DX-390 distorted audio
 

I am not a technician or engineer either,but in some cases if you are
soldering or desoldering,you might need to use a heat sink or two or
three or else too much heat might ruin another part or parts.When in
doubt,use some heat sinks.
cuhulin

DX-390 distorted audio
 

Generally most people damage the PCB when soldering or desoldering.

wrote:
I am not a technician or engineer either,but in some cases if you are
soldering or desoldering,you might need to use a heat sink or two or
three or else too much heat might ruin another part or parts.When in
doubt,use some heat sinks.
cuhulin