TM 1-1520-238-T-6
9–455
9–199. CIRCUIT PROTECTION SYSTEM (AC ESSENTIAL BUS 2 – CPG STATION) –
9–199
MAINTENANCE OPERATIONAL CHECK (cont)
Task
Result
b. On pilot ELEC PWR panel (fig. 9–170), set
BATT/EXT PWR switch to OFF.
M69-435
BATT / EXT PWR
SWITCH
Figure 9–170.
Pilot ELEC PWR Panel
c. Remove CPG circuit breaker panel 1
(TM 1-1520-238-23).
d. On pilot ELEC PWR panel, set BATT/EXT
PWR switch to EXT PWR.
e. Check for 115 VAC at:
P769-H
P769-B,
P769-E.
If 115 VAC is not present, go to paragraph 9–205.
f. Check for continuity between (A77):
J4-H and J3-4,
J4-B and J3-5,
J4-E and J3-6.
If continuity does not exist, go to paragraph 9–201.
g. Check for continuity between (A77):
J4-H and J2-1,
J4-B and J2-15,
J4-E and J2-22.
If continuity does not exist, go to paragraph 9–202.
h. Check for continuity between (A77):
J4-E and J2-16.
If continuity does not exist, go to paragraph 9–204.
i. Check for continuity between (A77):
J4-H and J1-9.
If continuity does not exist, go to paragraph 9–203.
2. Reinstall CPG circuit breaker panel 1 (TM 1-1520-238-23).
3. Perform EXTERNAL POWER – POWER DOWN (para 9–46).
