Lexmark X 850 Owners Manual

Diagnostic aids3-13
7500-XXX
Sensor Test (output bin)
This test is used to verify that a specific output bin’s sensors are working correctly. 
To run the Output Bin Sensor Test
1.Touch OUTPUT BIN TESTS from the Diagnostics Menu.
2.Touch Sensor Test.
The panel displays each installed bin, one bin per line. When you select an output bin, the panel displays the 
selected output bin in the header row, and then displays the name of each of the bin’s sensors. You must select 
a specific sensor from this list...

3-14MFP Service Manual 7500-XXX
Hole Punch Test
This test is used to verify that media can be fed to a finisher output bin and then hole punched. No information is 
printed on the feed test pages. 
To run the Hole Punch Test:
1.Touch FINISHER TESTS from the Diagnostics Menu.
2.Touch Hole Punch Test.
Eight sheets of paper are fed, and then the pages are hole-punched with a 2-hole or 3-hole pattern depending 
on the selected punch test. Media is initially requested from the default input source and then...

Diagnostic aids3-15
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Available Bin Level Sensors
Available Media Path 1 Sensors
Available Media Path 2 Sensors
Available Punch and Staple Sensors Sensor Name Description
Fin upper bin full Sensor (upper media bin full)
Stacker bin level1 Sensor (stacker bin level 1)
Stacker bin level2 Sensor (stacker bin level 2)
Stacker bin upper limit Sensor (stacker bin upper limit)
Stacker bin no media Sensor (stacker bin no media)
Stacker bin level encod Sensor (stacker bin level encoder)
 Sensor Name...

3-16MFP Service Manual 7500-XXX
After selecting one of the available sensors, you can manually toggle the sensor between its two values (Open 
or Closed). The LCD displays Open when the sensor is open, and Closed when the sensor is closed.
Press Stop   to exit the test.
BASE SENSOR TEST
This test verifies that the sensors in the base machine are operating properly. 
To run the Base Sensor Test:
Touch BASE SENSOR TEST from the Diagnostics Menu. The panel displays BASE SENSOR TEST in the 
header row and...

Diagnostic aids3-17
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Media Path Sensors
To test any of the displayed sensors, you must manipulate the appropriate area of the printer so the sensor’s 
value will toggle.
If the panel inaccurately displays the sensor’s status, then the sensor must be malfunctioning.
Press Stop   to cancel the test. Base Sensor Test Canceled appears on the LCD.
DEVICE TESTS
Quick Disk Test
This test will perform a non-destructive read/write on one block per track on the disk.
To run the Quick Disk Test:
1.Touch...

3-18MFP Service Manual 7500-XXX
While this test runs, the following graphic appears: 
This test cannot be interrupted once it has begun. After the test finishes, either Disk Test/Clean Test 
Passed or Disk Test/Clean Test Failed appears on the LCD. Press Stop   to clear the final message 
and return to DEVICE TESTS.
Formatting Disk
1/1 0%
DO NOT
POWER OFF 

Diagnostic aids3-19
7500-XXX
PRINTER SETUP
To enter the PRINTER SETUP screen, touch PRINTER SETUP from the Diagnostics Menu. The following 
graphic appears on the LCD:
Defaults
The value of this setting determines whether the printer uses the US or Non-US factory default value for the 
printer settings listed below:
Touch Submit to change the value of this setting, then the LCD returns to the Diagnostics menu. To return to 
the PRINTER SETUP menu without changing the value of this setting, touch Back....

3-20MFP Service Manual 7500-XXX
Printed Page Count
The value of this setting enables you to gauge the amount of usage on a device. 
The Printed Page Count cannot be reset by the servicer.
Permanent Page Count
The value of this setting indicates the total number of pages that have been printed by the printer. 
The Permanent Page Count cannot be reset.
Serial Number
This printer setting records the printer’s serial number that was assigned by the manufacturer. When you select 
this setting, a replica of a...

Diagnostic aids3-21
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The Configuration ID setting allows you to set both Configuration IDs simultaneously. To set one or both 
Configuration IDs:
1.From the PRINTER SETUP menu, touch the icon to the right of the Configuration ID menu item. The 
screen displays the value of both Configuration IDs. By default, the cursor appears on the Configuration 
ID 1 line.
2.To change the value of Configuration ID 1, touch the Backspace key to erase any of the existing 
characters. Then enter the correct ID...

3-22MFP Service Manual 7500-XXX
Parallel Strobe Adjustment (Par S Strobe Adj)
This setting enables you to adjust the amount of time the strobe is sampled in order to determine if valid data is 
available on the parallel port. Each time this value is incremented by 1, the strobe is sampled 50 ns longer. Each 
time this value is decreased by 1, the strobe is sampled 50 ns less. When the value of this setting is 0, the 
factory default value is used to determine the length of time the strobe is sampled.
If...