LG 26LH2000 Service Manual
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Check The SpeakerCheck Speaker Cable YES Check P700 Cable YES NO Replace MAIN B’D IC 701 YES MAIN B’D L705 Pin #1 L704 Pin #2 PWM Signal ? Replace Speaker NO Replace Speaker Cable NO CHECK MAIN B’D JK700 or JK701 YES Replace MAIN B’D JK700 or JK701 NO _ If headphone is connected, Speaker sound doesn’t work. Replace MAIN B’D IC803 NO YES MAIN B’D L700 = 1.8VMAIN B’D Check R720, R721, R722 Signal YES Replace MAIN B’D IC100 NO Replace MAIN B’D IC701 NO Making Revision 2009. 2 . 1 18/34 LCD TV Symptom All Source no Audio Problem 26~42LH2000 32~47LH3000/LH4000
Digital TV Video OK ? YES Replace MAIN B’D IC 100 Making Revision 2009. 2 . 1 19/34 LCD TV Symptom Digital TV No Audio Problem 26~42LH2000 32~47LH3000/LH4000
MAIN B’D TU1200 Pin #17 Signal (SIF) Replace MAIN B’D TU1200 NO Analog TV Video OK ? YES Check MAIN B’D C231 Signal (SIF) NO Replace MAIN B’D IC100 YES Making Revision 2009. 2 . 1 20/34 LCD TV Symptom Analog TV No Audio Problem 26~42LH2000 32~47LH3000/LH4000
Check the SCART Cable YES Check MAIN B’D C229, C230 MAIN B’D C229 (Right Sound) C230 (Left Sound) signal ? YES NO Replace MAIN B’D IC 100 AV1 Video OK ? YES Check MAIN B’D JK1100 Replace MAIN B’D JK1100 NO YES Making Revision 2009. 2 . 1 21/34 LCD TV Symptom AV1 No Audio Problem 26~42LH2000 32~47LH3000/LH4000
Check the SCART Cable YES Check MAIN B’D C2008, C2009 MAIN B’D C2008 (Right Sound) C2009 (Left Sound) signal ? YES NO Replace MAIN B’D IC 100 AV2 Video OK ? YES Check MAIN B’D JK1101 Replace MAIN B’D JK1101 NO YES Making Revision 2009. 2 . 1 22/34 LCD TV Symptom AV2 No Audio Problem 26~42LH2000 32~47LH3000/LH4000
Check the CVBS Cable YES Check MAIN B’D C2011, C2012 MAIN B’D C2011 (Right Sound) C2012 (Left Sound) signal ? YES NO Replace MAIN B’D IC 100 AV3 Video OK ? YES Check MAIN B’D JK402 Replace MAIN B’D JK402 NO YES Making Revision 2009. 2 . 1 23/34 LCD TV Symptom AV3 No Audio Problem 26~42LH2000 32~47LH3000/LH4000
Check the CVBS Cable YES Check MAIN B’D C2013, C2014 MAIN B’D C2013 (Right Sound) C2014 (Left Sound) signal ? YES NO Replace MAIN B’D IC 100 Component Video OK ? YES Check MAIN B’D JK400 Replace MAIN B’D JK400 NO YES Making Revision 2009. 2 . 1 24/34 LCD TV Symptom Component No Audio Problem 26~42LH2000 32~47LH3000/LH4000
Check the PC Audio Cable YES Check MAIN B’D C2015, C2016 MAIN B’D C2015 (Right Sound) C2016 (Left Sound) signal ? YES NO Replace MAIN B’D IC 100 RGB Video OK ? YES Check MAIN B’D JK401 Replace MAIN B’D JK401 NO YES Making Revision 2009. 2 . 1 25/34 LCD TV Symptom RGB, HDMI-PC No Audio Problem 26~42LH2000 32~47LH3000/LH4000
HDMI Video OK ? YES Check the ADJUST MENU EDID OK ? YES Download EDID (Refer to Adjustment Spec) NO Check the HDMI Cable Replace MAIN B’D IC100 YES Making Revision 2009. 2 . 1 26/34 LCD TV Symptom HDMI-DTV No Audio Problem 26~42LH2000 32~47LH3000/LH4000
Check the SCART Cable YES Replace MAIN B’D IC1103 MAIN B’D R239 (Right Sound) R240 (Left Sound) signal ? NO YES Replace MAIN B’D IC 100 Analog TV Audio OK YES Check MAIN B’D JK1100 Replace MAIN B’D JK1100 NO YES Check the Trouble Shooting Guide Analog TV No video NO Making Revision 2009. 2 . 1 27/34 LCD TV Symptom AV1 No Audio Out Problem 26~42LH2000 32~47LH3000/LH4000