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, proceed
0443, Vol 3) between
to next test.
communication connector Y12
P1 Pin B and Y12 P2 Pin B (WP
0451, Vol 3, Figure 33).
2. If no continuity is present,
replace communication
connector Y12 (WP 0386, Vol 2).
4. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y12
P1 Pin B and Y12 P3 Pin B (WP
0451, Vol 3, Figure 33).
2. If no continuity is present,
replace communication
connector Y12 (WP 0386, Vol 2).
5. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y12
P1 Pin C and Y12 P2 Pin C (WP
0451, Vol 3, Figure 33).
2. If no continuity is present,
replace communication
connector Y12 (WP 0386, Vol 2).
6. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next malfunction.
communication connector Y12
P1 Pin C and Y12 P3 Pin C (WP
0451, Vol 3, Figure 33).
2. If no continuity is present,
replace communication
connector Y12 (WP 0386, Vol 2).
23. Communication connector Y12
1. Measure for continuity (WP
1. If continuity is present, replace
has a short circuit.
0443, Vol 3) between
communication connector Y12
communication connector Y12
(WP 0386, Vol 2).
P1 Pin A and all other pins on
Y12 P1 (WP 0451, Vol 3, Figure
33).
2. If no continuity is present,
proceed to next test.
0187-16