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TM 11-5820-890-20-2
2-80
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 25
NO RT-A MONITORING AT COMMANDER'S C 2298.
MONITOR SWITCH AT ALL POSITION.
(Sheet 6 of 7)
NO
YES
RT-A AUDIO
HEARD AT
COMMANDER'S
C 2298
?
1. REMOVE CX 13300 FROM CX 13417.
2. CONNECT CX 13300 CONNECTOR (FROM
STEP 1) TO MB J3.
3. CONNECT CX 4723 TO AM 1780 J504.
4. INSTALL VAA.
5. INSTALL RT's.
6. SET VAA CB1 TO ON.
7. SET RT-A FCTN SWITCH TO SQ OFF AND
VOLUME FULL CW.
8. LISTEN FOR RT-A AUDIO AT
COMMANDER'S C 2298.
REPLACE CX 13300.
NO
YES
GREATER
THAN
1 OHM
?
MEASURE RESISTANCE AT VAA
P1, PIN H TO J8, PIN D.
REPLACE VAA.
MEASURE RESISTANCE AT VAA
P1, PIN H TO PIN V (GND).
NO
YES
GREATER
THAN
100 KOHM
?
REPLACE VAA.
REPLACE CX 13417.
7
SH 6
A
D
B
C
E
F
K
S
U
T
L
H
M
V
R
P
VAA P1
N
J
Z
Y
d
b
a
S
R
X
W
V
T
U
Q
P
N
M
L
K
J
F
E
D
C
B
A
G
H
VAA J8
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