Showing posts with label Emulator II. Show all posts
Showing posts with label Emulator II. Show all posts

Sunday, January 23, 2022

Emulator II PSU not working.

Crap. Testing the EII regulator board now, and something is seriously wrong. The power led keeps going on and off. 

I disconnected the +/-15V outputs and the 5V works fine. Reconnecting the +15V also works - but I can't trim the 13.2V all the way up, it stops at about 12.95V. That really sucks.

But the worst is that when I add -15V the flashing starts again. Damn.

Update: The -15V is caused by me messing up the polarity of the caps. Such a beginner mistake... The 13.2V is due to the PSU, even under load, only outputting +14V. I have an identical one that outputs 14.5V, that works as it should. Not sure if that means the first one is outside spec or what is going on...