TM 9-4120-398-14
4-28. INTERNAL CONTROL BOARD (cont)
(a) Test for continuity between points 7-1,8-2, and 9-3.
(b) Depress center bar and test for continuity between points 7-4,8-5, and 9-6.
(c) If continuity is not found in either test, replace relay.
(b) If continuity is found, replace time delay relay (K6).
Tag and disconnect five power cable leads (1).
(1)
Remove four nuts (2), lockwashers (3) and panel (4).
(2)
Disengage terminal board from unit.
(3)
Remove four screws (5), lockwashers (6), nuts (7), and motor starter (K3) (8).
(4)
Remove two screws (9), lockwashers (10), and nuts(11) for each contactor (K1, K2, K7, and K8) (12).
(5)
Remove screw (13), lockwasher (14), nut (15), and time delay relay (K6) (16).
(6)
(7)
(8) Remove two screws (20), lockwashers (21), nuts (22), and TB2 (23).