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Philips 28CL6770/25Z PSU Trouble

 
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ms23



Joined: 01 Mar 2007
Posts: 1

PostPosted: Tue Apr 10, 2007 12:24 pm    Post subject: Philips 28CL6770/25Z PSU Trouble Reply with quote

This Philips Tv the switch mode transistor is short circuiting every time it is replaced, I have suspected the LOP transformer but the LOP transister checks out ok. any idears Sad
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tv.service



Joined: 30 Mar 2007
Posts: 19
Location: Sweden

PostPosted: Wed Apr 11, 2007 1:19 pm    Post subject: Reply with quote

Check for other components in the primary circuit that is short circuit.
When you take away the shorted transisitor you should measure high ohm between where collector and emitter was on the circuit board. Dont forgett to uncharge the big filter capacitor first.
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