ElectricalTroubleshooting GuideIRB6400 M94APage 2 - 6Computer System2.3 Troubleshooting2.3.1 GeneralESD ALERT!! ESD ALERT!!In this computer system ALL computer boards arestatic sensitive.'ESD' is Electro Static Discharge.ESD is the charge you get from walking across a newcarpet floor and then touch an object with a differentpotential.In the case of carpeting, this voltage is very, very high.ESD is on our bodies at ALL times. There is enoughvoltage to damage computer board electronics when itis discharged through them.IT IS CRITICAL THAT BEFORE HANDLING ANYCOMPUTER BOARD TO PUT ON THE GROUNDSTRAP THAT IS ATTACHED TO THE SWING GATEOF THE CONTROL CABINET.This applies to all boards in the system. If you need toput a board down or carry it to another location put it intothe special static free bag that comes with each controllerfirst.If this procedure is not followed every time a board ishandled damage WILL be done to the board even if noapparent damage is evident.Never remove any computer component withpower ON.In general, when troubleshooting the system begin by:1) Reading any error messages shown on the teachpendant display.2) Check the systems error log bya) pressing MISCb) selecting Servicec) press Viewd) select Error Log3) Check the LEDs on the front of the boards in thesystem. The LEDs will indicate board failures. TheLEDs are explained later in this chapter.4) Try restarting the system. When the system isrestarted the computer runs diagnostics that canbe helpful when troubleshooting. Also restartingresets the system software.5) If needed check wiring by using the circuit diagrams.6) Remember to check for mechanical problems.Fig. 2-1 ..............Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
