PS Magazine - TB 43-PS-588
PS, The Preventative Maintenance Monthly
ISSUE 588
NOVEMBER 2001
PS 588
NOV 01
51
So here’s the rule: When the ring
stops turning, stop turning it!
Make sure you’re not taking bad
rings to the field. Before you head
out, do Item 4 in Table 2-2 of the
Before/After PMCS in TM 11-
5855-262-10-2.
But be careful!
In
some cases, pins are being broken
during the checks!
Unit repairmen,
if you find
diopter rings with broken pins,
check the warranty expiration date
on the warranty label on the front of
the goggles. If your NVG is still
under warranty, you’re covered. If
your NVG is out of warranty, you
may be in luck. Certain older NVGs
are covered under an extended war-
ranty–good until the end of
December. For more details on the
extended warranty contact Lance
Fujita at: DSN 654-1610 or (703)
704-1610; or e-mail him at:
lance.fujita@nvl.army.mil
.
OK, let’s focus on the problem with
AN/PVS-7B and AN/PVS-7D night vision
goggles. The problem at hand
is
focus! Or,
rather, a lack of focus due to busted diopter
adjustment ring pins.
If you break a diopter ring pin, your night
vision goggles are kaput until you get the
ring fixed. And a lot of pins are being bro-
ken by heavy-handed adjustments.
The ring adjusts for the sharpest image
possible in a range of +2 to -6 diopters. This
represents about half a turn of the ring.
Don’t turn
diopter rings
too far
sarge, I have
the enemy
in
sight
.
They seem
to be up to
something.
what
warranty?
Can you
see me
now?!
Don’t try to piece together compo-
nents of different rear cover assemblies
to make one good assembly. There are
several types of rear covers and they are
not compatible with each other. You’ll
just create more problems. Wait until
your new rear cover assembly arrives to
use the NVG.
AN/PVS-7B, AN/PVS-7D…
If your NVGs and rear cover assem-
blies are still under warranty, or if they
are covered under the extended warran-
ty, follow the warranty return instruc-
tions in Section 1-7 of TM 11-5855-
262-23&P-2.
To get a replacement rear cover
assembly when the broken NVG is out
of warranty,
order a replacement
through your normal supply channels.
But some of you want more. You keep
adjusting when there is no place to adjust to!
It’s not long until the pins in the ring that
define the stopping points are busted. Then
it’s impossible to hold focus.
588. 50-51 (C)
10/2/01
4:02 PM
Page 1
Back to TopBack to Top
