ThePlague
Active Member
Hello all, I acquired this SX-3400 not too long ago for cheap. I noticed that the speakers sound distorted when the volume is turned up even slightly and the more the bass, the worse it is. I deoxted everything I could and order a full set of replacement caps. I thought it may be the two main filter caps at 4700uf 35v, but I just switched those out with new ones and the problem still exists. I will go ahead and replace all the caps, but does anyone have any ideas? The idle voltage is pretty close to where it should be. However the right is 2.2v and the left is 1.3v. Also to be noted, the headphone portion works perfectly fine.
Here are the old caps, looks like the originals were replaced with ELNA caps at some point, as are all of the caps on the board (ELNA).
Here are the new filter caps installed
Here is an overview of the board
On the bottom of the board I noticed what looks like burn marks, but I believe it is from someone replacing the parts as its from a soldering iron and the solder is a lot shinier then OEM.
Here are the old caps, looks like the originals were replaced with ELNA caps at some point, as are all of the caps on the board (ELNA).
Here are the new filter caps installed
Here is an overview of the board
On the bottom of the board I noticed what looks like burn marks, but I believe it is from someone replacing the parts as its from a soldering iron and the solder is a lot shinier then OEM.