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hi, If speakers are ok then the sound output ic of your tv is faulty. If you have basic knowledge in electronics then you can replace the ic. You can find the ic by following the wires from the speakers. It will end near the sound out put ic. The ic will be fitted on an aluminum heat sink. Note that number of that ic and get a new one from the nearest electronic spare part shop.For replacing the ic you need some tools like screwdriver de-soldering pump soldering iron, solder etc. All these thing will get from the spare part shop, if you don't have the same.Be sure to open the tv only after half an hour after dismantling the power because electrolytic capacitors inside it will store the power for some time. ok
You need to reset the tv to factory mode by pressing a code with the tv off,,,, mute--182--power and wait to see the menu appears on screen chose *reset to factory* press ok and wait until process done, them turn it on .
More likely its one of the Video output ICs which are located on the three CRT drive boards. I have seen that happen when one of the ICs fail they are TDA6111Q heres what they look like they are attached to the aluminum heat sink on the drive board
I you give me your complete STK number such as STK392-010 as an example I can tell you what you can upgrade to also it does not require any resistor change when you upgrade but send me your complete IC number that you have and I can tell you what to upgrade to thank you
I've tried to contact a service company recommended by Samsung based on my zip code. They haven't returned my calls yet. How much can I expect to pay for replacing one bulb in my rear projection TV? Thanks.
The symptoms you're describing appear to be convergence failure and probably only one of the convergence amps. That unit uses two STK392-040 IC's and it is HIGHLY recommended that you replace both - not just the one. The convergence amps are mounted to a large aluminum heat sink with a heat sink compound for the greatest heat dissipation. My personal experience with this particular model has been that replacing the IC's only restored normal operation in 9 out of 10 sets as opposed to having to replace any other corresponding resistors or other components. In laymen's terms it's probably only the convergence IC's that need replacing.
I strongly suggest that you not tackle this one by yourself unless your are fairly skilled at soldering. Too much heat on this multi-pin IC will destroy them and they're not cheap..
It's also a bit difficult getting the old ones out. If you don't do the job yourself find a good reapir shop and ask if they have the IC's in stock. If you're not sure where to find a reputable shop call NESDA, (National Electronic Service Dealers Assn.) They can refer you to a qualified member shop in your area...
If you do tackle this yourself, order only the Sanyo originals from places like B&D Electronics, Vance Baldwin, ACME or Samsung. And use a fairly good heat-sink compound...