Page 3-2 V10/V7.5/V5/V3.5 Installation and Operation ManualIssue 3.5 Section 3 Operating Instructions3.4 ELECTROSTATIC DISCHARGEPROTECTIONThe transmitter's assemblies containsemiconductor devices that are susceptible todamage from electrostatic discharge (ESD).Observe the following precautions whenhandling an assembly that contains thesedevices:NOTEElectrostatic energy is produced when twoinsulating materials are rubbed together. Aperson wearing rubber-soled shoes, walkingacross a nylon carpet or a waxed floor cangenerate an extremely large electrostaticcharge. This effect is magnified duringperiods of low humidity.This high voltage may damagesemiconductor devices such as integratedcircuits, field-effect transistors, thyristors andSchottky diodes unless adequate precautionsare taken.3.4.1 Discharging of PersonnelMaintainers must be electrically dischargedby a suitable ground system (anti-static mats,grounding straps) when removing anassembly from the transmitter and whilehandling the assembly for maintenanceprocedures.3.4.2 Handling/StoragePlace the assembly in an anti-static bag whenit is not installed in a host transmitter or whenit is not being subjected to maintenanceprocedures. Electronic components should bestored in anti-static materials.3.4.3 Tools/Test EquipmentTesting and maintenance equipment,including soldering and unsoldering tools,should be suitable for contact with staticsensitive semiconductor devices.3.4.4 Stress Current ProtectionAlways ensure the static sensitivesemiconductor devices are protected fromunnecessary stress current. This is achievedby ensuring:• Current is not flowing when an electricalconnection is broken.• Voltages are not present on externalcontrol/monitoring circuits when they areconnected.3.5 CONTROLS AND INDICATORSNautel recommends the operator/maintainerbe familiar with the transmitter's controls andindicators before operating the transmitterand/or attempting to perform fault diagnostics.In most cases, controls and indicators arepresented in an assembly-by-assemblyformat. A mechanical drawing and anassociated table are provided as aids tolocating and understanding the assembly’scontrols and indicators.NOTEOn some mechanical drawings, numberedcallouts are provided to cross-reference thecontrol/indicator to the description table.The names used in the PANEL MARKINGcolumn of the controls and indicators tablesare intended to be the closest possiblerepresentation to the item’s label/silkscreen.
