toshiba tp48d90 convergence problem

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Jack s
toshiba tp48d90 convergence problem

I recently obtained a Toshiba tp48d90 RP with the convergence chips blown (stk392-020).               I replaced them with OEM chips (stk392-040) and I still have the same problem. One of the pico fuses was blown and I replaced that one as well. All of the resistors test within tolerences. What can the problem be?

Thanks

Jack s

 

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