Search found 13 matches

by viewu
Fri Mar 09, 2018 12:38 am
Forum: DSO138
Topic: DSO138 3.3V test lead wrong voltage
Replies: 1
Views: 3652

Re: DSO138 3.3V test lead wrong voltage

Did you short jp4 and test u3 pins?
by viewu
Mon Feb 26, 2018 8:07 pm
Forum: DSO138
Topic: Question about test signal voltage on DSO 138
Replies: 3
Views: 5319

Re: Question about test signal voltage on DSO 138

Have you looked at datasheet for U1 pin 17 this seems to be where R6 limits currnt? The datasheet migth tell you what good voltage should be there.
by viewu
Sun Feb 25, 2018 9:03 pm
Forum: DSO138
Topic: DOS TRACE VOLTAGE
Replies: 2
Views: 4095

DOS TRACE VOLTAGE

My DOS worked fine for a month, then it failed.I checked it with a meter and found a short in the reference voltage point 3.3v and U1 pin 1. This is duzz because the problem is somewhere in the trace line. I have removed components and the failure is still there. I would like to view a copy of the t...