TM 5-6675-250-10
2-1. OPERATOR'S CONTROLS AND INDICATORS - Continued
(3) Power on indicator (3). The applica-
tion of power to the system is indicat-
ed by the illumination of the PWR ON
indicator. Failure of the indicator to
light when the ECU is connected to a
power source, and when the MODE
SELECT switch is moved from the
PWR OFF or THEO ILLUM positions,
indicates a malfunction in the sys-
tem.
(4)
Press to test switch (4). The PRESS
TO TEST switch is pressed to obtain
a TEST METER indication for each
t e s t position setting of the TEST
S E L E C T switch. Operation of the
PRESS TO TEST switch is needed
only during the self-test procedure to
obtain an indication on the TEST
METER.
( 5 ) Test select switch (5). The TEST
is
in
SELECT
used
switch
conjunction with the TEST METER to
check subsystems of the equipment
and stages of operation. During self-
test operations, the selector switch is
placed to each of its positions. At
each position the PRESS TO TEST
switch is pressed and operability of
the associated circuit is indicated on
the TEST METER (pointer in green
area for all but SOURCE VOLTAGE,
w h i c h is displayed on the upper
meter scale and GYRO, which should
center in yellow area).
2-10
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