I kill my dso-2820e

I kill my dso-2820e

Postby ROMan » Thu Aug 06, 2020 5:37 pm

Can you help me.

What is the: U2, C101, U7... And other components near USB port.
PCB ver: 11-V1.0
P.S. I can't to buy new one.
https://drive.google.com/folderview?id= ... oShN79iezp
ROMan
 
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Re: I kill my dso-2820e

Postby VirtinsTech » Fri Aug 07, 2020 1:19 am

Sorry to hear that.

1. U2: MIC2025-1YMM. It is not absolutely required. It could be omitted by shorting PIN 6,7,8 together.
2. C101, C16, C99: 10uF/16V, ceramic capacitor, 1206.
3. C12, 4.7uF/16V, ceramic capacitor, 1206.
4. U7: AMS1117-3.3, or equivalent such as ADP3338-3.3
5. L21, L1, L19: BK-1608HS121-T, ferrite bead, 0603
6. C3: 0.01 uF/16V, ceramic capacitor, 0603.

After you replace some of the components, the first thing you need to check is the 5V, +3.3V, -3.3V, +2.5V, +1.2V to see if they are correct.

Please note that the input of the USB DSO is single-ended and a ground loop through the protective earth should generally be avoided when making a measurement. For more information, please refer to "How to make floating or isolated measurements and break the ground loop with a USB oscilloscope?" at https://www.youtube.com/watch?v=0Vo2u11V3fU
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Re: I kill my dso-2820e

Postby ROMan » Fri Aug 07, 2020 1:38 am

SOOOO fast! :shock: COOOL! :)
THANK YOU!
yes, that's my fault. I have shorted the B-channel probe to self ground. and shorted the generator probe to self ground. and got the A-channel probe into a 220 volt outlet.
dso and computer motherboard - die.
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