TM 11-6625-1702-12
g i v e n in the troubleshooting chart (para 4-
15).
a. W h e n t h e e q u i p m e n t f a i l s t o p e r f o r m
4-9. Quarterly Preventive Maintenance
properly,. turn off the power and check all the
C h e c k s and Services
items listed below. Do not check any item with
power on.
Perform the maintenance functions indicated
in the quarterly preventive maintenance
( 1 ) See that the switches have been set
p r o p e r l y as specified in the operating proce-
e a c h quarterly interval in addition to those
dures.
given in the daily and monthly preventive
( 2 ) See that the external test equipment
m a i n t e n a n c e checks and services chart (paras
(if specified ) is connected and adjusted prop-
4 - 5 and 4-7), A quarterly interval is defined
er] y.
as approximately 90 calendar days of 8-hour-
( 3 ) See that the unit under test and all
p e r - d a y operation. A l l deficiencies or short-
cables are plugged securely into their respec-
c o m i n g s will be recorded, and those not cor-
tive connectors.
r e c t e d during the maintenance service and
i n s p e c t i o n will be immediately r e p o r t e d to
(4) Check for burned-out indicator lamps
h i g h e r category maintenance by the use of
and fuses. Replace burned-out indicator lamps
forms and procedures specified in TM38-750.
E q u i p m e n t with a deficiency that cannot be
b. If the procedures in a above do not locate
corrected at the organizational category should
the trouble, perform the applicable procedures
be deadlined in accordance with TM38-750.
4-10. Quarterly Preventive Maintenance Checks and Services Chart
Seqence
No.
Item to he inspected
Procedure
Refer.ncm
---------
Metal
surfaces
1
Check
all
exposed
metal
surfaces
for
rust
and
corrosion.
Remove
rust
and
corrosion
and
re-
paint
bare
spots.
Fuses
and
lamps
---
-
-
-
-
-
-
-
2
None.
Inspect
seating
of
fuses
and
lamps.
Do
not
re-
move,
rock,
or
twist
these
items
to
inspect
them.
Use
only
direct
pressure
to
insure
that
the
item
is
fully
seated.
Publications
_..
_
.-
-.
--
._
DA
Pam
310-4.
3
See
that
all
publications
pertinent
to
this
equip-
ment
are
on
hand,
complete,
usable,
and
cur-
rent.
See
that
all
applicable
changes
are
on
hand.
DA
Pam
310-7
Modification
work
orders
_
4
See
that
all
URGENT
MWO's
have
been
ap-
and
TM
38-
plied
and
that
all
NORMAL
MWO's
have
750.
been
scheduled.
Appx
8
and
5
See
that
the
equipment
is
complete
b. Remove grease, fungus, and ground-in
d i r t from the carrying case; use a soft cloth
Inspect the exterior of the equipment. The ex-
d a m p e n e d (not wet) with cleaning compound.
terior surfaces should be free of dirt, grease,
and fungus.
c. Remove dust or dirt from plugs and con-
n e c t o r s with a brush.
a. Remove dust and loose dirt with a clean,
Caution: Do not press on the meter face
soft cloth.
(glass) when cleaning; the meter may become
Warning: Cleaning compound is flammable
damaged.
a n d its fumes are toxic. Provide adequate
d. Clean the control panel meter and control
ventilation and do not use near flame.