TM 11 6625-2440-12
Control, indicator, or connector
Ref des
Function
LEVEL indicator---------------------------------
1A1DS12
Lights when test set and platform mode control logic is in level phase of
align mode.
GC1 switch ---------------------------------------
1A1S6
HOLD: Provides switching to place and hold the test set and platform
mode control logic in the GC1 phase of align mode for 4 minutes and
until switched to OFF.
------------------------------------------------------
OFF: Permits test set and platform mode control logic to sequence
through GC1 phase of align mode.
GC1 indicator ------------------------------------
1A1DS14
Lights when test set and platform mode control logic is in GC1 phase of
align mode.
GC2 indicator ------------------------------------
1A1DS15
Lights when test set and platform mode control logic is in GC2 phase of
align mode.
COARSE HEATER indicator ----------------
1A1DS11
Indicates platform coarse heaters are energized.
SELF-TEST indicator --------------------------
1A1DS3
Indicates test set is in self-test mode.
PLATF PWR indicator -------------------------
1A1DS10
Indicates 115 vac and 28 vdc are applied to platform.
GSP TEST indicator ---------------------------
1A1DS4
Indicates test set is in platform test mode.
X switch -------------------------------------------
1A1S8
PLUS: Provides for manual slewing of platform stable element in a
positive direction about the X (pitch) axis.
MINUS: Provides for manual slewing of platform stable element in a
negative direction about the X (pitch) axis.
OFF: Inhibits manual slewing of platform stable element about the X
(pitch) axis.
Y switch -------------------------------------------
1A1S9
PLUS: Provides for manual slewing of platform stable element in a
positive direction about the Y (roll) axis.
------------------------------------------------------
MINUS: Provides for manual slewing of platform stable element in a
negative direction about the Y (roll) axis.
------------------------------------------------------
OFF: Inhibits manual slewing of platform stable element about the Y
(roll) axis.
Z switch -------------------------------------------
1A1S10
PLUS: Provides for manual slewing of stable element in a positive
direction about the Z (heading) axis.
------------------------------------------------------
MINUS: Provides for manual slewing of platform stable element in a
negative direction about the Z (heading) axis.
------------------------------------------------------
OFF: Inhibits manual slewing of platform stable element about the Z
(heading) axis.
FAST-SLOW switch ---------------------------
1A1S12
Operates in series with C-D unit PLATFORM SLEW switches to provide
two-speed selection for platform stable element slewing.
GB1-GB2 switch --------------------------------
1A1S14
operation.
PLATF RE CAGE switch ---------------------
1A1S7
Generates platform reset signal, causing platform mode logic in C-D unit
and platform to sequence through the cage phase and initiate the
level phase of the align mode.
PLATFORM indicator--------------------------
1A1DS6
Indicates a malfunction in platform power turn-on sequence logic.
MONITOR indicator ----------------------------
1A1DS7
Indicates a platform malfunction.
OVERTEMP indicator -------------------------
1A1DS5
Indicates overtemperature condition in platform.
TEST SET indicator----------------------------
1A1DS9
Indicates test set malfunction.
MONITOR OVERRIDE switch---------------
1A1S13
Overrides platform malfunction indicated by CD unit MONITOR indicator
and allows operation of platform.
MAT HDG SERVO indicator -----------------
1A1DS8
Indicates a platform magnet ic heading servo malfunction.
READING SIMULATOR ----------------------
1A1B1
Provides selection of a desired azimuth angle to which a platform stable
element will be driven, with respect to platform heading during the
cage phase of align mode.
LAMP TEST switch-----------------------------
1A1S4
Energizes all indicator lamp circuits when pressed, as a test of the
indicator lamps.
ELAPSED TIME meter ------------------------
1A1M1
Indicates total time that CD unit has been in operation.
Connector J3 ------------------------------------
1A1J3
Provides power connection between CD unit and electronics unit.
Connector J4 ------------------------------------
1A1J4
Provides control signal connection between CD unit and electronics unit.
BREATHER VALVE ---------------------------
Provides two-way pressure equalization.
b. Electronics Unit; Controls, Indicators, and
indicators, except the LATITUDE switch, are located on
the front panel. The LATITUDE switch is located inside
Connectors (fig. 3-2). The following chart lists controls,
the combination case at the rear of the unit (fig. 4-2).
indicators, and connectors with their reference
Control-display unit is abbreviated C-D unit in the chart.
designations and functional descriptions. All controls and
3-2
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