TM 11-6625-828-12
4-5. Daily Preventive Maintenance Checks and Services Chart
Sequence
Item to be
No
inspected
Procedure
References
1
Completeness .................................
See that the equipment is complete ..............................
2
Connectors ......................................
Check tightness of all connectors.
3
Meter glasses and indicator lens .....
Check both meter glasses and indicator lens for cracks.
4
Fuses ..............................................
Check both operating and spare fuses for proper rating
and good condition.
5
Crystals ...........................................
See that crystals are of desired frequency and that fre-
quency tabs on front panel agree with crystals.
6
Controls and indicators ...................
While making the operating checks (items 7 through 19),
see that the mechanical action of each knob, dial, and
switch is smooth and free of external or internal bind-
ing and no excessive looseness is apparent. Also, check
both meters for sticking or bent pointers.
7
Preliminary ......................................
Set the controls as follows:
a. POWER-STAND BY switch to STAND BY.
b. 30 - MOD control full ccw.
c. 90 - MOD control fully ccw.
d. 9960 - MOD control fully ccw.
e. 150 -MOD control fully ccw.
f. RF LEVEL SET control fully ccw.
g. 1000~ MOD control fully ccw.
h. MODULATION control to 9960~.
i. IDENTIFIER switch to OFF.
j. MC switch to A.
k. ATTENUATOR uv control to midscale.
8
POWER-STAND BY switch .............
Set to POWER and note that red indicator lamp lights
and that the tone generator starts.
9
% M meter .......................................
Calibrate % M meter by pressing in the ZERO SET knob
and rotating left or right as required.
10
RF meter .........................................
Calibrate RF meter by pressing in the ZERO SET knob
and rotating left or right to align the needle with the
ZERO SET line on the meter scale.
11
Crystal trimmers ..............................
Adjust crystal trimmers for maximum indication on RF
meter.
12
RF LEVEL SET control....................
Adjust RF LEVEL SET control until RF meter needle is
aligned with the red LEVEL SET line on the meter scale.
13
9960~ MOD control .........................
Adjust 9960 - MOD control until % M meter needle is
aligned with the green line at the high end c' the meter
scale.
14
30~ MOD control .............................
Set MODULATION switch to 30~ and adjust 30~ MOD
control until % M meter needle is aligned with the
green line at the high end of the meter scale.
15
90~ MOD control .............................
Set MODULATION switch to 90~ and adjust the 90~
MOD control until the % M meter needle is aligned
with the red line on the upper meter scale.
16
150~ MOD control ...........................
Set MODULATION switch to 150~ and adjust the 150~
MOD control until the % M meter needle is aligned
with the red line on the upper meter scale.
Change 1 4-2
