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Power supply 220VAC/DC 0-30V/0- 1A: not working ok anymore

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Power supply 220VAC/DC 0-30V/0- 1A: not working ok anymore

Postby Pborsen » Sat Feb 13, 2016 10:44 am

Hi Everyone
I build this power supply in the 80's during my education at an Electronic engineering school.
I designed it to be adjusted from 0 to 30vDC and to adjust the amps limit between 0 and 1 A.
Recently when trying to use it, I can not adjust the tension with the potentiometer anymore. When rotating the potentiometer, it moves from 0V to 30V and can't manage to adjust to another voltage.
I have not run into electronics for years now but can still repair, change circuits,...when I know what to change.
I don't have the diagram any more but can sent pictures of the board.
Any idea where the problem can be?
Thanks in advance.
Pborsen
 
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Re: Power supply 220VAC/DC 0-30V/0- 1A: not working ok anymo

Postby pebe » Sat Feb 13, 2016 5:59 pm

Can't make any suggestions without seeing the circuit, but a photo may be useful.
pebe
 
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Joined: Tue Dec 09, 2003 11:12 pm
Location: Ellon, Scotland

Re: Power supply 220VAC/DC 0-30V/0- 1A: not working ok anymo

Postby pebe » Mon Feb 15, 2016 2:31 pm

Pborsen,
If you are trying to upload a photo, please bear with me. There is a fault with the site at the moment that we are trying to get fixed.

pebe, moderator
pebe
 
Posts: 1058
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Location: Ellon, Scotland

Re: Power supply 220VAC/DC 0-30V/0- 1A: not working ok anymo

Postby PradeepKumar » Thu May 26, 2016 6:18 am

Hey kindly post the circuit diagram. Only then it will be helpful to make replies.
PradeepKumar
 
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Location: Bangalore


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