Installing STK392-570 IC's on a Mitsubishi WT-46809
I have a convergence problem on my WT-46809. A previous post informed me that the stk392-570 IC's should be installed on the center circuit board on large heat sinks to remedy this problem. I have inspected the tv to find none of the IC's are labeled STK392-570. How do I figure out which IC's to replace? How many should i order? Your help is greatly appreciated.
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Re: Installing STK392-570 IC's on a Mitsubishi WT-46809
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.
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Your convergence amp ICs have most likely failed and that will shut the TV down. You need to replace both convergence ICs they are both STK392-570 you can get replacement ICs with free instalation instructions at the following link. http://servicemanuals.vstore.ca/
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....