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TM 11-5820-890-20-2
4-24
4.2.
TROUBLESHOOTING FLOWCHARTS. Continued
NOTES
:
The RCU will read OPEN if the RT
is not set to REM.
If the RCU comsec switch is not
placed in CT for self test, then a
FAIL 9 will be displayed.
Z
Y
d
b
a
S
R
X
W
V
T
U
Q
P
N
M
L
K
J
F
E
D
C
B
A
G
H
VAA J8/J7
CHART 8
RCU DISPLAY DOES NOT LIGHT (VAA OR PSA DS1 LIT).
(Sheet 1 of 1)
1. SET THE RCU AS FOLLOWS:
FCTN: STBY
2. MOVE RCU TO OTHER VAA POSITION.
3. SET THE RCU AS FOLLOWS:
FCTN: TST
NO
YES
RCU
DISPLAY
LIT
?
REPLACE VAA.
NO
YES
AM 7239B
PRESENT
?
REPLACE RCU.
NO
YES
12.5 TO 13.5
V dc
?
REPLACE RCU.
REPLACE AM 7239/A.
1. REMOVE RCU FROM THE VAA.
2. MEASURE VOLTAGE AT VAA J7, PIN F TO PIN
Z (GND).
START
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