TM 1-1520-238-T-6
9–224
Change 5
9–49.
ELECTRICAL POWER – DOES NOT COME ON AFTER EXT PWR RESET SWITCH
9–49
HAS BEEN PRESSED (cont)
10. Check for open between(A402)K2:
J1-9 and J1-10.
Does open exist?
YES
Replace generator 2 contactor
(TM 1-1520-238-23).
NO
Repair open wire between:
J14-E and P433-A1,
P172-B7 and P430-A2,
(A402)J20-A1 and
(A402)P11-10,
(A402)J6-A2 and (A402)P11-9.
Go to paragraph 9–45.
11. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR. Check for open between
(A125)J1-B7 and (A125)J1-B8.
Does open exist?
YES
Go to step 12.
NO
Go to step 13.
12. Check for open between (A125):
J1-B7 and S4-4,
J1-B8 and S4-5.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–45.
NO
Replace BATT/EXT PWR switch
(A125)S4 (TM 55-1520-238-23).
13. Check for open between P172-B8 and
(A402)K7-A1.
Does open exist?
YES
Go to step 15.
NO
Go to step 14.
14. Check for open between (A402)K7-B2 and
ground.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–45.
NO
Replace external power
contactor
((TM 55-1520-238-23).
15. Check for open between (A402)K1:
J1-9 and J1-10.
Does open exist?
YES
Replace generator 1 contactor
(TM 55-1520-238-23).
NO
Repair open wire between:
P439-B6 and P172-B8,
(A402)P5-9 and (A402)K7-A1,
(A402)P5-10 and (A402)J21-B6.
Go to paragraph 9–45.
END OF TASK
