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F-23	TROUBLESHOOTING & REPAIR

TRANSISTOR MODULE TEST

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10.Replace the terminal screw snugly, a little more than finger tight. The Transistor Module is mounted behind the Power Board and the terminal screw completes the electrical connection.

11.Perform the following resi- tance tests listed in Table F.1:

NOTE: Meter lead polarity must be observed for these resistance tests.

a. If a low resistance is measured in both polarities, the transistor module is “shorted.” Replace the transis- tor module, the Power Board, and the Control Board.

b. If a high resistance is measured in both polarities, the transistor module is “open.” Replace the transistor module, the Power Board, and the Control Board.

12.Replace all leads.

a.Torque screws to 17 in./lbs. ( 1.9 N.M.)