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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Mitsubishi WS-65903 convergence problem
The TV is a Mitsubishi 65" wide screen HDTV Projection set. Model
WS-65903. It's about 5 years old. The original problem was a blue shadow about 4 inches to the right. Seemed like a typical convergence problem as we'd done a couple of very similar models recently. Never a call back. Upon inspection of the Power Supply /Convergence board, there were the typical broken solder joints on the two STK392-040 I.C. modules which control the convergence correction. I ordered replacements put them in and put the chassis back in the set. The picture looked perfect About a week later I got a call back. Same problem with the blue. Now I don't see anything apparently wrong in the circuit, but I don't just want to replace the modules, because I'm afraid they'll fail again. Looking for a schematic , service manual etc. Also, if anyone has any suggestions or experience with this set I'd appreciate any help. Regards, Larry you can email me at |
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Get the STK,s from Mitz as its very possible you
replaced the STK,s with cheap Chinese ones.!! kip "L" wrote in message ... The TV is a Mitsubishi 65" wide screen HDTV Projection set. Model WS-65903. It's about 5 years old. The original problem was a blue shadow about 4 inches to the right. Seemed like a typical convergence problem as we'd done a couple of very similar models recently. Never a call back. Upon inspection of the Power Supply /Convergence board, there were the typical broken solder joints on the two STK392-040 I.C. modules which control the convergence correction. I ordered replacements put them in and put the chassis back in the set. The picture looked perfect About a week later I got a call back. Same problem with the blue. Now I don't see anything apparently wrong in the circuit, but I don't just want to replace the modules, because I'm afraid they'll fail again. Looking for a schematic , service manual etc. Also, if anyone has any suggestions or experience with this set I'd appreciate any help. Regards, Larry you can email me at |
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