TM9100 Service Manual General Information 97© Tait Electronics Limited August 20054 General InformationScope of Section This section discusses the two repair levels covered by the service manual,details concerning website access, the tools, equipment and sparesrequired, and the setting up of the necessary test equipment. Generalservicing precautions are also given, as well as details of certain non-standard SMT techniques required for level-2 repairs.4.1 Repair Levels and Website AccessRepair Levels This manual covers level-1 and level-2 repairs of TM9100 radios. Level-1 repairs comprise the replacement of control-head boards, main-boardassemblies, and other parts of the radio; level-2 repairs comprise repairsof control-head boards and, except for special items, main-boardassemblies. The special items are:■ digital board■ RF PAs (Q309 and Q310)■ CODEC 1 (IC204)■ copper plateReplacements of the connectors and volume-control potentiometer onthe control-head board are level-1 repairs. Replacements of theconnectors on the main-board assembly, however, are level-2 repairsbecause these repairs entail the disassembly of the main-board assembly.Important The circuit boards in the TM9100 radio are complex.They should be serviced only by accredited servicecenters (ASC). Repairs attempted without the necessaryequipment and tools or by untrained personnel mightresult in permanent damage to the radio.Accreditation ofService Centers Service centers that wish to achieve ASC status should contact TechnicalSupport. They will need to provide evidence that they meet the criteriarequired for accreditation; Technical Support will supply details of thesecriteria. These centers must then make available suitable staff for trainingby TEL personnel, allow their service facilities to be assessed, and provideadequate documentation of their processes. They will be accorded ASCstatus and endorsed for repairs of TM9100 radios after their staff havebeen trained and their facilities confirmed as suitable. Existing ASCsneed to apply for and be granted an endorsement for repairs of TM9100radios. All ASCs with the necessary endorsements may carry out level-1and level-2 repairs of these radios, whether under warranty or not.Skills and Resourcesfor Level-1 Repairs For level-1 repairs basic electronic repair skills are sufficient. Apart fromthe standard tools and equipment of any service center, certain torque