I've just started working on a monitor PSU - its completely dead. I though I'd connect up the scope and have a look around. After connecting the scope ground to the circuit ground (see attached pic - circled in red) I switched on the monitor.
Good job I didnt have a large breakfast - there was an almighty bang. After checking the circuit the track to the 220V fuse was melted.
What gives? Why would connecting the scope ground to this point cause this? I didn't even connect the probe anywhere yet.
**broken link removed**
If it helps any its a Tektronix 2213A scope.
Good job I didnt have a large breakfast - there was an almighty bang. After checking the circuit the track to the 220V fuse was melted.
What gives? Why would connecting the scope ground to this point cause this? I didn't even connect the probe anywhere yet.
**broken link removed**
If it helps any its a Tektronix 2213A scope.