LG PF-43A20, Service Manual

Page: 21 / 59

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Check the voltage
of CT75(+)
Check the 12V line
to be correct
Check/Replace
IC201
Check/Replace
ICT75, PT75
Check if the video
signal inputs at the
pin 40 of IC201.
Check the CVBS line
Check/Replace
ICT74.
Check the voltage of CT76(+)
Check if the video signal
inputs at pin 8 of ICT74.
Check I 2 C Bus lines
(SDA, SCL)
Check pins 15, 16, 17, 19
of ICT74.
Check/Replace
ICT76.
Abnormal
Abnormal
No
Abnormal
No
Yes
Yes
OK
Normal
Normal
12V
4.8
~
5.2V