I have a buddy who loves Yamaha and he brought over a unit that was in protection. It was pretty obvious where at least one issue was because a transistor (TR144) and five resistors were completely burnt up - the traces separated from the foil side too. I read on here that when these units fail they tend to take down a whole bunch of components. So I started pulling transistors in the area. I found one more that was dead (TR140). I then pulled all the transistors on the rail and found three more TR126, TR132, and TR134. I have pulled all of those out of the unit but I am trying to figure out if there are more.
I still seem to be getting -65V at the relay and the unit still shows as in protection. So I assume I should keep pulling and testing?
I still seem to be getting -65V at the relay and the unit still shows as in protection. So I assume I should keep pulling and testing?