TM 9-2350-247-20-1INTRODUCTION TO HOW TO USE TROUBLESHOOTING 0005 00PURPOSEThe purpose of unit maintenance level troubleshooting is to diagnose carrier problems which are reported to unitmaintenance. Troubleshooting tasks in this manual are common to all carriers except where indicated. You should not beginunit maintenance troubleshooting until all operator troubleshooting procedures have been completed. You will perform fouractions in unit maintenance troubleshooting:(1) Before starting a troubleshooting task, verify that the reported problem is present in the carrier.(2) After verifying the symptom, find the part that is causing the problem.(3) Replace or adjust that part.(4) Check to make sure the problem no longer exists, and that there are no other problems.DEFINITIONS AND DESCRIPTIONS OF TROUBLESHOOTING PROCEDURESTroubleshooting tasks always have a beginning and an end. You will use task steps, test procedures, indexes, maintenancetasks, and other technical manuals to troubleshoot. Troubleshooting uses the following terms that are not used in other kindsof tasks:1. FAULT:The part that is not operating correctly and is causing the problem.2. SYMPTOM:The problem reported to unit maintenance.3. VERIFY NO FAULTSFOUND:After you have completed the corrective action, you must verify that no faults exist.If the fault condition still exists, then the fault is not fixed or there is another fault.If this happens, start at the beginning of the troubleshooting procedure until youfind and correct all faults. Always operate the system and/or carrier to make surethat you have corrected the reported problem. If troubleshooting does not identify afaulty part, the carrier is defective beyond the level of unit maintenance.4. LIGHT BULB CHECK:In troubleshooting tasks checking indicator lights, light bulb is good if multimeterindicates any continuity.TROUBLESHOOTING BASICSTroubleshooting ProcedureA troubleshooting procedure serves as a starting point for your troubleshooting work. You will branch in and out ofprocedures as you work to find a fault. Also, you will correct the fault and check that the fault has been corrected. The partsof a troubleshooting procedure are given below.Legend1 TITLEThis is the name of the procedure.2 INITIAL SETUPThis tells you the tools, materials/parts, personnel, references, and equipmentconditions needed to do the procedure.3 TASK STEPSThese boxes give you step-by-step instructions.4 ILLUSTRATIONSThese help you locate and identify parts.5 QUESTIONSThis is the last step in YES blocks. The answer to this question will direct you tothe next block.6 REFERENCE LETTERThis will send you to the correct block to continue with the troubleshootingprocedure.0005 00-1
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
