LG 27UL550 - Main PCB Check Process (SMT); Adjustment Instruction

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Only training and service purposes
ADJUSTMENT INSTRUCTION
1.Application
1.1 This document is applied to LM8CA chassis 27BL55U/27UL550 & 27UL500 LCD Monitor which is manufactured in Monitor Factory or is
producedonthebasisofthisdata.
1.2ManufacturingType:SET
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2.Designation
2.1Theadjustmentisaccordingtothe orderwhichisdesignatedandwhich mustbefollowed,accordingtotheplanwhichcanbe
changedonlyonagreeing.
2.2.PowerAdjustment:FreeVoltage
2.3.MagneticFieldCondition:Nil.
2.4.InputsignalUnit:ProductSpecificationStandard
2.5.Reserveafteroperation:Above5Minutes(HeatRun)
Temperature:at25℃±5°C/Relativehumidity:65±10%/Inputvoltage:100~240V,50/60Hz
2.6.Adjustmentequipments:ColorAnalyzer(CA‐210orCA‐110),DDCAdjustmentJigequipment,
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3.MainPCBcheckprocess(SMT)
 *APC‐AfterManual‐Insult,executingAPC
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3.1ADCProcess
‐27UL550/27BL55U/27UL500doesn’tneedADCprocessbecauseithasonlydigitalinputlikeDisplayPort,HDMI.
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3.2MainPCBFunctiontest
‐Checkdisplay/audioaccordingtointerface
3.3WriteHDCP2.2Key
a.WriteHDCPKeyintoFlashmemorybyusingDDC2ABprotocol&HDCPAdjustmentJigequipment.
HDCP2.2WriteCommand:E9AddressHighAddressLowex)E90000
*Theremustbeinputsignal.NoinputsignalcausestheHDCPKeywritefail.
*HDCP1.4Keyisembeddedonscaler.
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