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Accidentally fried wave generator output of Hantek DSO2D10. Is that fixable?
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LinuxHata:
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?
pcprogrammer:
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.
Kleinstein:
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.
pcprogrammer:
If the generator is not enabled the relay is set to external trigger and the opamp would not have received the blast.
LinuxHata:
Thanks a lot!
Will have look next week...
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