Could use some help with repairing MM4...

isher1992 · #1 12-23-2011, 05:16 PM

Well, I have a dead LED on the Line 6 MM4. I've looked at the PCB, I lifted a solder pad. I've fixed one of the LED's, but the first one still refuses to agree. The positive side of the LED is fine, it's the negative side. I cannot find where it grounds to on the PCB. Any input so I can get this LED functioning would be appreciated.

Von Felgenhauer · #2 12-23-2011, 05:19 PM

Anyway you could just ground it to the negative side of the power supply?

isher1992 · #3 12-23-2011, 05:20 PM

Quote:

Originally Posted by Von Felgenhauer

Anyway you could just ground it to the negative side of the power supply?

I haven't thought of that--Unforunately, I can't find a schematic anywhere to see if that would actually work.

Von Felgenhauer · #4 12-23-2011, 05:26 PM

The only reason why it wouldn't was if it was the on/off path for the Led. Some circuits have power going all the time and cut ground when switching off and on I believe but most of the pedals I've worked with switches the power on and off.

isher1992 · #5 12-23-2011, 05:57 PM

...I am just gonna get rid of this thing.