TM 1–1520–238–T–1
3–15
3–3
APU – OPERATING INSTRUCTIONS (cont)
3–3
Pilot Station
PANEL
SWITCH/CONTROL
POSITION
(set to)
ELEC PWR
EXT PWR RESET
Momentary
press and
release (Not
necessary if
using aircraft
battery power)
BATT/OFF/EXT PWR
BATT (If AGPU
or equivalent is
on–line and
providing
electrical
power, set
switch to EXT
PWR)
CSC
Transmitter
Select
ICS
MIC
1 (for
maintenance
headset without
power adapter)
2 (for helmet or
maintenance
headset with
power adapter)
ICS SELECT
NORM
VOL
As desired
APU
FIRE/TEST
(fig. 2–21)
PRI/RES
Centered
7. Locate communications cable on left–hand side of CPG
seat.
8. Attach microphone headset/microphone adapter cord
plug to communications cord receptacle.
9. Verify CPG station switch/control settings as follows:
