Table 5-1. Direct Support Troubleshooting (cont)

TM5-6625-2694-13&P

Table 5-1.

Direct Support Troubleshooting (cont'd.)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2.

Load Selector Switch(s) defective.

Disconnect power from Test Set.

Remove and tag leads from switch terminals.

Attach ohmmeter leads across switch terminals top to

bottom.

c. With Switch in on (up) position, ohmmeter should

read 0 Ohms. With Switch in off (down) position,

ohmmeter should read infinite.

Refer to

defective

replace

Switch(s).

Step 3.

Check Load Resistors.

Disconnect and tag lead from one end of Resistor.

Attach ohmmeter leads to Resistor terminals.

c. Ohmmeter should read 15 Ohms

for 1 KW Resistors

and 30 Ohms for 500 W Resistors.

defective

and

Refer

replace

Resistors.

VARIABLE LOAD CONTROL HAS NO EFFECT ON LOADING.

Measure AC voltage on TB1-1, TB2-1 and TB3-1 with respect to

Step 1.

AC Voltage should vary in direct

LO while varying the load control.

proportion to load control.

remove

If any phase exhibits no variation

and

replace T4.

Change