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Kelvin Katungi



Joined: 12 May 2012
Posts: 9
Location: Uganda

PostPosted: Sat Jun 16, 2012 2:53 pm    Post subject: Power supply Reply with quote

I was measuring AC across a certain diode in a well working power supply circuit and the fuse blew, what could I have done wrong?
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JTS1957



Joined: 21 Jan 2009
Posts: 2324
Location: Far, Far Away

PostPosted: Sat Jun 16, 2012 8:52 pm    Post subject: Reply with quote

Meter defective?
Meter set to wrong function?
Meter probe connected to more than one point causing a short?
You got up?
Kelvin Katungi



Joined: 12 May 2012
Posts: 9
Location: Uganda

PostPosted: Sat Jun 16, 2012 11:07 pm    Post subject: Reply with quote

@JTS1957, my meter was set to 200 -750 AC voltage range and the black probe was connected to cathode and red to anode. More so i had already measured two other diodes whose cathodes were connected to the positive of the filter capacitor.
kuhurdler



Joined: 28 Dec 2006
Posts: 2855
Location: Overland Park, KS

PostPosted: Wed Jun 27, 2012 9:17 am    Post subject: Reply with quote

could your probes have shorted a connection with another trace?
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