TM 5-3895-385-23-1
0187
Table 1. Left Screed Horn Keypad Fault Troubleshooting Procedures -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y4 P1
Pin C and Y4 P2 Pin C (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y4 (WP 0386, Vol 2).
6. Measure for continuity (WP
1. If continuity is present, proceed
0443, Vol 3) between
to next test.
communication connector Y4 P1
Pin C and Y4 P3 Pin C (WP
0451, Vol 3, Figure 49).
2. If no continuity is present,
replace communication
connector Y4 (WP 0386, Vol 2).
27. Communication connector Y4
1. Measure for continuity (WP
1. If continuity is present, replace
has a short circuit.
0443, Vol 3) between
communication connector Y4
communication connector Y4 P1
(WP 0386, Vol 2).
Pin A and all other pins on Y4
P1 (WP 0451, Vol 3, Figure 49).
2. If no continuity is present,
proceed to next test.
2. Measure for continuity (WP
1. If continuity is present, replace
0443, Vol 3) between
communication connector Y4
communication connector Y4 P1
(WP 0386, Vol 2).
Pin B and all other pins on Y4
P1 (WP 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) between
communication connector Y4
communication connector Y4 P1
(WP 0386, Vol 2).
Pin C and all other pins on Y4
P1 (WP 0451, Vol 3, Figure 49).
2. If no continuity is present,
replace left screed horn keypad
(WP 0241, Vol 2).
0187-20