No signal < 0.5V/Div

jye1
Posts: 1228
Joined: Wed Feb 20, 2013 4:58 pm

Re: No signal < 0.5V/Div

Post by jye1 »

For the broken D2 it can be replaced with any diodes in 1N4000 series. This diode is for protection purpose only and can be shorted with on affection to performance.

Can you please measure the resistance between the two poles of C3 and post it here?
KSV
Posts: 4
Joined: Sun Dec 18, 2016 7:11 am

Re: No signal < 0.5V/Div

Post by KSV »

I have the same issue as Jlough (assembled from 15001K kit),
the short video, explaining the situation: https://youtu.be/43YyN5yoBV0

V4 voltage is 1.45 instead of expecting 1.6, but I thinking that this is the mistake of mutlimeter. I've checked the resistors mentioned in troubleshouting section. All is correct.
All the other voltage points is correct.
jye1
Posts: 1228
Joined: Wed Feb 20, 2013 4:58 pm

Re: No signal < 0.5V/Div

Post by jye1 »

@KSV:

Have you done VPos alignment? If not please do it and re-try the 0.1V calibration.
KSV
Posts: 4
Joined: Sun Dec 18, 2016 7:11 am

Re: No signal < 0.5V/Div

Post by KSV »

jye1, thank you for the help!

I've made the VPos calibration, switched to GND. Now, I see the horizontal line at the middle of the screen at all sensitivity modes (GND).
Then I switched to DC (as shown at calibration photo in manual). I see the same situation as before, no curve.
Here is the picture with the voltages info:
01V-50mv-DC.jpg
However when I switched to AC, I see the curve:
01V-50mv-AC.jpg
This is normal, or not?
Attachments
33V-50mv-DC.jpg
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