 Posted: Sun Aug 11, 2019 8:01 pm Post subject: Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020 = Voltcraft_204 |
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It's working and calib.   Thank you, Ruy |
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| Posted: Sat Feb 23, 2019 5:33 pm Post subject: Oscilloscope UNAOHM G4020 = BECKMAN 9020 = Voltcraft_2040 |
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| Hi, A friend offered Oscilloscope UNAOHM G4020 = BECKMAN 9020 = Voltcraft_2040 In first hours worked ok ... I saw the 0,2 V 1000Hz and other signal in the cinescop. But now I only see 1 or 2 dots (channel 1 or both or ch 2) I can move the dots UP and DOWN, LEFT and RIGHT so the screen - cinesc. is working. I test the trigger, connect CAL 0,2 to ch 1 or 2 and the dot is in 1 , 2 or more lines up depend on VOLT/DIV INV - and the dot go down invert. A sinos. wave, I can rotate TRIG LEVEL and the dot follow the wave. But I can't see the wave in display Some examples of scope: youtube.com/watch?v=3nBYp1pN40U youtube.com/watch?v=fPq1KgQ5ggQ youtube.com/watch?v=5osskamWJHg Manual and schemat. I have the French and Germany version. archive.org/details/voltcraft_Voltcraft_2040_Oscilloscope_Service_manual eserviceinfo.com/downloadsm/63296/Beckman%20Industrial_9020.html Can you please provide help? Thank you, Ruy |
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