TM 11-6625-3081-237-2. TROUBLESHOOTING METHODOLOGY7 -2a. GENERALTroubleshooting is the process by which a problem is detected (identify that aproblem exists), isolated (eliminate from a suspect group the cause of the problem),and repaired (restore system to proper operation).Troubleshooting methodology isthe method or how a problem is detected, isolated, and repaired.TADS/PNVS augmentation equipment uses a combination of built-in-test equipment(BITE) and operator interface/interaction to detect, isolate, and repair system inthe shortest time possible.TADS/PNVS augmentation equipment fall into thefollowing categories:ElectronicsCabinets, Slides, BaseBlowers, Lamps, Etc.Cables, HarnessesGlass, MechanicalThese categories are discussed in later paragraphs.(1) Detection.Faults can be detected by visual inspection, symptoms, functionalinference, and automatic diagnostic testing using BITE and software programs.Troubleshooting of TADS/PNVS augmentation equipment is done in this manner.Testing and troubleshooting of various electronic, electrical, electro-mechanical, and optical assemblies are done using BITE and a self-test program.This program contains 37 stand-alone self-test modules. Each module tests aparticular function or system operation (refer to chapter 2 for an explanation ofself-test program and procedures).If no faults are detected, a pass message isdisplayed on the VDT.If a fault is detected, a failure message is displayed onthe VDT.(2) Isolation.Each self-test module will isolate a fault to a single function operation.This operation is dependent on a group of parts performing properly. To isolate theparts, each part is replaced beginning with the part most likely to fail. Thiscontinues until the part least likely to have failed is replaced. This willeliminate each member of that group until the failed part is found. Replacementorder is displayed on VDT screen.(3) Repair.When a malfunctioning part is identified, it is repaired and restored toits proper operation.Often, isolation and repair happen at the same time. Duringisolation, a part is replaced and self-test performed to verify system performance.If system does not function properly, then the next item is replaced. If systemdoes function properly, then last item replaced is bad. This item is eitherrepaired, sent to depot for repair, or discarded as applicable.7-3
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business