TM 5-3895-385-23-1
0187
Table 1. Left Screed Horn Keypad Fault Troubleshooting Procedures -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. If no damage or loose
connection is found, proceed to
next malfunction.
5. Communication cable C2 has
1. Disconnect communication cable
an open circuit.
C2 J1 from Y4 P3 (WP 0451, Vol
3, Figure 49).
2. Disconnect communication cable
C2 J2 from Y14 P1 (WP 0451,
Vol 3, Figure 49).
3. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) from C2 J1 pin A to
to next test.
C2 J2 pin A (WP 0451, Vol 3,
Figure 49).
2. If no continuity is present,
replace damaged
communication cable (WP 0386,
Vol 2).
4. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) from C2 J1 pin B to
to next test.
C2 J2 pin B (WP 0451, Vol 3,
Figure 49).
2. If no continuity is present,
replace damaged
communication cable (WP 0386,
Vol 2).
5. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) from C2 J1 pin C to
to next malfunction.
C2 J2 pin C (WP 0451, Vol 3,
Figure 49).
2. If no continuity is present,
replace damaged
communication cable (WP 0386,
Vol 2).
6. Communication cable C2 has
1. Measure for continuity (WP
1. If continuity is present, replace
short circuit.
0443, Vol 3) from C2 J1 pin A 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.
0187-6