Misc Tests; Toggle Itu; Belt Tracking (Itu 4Th Point Adjustment) - Lexmark C78x Service Manual

MISC TESTS

Toggle ITU

The test is used to verify that ITU belt retraction, BOR, hardware is functioning properly. Two options are
available: Raise Belt and Lower Belt. If the belt is already in the requested position, no action occurs. Otherwise
the belt will move to the requested position.
1.
Select Toggle ITU from the menu.
2.
Select Raise Belt or Lower Belt from the menu.
The following screens display for the test selected:
Raise ITU
Lower ITU
Raise ITU Testing... or Lower ITU Testing... appears.
The results appear on the display. For example:
Lower ITU
Test Passed
3.
To exit the test, press any button.

Belt Tracking (ITU 4th point adjustment)

This test is used to determine the need for the ITU Shim to correct 4th point alignment following the ITU
replacement. If the belt tracks to one side or the other, a shim may be required to keep it aligned.
Note: Remove all cartridges and close all covers before initiating this test, and note the belt position.
1.
Remove the cartridges from the printer, and close all covers.
2.
Select Belt Tracking from the menu.
The following screen is displayed:
Belt Tracking Testing...
The operation normally takes approximately 15 minutes to complete. It may take less time if the test fails.
Drift Sensors
5061
3-13
Diagnostic aids