given in a through c above to isolate trouble to
55. Visual Inspection
a particular init.
a. Before making operational tests, examine
the equipment for one or more of the following
defects:
Performance Check List
(1) Tubes out of sockets.
a. General. The equipment performance check
(2) Tubes 1oose in sockets.
list (par. 58) will help the operator to determine
(3) Broken exciter lamp.
whether Facsimile Set AN/TXC-1(*) is function-
(4) Damage to lead screw.
ing properly. The check list gives the item to be
(5) Blown rectifier power supply fuse.
checked, the conditions under which the item is
(6) Blown motor fuse.
checked, the normal indications and tolerances
(7) Worn, broken, or disconnected cords or
of correct operation, and the corrective measures
plugs.
the repairman can take. To use this list, follow
(8) Wires broken because of excessive vibra-
the items in numerical sequence.
tion.
b. Action or Condition. For some items, the
b. When failure is encountered and the cause
information given in the action or condition
in not immediately apparent, check as many of
column consists of the settings of various switches
the above items as is practicable before starting
and controls under which the item is to be checked.
a detailed examination of the component parts of
For other items, it represents an action that must
the system. If possible, obtain information from
be taken to check the normal indication given in
the operator of the equipment regarding perform-
the normal indications column.
ance at the time trouble occurred.
c. Normal Indications. The normal indica-
tions listed include the visible and audible signs
that the operator will perceive when the items
are checked. If the indications are not normal,
Sectionalization consists of determining whether
the repairman should apply the recommended
the trouble is in the transceiver or the power
corrective measures.
supply.
d. Correction Measures. The corrective meas-
a. Operate the set and observe its performance.
ures listed are those the operator can make with-
Refer to the equipment performance check list
out turning in the equipment for repairs. Refer-
ence in the table to a paragraph in chapter 6
b. If the entire equipment is dead, the trouble
indicates that the trouble cannot be corrected
is undoubtedly in Rectifier Power Unit PP-86(*)/
during operation and that troubleshooting by
TXC-1. Check the fuse (figs. 158 through 161)
an experienced repairman is required. If the set
and interconnecting cable.
is completely inoperative or if the recommended
c. If a tone is not heard in the motor lamina-
corrective measures do not yield results, trouble-
tions, and the exciter lamp does not light, the
shooting is necessary. If the situation requires
trouble is probably in the fork oscillator unit, or
that communication be maintained, and if the
the trouble may be in the lamp amplifier section
set is not completely inoperative, the operator
of Rectifier Power Unit PP-86(*)/TXG1. Check
must maintain the set in operation as long as it is
tubes V17 through V21 and V23.
possible to do so.
d. Use procedure similar to the simple checks
