Samsung SP42W5HF Rear Projection TV Problem.

DejaVu · Joined: 02 Jul 2007 Posts: 90

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.

gary · Joined: 05 Apr 2005 Posts: 550 Location: MANCHESTER, uk

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.

DejaVu · Joined: 02 Jul 2007 Posts: 90

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.

DejaVu · Joined: 02 Jul 2007 Posts: 90

Would this be a good way to go?

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

gary · Joined: 05 Apr 2005 Posts: 550 Location: MANCHESTER, uk

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

DejaVu · Joined: 02 Jul 2007 Posts: 90

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

minnie · Joined: 18 Aug 2005 Posts: 2510 Location: Hell

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

DejaVu · Joined: 02 Jul 2007 Posts: 90

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...?

DejaVu · Joined: 02 Jul 2007 Posts: 90

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

DejaVu · Joined: 02 Jul 2007 Posts: 90

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?