TTB-9-2920-225-34-1 Regulator Check Out and Repair 100 Amp 2920-00-900-7993 Download
Page 6 of 28
TB 9-2920-225-34-1 d. DO—Use a 60W AC or DC soldering iron. Solid state components are easily damaged by ex- cessive heat. e. DON’T—Allow wires to become pinched be- tweencovers, heat sinks, circuit boards, etc. f. DON’T—Use a screwdriver to pry up transis- tors during removal. The mica washer between the transistor and the circuit board or heat sink is thin and can be easily damaged. g. DON’T—Drop transistors since they are easily damaged. If a transistor is dropped it should be checked before being installed in the circuit. h. DO—Check transistor insulating washers and replace if cracked, broken, or missing. Coat washers with insulation compound (silicone) per MIL-S-8660, NSN 6850–00–880–7616. i. DO—After repair, remove all excess solder. Check for loose wires, screws, and washers which could cause short circuits and burnouts when power is applied to the regulator. j. DO—Check the regulator cover seal, replace if cracked or missing. Coat the seal with insula- tion compound (silicone) per MIL-S-8660, NSN 6850-00–880–7616. k. DO—Apply adhesive 8040–877–9872 to the adjustment access plug or screw. . 1-3