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 Posted: Sat Dec 24, 2005 7:25 am Post subject: Sony KPS4112 Rear Projection Dead |
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The chopper transistor (BUZ91A) in the power supply board failed short circuit. The main's fuse also blows. Has anyone got any ideas what to look for next? I have replaced R613 which was found to be open circuit, at the same time I replaced TDA4605-3 and the opto-coupler. However, the transistor BUZ91A still fails even after replacing all the above mentioned components. I have no circuit to work to, so please help if anyone got any idea what to look for next.
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