Trying to get board out to change convergance IC's and I dont know how to get the white connectors loose along the edge of the board there are three on one side and two on the other that connect the boards together. They have aprox 20 wires in them and they are flat with some white insulation in the middle. Thank you
I just did this repair last week and here's what I did... I took a flat bladed screwdriver and CAREFULLY twisted it underneath each end of the connectors EQUALLY to be sure they raised out without damage.
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the vertical deflection IC if defective will cause the protection circut not to let the tv power up ,it has a thermal protection circut as well here is the vertical deflection IC # la78045 and here is a link for the NTE equivalent part and specifications and pin layout http://www.nteinc.com/specs/7200to7299/pdf/nte7209.pdf WARNING if you heat up any component to long or with to hot of an iron you can dammage the component and or the thermal protection circut but I believe you will also have to replace the flyback (high voltage transformer ) with wire giving to much voltage
Whoever told you that the WT46809 took two STK392-570 Ic for convergence amps were absolutely - 100% correct... The amps are located at position number Ic8c01 & Ic8c02 on the board. Very difficult to miss too they are about half the size of a pack of cigarettes and 1/4 as thick. They are Mitsubishi part number 267p150010 and after replacing them you want to also check all the low ohm resistors in that circuit for the yoke return.
If you order them don't get them from ebay or some other less than ignorant place, our industry is loaded with chineese knock-offs that would last tem minutes in your set before failing again... Personally I'd order them from Acme Enterprises out of Florida, 800-575-9833 and know that they were Sanyo originals that way.
BTW: If you replace these yourself make sure to use a generous portion of heat sink compound on the new installs for heat dissipation.
Fuses and IC's are soldered in on large PC board in center of chassis.... Your model is a tight fit that is usually repaired by chassis pull first, then board repair, normally by a skilled Mits tech........
On this set if it still turns on and you see a picture then the only thing you will need to replace are the ICs.
Use heat sink compound on the new ICs before replacing the old ones. If you have a parts supplier in your town, then, use them. If not, Radio Shack will do in a pinch.
The old ones may be stuck to the heat sink, so, a flat blade screwdriver may help with that.
Use a clean soldering iron and good solder wick.
I have the MITSUBISHI WT-46809 46" HDTV CONVERGENCE IC PROBLEM as well. I just ordered the STK392-570 IC for 7 bucks and I am going to attempt to switch them both out (two of them). I am getting the overstated "bow tie", "RBG separation" issue that you are talking about. I am going to attempt to de-solder the intergrated chips and put new ones in. I figure it is worth the shot, insted of paying 350-650 bucks to have some **** with average skills do the same I figure it is better to have this **** with average skills do it and keep the cash.
I will let you know how it goes....