Read LG 42LH200H (CHASSIS:LD91Y) Service Manual online
Making
Revision
2009. 2 . 1
LCD TV
Symptom
IR Out Problem
Check the RS-232C Pin4 / HDMI Pin14
Check the IR waveform
of R1300
YES
NO
Replace it
Check the IR waveform
of IC1100_3,6,11Pin
YES
NO
Replace the Preamp of IR ass’y.
NO
Re-soldering or replace
the defect part
22~42LH200H
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