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TM 11-5820-890-20-2
2-33
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 1 of 3)
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
AM 1780 J504, J505, J506, J507
P
N
M
L
B
C
D
E
F
G
H
J
K
A
NO
YES
AM 1780 WILL
NOT KEY FROM
CX 2297
?
2
SH 2
1. FROM CONTROL BOX AM 1780 WILL NOT
KEY, REMOVE CX 4723/7060 FROM AM 1780
J504, J505, J506, OR J507.
2. MEASURE VOLTAGE AT CONNECTOR J504,
J505, J506, OR J507 PIN H TO PIN A (GND).
1
SH 2
NO
YES
22 TO 32 V dc
?
REPLACE AM 1780.
1. CONNECT CX 7060 TO AM 1780.
2. REMOVE CX 7060 FROM HULL BENDIX
CONNECTOR.
3. MEASURE VOLTAGE AT HULL BENDIX
CONNECTOR, PIN M TO PIN N (GND).
START
HULL BENDIX CONNECTOR
NO
YES
22 TO 32 V dc
?
3
SH 3
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