Author Topic: Accidentally fried wave generator output of Hantek DSO2D10. Is that fixable?  (Read 1241 times)

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Offline LinuxHataTopic starter

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Connected the generator output probe to 12VDC power supply (generator output was not active). There was a bad smell from the scope and power supply entered into short circuit protection. Now scope works partially - both channels are working as usual, but wave generator output and external trigger does not work at all. I rarely use any of them, and scope is long time out of warranty, so the question is, that I believe, this might be a common issue, so maybe anyone have experience in fixing this? is there a circuitry of this scope available?
 

Offline pcprogrammer

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Schematics and other information can be found here: https://github.com/pecostm32/Hantek_DSO2000

With a bit of luck it only fried the protection diodes into a short.

Online Kleinstein

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As the external trigger is also not working the protection diodes (or at least one of them) are very likely dead. There is a chance this could be the only damage. Though outside the specs the OP-amp could have survived some 12 V via 50 ohms.
Even than it would still be viabel to also exchange the amplifier.

The protection looks a bid odd. Instead of the diodes to the +-5 supply it would be more sensible to have transsorbs towards ground and ideally with polymer fuse as part of the 50 Ohms matching resistance.
 

Offline pcprogrammer

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If the generator is not enabled the relay is set to external trigger and the opamp would not have received the blast.

Offline LinuxHataTopic starter

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Thanks a lot!
Will have look next week...
 


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