PHILIPS 50PFP5332D/37 Red & Green pixelation

[Sapulparon]

I'm having a problem with the color on this tv. There is an abundance of red & green pixels. It also has a vertical line on the right side of the screen It powers on with video & sound.I noticed 3 LED's on the logic board. Two of them were on (2000 & 2003), the third one (2002), flashes at all times the power is on. I found & replaced 2 bad caps (C8046 &C8051) on the power supply, pcb# LJ44-00144A. I just discovered a cap that looks questionable (C8080), & am going to replace it. I also found several diodes that appear to be bad, they have backward capacitance. They are D8009, 8014, 8016, 8019, 8024, 8034, & 8039. On the Y-SUS pcb# LJ41-04217A, i found a bad pico fuse #F5200, plus mosfets under the long heat sync that appeared to be shorted across the outer legs. They are D5001, 5003, 5005, & 5006. I am new to this, so any help would be appreciated. The photos will helpfully show what im getting on the screen.

[ratdude747]

Re: PHILIPS 50PFP5332D/37 Red & Green pixelation

Moved out of FAQ.

[gilly1984]

Re: PHILIPS 50PFP5332D/37 Red & Green pixelation

What caps did you replace them with?

Tell us the original caps specifications and the replacement caps specs.

Also, try a factory reset before anything else.

Should be a button combination on the tv/remote.

[tom66]

Re: PHILIPS 50PFP5332D/37 Red & Green pixelation

Looks like X-Main issue, but possibly also a Ve/Vset/Vscan or Yrr/Yfr timing issue, which can be fixed by doing some tweaks on the boards.

[Sapulparon]

Re: PHILIPS 50PFP5332D/37 Red & Green pixelation

Gilly 1984- The bad caps were 25v 680uf, i replaced them with 35v 680uf. I tried the factory reset & it didnt make any difference.

Tom66- I adjusted the vs from 189 up to the specified 205 & some black around the edge of the screen disappeared.After i changed the first two caps the vs voltage dropped, so i tried adjusting it again but couldnt get it to go above 200 with the pot turned all the way up. The va was ok, i didn't check the others. i am changing the other bad cap i discovered & will reinstall the boards & see if there is any change.

As far as the Y-SUS goes im questioning my troubleshooting on it. I'm confident that the pico fuse is bad because it is open. Likewise the diodes shouldn't have backward capacitance. But i'm not quite sure if i'm right on the mosfets. I noticed all of the ic's on the Y-buffer boards get hot enough that i can only touch them with my finger for a few seconds. It seems to me that they shouldn't be working if all of the components i listed on the Y-Sus arent working.

I will go through the "guide to troubleshooting common plasma tv problems" again to make sure im not missing something. I will also post a picture of the back of the tv & check & post the voltages on the psu. I will also disconnect each board again to see if there is any change

How do i check the X main to see if it has a problem? I obviously don't know much about what i'm doing, but i can follow instructions on how to troubleshoot so any help would be appreciated.