Hisense LCD47P69P, LCD42P69P service manual Troubleshooting for Function Key

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LCD TV Service Manual

7.2 Troubleshooting for Function Key

Buttons does not work

YES

Check switches

NO

YES

Check key board

Replace tact switch

Replace Key BD

NO

Check Key BD cable

YES

Change Key BD

OK

NO

Replace main board

Hisense Confidential

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Contents Product Type：LCD42P69P、LCD47P69P Contents Precautions and notices Hisense Confidential Hisense Confidential Hisense Confidential Hisense Confidential Hisense Confidential Hisense Confidential Product Function Specifications Back Cabinet Specifications LCD Panel Spec LCD47P69P Hisense Confidential LCD42P69P： Factory OSD Menu White BalanceFactory Option Mode M is only used for factory production Hisense Confidential Software Upgrading Get ready for upgradingHisense Confidential Upgrading with the MtkTool Choose the current BaudRate Hisense Confidential Update with USB directly Hisense Confidential Troubleshooting Troubleshooting for Remote Control Troubleshooting for Function Key TV won’t Power On Troubleshooting for Audio Troubleshooting for TV/VGA/HDMI input Troubleshooting for YPbPr input Troubleshooting for Video/S-Video input Explode View Schematic circuit diagram Page Near IC MT8222P1V1 DDR1 Version PWCTL1 BL-ADJUSTBL-ON/OFF +5VTUNEROiri INT ICE U1RX U1TX Redp INT Vgagnd ORESET# Vgasog Oiri Grnp BlupGPIO11 Gpio RDQ0AV33DAC AV12DRGB DdrvAV12PLL AV12ARGBB AV33VGA GNDMEMDQ0 RDQS0 RDQS1RCAS# RRAS# RDQ0 Rcke MEMDQ1 RDQ1U0TX OSDA0 FRESET# SpisckU0RX OSCL0 U1RXHDMIPLUGPWR0 HDMI-L-HXCeca RX0C RX0CBCVBS1 CVBS2 AV1INCVBS1 CVBS3PB0IN SCT1G Y0IN SCT1RY0INGND PBR0INGNDCVBS5 SCT1AUROUTSCT1AV SCT1AURIN SCT1AULOUTSDAV50 OSCL0 SCLV50 IftunerCVBS0P +5VTUNER PWM1 TvainMUX1-L AudloutAudrout MUX1-L TvainLvdsvdd O2P Vbrout BL-ADJUST Ockp PWM0GND BL-ADJUST E0P E1P E2P Eckp E3P E4P GND Vbrout RESC1005L-HX O0P O1P