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Samsung SP42W5HF Rear Projection TV Problem.
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Sun Apr 06, 2008 1:11 pm    Post subject: Samsung SP42W5HF Rear Projection TV Problem. Reply with quote

Here we go again! Wink

Already searched the forums and found that this looks to be the usual IC problem (STK392-040), it's possibly a convergence problem.

I'm not 100% sure and will take a picture of the fault once it's bought over to mine and post it for confirmation from a guru, just to be certain.

I've 'almost' repaired a similar model in the past (here), but gave up in the end after it went 'pear shaped'. A friend of mine has said I can have his one to try again! LOL

Any help is of course always appreciated.
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Mon Apr 07, 2008 12:24 pm    Post subject: Reply with quote

IF IT IS A CONVERGENCE PROBLEM UNDER NO CIRCUMSTANCE FIT ANYTHING OTHER THAN SAMSUNG SOURCED ICS, THESE SETS ARE UNBELIEVABLY PARTICULAR ABOUT THE STKS FITTED. COPIES MAY GIVE RISE TO FURTHER FAULTS AND IF THEY DO WORK AT FIRST WILL PROBABLY FAIL AGAIN AFTER A VERY SHORT TIME.
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Mon Apr 07, 2008 3:39 pm    Post subject: Reply with quote

Can you recommend anywhere to get a resonably priced STK392-040 IC's specific for Samsung Televisions?

I've noticed that 'copies' can be gotten for around $14 for the pair. I've heard that I'm looking at somewhere around $80 for the pair for Samsung models... Is that correct, if so, where should I start looking.

I'm in the UK BTW, should it make any difference.
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Mon Apr 07, 2008 3:46 pm    Post subject: Reply with quote

Would this be a good way to go?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260225273610
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Wed Apr 09, 2008 8:22 am    Post subject: Reply with quote

this is where i get them from http://www.chsinteractive.co.uk/
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Thu Apr 10, 2008 2:08 pm    Post subject: Reply with quote

Got the back off it today.

Looks a little more involved than my last set. Gotta pul quite a bit out to get to them.

I think that link is the first time I've seen STK392-040 specific for a model. I will go with them though I think.

Seems quite a lot more expensive, but going on your recommendation and I gather they've worked well for you in the past.

Thanks for the heads up. I'll report back once complete! Wink
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Fri Apr 11, 2008 11:14 pm    Post subject: Reply with quote

Don't forget to check the 3.9 ohm resistors and pico fuses.
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Thu Apr 17, 2008 1:26 pm    Post subject: Reply with quote

Any way you could give me an idea where they are and how to test them minnie?

Have the service manual if it makes life easier...?
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Thu Apr 17, 2008 1:40 pm    Post subject: Reply with quote

Would I be right in saying it looks like this -

And that I need to get a multimeter either side to make sure it is 3.9 still.

Sorry for my perhaps silly question, but am in the proces of learning still! Wink
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DejaVu



Joined: 02 Jul 2007
Posts: 93

PostPosted: Fri Apr 18, 2008 10:49 am    Post subject: Reply with quote

All in bits at the moment soldering the STK392-040's to the board.

Which resistors are the 3.9 ones to check before I put it all back together?

Anyone?
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