I was workin on fixxin my convergence chips and ran into a problem when soldering.. is the a ground plane in the board? I also think i messed the board up, because i was tryin to get the chip soldered i seem to have a bridge between the the 2 pins where i think the ground plane is and i cant fix it. I could really use some help on this..thanks in advance!!!
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You would need to locate the chip, have some type of desoldering equipment, un solder all the pins, remove the chip, put some heat sink compound on the new chip, line up all the legs and install them through the board and solder each pin to the pc board.
This is symptom of convergence output chips failure in rear projection tv, replacement of convergence output chips will fix the problem. Chips/ IC replacement requires soldering work in circuit board, if you are not familiar with electronics stuff fixing an soldering work, call local tv repairman to help you. Thanks.
U have tools like philip screw drivers,long noise plier and a soldering iron,soldering wick or desoldering pump and solders?U Know how to do basic soldering?Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.U can go to You Tube type in convergence problems,will see a video by someone tutoring doing convergence board repair.
You still have bad grounds on the ICs. Or maybe the solder has fused another pin. If not bad grounds on the ICs you have missed them elsewhere...Really concentrate and look for these bad grounds and check your caps with a cap check. And power resistors too!!!!!
you can replace your the convergence chips on the convergence board. The board is to identify because it has a large heat sink. The convergence chips normally starts with STK... After you find the chip, you can buy online (ebay has a lot of listing) and costs around $10. If you know how to solder, it is very easy to do. I just replace the convergence chips on myPRO-610HD and it works perfectly.
check this out I have the same problem check your solder spot make sure the solder points are not touching one another, that could be one of the reason is doing this or just to make sure you can desolder the stk chips clean the holes where the pins go trough the board and power the tv with board and if the tv start fine if could be bad stk chips be very careful when desoldering or soldering good luck about another is not worth it they cost too much around 350-450
Set needs convergence ic's changed (STK392-110). Also look for resistors slightly discolored around STKs, usually low value like 1.5 ohm, 2.7 and 3.3 If you have an ohm meter and a soldering iron, solder and solder wick, you can attempt this yourself. Remove rear cover of set. Mark and unplug connectors from convergence board, including small jumpers that interconnect boards. Remove board, turn over and unsolder pins of conv. ic's using solder wick. Unscrew mounting screws and pull chips out. Careful, white heatsink compound is messy. Apply new compound to new chips if needed, making sure not to bend small pins. Slide chips in and screw in mounting screws. Flip board and solder in ic's making sure all pins came through. Check for small resistors around ic's being discolored,(usually 1.5 ohm) These are critical and a few tenths of an ohm change will cause extra alignments needed. Replug and secure board. Double check that all connectors are in place and power up unit. If you changed any mechanical adjustments to tubes or lenses, change them back now and try auto convergence. Service adjustment procedures are avail. online if needed. Good luck!
The convergence IC or in a sense ,amplifiers and the resistor are output resistors... if they are burning up the current going through them is spiking too high... TO me this is an indication that the "convegence yokes" are shorted. These are coils around the tubes that control convergence. I would suspect maybe that these are shorted to ground somehow. This is my first guess for this problem
There are kits available online, which include the chips and the soldering iron too.......Just a word of caution, convergence chip replaced is more difficult on Toshiba #1 the chips face other boards that must be remove first. the main one is the convergence generator (which the sheild is soldered in placed) Also the signal board (which is what everythings mounted to is very fragile)..............Good Luck