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TM 11-5820-890-20-2
2-34
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 5
AM 1780 RELAYS DO NOT CLICK AND SIDETONE NOT HEARD.
AM 1780 WILL NOT KEY FROM A SPECIFIED CONTROL BOX.
(Sheet 2 of 3)
1
SH 2
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
1. CONNECT CX 7060 TO HULL BENDIX
CONNECTOR.
2. REMOVE CX 7060 FROM C 2297 J904.
3. MEASURE VOLTAGE AT CX 7060, PIN H TO
PIN A (GND).
NO
YES
22 TO 32 V dc
?
REPLACE CX 7060.
REPLACE C 2297.
CX 7060
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
1. CONNECT CX 4723 TO AM 1780.
2. REMOVE CX 4723 FROM C 2298 J801/J804.
3. MEASURE VOLTAGE AT CX 4723, PIN H TO
PIN A (GND).
NO
YES
22 TO 32 V dc
?
REPLACE CX 4723.
REPLACE C 2298.
2
SH 2
CX 4723
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