EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: btesser on October 14, 2014, 03:06:40 am
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I recently got a dso5072P which I ordered off ebay. Attempted to do the hack and I soldered 4 posts to the uart port (the one right next to the usb port). The posts were a tiny bit large so I had to force them in a bit (they are about arduino sized pins). When I tried to power the dso back on, however, I got absolutely nothing showing up on the display or uart. I disconnected everything, desoldered the pins, pulled the posts out.pulled out a multimeter. When I checked ground/power on the uart pins, my multimeter showed a very low resistance I believe 64ohms(my reading of the multimeter may be wrong. With multimeter set to resistance 200 it showed 64 on the sy creen). I made sure I really cleaned the board of solder well where I had added the pins using a solder sucker and solder wick. No matter what I do I'm getting the same reading on my multimeter. Is it possible I bricked one of the inner layers of the board by forcing the pin in? I tried putting the positive multimeter probe on the uart positive and the negative probe on grounds in different areas of the board and got the same reading. Uart ground to other grounds reads 0.
Does anyone have any ideas? Right now I'm bugging out a bit because if I bricked my dso I just threw about $300 down the drain :-( :-\ Please help
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When I checked ground/power on the uart pins, my multimeter showed a very low resistance I believe 64ohms(my reading of the multimeter may be wrong. With multimeter set to resistance 200 it showed 64 on the sy creen). I tried putting the positive multimeter probe on the uart positive and the negative probe on grounds in different areas of the board and got the same reading. Uart ground to other grounds reads 0.
That reading means nothing. There will be capacitors from Vcc to GND, you're seeing those.
Much more important: How many volts does it read when you power it on?