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TM 11-5820-890-20-2
2-113
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 32
NO RT-B MODULATION AT COMMANDER'S C 2298.
MONITOR SWITCH AT C.
(Sheet 1 of 5)
NOTE:
Remove each cable one at a time
and check for rushing noise. The
rushing noise will return once the
short has been removed.
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
AM 1780 J503, J504
1. REMOVE CX 13300 AT AM 1780 J503.
2. REMOVE COMMANDER'S CX 4723 FROM
AM 1780 J504.
3. CHECK CONTINUITY AT AM 1780 J504, PIN V
TO J503, PIN U.
NO
YES
SIDETONE
RETURNS
?
1. REMOVE A CX 4723/7060 FROM THE AM 1780
J505, J506, OR J507.
2. PRESS COMMANDER'S PTT AND COUNT
INTO HS.
1
SH 2
2
SH 3
NO
YES
ALL
CX 4723/7060
REMOVED
?
NOTE:
The driver's C 2297 is unable
to monitor or key RT-B in the
C position. The slip ring
assembly does not have the
proper connections.
NO
YES
OPEN
?
REPLACE AM 1780.
START
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