Organizational maintenance of the tube tester is limited to
preventive maintenance (par. 42) and to the replacement of the
test adapters (fig. 10), electrical plug connector, electrical clip,
insulator clip, knobs (04 through 031, fig. 1), indicator light lens,
and electron tube retainer and shield. The operating instructions
for the tube tester are contained in paragraphs 13 through 31.
4 1 . Tools
and Materials Required
The tools and materials required for organizational maintenance
are as follows:
a. Tools. The only tools required are those tools normally avail-
able to the repairman-user because of his assigned mission.
4 2 . Preventive
a. DA Form 11266.
DA Form 11-266
is a preventive
maintenance checklist to be used by the second echelon. Items not
applicable to the equipment are lined out in the figure. References
to the ITEM block in the figure are to paragraphs that contain
additional maintenance information pertinent to the particular
item. Instructions for the use of the form appear on the form.
b. Items. The information shown in this subparagraph is sup-
plementary to DA Form 11-266. The item numbers correspond
to the ITEM numbers on the form.
Warning: Disconnect all power before performing the follow-
ing operations. After power is disconnected, some capacitors still
may retain dangerous voltages. Before touching exposed electri-
cal parts, short-circuit the parts to ground. When maintenance
is completed, replace the equipment in its case, reconnect the
power, and check for satisfactory operation.