NCR RealPOS 70 - Inverter; Touch Screen

Chapter 1: Product Overview 1-21
Inverter
AninverterisusedtodrivetheCCFL(coldcathodefluorescent)
backlightsoftheLCD.SincetheinverterismatchedtotheLCD,the
12.1”,15”,and17”displayshavedifferentinverters.Inverteroutput
powerisapproximately9wattsforthe12.1”display,13wattsforthe
15”,and15watts
forthe17”.Theinvertermountstothebackofthe
LCDbracketnearthePCIslot.Acoverprotectspersonneland
surroundingcircuitryfromthehighvoltagerequiredtodrivethe
backlighttubes.The17inchinvertermountsdirectlybehindtheLCD
panel,undertherearbezel.
Touch Screen
The7402supportseitherafive‐wireresistiveTouchscreenora
CapacitiveTouchscreen.AhardwarejumperontheRetailDaughter
Cardselectsresistiveorcapacitivemode.
Allapplicationsanddiagnosticsusethetouchinterfaceforuser
interaction.ThetouchscreenglasscompletelycoverstheLCDdisplay
andismounteddirectlyin
frontoftheLCD,behindthefrontplastic
bezel.TheMicroTouchEXIIchipsetisusedtocontroltheTouchscreen,
whichisconnectedtotheRetailDaughterCardthroughaninternal
RS232cableandinterface.TheTouchscreenisdesignedtobeeasily
replacedincaseofdamageorfailure.