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Old 02-25-2012, 04:42 PM   #3
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Join Date: Aug 2011
Posts: 8
Default Re: Circuit voltage measurement problem.

Originally Posted by retiredcaps View Post
When measuring voltage at a bridge rectifier, you want to measure DC voltage.

Remember what a bridge rectifier is supposed to do.
Thank a lot for reply.

I measured the voltage at pin 4 which supposed to be output pin i think and pin 1 and both show 139 to 137 V variation untill TV starts the blinking light thing which I think is protection mode of some kind as relay clicks and voltage in rectifyer drops.

If input is 232 V AC and output 137 -139 V DC does it mean rectifyer is done for? Or I should look around for defective components around it?

Still curious why does AC1 reads normal 230V and the parallel to it reads 0 V can it be the cause of low output of rectifier?
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