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TM 55-4920-412-13&P
Table 3-1. Operator's Controls (Cont)
Control, indicator or connector
Function
UNIT TESTER (Cont)
ROTOR OVERSPEED switches
127%
Selects overspeed signal for 127%.
137%
Selects overspeed signal for 137%.
142%
Selects overspeed signal for 142%.
RESET ON OFF ON switch
Resets latching relays (warning indicators) in SDC.
CDU test points
AD/P
Auto dim pilot display
+10V
+10V Regulated output
-10V
-10V Regulated output
AD/CP
Auto dim copilot display
5V
5V regulated output
PDU test points
AD/O
Auto dim output
INHIBIT (Left)
Analog clock inhibit - positive pulses 5V amplitude
5V
5V regulator output
INHIBIT (Right)
Digital clock inhibit - positive pulses 5V amplitude
INTERFACE MONITOR Digital display
Provides Digital readouts for both analog and Digital channels.
SIGNAL DATA CONVERTER test points
AC1
Engine oil pressure excitation: 7.5 VRMS to 11 V.
AC2
Transmission oil pressure excitation.
AC3
CDU reference excitation source.
CONT
Lamp power supply control voltage.
L/S
Lamp power supply output voltage.
CLOCK
Squarewave 4V to 6V amplitude, period 6.8 to 8.8 sec.
(128 kHz prime clock).
IL/S
Internal lamp supply voltage.
FUEL H
Wiring continuity with FUEL L, monitor range of dc voltage
for fuel quantity simulation.
WIRE
Wiring continuity of transmission oil temperature.
+10V
Regulated +10 volts from the SDC.
-10V
Regulated -10 volts from the SDC.
5V
Regulated +5 volts from the SDC.
+15.5V
+ 15.5 volts unregulated
8V
+8 volts unregulated
-15.5V
-15.5 volts unregulated
W/C
SDC wiring check
FUEL L
See FUEL H
COM
AC and dc common return
3-8
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