Question about Televison & Video
I am not sure which brand or model television you have but your symptom sounds like at least one damaged convergence IC. In your post you say that the ACS has been replaced, I am not sure what the ACS is but if it is the convergence board, then you may have some fuses that are not supplying the voltage to the convergence IC’s, otherwise the following may help.
If you have a good low wattage soldering iron ~ 45W (available at radio shack) you can perform the repair yourself, and this will most likely take care of the entire issue.
I like to remove the board that the IC’s are on so that I can unsolder the connections and clean then up using solder wick (this is also available from radio shack). Removing the board is not a real issue as the connectors are all labeled with an alpha number, so that you can connect them back real easy. There are three in the middle towards the front that I like to mark with a sharpie as they are the red green and blue convergence coil connections (they are all the same size in a row). Just mark them with slashes, like I, II, III, or something like that. If you mix them up it is not a big issue, you can test swapping them around until the picture lines up.
Please be sure to remove the entire white heat sink compound on the heat sink and apply an even coating over the back of the new IC’s. You should also bolt them down before you solder them in so that you have them at the correct height.
There are two very large IC’s that control the convergence in a big screen set. They are secured to a very large aluminum heat sink.
The IC’s are large and black, you cannot miss them. They will usually have an STKXXX-XXX number on them.
This repair from a good technician will normally run from $250.00 - $300.00, and sometimes more depending on your area. You may want to contact a service center as the voltage in the set can be very dangerous.
There are several schools of thought on the replacement of parts and I firmly believe that you get what you pay for, so don’t buy the cheapest IC’s that you can find. One company I worked for tried this and it only caused more work for the technicians, as we had to replace them with the more expensive ones in the end. I would think that you should be able to find these for around $60.00 each. If you can find the exact part, or Sanyo (Sanyo made these for most brands), even though the numbers on the front are the same, and they look exactly like the $10.00 ones, they are better and more reliable.
I usually order my parts from Andrews Electronics in California; they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.
You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.
I hope this information allows you to resolve this issue.
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Posted on Aug 01, 2009
If you do soldering on TV ICs to resolve this issue replace 120k resistor on the blue video output module. Resistor is located next to the blue video output transistor (has heat sink). If you replace it with a 1/2 watt carbon type, it will probably never happen again. I always replace the same resistor on the red and green video boards at the same time.
On the blue crt below the glass tube you will fine two metal tabs. By sliding the metal tabs (they move in a circular pattern) you can re-center the crt with a little experimentation. Then follow the convergence procedure to complete the repair. When you resiliconed the anode lead you may have moved the metal tabs from their previous position.
for more information, please visit: http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html
SHOULD THE SOLUTION PROVIDED IS NOT POSSIBLE TO BE DONE, please consult a TV repair shop and have the set repaired.
Hope this helps,
Posted on Jul 30, 2009
I am not sure if you meant that you replaced the Convergence STK processor... if not you may check on them and the soldering. They are usually found at the back and has heat sinks on them.
Otherwise, you may check on the circuit protectors under the heat sink as well. There should be a fuse on them and the usual color that they have is yellow that looks like resistors. Check if they might be blown or may have just gotten loose in their connections.
Posted on Jul 30, 2009
Please intimate model and brand of your TV to look into schematics, if available, to find out helpful info.
Posted on Jul 29, 2009
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Posted on Jan 02, 2017
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