Sundown Audio NS-1

[RJohns777]

Working on An Ampere Audio AA-9.0 TFHE. Same as a Sundown Audio NS-1. Anyone know which pin on the power supply driver board is the turn-on? If anyone has a schematic that would be great. Amp was dropped in shipment. When you power it up the relay clicks but power supply does not run. The driver board has ground and 14V going to it but I don't know which pin turns it on.

 

[Perry Babin]

I don't know either of those amps. If you don't get a definitive answer, post good quality photos of the main and driver boards.

 

[RJohns777]

A friend brought over a working amp just like this one. I was able to find the pin that turns on the power supply driver board. Broken connection between the turn on transistor and the driver board. Had to run a jumper. problem solved.