The printhead should first be electrically disconnected from the printer by removing the
printhead interface and printhead power connectors on the left side panel of the mechanism.
Release printhead pressure by rotating the head lift cam shaft to the up position. Remove the
screw in the hole at the front of the printhead swivel block. The entire printhead assembly may
now be slid toward the right and removed from the mechanism.
Installation of the new printhead is accomplished by simply reversing the removal procedure.
NOTE: If the head lift mechanism is not fully lowered during a test, the system will sense that
the printhead is raised and the sheet will feed without the head being energized. This will
result in a blank sheet.
TEST SYSTEM OPERATION
The test system has been configured to be as user friendly and menu driven as possible.
The first message which appears on the CRT gives the system title and asks the user to strike
the Enter key on the keyboard to continue.
At this point the system software attempts to verify the presence of a valid media in the "A:"
drive that will be used as a source and destination for all data files.
Following this initialization process, the main system menu is displayed. All menu selections
may be chosen via the function keys F1 - F10. Available functions at this point may be
summarized as follows:
F1 - EXECUTE TEST - Allows the loading of print parameters as defined by either default
values or a previous test. Any parameter may be altered by the user after choosing this option.
Loaded parameter values are displayed in this menu. Following the test, the operator is
given the opportunity to enter several lines of comments regarding the test just executed and also
densitometer readings.
F2 - SINGLE PATTERN TEST - Allows the loading of print parameters as defined by
either default values or a previous test. Any parameter may be altered by the user after choosing
this option. Loaded parameter values are displayed in this menu. Only a single test pattern
section is printed for a defined test session. No SEQUENCING is allowed with this option.
F3 - TEST FILE EDITOR - Allows for the display of comments associated with any chosen
test with the capability of making any desired changes. Followed by a display of comments
associated with any chosen test with the capability of making any desired changes to
comments or density readings.
F4 - DIRECTORY OF TEST FILES - This selection displays a list of all previously performed
tests.
F5 - VIEW A TEST FILE - Displays a list of all parameters as well as comments and
densitometer readings associated with any operator selected test.
