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) between
communication connector Y12
communication connector Y12
(WP 0386, Vol 2).
P1 Pin B and all other pins on
Y12 P1 (WP 0451, Vol 3, Figure
33).
2. If no continuity is present,
proceed to next test.
3. Measure for continuity (WP
1. If continuity is present, replace
0443, Vol 3) between
communication connector Y12
communication connector Y12
(WP 0386, Vol 2).
P1 Pin C and all other pins on
Y12 P1 (WP 0451, Vol 3, Figure
33).
2. If no continuity is present,
proceed to next malfunction.
24.Communication connector Y14
1. Measure for continuity (WP
1. If continuity is present, proceed
has an open circuit.
0443, Vol 3) between
to next test.
communication connector Y14
P1 Pin A and Y14 P2 Pin A (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y14 (WP 0386, Vol 2).
2. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y14
P1 Pin A and Y14 P3 Pin A (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y14 (WP 0386, Vol 2).
3. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y14
P1 Pin B and Y14 P2 Pin B (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y14 (WP 0386, Vol 2).
0187-17