PS Magazine - TB 43-PS-442
PS, The Preventative Maintenance Monthly
ISSUE 442
SEPTEMBER 1989
SINCGARS .±²
hat do these letters mean?
Hci
hardness critical item.
HcP
=
hardness critical
procedure±
EMP
=
electromagnetic pulse fRom
a nucLear weapon burst±
You'll FInd these letters beside some
oF tHe paragraphs, processes, steps and
repaIr items in your S²NCGA³S TM´
µhe letters ¶C² besIde a repair part
show that the item provides special
pro·ectIon so your equipment is more
resIstant to nucLear hazards±
Never substitute a "pinch-hitter¸ ¹r
an ¶C²º ³eplace ¶C²»s with only the
pa¼s called FOr in your parts TM± ²F
you use a substitute, it will stop your
radio cold under a nuclear attack±
µhe ou·er case oF the S²NCGA³S
radIo Is an ¶C²½ The case pro·ects ·he
3³19³
ma´nTenanµe OF µOmpOnenTs¶ µo·t¸·u¹d
Dº
»¼U½¾¿½g ÀDÁ¾ÃrÄ
ITEM
a.
-
Shoring baR
(Å)Æ
ACTION
±EMA±KS
Loosen scRews i² coveR
ÇÈ
)
.
±emove coveR (2)³
ScR´ws aRe captive to PRevent lossµ Do not
Re¶ove the¶ fRo¶ coveR³
Loosen scRews on teRmina·
b·ock.
±emove scRews¸
±emove shori²G baR
(Å)Æ
¹nsta·· shori²g baR o² teRº
¶i²a· block as shown»
Insta·· scRews ¼n shori²g
baR and tighten³
½nstall coveR (2)¸
46
2
hÉÊ
ËÌÍÎÏ ÐÑ fÑlLÑw ÏÒÌÓÔÍL
ËÍÔÕÐÌÎÍÕÓÌ ÒÖÑÓÌ×ØÖÌÏ
ÙÚÛ 8Ü
adio agaIns· nuclear BLast wave and
±
thermal
radiation
environments
and
seals out EMPº
EMP produces huge transient electri-
cal currents and voLtages that destroy
elec·ronic components± SpeciaL spark
gaps (¶C²'s) are used to protect the
antenna and Field wire inputs to the
receiver¾transmitter (³T) and mount¿
ing adapter FÀom these nuclear proÁ
duced voLtage and current transients±
Âe sure not to by-pass these protecÃ
tive devices± EMP will destroy the cir¿
cuIts In tHe ³T unless they're protected±
When you see the letters ¶CP in the
maIntenance instrUctions, be sure to
¹llow the special maintenance proce¿
dures to tHe Letter± That helps keep the
equipment's nucLear Hardness± ÄtherÅ
wiseÆyour gear won't work when you
need it mos·!
ÙÚÛ 8Ü
47
RÝ-Þß0àá âãä
Connector,
Knob Care
A
loose
aÇteÇÇa coÇnector
oR
control
KnoÈ
wÉll daÊage yoËR
receiverÌtransÊÉtteR
contRols aÇd
cause Íousy coÊmo contactÎ
Ïeep the connector snËg on the
fRont paÇeÍÐ MaKe suRe the spanÇeR
nut is tÉght be¹Re attachiÇg the
åæ
cable coÇnector±
ÑF
the
antennÒ
connector
is
loose, the wIrIng inside will get
twisted or broken±
WÓen the antenna cable is not
in use, keep the cover on the con¿
nector± This»ll keep out dust, dirt
and moisture±
²F a panel control knob is loose,
tighten the knob scRew or the knob
wILl get strIpped± Then, you can»t
set ·he con·rols±
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