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Author Topic: Dual power supply  (Read 650 times)

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Offline funky2xTopic starter

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Dual power supply
« on: December 24, 2023, 11:12:47 pm »
Unaohm 40+40 volt 2.5 amp.

The problem started when the fuse blown due to wrong wiring. Later, capacitors leaked and no voltage at the output. I replaced all the capacitors but unfortunately, only one channel is working now. The slave one.
Any advice on identifying and fixing the problem would be greatly appreciated.
« Last Edit: December 24, 2023, 11:17:55 pm by funky2x »
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Offline dobsonr741

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Re: Dual power supply
« Reply #1 on: December 24, 2023, 11:30:04 pm »
Seems to have two identical sides. Check on the voltage of C1, C2, C5 on each side. Then work forward. Check on the op-amp output.
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Offline coppercone2

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Re: Dual power supply
« Reply #2 on: December 25, 2023, 07:40:28 am »
also clean the thing, you have no idea what leaked caps ended up doing or where it got into. That thing looks dirty.
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Offline Swake

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Re: Dual power supply
« Reply #3 on: December 25, 2023, 01:22:20 pm »
Indeed, better to clean it out.

Is it this one?
UNAOHM ST-40-2500-A 2X0-40V,2.5A LABORATORY POWER SUPPLY 1982 SCH
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When it fits stop using the hammer
 
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