Question about Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television

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No Picture Had a tech out this morning to replace the convergence IC's. Now that he has replaced them, the tv has no picture at all. He seemed baffled and said he was going to get his schematic. Never showed back up. Anyone have any ideas on why there may be no pic?

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Re: No Picture

Hi. Before the tech touched the set was there any sort of picture ? If there was then it could be a problem to put right as he may have now put a man made fault on your set They can be are real difficult to sort out. Did you pay him for what he did ? If you did start hounding him as to when he will be back to sort it out. Dont let it rest.

Posted on Sep 30, 2007

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the problem on your tv is the convergence ic , this parts need to be replace is not an easy fix , you need to hire a tv tech normal cost about $200

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I am not sure what it is called but in the middle of the screen the picture is great but the further you go left or right the colors are not alligned they start off by only alittle bit but get...

You are suffering from a convergence problem. In this case I recommend you see a TV tech. To pull the convergence board is a real chore. Your convergence board will have too many bad grounds to even begin to count. You may not have to replace the convergence IC. The IC will be of a STK-393-110. In many cases this IC will be replaced by an after market part. You will have to check and replace resistors of a 2 watt value of about 3.9 ohms. In good faith, the TV man will replace this convergence IC ,as to try to correct the problem the first time. Good advice for the ,do it your selfer. Take this note to a TV tech. Some knowledge could save you a few bucks. Thanks for asking and show all hands of support!

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yes thats a good price to replace a bad red picture tube and at the same time the convergence ic , this is for the doble picture and lines

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That symptoms are due to failure of convergence out ICs in your TV that will be replaced to get correct converge picture on front screen.

There are 2 big black IC mounted on big aluminum heat sink and number would be written on as STKxxx, these 2 ICs will be replaced.

If you want to repair TV by yourself then confirm model number of TV to provide you more info or call local tech to replace said ICs.

Dec 21, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

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Lots of Blue shadows off to side. concaved picture almost

HI, this is a failed convergence chip that is located on the convergence board. it will need to be replace ASAP. you can just replace the chip or , you can order a new board.

Replacing the chip can be a rough job if you don't have tech experience. if you are a fluid tech and you can solder and know your way around a circuit board, just replacing the chip will cost less. if you are not an experienced TV tech, i recommend a service call to the nearest TV tech to replace the convergence board.

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Hi, you need to replace your convergence IC`s, if your not real proficient at soldering it`s probably better to call the tv tech in for this one, video-tek

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No picture, but red light on front comes on

If one your convergence IC's is bad then you will still see a picture but the colors will not line up, especially around the edges. I have never seen a Toshiba projection set completely lose the picture because of a defective convergence IC. If your vertical output IC has failed or cracked loose then that is exactly what you will see - no picture! The vertical output IC is usually on the same board as the convergence outputs which explains why it worked last time, even if the tech was not 100 percent accurate in knowing exactly what was wrong - he just changed everything. Resolder that vertical output IC and make sure it is getting power. If you still have no picture after that then have a qualified tech look at the set.

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have the tech look at your tv once again your problem is in the video section.the ic that controls that and the related circuit are not working parts needs to be replaced.good luck.

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