PS Magazine - TB 43-PS-666
PS, The Preventative Maintenance Monthly
ISSUE 666
MAY 2008
20
PS 666
MAY 08
21
PS 666
MAY 08
Cleaning and Reseating
The cleaner you keep the AN/MPQ-
53, the fewer problems you’ll have. Dirt
blocks fresh air that keeps electronics
cool and also can cause electrical faults.
Keep the radar’s door shut as much as
possible and vacuum inside the radar
before operating. Any dirt on the floor
will be sucked into the air system. Use
low-pressure air to blow dirt out of the
cabinets with circuit cards and wipe off
the cabinets.
If you get system faults after moving
the radar to a new site, reseat all the circuit
cards in the rack the fault is showing up
in. A loose card will cause faults and cost
you troubleshooting time.
Y
ou don’t have to be a math genius to realize it makes good money sense to use the
adapters for the MLRS W19 and W20 cables.
With the adapters screwed on the W19 and W20, the cable pins can’t be broken when
the cables are hooked up. That means expensive cables won’t have to be replaced.
What’s that mean in real money? The W19 costs more than $700–its adapter, NSN 5935-
01-155-9847, costs $140. The W20 costs more than $900–its adapter, NSN 5935-01-238-5896,
costs $127.
So never leave the motorpool
without
the
adapters
installed.
And make sure the adapters are
still on when you come back from
the Feld. It’s a good idea to keep
extra adapters on hand because the
adapters will eventually disappear or
be damaged.
Because
the
W19
and
W20
often have to be connected and
disconnected
in
the
Feld,
the
adapters clog up with dirt. This leads
to faults like UMBILICAL CONNECTOR
NOT CONNECTED or SNVT (short/no-
voltage test).
If you get faults or an adapter
doesn’t want to seat, take the adapter
off and clean it. Twist its outer ring
and tap it gently to get the dirt out.
Spray electrical contact cleaner, NSN
6850-01-371-8048, into the adapter
to really clean it out. Circuit board
contact cleaner works, too.
When you install an adapter, make
sure the keyways line up. If the adapter won’t go on easily, something is wrong. Don’t force
it. The pins may be bent. You can often straighten bent pins with needle-nose pliers.
Never use the W19 and W20 without their adapters except in battleFeld emergencies.
GPS
When
you
remove
the
GPS, remember to turn off
the GPS circuit breaker. If
you forget, the RGN10 cir-
cuit card may be fried when
you power up. Without the
circuit card, you’ll have trou-
ble auto-emplacing the radar.
See your AMCOM logistics
assistance representative for
more details.
Using cable grips
will help support the
cables’
weight
and
prevent wiring from
being jerked loose.
Order grips with NSN
These grips will work
with all the Patriot’s
large cables.
MLRS…
Don’t
Leave
Home
Without
Them
c’mon
, we’ve
got a mission
to perform.
sorry!
I never
leave home without
my w19 and w20
cable adapters.
Keep
adapters
installed
on W19
and W20
cables
Twist outer ring…
…and gently tap adapter
to clean
out dirt
Spray
with
contact
cleaner
all right,
you’ve got
me moved.
now
reseat
my circuit
cards.
that’s why
I’m having
faults!
Turn off GPS
circuit breaker
when you
remove GPS
Cable grips
take strain
off cables
666.20-21.indd
1-2
4/1/08
6:31:45 PM
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