R5 SUPREME AIS SystemTROUBLESHOOTING7000 118-300, A3 Page 688 TROUBLESHOOTINGOne of the basic ideas with troubleshooting is to solve a supposed problem on site instead ofimmediately sending the suspected part for a costly repair. Solving a supposed problem would inthis aspect mean both to rectify the real problem, but it could also mean that the suspected part isconfirmed to be working or not-working.Historically, many of the parts sent to Saab TransponderTech for repair have in fact been confirmedworking instead. Another common scenario is that the equipment has faulty I/O settings or othererroneous configurations, easy to fix on site. A proper troubleshooting would ideally prevent thoseunnecessary returns of fully functional equipment.There are numerous ways to troubleshoot a transponder installation, much dependant on the skilland experience level of the troubleshooter. The preferred approach may probably also differbetween different individuals, and there is no such thing as right or wrong.This chapter is not intended to be a step by step troubleshooting instruction, but instead offer atoolbox with some different techniques on how to troubleshoot the R5 SUPREME AIS System.8.1 Troubleshooting PrerequisitesA transponders operating environment may naturally differ widely, ranging from small high-speedRIB‟s to very large SOLAS tankers, military aircraft carriers and even submarines. The diversityof installation environments will of course have impact on the complexity of the troubleshooting,but it is always advisable to start with minimizing all possible interference sources in order tosimplify the troubleshooting. Disconnect other NMEA equipment from the R5 (ECDIS, RADAR, NAV, etc.) Switch off other emission sources (RADAR, SATCOM, VHF, etc.)We strongly encourage to always use the latest software available for the R5 SUPREME System.It may contain bug-fixes and other improvements solving already known issues. Always checkexisting release notes to see if your problem is to be found.8.2 Troubleshooting with the Front Panel LED’s of the TransponderIt is very fast and effective to use the LED‟s to verify the status of the R5 SUPREMETransponder. This should always be the first step in the troubleshooting.8.2.1 STATUS LED (multi-colored)- The STATUS LED is constantly lit green when the transponder is operating and noalarms are active.- The STATUS LED is constantly lit red if there are one or more acknowledged activealarms in the transponder, but no unacknowledged alarms. Refer to chapter 8.3 forinterpretation of the alarms.- The STATUS LED is flashing red if there are one or more unacknowledged alarms inthe transponder. Refer to chapter 8.3 for interpretation of the alarms.If neither color are lit, nor flashing, then check the power supply and make sure that: The voltage is correct and stable The polarity is correct and not switched The available current is sufficient for start up and transmission The external fuse is functional