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51mp392h/17 Replacing stk392-120 Need Help Identifing RED    
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dssdgw



Joined: 11 Sep 2012
Posts: 1
Location: Colorado

PostPosted: Tue Sep 11, 2012 10:43 pm    Post subject: 51mp392h/17 Replacing stk392-120 Need Help Identifing RED Reply with quote

51mp392h/17 Replacing stk392-120 for red

Is it the 7044 or the 7045 on the panel. (per service manual layout} or say the closest to the from or back of tv. Only have a problem with red and only bought one. Now I don't know for sure which one is which. Rather only do it once.
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JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Wed Sep 12, 2012 2:14 pm    Post subject: Reply with quote

IF you only want to do it ONCE, you should replace BOTH ICs.

In theory ...

both were exposed to the same environmental factors as well as the same number of hours of use.
Most likely the heat sink compound dried out and failed on the bad one (the other one can't be far behind).

As far as which is which. You say you have service manual layout, so I'll presume you have the rest of the manual. Following the red convergence yokes wiring on the schematic should lead you to it.

Red Horizontal = 7044
Red Vertical = 7045
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