Philips LCD 42" TV Help needed

[hucklebuck73]

Hello all, I am new to this forum, and was turned this way from having issues with this dang TV at work. I have read some of the forums and it appears as if alot of these TV's have the same issues, heres the one I am trying to repair.

Philips 42" LCD M#-42PFL3603D/27, S#-YA1C0815019043
The power board # is 2300KEG031A/F

The tv was shutting itself off after a couple of hours on, (so a friend sent me here cause he had the same issue.) I replaced 6 caps overall, three were buldging and leaking, the other three just cause they were close. So anyways turned on the tv left it on the floor leaning and it worked for about 6 hours. As soon as we put it on the wall to stay it only lasted two hours then starting shutting off all over again.
I took off the back and all caps look good, but it was damn hot. Could it be that it is now just getting to hot?? Or is it something else?? BTW the tv was bought for work and has lasted three years on the same wall as i just took it off of. Its really frustrating to say the least after replacing caps. Any help would be great...Thank you.

[tom66]

Re: Philips LCD 42" TV Help needed

What brand and series of capacitors did you use as replacements?

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

yes sir,

2x 35v 2200uf (C236/C235) nichicon
1x 35v 470uf (C233) nichicon
1x 50v 680uf (C229) nichicon

I only replaced 4 sorry bout that when I said 6. I bought 6 just in case the other two went south. I have always gone to this electronics supply place when repairing arcade games and tubes so I do trust them and there brands.

[tom66]

Re: Philips LCD 42" TV Help needed

Nichicon are good caps but along them there will be a two letter code such as PM, PW, HD, etc. usually with (M) next to it. It codes for the particular series that Nichicon makes. It's possible you've installed non-low ESR caps and the PSU isn't happy.

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

Ok i'll look real quick also it appears as if one of my solder joints has come loose from the board. One leg of the cap seems to be loose from the hole that it goes through. I am trying to resolder it to the board but it doesnt seem to be working am i doing this wrong?? I'll let ya know about the codes...

Its not bad loose but barely

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

ok the 2x 35v 2200uf are HE(M)
the 35v 470uf is VZ(M)
the 50v 680uf is PW(M)

[tom66]

Re: Philips LCD 42" TV Help needed

All are excellent capacitors.

Time to look elsewhere - try and look for dry or dull solder joints and retouch them. Try tapping on the board with an insulated screwdriver while it is running and see if you can get it to cut out.

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

Ok I can try that for sure. Did you happen to read above two posts about the one solder joint that was loose, and is there a trick to getting it soldered back good to the board? I'm at work and have to go do something for a bit but I'll be back retouching solder joints after that. Also trying to short it out sortof with the screwdriver.

[tom66]

Re: Philips LCD 42" TV Help needed

Cold solder joints are relatively common; all you need to do is apply a little new solder to them and flow them nicely so they are making good contact.

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

ok i'll try that, I am talkign about the lil metel circle (i think it is) around the hole were you slide the cap leg through. that has come loose so when you slightly move the cap you can see it not making contact with the board. I hope i am describing it right..

[tom66]

Re: Philips LCD 42" TV Help needed

Yeah, that's definitely a problem (lifted pad is what it is called) - what you need to do is find a place that cap used to connect to and solder to that instead… Post a picture if you're having difficulty locating one. Everyone rips a pad or two on their first repair, you get better with experience and find you won't have to repair them any more. A dodgy pad connection could be causing your problem.

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

Thanks, I'll be looking at solder joints all around anyways. So will the solder take to the board hole? if the pad is missing.

[Mr Bill]

Re: Philips LCD 42" TV Help needed

No. You'll have to run a jump wire to another point or you can scrape the board to expose the copper and solder to that if you have the room. Post a picture and we can give you better options.

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

I will for sure but not tonight. I tried all I can while on duty here. I resoldered that pad as best as I can for now, and are trying the TV now. Thanks to everyone so far that has helped. I'll post a pic as soon as I can but for tonight I think i'm done.


Thanks again this is a great forum with loads of advise and threads...

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

[hucklebuck73]

Re: Philips LCD 42" TV Help needed

I hope these pix are ok to view. You can see by the last pic what I was talking about. It appears that half of the solder pad is missing for some reason. The one near towards the bottom of the board. Any help on how to repair this would be great. It still stays on for a bit then once again shuts off.

[tibimakai]

Re: Philips LCD 42" TV Help needed

I don't see the pictures.
Make sure that they are maximum 2000x1500, use Paint to resize and use Manage attachments.