The longer leads are soldered to the traces on the back side of the board after insulation has been stripped from the traces to provide a larger solder pad. The cure is to replace the existing rectifier with a new rectifier with longer leads mounted with ample space between the PC board and the rectifier.
This in turn causes a loss of high voltage DC current to the circuit that results in the amp cutting out or totally losing output. The rectifier produces a lot of heat and often eventually damages the solder joints on the back side of the board causing intermittent or open connections.
The problem is a bridge rectifier installed on the PC board with no space between the rectifier and the board. If you own a Marshall JCM 2000 DSL 201 or 401 this is a mod you should consider.
0 kommentar(er)
