iv • Contents 8018653 1.1
4.1 Fault analysis procedure..................................................... 4-1
4.2 Troubleshooting flowcharts................................................ 4-2
4.3 Startup diagnostics procedure........................................... 4-11
5Maintenance................................................................................ 5-1
5.1 Periodic maintenance.......................................................... 5-1
5.2 Electrostatic discharge control ........................................... 5-2
5.3 Required tools for maintenance.......................................... 5-2
5.4 Replacement procedures..................................................... 5-2
Replacing BSC circuit modules ...................................... 5-4
5.5 Standard HNS return and repair procedure ........................ 5-6
Factory return procedure................................................. 5-6
Domestic Returns....................................................... 5-7
International Returns ................................................. 5-7
AAcronyms and abbreviations..................................................... A-1