TM 1-6625-476-30
5-3
5-5. TEST CONCEPT. (CONT)
b. Illustrations. Section IV contains illustrations that supplement the UUT test procedures on the VDT.
The procedures cannot be successfully accomplished unless you refer to the appropriate illustrations
when directed by message prompts. In addition to showing you how to make an adjustment or locate a
component, many of the illustrations contain explanatory data, cautions relating to equipment damage,
and warnings relating to shock hazards. At the appropriate time during the UUT test, a message prompt
will refer to an illustration in section IV. Turn to the referenced illustration for assistance while performing
the following instructions on the VDT.
5-6. TEST DESCRIPTION.
Three kinds of tests are performed by the UUT test program. These tests are described in the following
paragraphs.
a. Control Panel Test. The test program measures resistance and continuity of all potentiometers an
switches.
b. Prealinement. The test program measures the size, centering, focus, and rotation of the heads-out
display video at the 875 and 525 line rates. You are instructed to adjust any parameter that is out of
tolerance.
c. E/O Algorithms. This is a depot measurement. The test program compares the values obtained in the
prealinement tests with fixed values. CRT brightness is measured.
5-7. PRETESTING DATA.
At times, the UUT test program will appear to have stopped for up to 1 hour. This is because some
portions of the program require this amount of time to execute. During these times, a prompt will appear
on the VDT explaining that a program delay is in progress.
5-8. FINAL ACCEPTANCE.
When the control panel assembly has been repaired, repeat the UUT test. If an ALL TESTS GO prompt
is received at the end of the test, the control panel assembly is considered to be fully operational.
