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TM 11-5820-890-20-2
2-78
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
Chart 25
NO RT-A MONITORING AT COMMANDER'S C 2298.
MONITOR SWITCH AT ALL POSITION.
(Sheet 4 of 7)
V
U
T
S
R
P
N
M
L
K
J
H
F
E
D
C
B
A
MB J3,
AM 1780 J501, J511
J
H
P
K
S
R
N
M
L
F
E
D
B
A
C
V
U
T
MB J5
NO
YES
SHORT
TO
GROUND
?
1. SET RTs TO STBY.
2. SET THE VAA CB1 TO OFF.
3. REMOVE CX 13300 FROM AM 1780 J501.
4. CHECK CONTINUITY AT AM 1780 J501,
PIN K, TO PIN A (GND).
REPLACE AM 1780.
NO
YES
OPEN
?
1. RECONNECT CX 13300 TO J501.
2. REMOVE RTs FROM VAA.
3. REMOVE VAA FROM MB.
4. REMOVE CX 13313 FROM MB J3.
5. CHECK CONTINUITY AT MB
J3, PIN K TO J5, PIN H.
REPLACE MB.
NO
YES
85 TO 196 mV ac
?
MEASURE AC VOLTAGE AT AM 1780 J511,
PIN K TO PIN A (GND).
REPLACE AM 1780.
5
SH 5
2
SH 4
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