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TM 11-5820-890-20-2
2-28
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 3
AM 1780 POWER LAMP DS501 DOES NOT LIGHT.
(Sheet 2 of 5)
NOTE:
The normal installation connects the
CX 13313 and CX 13300 from MB J3 to
the AM 1780 connector J501. Connector
J501 provides the dc power to the rest of
the VIC system. MB J4 could be a
possible connection for some systems.
J
H
P
K
S
R
N
M
L
F
E
D
B
A
C
V
U
T
MB J5
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
MB J3
2
SH 3
1. CONNECT CX 13300 TO AM 1780 J501.
2. REMOVE VAA OR PSA FROM MB.
3. MEASURE VOLTAGE AT MB J5,
PIN B TO PIN A (GND).
NO
YES
22 TO 32 V dc
?
1. REMOVE CX 13313 FROM MB J3.
2. MEASURE VOLTAGE AT MB J3,
PIN B TO J5, PIN A (GND).
NO
YES
22 TO 32 V dc
?
REPLACE MB.
3
SH 5
NO
YES
CX 13417
PRESENT
?
4
SH 4
1
SH 2
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