ACT DTNVS - Page 35

ACTinBlack Europe S.à r.l. Rev 1.0, May 2020 27
IR source
In a dark location
If IR source still fails to
fails to
with system turned
activate, refer to higher
activate.
on, activate IR source.
level of maintenance.
Visually check IR
source operation; scene
should brighten.
IR source
Visual.
Refer to higher level of
indicator
maintenance.
fails to
activate.
Poor image
Check objective lens
Refocus.
quality.
or eyepiece.
Check for fogging or
Clean lens surface per
dirt on objective lens
paragraph 4.5.
or eyepiece lens.
Check eye relief
Readjust for proper eye
distance.
relief distance.
Light visible
around
eyecup.
Check eyecup for
resiliency.
If eyecup is defective,
refer to higher level of
maintenance.
Dioptre
Check to see if the
If damaged, refer to higher
adjustment
dioptre adjustment is
level of maintenance.
cannot be
bent or broken.
made.
Table 5-1 Troubleshooting, (cont.)