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34
8. TROUBLESHOOTING
The scope does not turn on
Check whether the batteries are installed properly. Check
the charge of the batteries. Replace if they are weak. Do
not mix old batteries with new ones.
The target does not appear in focus
Bring the target to the center of the image. By turning the
knob 7 (Fig.1) achieve the clearest target acquisition on
the screen. If NVS-33 is used with daytime scope re-focus
it. Repeat the focusing of NVS-33 and scope if necessary.
If the image still does not seem to be in focus, clean the
lenses. They could be foggy or dusty.
Image has disappeared
If the objective lens of switched on NVS-33 are exposed
to bright light it automatically shuts off to protect the
image intensifier tube from overload. When it happens,
turn the unit off, wait for a few seconds and turn it on
again.
If the image has been lost at the moment of a shot, check
contacts in the battery compartment.