TM 11-6625-2718-14&P
Section V. TROUBLESHOOTING
4-9. General
4-10. Troubleshooting Chart
This section provides information necessary to
Refer to table 4-3 for the organizational main-
tenance troubleshooting chart. You must report
h e l p organizational maintenance personnel
identify, localize, and repair troubles which are
to higher category maintenance any malfunction
t h a t is beyond the scope of organizational
within their allocated scope.
maintenance personnel. Also refer to table 3-2,
Operator/Crew Troubleshooting.
Table 4-3 Organizational Maintenance Troubleshooting
Corrective action
Probable cause
Malfunction
a. Replace case.
Broken hinge.
a.
1. Case cover fails to latch.
b. Replace case.
Defective latch.
b.
Knob cracked.
a.
2. Knob slips on selector switch
b. Tighten setscrew.
Setscrew loose.
b.
shaft.
c. Replace knob.
Threads in knob stripped.
c.
a. Replace cable.
a.
Defective cable connector.
3. Cable fails to engage test set
b. Clean connectors.
with
Dirt in cable connector or test set
b.
c o n n e c t o r o r engages
connector.
difficulty.
c. Replace test set connectors (para
4-
c. Test set connectors defective.
14).
a. Replace cable or connector (para
4-
a. Faulty cable or connector.
4.
Erratic,
inconsistent
meter
14).
readings.
b. Repair or replace transmitter
or
a. Replace clamping screw (para
4-
a. Clamping screw threads defective.
5. Clamping screw fails to mount test
13).
set.
b. Insert screw from opposite side
of
b. Mounting block threads defective.
block.
Section VI. MAINTENANCE OF TEST SET, RADIO FREQUENCY POWER, AN URM-182
4-11. General
This section describes maintenance procedures
a. Remove the screw (9) to disconnect the chain
t h a t are the responsibility of organizational
(11) from the clamping screw (10). Remove the
maintenance.
screw (14) to disconnect the opposite end of the
chain. Unscrew the clamping screw from the
mounting block of the test set.
a. If the knob is loose on the shaft of the
b. Turn the replacement clamping screw into
selector switch (19), tighten the knob setscrew
the mounting block. Note that it can be inserted
(7).
from either side of the block. Secure the chain to
b. To replace knob (6), loosen the setscrew (7)
the clamping screw and to the mounting block
and pull the knob from the switch shaft. Back off
with screws.
the setscrew in the new knob and slide the knob
onto the shaft. Tighten the setscrew snugly to
secure the knob. After tightening, make sure the
knob aligns with the switch plate indications.
a. Remove the four screws (12) that secure the
Reposition the knob on the shaft if it is
transmitter connector (13) to the top of the test
misaligned.
set case. Pull straight out to remove the con-
nector. Remove the four screws and remove the
c. After tightening or installing the knob,
antenna cable connector from the bottom of the
o p e r a t e the selector switch through its full
case in the same manner.
operating range and recheck that the knob pointer
aligns with the switch plate markings for all
operating positions.
