Question about Philips Magnavox 51MP392H Rear Projection Television

Blue Convergance Problem?

Okay this is the porblem. Set it about 3 yr.s old, turned it on the other night and there was blue shadows on the screen. Tried to adjust the convergance manually, but the little plus's would not move. The red one would. Anyway it sounded exactly like a problem posted by Cfgusmer1. So I tried the solution posted by leslake. I replaced the IC's. I ordered 2 of the STK392-110's. But when I got the set apart I discovered my set had 2 STK392-120's. I went ahead and replaced them with the 110's. I was very careful not to damage anything else and tagged all the connectors during removal. So I put it back together and fired it up. I got a faint picture that turned to bluish green and then went out completely after about 4 seconds. Does this everytime I power it up. Sometimes though I don't get the faint picture, just the colors sometimes with squiggly lines. I guess what I would like to know is can you use 110's instead of 120's? Because I don't know if its the wrong parts or maybe I didn't get something hooked back up correctly. Anyway now I can't watch the set at all. Would appreciate any advice.

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Robert Johnson

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395 Answers

Stk392-110 and the 120's are similar but the the 120's handle a higher current so when you replaced them with the lesser the amps not only blew again but the resistors that support the power handling also opened. this is a repair that a tech should handle.

Posted on Sep 22, 2007

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