LG RT-29FC90RB, Service Manual, Page: 19 / 44

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Q503,504,505,CPT Board.
IC401S.
IC501S
pin 62,63,64 of IC501S.
Check Y,Cb,Cr signal
input from JA201.
Check / Replace
Check / Replace Check / Replace
pin25,26,27 of IC401S.
Check the waveform at
Check the waveform at
Check/Replace
Q301,302,303,304,305,306.
Check the waveform at pin78,80,82 of IC101S.
(From comp1,480i input)
Check the waveform at pin1,2,3 of IC401S.
(From comp1,480p/1080i input)
Check the waveform at pin7,8,9 of IC401S.
(From comp2,480p/1080i input)
YES
NO DVD/COMPONENT PICTURE(OPTION)
YES
NO
YES NO
YES
NO
IC501S,R540,R541. IC301, D301.
YES
Check the voltage
at pin 1,6 of IC301.
Check the waveform
at pin 12 of IC001.
Check the waveform
at pin 52,53 of IC501S.
Check / Replace
Check / Replace
IC201S,Q206.
Check /Replace
Check / Replace
FR359,FR360,D339,D349.
NO
pin121 of IC101.
Check the waveform at
YES
Q301.
Check /Replace
NO
pin111,112,113 of IC101.
Check the waveform at
YES
IC101.
Check /Replace
NO
IC501S.
Check /Replace