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TM 11-6625-1635-12
C1
3 - 6 . Monthly Preventive Maintenance Checks and Services Chart
Procedure
References
Check a11 inculcators for proper operation and
indication.
Inspect cords, cables, and wires for chafed,
c r a c k e d , o r  f r a y e d  insulation.  Replace
connectors that are broken, stripped, worn
excessively, or show evidence of arcing.
Inspect  h a n d l e s , l a t c h e s , a n d h i n g e s f o r
looseness. Replace or tighten as necessary.
Para, 3-8 and 3-9.
Inspect exposed metal surfaces for rust and
corrosion.  C l e a n a n d t o u c h u p p a i n t a s
required.
Inspect jacks for snug fit and good contact,
Inspect terminal blocks for loose connections
and cracked or broken insulation.
Set all switches and controls as indicated in
Perform procedure given in paragraph 2-5.
Note the following:
a. The  AN/ARC-134  meter  reads  27.5  volts
d c (--20 +10% ).
b. The POWER indicator lamps light.
c. The indicator lamp behind VHF COMM
frequency counter dials light.
d. On the maintenance kit modified, the panel
lamps on the intercom control light.
Perform the procedure given in paragraph 2-
6a (1), (2), and (3). An output indication
should be obtained on the TS-352B/U.
Perform the procedure given in paragraph 2-
6a (4). An output indication considerably
lower than that obtained in sequence No. 9
should be obtained on the TS-352B/U.
Perform the procedure given in paragraph 2-
6 b (1), (2), and (3). A signal should be
heard in the headset.
Perform the procedure given in paragraph 2-
6 b (4). The signal heard in the headset
should increase in volume when switch is in
the up position.
Perform the procedure given in paragraph 2-
6b (5). A signal should be heard in the
headset only when RECEIVERS switch 3 is
in the ON position.
Perform the procedure -given in paragraph 2-
6b (6) and (7). The signal should again be
heard in the headset.
Perform the procedure given in paragraph 2-
6c (1) through (5). Squelch threshold should
be 1 microvolt or less.
Perform the procedure given in paragraph 2-
6c (6). Squelch threshold s h o u l d be 100
microvolts or less.
Perform the procedure given in paragraph 2-
6d (1) through (4). Tone should be heard in
the headset on each channel checked.
3-2

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