TM 55-4920-413-13&P
Table 3-1. Operator’s Controls (Cont)
Control, indicator or connector
ROTOR SPEED
NOR CAL
HI LO
Variable control
LOW ROTOR SPD
ROTOR OVER SPD RESET switch
LAMP SUPPLY OVERLOAD NO. 1
LAMP SUPPLY OVERLOAD NO. 2
LAMP SUPPLY OVERLOAD switch
INPUT POWER Lamps:
115 VAC
28 VDC
INPUT POWER switch
LAMP TEST switch
INTEGRAL LIGHTING switch
115 VAC 2A fuse
28 VDC 8A fuse
5 VAC 8A fuse
Function
Selects mode of operation - normal or calibration for check-
ing % RPM R indicator.
When ROTOR NOR CAL switch is set to CAL, HI LO switch
allows high and low calibration points of % RPM R indicator
to be checked.
Used when NOR CAL switch is at NOR, to check operation of
Rotor Speed indicator as simulated % RPM rotor speed signals
cover range from minimum to maximum.
Indicates operation of ROTOR SPEED LO switch.
Used to reset rotor overspeed warning indicator,
Indicates operation of LAMP SUPPLY OVERLOAD switch.
Used to select NO. 1 and NO. 2 lamp supply overload
conditions.
When lighted they indicate this:
AC input power is applied.
DC input power is applied,
Three-position switch that controls application of 115 vac and
28 vdc power. At ON, input power is connected.
At OFF, input power is disconnected, At SIM ONLY, input
power to interconnect connector (J5) is removed. This
removes power from Unit Tester, de-energizing it without
removing power from SIMULATOR.
NO. 2 Low Oil Pressures, NO. 1 and NO. 2 High Oil Tempera-
ture, Low Rotor Speed, NO. 1 and NO. 2 Engine Out, and both
Lamp Supply Overload lamps on LTS.
To select internal or external integral lighting power.
AC power line fuse. Fuse blows if primary circuits of trans-
formers T1, T2, T3, T4 become overloaded due to circuit
malfunction.
DC input power fuse, protects 28 vdc circuits.
Protects 5 vac lighting circuits.
3-6
