Question about Sony KP-46WT510 46" Rear Projection HDTV

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Skill Level HI there. I am a pretty handy guy, have done some soldering, but not much on modern PCBs. I have a few cheap soldering irons, and a "ColdHeat" soldering iron as well. I need to replace the convergence IC's on my Sony KP-46WT510. Is this a fool-hearty, or dangerous thing to do given my experience? I don't have a service manual. I can get the ICs no problem online. I don't want to mess anything up though. Thoughts? agscheidle at

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Its a fairly easy repair, However be careful where you get the ICs alot of places sell the cheap versions. You can get good quality ICs at the link I am posting I am one of their support techs plus they offer free tech support to help you. You will need to STK392-560 ICs for your model. The ICs arent that hard to solder getting them out is the hardest but if you grab some de-solder wick from radio shack its actauul alot easier. Heres a link where you can get quality ICs if youd like. They also have the service manual for your model if youd like one. They email the service manuals.

Posted on Apr 18, 2008

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Hi guys, my DJM500 has been a trusted friend over the years but unfortunately it's channel 1 (CD1/Line) only produces one output on the right, the other side is totally dead. Any ideas greatly appreciated.

Hi Andy
First check you cable/s, which Im sure you've done, but it could be a prob with the circuit board and or connector inside the unit, first if you can get your self some electronic circuit cleaner and Lubricant, open the unit if your handy with your hands and give it a blow out with air to get rid of the dust (not from the mouth, lol) but be gentle. Use the cleaner then the Lub, for moving parts. Now if it don't work with a good clean then it could be a split in some circuit solder, start from the insert that has the prob, if you can't use a soldering iron you may need to take it to a tech.

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Hi Alonso,
The F2 fuse has blown, You can buy them off ebay quite cheap and solder the new one back onto the board it is to the right of the game slot and under the battery terminal (P7). you will need a low voltage soldering iron, solder and good eye sight as these fuses are smaller than a flea in size to put on.
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They are quite easy once you have done a few.

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Got a question for the community, i am looking at buying a sodering iron, for working on cb radios and i have found one that seems to fit the bill and my pocket book, it is a 40watt pencil tip sodder

40 Watts is pretty powerful and will do what you need. However if it doesn't have any temperature control it may be too powerful. I use a 25 Watt electric soldering iron and it does everything I ever wanted in electronics. The danger of using an iron that is too hot is that it could heat components and solder beside where you want the heat.

If it's a gas operated soldering iron it's probably ok since ratings on gas irons are only estimates. Gas soldering irons are handy for working away from mains power, like in your car, however many of them tend to work great when new but after a few months they start to run out of gas very quickly probably possibly because they develop a leak. If you're only buying one I'd say get an electric 25 Watt one.

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Poping noise tv went off no picture.

Usually that popping sound is a capacitor blowing up. There are 2 ways to fix this. 1) replace the cap by itself or 2) replace the whole board with the bad cap. If you are handy with electronics and a soldering iron, replacing a cap is pretty cheap. The hard part is finding one. The local Shack may have one but probably not. If you are not comfortable taking the TV apart, then you need to find a tech to service your TV. Most techs are going to replace the whole board.

Apr 01, 2011 | Dynex 32 in. LCD Flat-Panel HDTV

1 Answer

Was told power unit had to be replaced how much will that cost?

If you are handy with a soldering iron you can do the repair yourself. 90% of power problems stem from cracked solder joints on power board & convergence board. All you need to do is heat up the existing solder and add a little fresh solder to the joint. I had a power problem on my Toshiba 50". Service guy told me a new board would be $165 + $150 for labor. I wasn't paying that so before trashing it I grabbed my soldering iron and resoldered every joint on the power board and convergence board. Bingo! No more power problem and it only cost me $25 in supplies.

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this yould need to be resoldered to the board and requires some soldering skill. Only attempt if you know what you are doing

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The tv keeps shutting off just after minutes of turning it on. We can wait about 5-10 min before turning it on again but then it only stays on for a few minutes.

This sounds like a heat related problem, which could be a faulty chip or a cold (bad) solder joint on one of the PCBs (printed circuit boards). Due to the lethal voltages present inside a CRT type television, it is strongly advised to have this repaired by a qualified technician. however, if you or someone you know is technically inclined, you can try to fix this yourself. Cold solder joints can often be spotted by visible cracks in the solder joints. a through inspection of all the boards could easily identify the problem which can be resolved with a quick tap with a soldering iron and perhaps a little extra solder added to the joint. if that yields nothing, another method is heat/cold stressing the boards while the TV is running. With the TV on, spray small areas of the PCBs with cold spray (or a can of compressed air duster turned upside down) until the tv shuts off. then heat the last sprayed part with a hot air gun (or a hair dryer) until you can get the problem to repeat regularly. inspect the area causing the problem and you will probably find the culprit.

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No vertical scan

yes, it is likely that it is dry jointed,as Premtech described, a ring like crack about the joint where it solders down to the printed circuit. They are generally pretty obvious. There is generally no flux on modern PCB's If you cannot solder,then this may pose a problem. What are your skills like with an iron in hand? :)

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1 Answer

Bad solder connections on the vertical ic


Cold solder is normally fix with re-application of heat using a soldering iron. This is a fairly straight forward job and should not be that difficult. Probably what would take more time is opening the back cover and exposing the solder side of the PCB. Most TV PCBs are slide in/out (it may held in place by screws or retaining clips or side locks. Additionally, some of the wires/connectors may restrict movement and therefore must be disconnected temporarily).

Good luck and kind regards.

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Repairing a broken green components board

First thing to do is let us have all the information that is printed on the broken board. we will first see if we can find one for you - most of these can be found for years after they have stopped making the set, and often another company will buy the license to carry on making them under a different name. Usually the boards bought seperately are relatively cheap. If we have no luck finding a replacement, then the repair may be possible depending on what the damaged part is - if you can remove the damaged board, take a couple of close up photographs of each side complete and really close up of the damaged area, post them back here and we can hopefully advise you if it can be done and how to do it. Almost certainly you will need a reasonable electronic soldering iron and possibly a solder removing suction plunger - these tools are cheap enough if you only need to use them a couple of times. The skill level required will depend on the exact nature of the damage, but hopefully we can talk you through the job. First give us the details of the broken board and take a few photos - then we can see what we can do. waiting for your reply :)

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