Lexmark X 850 Owners Manual

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Touch Display Log, and a graphic similar to the following appears on the LCD:
Each logged event is identified by the text that appeared when the event occurred. For instance, if the log 
recorded a 900 Service Error, the Display Log would show 900 Service RIP Software. Log entries appear 
in chronological order.
If additional log entries exist, touch   to view the next log entries. Continue following this procedure until you 
reach the end of the logged entries. To view...

3-24MFP Service Manual 7500-XXX
Print the Event Log
Each page of the printed Event Log report has the title Event Log at the top of each page followed by the model 
name and serial number. The following is a sample of a printed Event Log:
As the Event Log report prints, Printing EVENT LOG appears on the LCD.
Clear the Event Log
To clear the Event Log:
1.Touch Event Log from the Diagnostics Menu.
2.Touch Clear Log.
Ye s and No appears on the menu. If you touch Ye s, Deleting EVENT LOG appears on the LCD...

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SCANNER TESTS
ASIC Test
This operation performs a diagnostic test on the scanner ASIC that cycles through all of the scanner ASICs 
memory. 
To perform the ASIC Test:
1.Touch SCANNER TESTS from the Diagnostics Menu.
2.Touch ASIC Test.
During this test, ASIC Test Running... appears on the LCD. At the completion of this test, ASIC Test 
Passed or ASIC Test Failed appears on the LCD. To clear the message, press Stop .
Feed Test
This test continuously executes flatbed and/or ADF...

3-26MFP Service Manual 7500-XXX
Scanner Manual Registration
Note:  All scanner and ADF manual registration alignment verifications must be done in standard user mode, 
not in configuration or diagnostic mode.
Note:  You should verify the printer registration alignment before conducting the manual scanner registration 
process. For information on the printer registration process, see “REGISTRATION” on page 3-36.
You can adjust the devices scanner and ADF registration through a manual process. Perform this...

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Testing the manual scanner registration
Note:  Machine must be in Standard User Mode.
To properly position the registration test original page on the flatbed scanner and the ADF side 1 and ADF side 2, 
follow the graphic below:
Warning:  Ensure that the registration test original page is properly positioned according to the diagrams or 
registration and margins cannot be properly adjusted.
1.Place the registration test original page on the flatbed scanner according to the...

3-28MFP Service Manual 7500-XXX
Analyzing the manual scanner registration copies
1.To analyze the manual scanner registration of the flatbed, ADF side 1, and ADF side 2, hold the test copy 
according to the diagram below.
2.Compare the three copies to the registration test original page for image placement. Ideally, the image 
should be centered on the page by measuring the paper edge arrows or the black lines with a ruler.
3.If the leading and side margin edges are out of adjustment, then proceed to...

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4.Make required adjustments and touch Submit. 
Note:  All reference to Side Registration in the graphic below, refers to the left side edge.
5.Turn the machine off and then back on in order to make a copy.
6.Using the registration test original page, make a copy using the flatbed scanner and the ADF side 1 and 
ADF side 2 to verify adjustments for accuracy.
7.If further adjustments are required, reenter Diagnostic Menu and repeat items 2 through 6 as needed.
The panel...

3-30MFP Service Manual 7500-XXX
3Decreasing the registration value moves the text toward the lead edge of the page and narrows the lead 
margin; increasing the registration value moves the text away from the lead edge of the page and widens the 
lead margin. The entire image moves up or down on the page; therefore, no compression or expansion of the 
image occurs to preserve the lead margin. 
4Decreasing the registration value moves the text away from the left side edge of the page; increasing the...

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Sensor Test (Scanner Tests) 
To perform the Sensor Test:
1.Touch SCANNER TESTS from the Diagnostics Menu.
2.Touch Sensor Test.
The following example appears on the LCD:
Press Stop   to return to the SCANNER TESTS. Platen length APS 1
Platen length APS 2
ADF left cover interlock
ADF pre registration
ADF registration
Sheet through
ADF inverter
Tray media width 1
Tray media width 2
Tray media width 3
ADF width APS 1
ADF width APS 2
ADF width APS 3
Tray media length 1
Tray media...

3-32MFP Service Manual 7500-XXX
Exiting Diagnostics Menu
From the Diagnostics Menu, touch Back until a graphic appears with Exit Diag Menu in the lower right corner. 
Touch Exit Diag Menu to perform a POR, and the following graphic appears on the LCD:
Copy
E-Mail
Fax
FTP
Menus
Ready. Toner low.
Touch any button to begin. Status/
Supplies