TM 55-4920-328-13
Table 2-5. Function of Controls and Indicators --Continued
INDEX AND
REFERENCE
FIGURE NO.
NOMENCLATURE
DESIGNATION
FUNCTION OR INDICATION
SERVICES SUB-MODULE (figure 1-25)-Continued
24, figure
Lamp TEST SWITCH-
S9
Test the lamps in the switchlight units
1-25
light Unit
installed in services panel assembly
4A1.
25, figure
ACK Switchlight
S8
When energized, silences the audible
1-25
Unit
alarm and causes the ALARM DISPLAY
indicators to remain continuously on
during test of the alarm system.
26, figure
TEST Switch-
S7
Used to test the alarm system. When
1-25
light Unit
energized, the ALARM DISPLAY indi-
cators flash on and off and the audible
alarm sounds.
27, figure
ENGINE DC Switch-
S6
Energizes relay XK1 in the engine dc
1-25
light Unit
starting system.
28, figure
115 VAC 400 HZ
S5
Energizes the 115v ac, 400 Hz circuit
1-25
Switchlight Unit
used for excitation of the EXHAUST
GAS TEMP indicator (38, figure 1-24).
29, figure
INST DC Switch-
S4
Energizes relay XK2 to apply 117v ac,
1-25
light Unit
60 Hz power to the six dc power supply
units in panel 4A12.
30, figure
CONSOLE DC Switch-
S3
1-25
light Unit
Used to energize the dc power supply
assembly in Unit 1.
31, figure
26 VAC 400 HZ
S2
Used to energize the 26v ac, 400 Hz
1-25
Switchlight Unit
power supply in Unit 1.
2-32
