Dynacord pm3

[Rezasheykhi]

Hi, i have problem in power amp board
The protection light is on how can i resolve that pleas help me
Thanks

[Jazz P Bass]

Being that the protection light is on, you may have a shorted power amp output section.

Be aware that this is not a simple unit.

The power supply is of the switch mode type.
Microcontroller monitored at that.

The power amplifier is of the Class D configuration.

If you are real experienced at this type of equipment, I would suggest that you try to come up with a schematic.

If not, take it to someone that is.