Operator’s Controls (Cont)

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