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Owon oscilloscope power supply schema or part info?

I'm repairing owon pds5022 where the power supply is bad. The U3 chip is burn beyond any real markings. It is 5 pin smd, SOT-25 package. I've drawn the schema on paper and it looks like pin3 is input ( fed via resistor), pin2 is ground, pin1 could be feedback. Pins 4&5 are connected together and act as output, there is also connection to pin1 to connector with small condensator and inductor. The markings are so small that I cannot read them even with magnifier glass (I'm getting old:-( ) , need stereomicroscope to read them. The U3 could have markings 510B but cannot tell if that's correct. The B can also be some manufacturer logo, code could also be upside down.

I've ruled out a couple smd regulators ( Torek brand ) , any idea what component could really be ? Owon has not answered to my query.

ismo

Reply to
Ismo Salonen
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Owon meant nothing to me so Owon AND oscilloscope in google/images threw up someone's fairly hi-res pic of inside of another model

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any similarity in ps section ? worth a try using a device type from that one, if all else fails Is Owon a rebadge of some other make? again google/im for more general storage scopes, may through up another maker name and model, same appearance though. A USB microscope is a fairly cheap these days useful addition to a repairman's toolkit

Reply to
N_Cook

The scope can be seen e.g here

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. Don't know if its is rebranded something but they do have own pages at
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Pictures of power supply are at

bottom side ( where burnt U3 is )

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and component side

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Hope these help identifying it.

br ismo

Reply to
Ismo Salonen

At the moment the chinese are celebrating new year. In china it is big, compare it with Xmas in the us. Every one is visiting there family. Don't expect an answer in 10 to 14 days.

Reply to
tuinkabouter

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