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TM 11-6660-204-25
top and bottom (figs. 42 and 4-3) of the chassis
6 4 . Cable Assemblies
(including plugs and jacks).
a. Visually inspect cable assemblies for the fol-
c. Using the tube tester, check all vacuum tubes
lowing:
one at a time, being sure to replace tubes in the
(1) All cable clamps installed and tight (fig.
same socket from which they were removed; re-
6-1).
place any defective tubes with the same type or a
(2) No insulation or sleeves chafed at cable
currently approved substitute.
clamps.
d. Check the mechanical security of all compo-
(3) No insulation or sleeves chafed where
nents; tighten if required.
cables enter plugs.
e. Replace all tube shields.
b. Electrically check continuity of cables using
Multimeter TS-352 and figure FO-7. Check all
connections-
6-7. Fan Panel
(1) J101 and J102.
a. Using a vacuum cleaner and a clean cloth,
(2) J101 and J103.
thoroughly clean the fan panel interior and exte-
(3) J102 and J104.
rior.
(4) J102 and J105.
b. Check the mechanical security of all compo-
(5) J104 and J105.
nents; tighten if required.
6-5. Control Panel
c. Check the routing of the interior cable to in-
sure that it will not contact the moving fan; re-
a. Check mechanical security of all
front panel
route the cable if necessary.
control knobs and tighten if required.
d. Turning the fan by hand, check that the
b. Check controls and circuit breakers for loose
blade is not bent, out of line, or hitting the screen
attachment to the panel and tighten if required.
or brackets.
c. From the inside of the panel, apply a few
e. Check capacitor C1 for any sign of leaking or
drops of light oil to the panel hinge. After allow-
swelling; replace if necessary.
ing 1 minute to soak in, thoroughly wipe dry with
a clean cloth.
f. Check for rust or corrosion. Repaint if re-
quired.
d. From the rear of the panel, check the secu-
rity of the hardware that mounts the meters,
speaker, and plugs to the panel; tighten if re-
6-8. Power Supply
quired.
a. Remove all tube shields.
e. Check for signs of corrosion; repaint if re-
b. Using a vacuum cleaner, thoroughly clean the
quired.
top and bottom (figs. 3-14 and 3-15) of the chas-
sis including plugs and jacks.
f. Check lacing of cables and replace if re-
quired.
c. Using the tube tester, check all vacuum tubes.
Replace defective tubes with the same type or a
g. Check action of switch S202; if the detent
currently approved substitute.
appears worn, tag and unsolder wires, remove and
replace the switch, and resolder the wires.
d. Check the mechanical security of all compo-
nents; tighten if required.
h. Check the mechanical security of the resistor
mounting assembly; tighten if required.
e. Replace all tube shields.
i. Using first a vacuum cleaner, then a lint free
cloth, thoroughly clean the front and rear of the
Recorder
panel.
a. Using a vacuum cleaner and lint free cloth
thoroughly clean the exterior and the interior of
6 6 . Signal Data Converter
the recorder.
a. Remove all tube shields.
b. Check the security of all panel hardware;
b. Using a vacuum cleaner, thoroughly clean the
tighten if necessary.


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