4-6. TEST DESCRIPTION. (CONT)
Paragraphs a through d below explain test options 1 through 4.
a. RUN HARNESS TEST. This test performs continuity checks of wiring harnesses J1 in the day sensor
b. RUN ELECTRICAL TEST. This test momentarily applies electrically operated item mounted on the
day sensor subassembly to determine if it is operational.
c. RUN OPTICAL TEST. This is an operator assisted test. The program switches the day sensor
subassembly into each field of view (FOV). A message prompt on the VDT asks you to confirm the lens
configuration and to check for dirty, scratched, or contaminated optics. The program will pass or fail the
day sensor subassembly depending upon your input.
d. RUN ALL TESTS. You should normally select this option to begin testing a day sensor subassembly
UUT. When this option is selected, the test program will sequence through the harness test, the electrical
test, and the optical test.
4-7. PRETESTING DATA.
Awareness of the following information will help you to successfully test the day sensor subassembly,
and may prevent unnecessary termination of the test.
a. Mirror Movement. During testing of the FOV assemblies, the mirror rotation is very quick and slams
into the stop positions. This is normal operation and the program should not be terminated.
b. Gear Rotation. During testing of the FOV assemblies, gears rotate and make considerable noise.
This is normal operation and the program should not be terminated.
c. Hanging Cables. Ensure that any hanging cables do not get tangled in the optics assemblies and
gears. Damage to the equipment could result if they do.
4-8. FINAL ACCEPTANCE.
When the day sensor subassembly has been repaired, repeat the UUT test. If an ALL TESTS GO
prompt is received at the end of the test, the day sensor subassembly is considered to be fully