Hi,
I have another problem: I don't have any signal. The signal line appears, but neither the square wave or a DC input signal is working. Basically Some problem in the signal acquistion. What should I test ?
Thank you
Search found 5 matches
- Sun Jun 19, 2016 5:40 pm
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279605
- Sat Jun 11, 2016 12:55 pm
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279605
Re: DSO138 troubleshooting - No AV- (no trace)
Hi,
Now I can get a waveform similar to a square wave, but very rounded. And on the SEN1 switch, the 0.1V scale is not working, because when the switch is on that position the wave disappears. But we are on the good way
Now I can get a waveform similar to a square wave, but very rounded. And on the SEN1 switch, the 0.1V scale is not working, because when the switch is on that position the wave disappears. But we are on the good way
- Fri Jun 10, 2016 7:33 pm
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279605
Re: DSO138 troubleshooting - No AV- (no trace)
Yes, I've removed L1, and on the D1's anode I have about -20V. What can I test now ?
- Thu Jun 09, 2016 12:53 am
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279605
Re: DSO138 troubleshooting - No AV- (no trace)
I've tested it, and for the direct current flow, 0,4 , and infinite impedance on the reverse. I think the problem isn't from the diode D1
- Mon Jun 06, 2016 1:23 pm
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279605
Re: DSO138 troubleshooting - No AV- (no trace)
Hi everyone ! Yesterday, I've been finishing my DSO138 oscilloscope. After finishing everything, I have the "no trace" problem too. I've been reading all replies on this forum, but nothing worked for me. I've tested a few points on the pcb, and the voltages that I have are: -> AV- = -0.68V...