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TM 11-5820-890-20-2
2-85
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 27
NO RT-A MODULATION FROM COMMANDER'S C 2298.
(Sheet 1 of 14)
NOTE:
Remove each cable one
at a time and check for
sidetone. The sidetone will
return after the short has
been removed.
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
C 2298 J801, J804
1. REMOVE A CX 4723/7060 FROM AM 1780
J505, J506, OR J507.
2. PRESS COMMANDER'S PTT SWITCH AND
COUNT INTO MICROPHONE.
MEASURE VOLTAGE AT COMMANDER'S C 2298
J801/J804, PIN C TO PIN A (GND).
NO
YES
SIDETONE
RETURNS
?
NO
YES
22 TO 32
V dc
?
1
SH 2
2
SH 4
3
SH 5
NO
YES
ALL CONTROL
CABLES
REMOVED
?
START
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