TM 11-6625-2632-14-1
Section
II.
TROUBLE
SHOOTING
5-4. General
corresponding procedure in the troubleshooting
procedure. After repair, perform the complete
Troubleshooting at general support maintenance
c a t e g o r y consists of verifying and localizing
checkout procedure to be sure the test set is
functioning properly. After completion of checkout
troubles in defective equipment. It also includes a
procedure, refer to the calibration requirements
checkout of new equipment for proper operation
shown in paragraph 5-13.
before use. Troubleshooting by general support
maintenance personnel is performed using the
operational check specified in table 5-2. Refer to
Troubleshooting procedures are intended to isolate
troubleshooting
procedures
for
the faulty part when a malfunction has been
corrective measures. Replace defective components.
determined to exist through operational checks.
When the operational checks of table 5-2 have
been performed to localize the malfunction to a
Checkout procedures are intended to localize the
specific circuit, perform the appropriate procedure
m a l f u n c t i o n or determine that no malfunction
of the troubleshooting procedure in table 5-3 to
exists. Perform the checkout procedures shown in
determine which part needs replacement.
Replacement procedures are described in paragraph
indications in this procedure, proceed to testing
and calibration (para 5-12 and 5-13). If an ab-
normal indication appears, record the procedure at
which a malfunction occurred and proceed to the
Normal indication
Action
Step
If indication is abnormal
1
Using connector adapters. connect the
test set cables to antenna jacks of
two Radio Sets AN/PRC-90 or
AN/PRC-106 known to be
operating properly (Para 2-8).
2
Set function switch of transmitting
radio to BCN 243.0 and VOL
Switch to minimum
a. Audible beacon tone in speaker of
a. Malfunction is in cables or
3
Set function switch of receiving
radio to VOICE/MCW 243.0 and
receiving radio. Proceed to b below.
receiver antenna coupler circuit.
VOL switch to MAX.
Refer to table 5-3, step 2.
b. Observe test set meter. Needle
b. Malfunction is in detector circuit
should indicate in green area of dial
or meter circuit. Refer to table 5-3,
marking.
step 3.
4
If two Radio Sets AN/PRC-106
are avilable, set function switch of
transmitting radio to BCN 121.5
and VOL switch to minimum.
a. Malfunction is in cables or
a Audible beacon tone in speaker of
5
Set function switch of receiving
receiver antenna coupler circuit.
radio to VOICE/MCW 121.5 and
receiving radio. Proceed to b.
Refer to table 5-3, step 2.
VOL switch to MAX.
below.
b. Malfunction is in detector circuit
b. Observe test set meter. Needle
should indicate in green area of dial
or meter circuit. Refer to table 5-3,
marking.
step 3.
