TM 11-6625-828-12
Sequence
Item to be
No
inspected
Procedure
References
17
MODULATION switch ------------------
Check MODULATION switch as follows:
a. Set MODULATION switch to OMNI and see
that RF meter needle indicates LEVEL SET
and that % M meter needle is in the broad
green area on the lower meter scale.
b. Set MODULATION switch to three AMP
LOC positions, in turn, and see that RF
meter needle indicates LEVEL SET and that
% M meter needle is in the broad red area of
the lower meter scale.
18
1000~ MOD control ---------------------
Set MODULATION switch to 1000 - and rotate
1000~ MOD control fully clockwise and fully
counterclockwise. See that % M meter indicates
100 to 0.
19
IDENTIFIER switch ---------------------
Set IDENTIFIER switch to ON and observe that
% M meter needle pulses slightly.
4-6. Quarterly Preventive Maintenance Checks and Services Chart
Sequence
Item to be
No
inspected
Procedure
References
1
Publications -------------------------------
See that all publications are complete, serviceable, and
DA Pam 310~4.
current.
2
Modifications
Check DA Pam 310~7 to determine if new applicable
TM 38-750 and
MWO's have been published. All URGENT MWO's
DA Pam
must be applied immediately. All NORMAL MWO's
310-7
must be scheduled.
3
Spare parts --------------------------------
Check all spare parts (operator and organizational) for
general condition and method of storage. No overstock
should be evident and all shortages must be on valid
requisitions.
4-A
Lubrication --------------------------------
Lubricate the equipment
Para 4-9 and
5
Pluckout items ----------------------------
Inspect seating of pluckout items. M ake sure that tube
clamps grip tube bases tightly.
6
Switches -----------------------------------
Inspect MODULATION and OMNI TRACK switches for
dirt, corrosion, and burned contacts.
7
MIC jack------------------------------------
Inspect MIC jack for snug fit and good contact.
8
Transformer terminals ------------------
Inspect terminals on power transformers. All nuts must be
tight. No dirt or corrosion should be evident.
9
Tone generator motor ------------------
Inspect tone generator for security of mounting and condi-
tion of vibration mounts.
10
Cables --------------------------------------
Inspect CG-409E/U and CX-337/U cables, cords, and wires
for chafed, cracked, or frayed insulation.
11
Handles ------------------------------------
Inspect handles on front panel of SG-66B/ARM-5 for
looseness. Replace or tighten as necessary.
12
Metal surfaces ----------------------------
Inspect exposed metal surfaces for rust and corrosion.
Clean and touch up paint as required.
4-7. Cleaning.
WARNING
Inspect the exterior surfaces of the SG-66B/ARM-5. The
The fumes of trichloroethane are
exterior surfaces should be cleaned free of dust, dirt,
toxic. Provide thorough ventilation
grease, and fungus.
as exposure of the fumes to an open
a. Remove dust and loose dirt with a clean, soft cloth.
flame converts the fumes to highly
toxic, dangerous gases.
4-3
