TM 55-1520-240-T
9-1.4
DC POWER SYSTEM OPERATIONAL CHECK (Continued)
9-1.4
TASK
RESULT
3.
Set BATT switch (14) to ON.
MASTER CAUTION lights (15) shall come on. NO. 1
RECT OFF and NO. 2 RECT OFF (Without 74) RECT 1
and RECT 2 (With 74) capsules (16 and 17) shall be on.
If lights do not come on, replace battery. Refer to
TM 55-1520-240-23. If lights still do not come on, go to
task 9-1.5. If either capsule (16 or 17) is not on, go to
task 9-1.6.
4.
Press and release BATTERY CHARGING and
Lights (18 and 19) shall momentarily come on. If either light
CHARGE COMPLETE lights (18 and 19).
does not come on, go to task 9-1.7.
5.
Start apu. Refer to task 15-1.5.
APU ON capsule (20) shall come on.
6.
Set APU GEN switch (21) to ON.
NO. 1 RECT OFF and NO. 2 RECT OFF (Without 74)
RECT 1 and RECT 2 (With 74) capsules (16 and 17)
shall go out. APU ON capsule (20) shall stay on. If
capsules (16 and 17) are still on, go to task 9-2.5. If only
NO. 1 RECT OFF (Without 74) RECT 1 (With 74)
capsule is still on, go to task 9-1.8. If only NO. 2 RECT
1 OFF (Without 74) RECT 2 (With 74) capsule is still on,
go to task 9-1.9.
7.
Check BATT SYS MAL capsule (24).
BATT SYS MAL capsule (24) shall be out. If it is on, open
and then dose BATT CHGR circuit breaker (1). If capsule
(24) is still on, go to task 9-1.11.
8.
Check air flow from No. 1 transformer-rectifier (22).
Air shall flow from rectifier (22). If not, replace rectifier.
9.
Check air flow from No. 2 transformer-rectifier (23).
Air shall flow from rectifier (23). If not, replace rectifier.
10.
Check BATTERY CHARGING and CHARGE COM-
Light (18 or 19) shall be on. If either light is not on, go to
PLETE lights (18 and 19).
task 9-1.10.
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Change 19 9-11
