TM 5-3895-385-23-1
0187
Table 1. Left Screed Horn Keypad Fault Troubleshooting Procedures -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Measure for continuity (WP
1. If continuity is present, replace
0443, Vol 3) between
communication connector Y14
communication connector Y14
(WP 0386, Vol 2).
P1 Pin C and all other pins on
Y14 P1 (WP 0451, Vol 3, Figure
49).
2. If no continuity is present,
proceed to next malfunction.
26. Communication connector Y4
1. Measure for continuity (WP
1. If continuity is present, proceed
has an open circuit.
0443, Vol 3) between
to next test.
communication connector Y4 P1
Pin A and Y4 P2 Pin A (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y4 (WP 0386, Vol 2).
2. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y4 P1
Pin A and Y4 P3 Pin A (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y4 (WP 0386, Vol 2).
3. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y4 P1
Pin B and Y4 P2 Pin B (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y4 (WP 0386, Vol 2).
4. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y4 P1
Pin B and Y4 P3 Pin B (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y4 (WP 0386, Vol 2).
0187-19
