TM 11-5820-890-30-4CAUTIONSteps marked withmust be performed exactly as written. They are critical in maintainingthe nuclear hardness of the power supply adapter. Seals must not be damaged. All screws mustbe torqued to the limits specified in the replacement procedures.13-17. REPLACEMENT OF HEAT SINK ASSEMBLY (8A1).Tools:Flat tip screwdriverTorque screwdriverITEMACTIONREMARKSREMOVALa.Power supply adapter (1)b. 18 captive screws (3)c.Six screws on terminalboard TB1 (4) and wiresd. Heat sink assembly (2)e.Sealing gasketf.Heat sink assembly (2)INSTALLATIONg.h.i.j.k.Heat sink assembly (2)Sealing gasketHeat sink assembly (2)Heat sink assembly wiresand six screws on termi-nal board TB1 (4)Heat sink assem-bly and 18 captive screws(3)Set upside down on work surface with reartoward you. See figure 13-2.Use flat tip screwdriver. Fully loosen, andinspect for damage. If damaged, obtainreplacement.Use flat tip screwdriver. Remove and inspectsix screws securing wires to TB1. Disconnectwires. If damaged, obtain replacement.Remove heat sink assembly from power supplyadapter and set on work surface.Remove and check for damage. If damaged,obtain replacement.Turn in defective heat sink assembly to supplyfor disposition.Obtain replacement heat sink assembly.Place on replacement heat sink assembly.Set on work surface so that wirescan be connected to TB1 (4).Connect to TB1 (4). Wire labeled "1"These were removed inconnects to TB1 terminal 1. Repeatstep c.for all six wires. Use flat tip screwdriver.Install and tighten six retained screwssecuring wires to TB1.Use flat tip screwdriver. Hold heat sinkassembly (2) in place on power supplyadapter (1). Install and hand tighten 18captive screws. Use torque screwdriver.Torque screws to 8 to 10 in-lb.13-28
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