Monthly Preventive Maintenance Checks and Services Chart

TM 11-6625-1635-12

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

paragraph 2-4.

Para 3-12.

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