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TM 11-5820-890-20-2
5-45
5.3.
TROUBLESHOOTING FLOWCHARTS. Continued
CHART 11
NO SIDETONE HEARD AT THE LS 671.
(Sheet 2 of 3)
2
SH 3
1
SH 2
1. SET LS 671 CB1 TO OFF.
2. REMOVE PSA FROM MB.
3. IF LS 671 IS CONNECTED TO MB J3, THEN
CHECK CONTINUITY AT PSA J2, PIN E TO
P1, PIN M.
4. IF LS 671 IS CONNECTED TO MB J4, THEN
CHECK CONTINUITY AT PSA J2, PIN E TO
P1, PIN U.
NO
YES
OPEN
?
REPLACE PSA.
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
PSA J2
A
D
B
C
E
F
K
S
U
T
L
H
M
V
R
P
PSA P1
N
J
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