PS Magazine - JANUARY 1979
PS, The Preventative Maintenance Monthly
ISSUE 314
JANUARY 1979
I
J
I
i
I
AN OLD SHARPIE
-The box
lid is sharp enough to do a job on
the handset cord. Ke±p the two
fom co²ing tog±ther by making
sure th± cord i³ saFly inside be´
µre slamming th± door.
Now, let's tak± a look inside.
There are no big secrets here.
Just ¶llow the trouble·shooting
and PM chec¸s in TM 11·5820·
401·10·2
(Dec
77).
O¹gani´
zational·typ±s should scop± out
TM 11·5820·401·12 (Aug 72).
ºs always, tho, th±re ar± som±
things wor» rep±ating.
IT
'
S A BIG TURNO¼¼
½ B±
sure to shut down your co²²o
g±ar b±µ¹e you start your vehicle.
Turn of
beFOre
str±ing
vehicle
A ¾ick o¿ your ºM·1780's main
pow±r sWitch do±s the job.
²
dou´
ble your prot±ction, be sure your
vehicle has a transient suppressor
ÀÁÂ
installed. Save the batteries by
v
running your vehicle whil± the
radio's in use.
14
TIGHT'S RIGHT
-
Make sÃre
all cable connecÄions are ÅÆde
prop±rly. Çyeball the retaining
rings on audio receptacles anÈ ca´
bles ½ É the CX·4 7Ê3. Ë¿ they're
loose, tighten 'em.
Disconnect the cabl± Ìe¿ore
tightening receptacle rings, thÍ. Ë¿
you don't, you risk b±nding pins.
Make sure cable insulation is in
good shape. ºre all cable clamps
attached to the vehicle wall and
usable?
DON'T JUST PLUG A ÎAY
-
Your int±rcom has a lot o¿ CX·
4723 cable ass±mblies. B± sure
they're hook±d up right to the
ºM·1780 audio fÏÐquency am´
pliÑe¹. Òeav± plug J504 ¶r th±
vehicl± command±r. He must be
able to talk to anyone, at anytime.
ºlso watch plug J501. That's Ór
you¹ "ºÔ r±ceiver·transmitt±r
only. Th± plug is built µr the vehi´
cl± battery's 24 volts. The other
plugs aren't. Îrong connections
Õan mean a burned·uÖ ampli×er.
A
MØÙÚÛ ØÙÚÜÇ
Ý
Þe´
ßeßber this one? Keep higà Öres´
sÃre àoses awÆá âoß coãßo
gearä åæ's still good açVce.
USEYOèRéEAD
-êouëì't
¶rgetíhe coßbat vehicîe crew´
men's (CïC) helmet at ðM tiße,
ei»er.
Ha³ch
wIll kIll
¼irst, b± kind
t
that cord. Hook
the cloth±s clip to cloñhes. òis lets
th± cord move wi» you. Onc± out´
side, óatch th± h±lmet. Leaving it
outside makes the cord an ±asy
mark µr a ôlling hatch.
USE YOUR õONNEõTIONS
½
Îatch how you hook up the
helm±t to your control s±t. Th±
y±lloó·mark±d cord go±s on th±
y±llow·mark±d r±c±ptacl±. Not
marked? Should b±. Th± short
cord goes to the r±ceptacle on the
right.
·
±
öh÷n you disconnect, do it at
the cont¹ol box. Keep »e cord as´
s±mblies wi» »e
EVE.
òe neøt
box you hook up to ùght not hav±
the cord you ne±d.
KEÇP ËT õOOL
-
I
you have
r±v±rsed your õïC's conúections,
you'll ±nd up with a ûhot mikeü.
òis means that when you key the
switch on you¹ h±lmet, you're
overriding other commo, even
-´µ
:
Push selec±OR swI³ch
¶·¸¹
FOrward ³O key radiO
that in oth±r t¹acks.
º quick t±st will t±ll you ýust
how hot you are. Move þh± h±l´
met'ÿ s±l±ctor sĀtch µ¹ward. Ë¿it
k±ys th± radio, you'¹± OK. Ë¿ it
doesn't break squ±lch, switch your
conn±ctioās.
;
-±±²³´µ¶
±
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