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TM 11-5820-890-20-2
2-37
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 6
AM 1780 RELAYS DO NOT CLICK AND SIDETONE IS HEARD.
INTERCOM CONTINUOUSLY KEYED WHILE CHECKING A C 2298 OR C 2297.
(Sheet 2 of 2)
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
C 2297 J904
NO
YES
SHORT TO
GROUND
?
REPLACE C 2297.
NO
YES
INTERCOM
STILL KEYED
?
1. CONNECT CX 7060 TO TURRET BENDIX
CONNECTOR.
2. REMOVE CX 7060 FROM C 2297 J904.
3. CHECK CONTINUITY AT J904,
PIN H TO PIN A (GND).
REPLACE CX 7060.
1. CONNECT CX 7060 TO AM 1780.
2. REMOVE CX 7060 FROM TURRET BENDIX
CONNECTOR.
1
SH 2
D
E
F
G
P
N
M
L
B
C
H
J
K
A
NO
YES
SHORT TO
GROUND
?
REPLACE CX 7060.
1. CONNECT CX 7060 TO C 2297 J904.
2. REMOVE CX 7060 FROM HULL BENDIX
CONNECTOR.
3. CHECK CONTINUITY AT CX 7060, PIN M TO
PIN N (GND).
VEHICULAR WIRING IS
BAD.
CX 7060
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