Help identifying shorted diode.

Donny2derby

Badcaps Veteran

Join Date: Apr 2023

Posts: 228

Country: Uk
#1

Help identifying shorted diode.

03-07-2024, 08:10 PM

Hi there all.

Troubleshooting an SMPS and I’ve found a SMD diode shorted in both directions. The trouble is it has no identification on it. So what do I replace it with and how do I tell where the anode and cathode is and how to mount the replacement?

It is diode D1 on the image.

Regards.

Gareth.

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stj

Great Sage 齊天大聖

Join Date: Dec 2009

Posts: 30977

Country: Albion
#2

03-07-2024, 11:33 PM

show the other side of the board and tell me the rating of the fuse,
it looks like a bridge rectifier circuit but i need to know the power.
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Donny2derby

Badcaps Veteran

Join Date: Apr 2023

Posts: 228

Country: Uk
#3

03-07-2024, 11:42 PM

It’s a 2Amp fuse mate.

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lotas

Badcaps Legend

Join Date: Jan 2016

Posts: 4540

Country: Russia
#4

03-08-2024, 03:40 AM

Remove the varnish from it with acetone, carefully scrape it off and the markings will be visible...
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stj

Great Sage 齊天大聖

Join Date: Dec 2009

Posts: 30977

Country: Albion
#5

03-08-2024, 07:08 AM

2 or 3a rectifiers - 1000v rated
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Donny2derby

Badcaps Veteran

Join Date: Apr 2023

Posts: 228

Country: Uk
#6

03-08-2024, 07:31 AM

Ok lads thanks. Will get it off later.
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Help identifying shorted diode.

Help identifying shorted diode.

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