TM 5-3895-385-23-1
0187
Table 1. Left Screed Horn Keypad Fault Troubleshooting Procedures -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Measure for continuity (WP
1. If continuity is present, replace
0443, Vol 3) from C2 J1 pin B to
damaged communication cable
every other pin on C2 J1 (WP
(WP 0386, Vol 2).
0451, Vol 3, Figure 49).
2. If no continuity is present,
proceed to next test.
3. Measure for continuity (WP
1. If continuity is present, replace
0443, Vol 3) from C2 J1 pin C to
damaged communication cable
every other pin on C2 J1 (WP
(WP 0386, Vol 2).
0451, Vol 3, Figure 49).
2. If no continuity is present,
proceed to next malfunction.
7. Communication cable C3
Check communication cable C3 J1
1. If damage is found, replace
disconnected.
and J2 for proper connection and
communication cable C3 (WP
damage (WP 0451, Vol 3, Figure
0386, Vol 2).
49).
2. If communication cable is found
disconnected, reconnect
communication cable properly.
3. If no damage or loose
connection is found, proceed to
next malfunction.
8. Communication cable C3 has
1. Disconnect communication cable
an open circuit.
C3 J1 from W1 J12 (WP 0451,
Vol 3, Figure 49).
2. Disconnect communication cable
C3 J2 from Y14 P3 (WP 0451,
Vol 3, Figure 49).
3. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) from C3 J1 pin A to
to next test.
C3 J2 pin A (WP 0451, Vol 3,
Figure 49).
2. If no continuity is present,
replace damaged
communication cable (WP 0386,
Vol 2).
0187-7
