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  TM 11-5805-424-15/NAVELEX 0967-220-9010/TO 31W2-2G-41
Item
Trouble symptom
Probable trouble
Checks and corrective measures
No.
d. Check for fsk signal at pin V of as-
sembly AT connector; if not pres-
sent, replace assembly A7.
e. Check for fsk signal at pin S of as-
sembly A6 connector; if not pres-
ent, replace MX-73(*)/G module
f. Check for fsk signal at pin V of as-
sembly A6 connector; if not pres-
ent, replace assembly A6.
g. Check voltage at test jack J2 on as-
sembly A3; if ground, replace as-
sembly A3.
6
LINE MONITOR SEND jack in-
Defective assembly A12
Replace assembly A12.
dication normal, external no
transition send alarm lighted,
and common ALARM may or
may not be lighted.
7
LINE MONITOR SEND jack
Defective assembly A6
Replace assembly A6.
indication normal, and external
loss-of-transmit-carrier alarm
is lighted.
8
Transmit bit-timing signals not
Defective assembly A5 .
Replace assembly A5.
available, but MD-674(P)/G
operates normally in all other
respects.
9
No receive data supplied from
Defective receive data section
a. Check for received fsk signal at
MD-674(P)/G, but bit-timing
test jack J2 on assembly A9;
signals are available.
if not present, replace assembly
A9.
b. Check for fsk signal at jack J2 of
assembly A25A3 connector (if
used) and jack J1; if present
at jack J1 and not J2, replace
assembly A25A3; if not present
at jack J1 or J2, replace
assembly A9.
c. Check for fsk signal at test jack
J1 on assembly A8; if not
present, replace MX-73(*)/G
module (para 4-6).
d. Check for fsk signal at pin M of
assembly A8 connector; if not
present, replace assembly A8.
e. Check ;or digital data (sine wave)
at pin L of assembly A8 con-
nector; if not present, replace
MX-73(*)/G module (para 4-6).
f. Check for digital data at pin K of
assembly A8 connector; if not
present, replace assembly A8.
g. Check for digital data at pin R of
assembly A8 connector; if not
present, replace MX-73(*)/G
module (para 4-6).
h. Check for digital data at pin Z of
assembly A8 connector; if not
present, replace assembly A8.
Change 5
4-5
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