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TM 11-5820-890-20-2
2-27
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 3
AM 1780 POWER LAMP DS501 DOES NOT LIGHT.
(Sheet 1 of 5)
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
CX 13300
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
AM 1780 J505, J506, J507
1
SH 2
1. CONNECT CX 4723/7060 BACK TO AM 1780.
2. REMOVE CX 13300 FROM J501.
3. MEASURE VOLTAGE AT CX 13300, PIN B TO
PIN A (GND).
1. REMOVE A CX 4723/7060 FROM THE AM 1780
J505, J506, OR J507.
2. MEASURE VOLTAGE AT AM 1780,
PIN C TO PIN A (GND).
NO
YES
22 TO 32 V dc
?
NO
YES
22 TO 32 V dc
?
REPLACE AM 1780.
REPLACE AM 1780 POWER
LAMP DS501.
START
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