Apparently, yes. The only two points with substantial difference (more than 1V) are TP25 and TP26. My power supply provides 8.7V.jye1 wrote:Did you check the voltages according to the first post of this thread?
Search found 2 matches
- Tue Nov 17, 2015 7:21 pm
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279752
Re: DSO138 troubleshooting - No AV- (no trace)
- Mon Nov 16, 2015 9:18 am
- Forum: DSO138
- Topic: DSO138 troubleshooting - No AV- (no trace)
- Replies: 97
- Views: 279752
Re: DSO138 troubleshooting - No AV- (no trace)
I have a random noise, but no signal.
I've burnt my U5 and replaced it already, also failed to identify U2 pin1 and had to replace it too.
Now all voltages are good except AV- (TP26, -2.54V, should be -5V ) and V- (TP25, -2.02V, should be -8V). Could it be the failed D1?
I've burnt my U5 and replaced it already, also failed to identify U2 pin1 and had to replace it too.
Now all voltages are good except AV- (TP26, -2.54V, should be -5V ) and V- (TP25, -2.02V, should be -8V). Could it be the failed D1?