Hi Guys
Today I am playing with a funny behaving power supply board.
Somebody recapped it before, but by the looks of things couldn't get it going as it was popping the fuse. Q803 was to blame. So replaced it with something I had with similar data. Good news - it doesn't pop the fuse, has stand by 3.3v and 5v. But nothing more. Did look at the manual for it and it appears that when its in stand by it gets 3.3 v back from main board. When in full power it should get 0 at the stand-by pin? Am I wrong? tried unplugging main board and bridging controls to see if 24v for inverters would go up. Answer is - NO. Whatever I did with the control pin ( both grounding it and pulling to 3.3v) PSU wouldn't give +24,+12,+5 and +3.3 v (later 2 not the stand by ones).
Does anyone have experience with this junk and if so what are the common problems. I will find the problem eventually, but wanted to see if someone could help out to cut the time a bit.
Today I am playing with a funny behaving power supply board.
Somebody recapped it before, but by the looks of things couldn't get it going as it was popping the fuse. Q803 was to blame. So replaced it with something I had with similar data. Good news - it doesn't pop the fuse, has stand by 3.3v and 5v. But nothing more. Did look at the manual for it and it appears that when its in stand by it gets 3.3 v back from main board. When in full power it should get 0 at the stand-by pin? Am I wrong? tried unplugging main board and bridging controls to see if 24v for inverters would go up. Answer is - NO. Whatever I did with the control pin ( both grounding it and pulling to 3.3v) PSU wouldn't give +24,+12,+5 and +3.3 v (later 2 not the stand by ones).
Does anyone have experience with this junk and if so what are the common problems. I will find the problem eventually, but wanted to see if someone could help out to cut the time a bit.
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