Hello everyone! I thought you might be able to help me to do a DIY repair 🙂
So, i have a Topping Mx3 that has been lovely in my garden house. Didn't think of bring it indoor during winter. The problem is most certain caused by condensation or too cold temperatures. Have opened the amp and had it indoor for more than a month. Cleaned the circuit board with Isopropanol, but the problem persists
Where do I start to troubleshoot the board? All tips a welcome!
Symptom when I connect the speakers:
Left + and -, around 10 k ohm.
Right + and -, around 10 k ohm.
So, i have a Topping Mx3 that has been lovely in my garden house. Didn't think of bring it indoor during winter. The problem is most certain caused by condensation or too cold temperatures. Have opened the amp and had it indoor for more than a month. Cleaned the circuit board with Isopropanol, but the problem persists
Where do I start to troubleshoot the board? All tips a welcome!
Symptom when I connect the speakers:
- Left + and Left -. Dead silent.
- Right + and Right -, Sound
- Left + Right -, Sound.
- Right + Left -, Sound
Left + and -, around 10 k ohm.
Right + and -, around 10 k ohm.
Attachments
Poke around on the board with a non-metallic tool and see if the L- is affected.
There could be a bad solder connection.
There could be a bad solder connection.
I like your thought.
So, if I but the board on an insulated material and starts it up. I might be lucky to push down the bad connection and then I know which component point to focus upon.
So, if I but the board on an insulated material and starts it up. I might be lucky to push down the bad connection and then I know which component point to focus upon.
Just lay it on a wood desk etc. and gently poke around with an insulated tool, maybe a pencil eraser to start.
If you find an area that is sensitive, use a smaller, harder tool to localize it further.
It's much more likely to be a bad solder joint than a bad component.
Also try reseating any connectors.
If you find an area that is sensitive, use a smaller, harder tool to localize it further.
It's much more likely to be a bad solder joint than a bad component.
Also try reseating any connectors.
Unfortunately no success. Poking around and do not even get a single static spark from the left speaker....
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Don't have any oscilometer. Tried to measure uA with my multimeter but not sure what I am looking for...
With the multimeter I get similar voltage readings for the L R speaker outlets and over the "mirrored" components (inductors, blue capacitators)on the two sides of the big capacitator.
The cleaning didn't do it. It's seems like I have been beaten. Probably have to give up on this amp ☹️