Re: Lg 42pj550

Ok here's the measured voltages:-
Va = 58.9v
Vs = 202v
M5v = 5.0
17v = 16.7
STDBY5 = 5.0
+5VF varies between 8 and 12v
+15F varies between 17 and 25v
SUSON varies between 3.6 and 6.5v
These variations occur when the picture brightness alters. ( I had scarted the
picture out to another set just to check the video processing)
I also noticed that where there are high voltage warnings on the 5 screw connections between the Y board and the buffer board there was only 45v on
the bottom...

Re: Lg 42pj550

Here's the pics this time!...

Re: Lg 42pj550

No still no raster or test pattern. Here's some pics of the boards.

Re: Lg 42pj550

The manual says to look for a waveform on P1004 but I can't see this test point.

Turns on fine with good sound but no picture. All voltages are present and
correct and it seems that the Y and Z boards are doing their job because
the heatsinks are getting warm. The curious thing is that there's a LED flashing
on the LVDS board with a sequence of two short flashes, then a longer one, then another short one, then a very long one. This keeps on repeating and it
looks like a fault code. Any ideas?

Thanks
John

I've got a LG 42LG5010 tv here and I'm in the middle of replacing all the electrolytics on the psu board EAY4050520. I took them all out and wrote down all the circuit reference numbers and corresponding values. I then ordered those
which I didn't have in stock but when I was ready to put them all back in I found that the paper had disappeared and now I have bundle of new caps and
don't know in which position to fit them. Does anybody have a circuit diagam
for the panel or maybe one of you out there has a similar one and could have a
look at it and tell me where each...