.5 x 11 in.)
Legal (8.5 x 14 in.)
Executive (7.25 x 10.5 in.)
Continue Cancel 
Job A4 (210 x 297 mm) Folio (8. 5 x 13 in.)
Statement (5.5 x 8.5 in.) 
						

							Diagnostic information2-11
7500-XXX
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 by the Copy to box and a new 
screen appears.
2Touch MP Feeder and a new screen appears.
3Touch Legal and a new screen appears.
4Touch Next and a new screen appears.
5Touch Plain Paper for the type of print media needed.
6Touch Continue. The Copy screen returns to allow other 
selections besides Copy to. The other settings on the 
Copy screen available are Duplex, Scale, Darkness, 
Collate, and Copies.
Touch Continue to return to the original screen and 
make other setting changes for a copy job before the 
Copy it button is touched to start the job.
Button Button name Function or description
Custom Allows for creating a custom button based on the 
user’s needs.
Cancel Touch Cancel to cancel an action or a selection.
Touch to cancel out of a screen and return to the 
previous screen.
Touch Touch to select a menu. The next screen appears 
showing menu items.
Touch to select a menu item. The next screen 
appears showing values. Button Button name Function or description
Cancel
Job
Continue
Cancel 
						

							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 on every screen except 
the home screen. See the “Home screen and Home 
screen buttons” on page 2-5.
Grayed out button When this button appears, it looks faded with a faded 
word on it. It means the button is not active or 
unavailable on this screen. It was probably active on 
the previous screen, but the selections made on the 
previous screen caused it to be unavailable on the 
current screen.
Gray button Touch this button to select the action appearing on 
the button.
Feature Feature name Description
Menus
 ‡ 
Settings 
‡ Copy 
Settings 
‡ 
Number of CopiesMenu trail line A line is located at the top of each menu screen. This 
feature acts as a trail. It gives the exact location within 
the menus. Touch any of the underlined words to return 
to that menu or menu item. The Number of Copies is 
not underlined since this is the current screen.
If this feature is used on the Number of Copies screen 
before the Number of Copies is set and saved, then the 
selection is not saved, and it does not become the user 
default setting. 
Attendance message alert If an attendance message occurs which closes a 
function, such as copy or fax, then a blinking red 
exclamation point appears over the function button on 
the home screen. This feature indicates an attendance 
message exists. Button Button name Function or description
Done
Back