Small Ali express Oled Buck Converter no Power output.

gersrt

Member

Join Date: Jan 2021

Posts: 21

Country: Ireland
#1

Small Ali express Oled Buck Converter no Power output.

12-31-2021, 05:31 PM

Just learning electronics so hoping someone can give me some help to troubleshoot this little buck convertor. I've attached photos.

I was putting it inside a housing that I had made and unfortunately something shorted and I got the dreaded burning smell. Any way device and screen still turning on and recognising the Voltage input. Unfortunately their is no voltage output and keeps tripping over current protection when I turn on. Obviously something is blown. Could someone guide me where I should start looking for faulty components. Thanks in advance.
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mikey5791

Badcaps Veteran

Join Date: Dec 2014

Posts: 515

Country: Malaysia
#2

01-01-2022, 10:13 PM

Re: Small Ali express Oled Buck Converter no Power output.

Hi gersrt,
Something is shorted some where. Is your new housing a non conductive material?
I saw one of the diode rectifier (2060ct) had bad solder. Have you checked if those 2 diode rectifier is not shorted or open?
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stj

Great Sage 齊天大聖

Join Date: Dec 2009

Posts: 31017

Country: Albion
#3

01-01-2022, 11:33 PM

Re: Small Ali express Oled Buck Converter no Power output.

one of the inductors is broken
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Small Ali express Oled Buck Converter no Power output.

Small Ali express Oled Buck Converter no Power output.

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