2-306.16
Change 4
TM 9-2350-267-20
c
WARNING
Turn crew AFES T/A panel Maintenance switch to
vertical position before disconnecting any electrical wiring
harnesses. Failure to comply may result in discharge of
extinguisher cylinders and injury to personnel.
Disconnect harness 12352353 connectors from OFSAs. Place red lead of
multimeter in socket A (wire 783A, 783B, 783C, or 783D) of the four
connectors and ground black lead. With the aid of an assistant, turn
MASTER switch ON (TM 9-2350-267-10), and turn crew AFES T/A panel
Maintenance switch to horizontal position. Check for 24 ± 3 vdc. Turn
MASTER switch OFF (TM 9-2350-287-10), and turn crew AFES T/A panel
Maintenance switch to vertical position. If voltage is indicated at the
OFSA's, replace defective OFSA(s) (p 14-34). If voltage is not indicated, go
to step D.
D. Disconnect harness 12352353 connector from the standard control electronic
amplifier (SCEA). Check for continuity between:
1.
2.
3.
4.
Socket A of OFSA connector W1P2 and pin A of SCEA
connector (wire 783A).
Socket A of OFSA connector W1p2 and pin A of SCEA
connector (wire 783A).
Socket A of OFSA connector W1P4 and pin T of SCEA
connector (wire 783C).
Socket A of OFSA connector W1P5 and pin B of SCEA
connector (wire 783 D).
If continuity is indicated on all four wires, replace standard control electronic
amplifier (SCEA) (p 14-40). Verify problem is solved. If continuity is not
indicated, replace wire harness 12352353 (p 14-40.2). Verify problem is
solved.