Rotor Overspeed (Unit Tester)

TB 9-4920-361-24

Figure 5. Unit tester - pin locations.

b. Adjustments. No adjustments can be made.

20. Rotor Overspeed (Unit Tester)

a. Performance Check

(1) Disconnect lead from J2 pin 43 and connect to J6 pin 31 on unit tester.

(2) Set ROTOR OVERSPEED 127% switch to ON.

(3) Set ON-OFF-SIM ONLY switch to ON. Multimeter will indicate between 4.5

and 5.5 V dc.

(4) Set ROTOR OVERSPEED 127% and ON-OFF-SIM ONLY switches to OFF.

(5) Disconnect lead from J6 pin 31 and connect to J6 pin 32.

(6) Repeat (2) through (4) above, except use ROTOR OVERSPEED 137% switch.

(7) Disconnect lead from J6 pin 32 and connect to J6 pin 33.

(8) Repeat (2) through (4) above, except use ROTOR OVERSPEED 142% switch.

b. Adjustments. No adjustments can be made.

21. Central Display and Signal Data (Unit Tester)

a. Performance Check

(1) Disconnect lead from J6 pin 33 and connect to J2 pin 1 on unit tester.

(2) Set LOGIC P/S switch to 1.