cobaltmute
Headphoneus Supremus
- Joined
- Jul 2, 2008
- Posts
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1A = USB 5V
1B = 2.5V
2A = negative of 1A
2B = -2.5V
Other points are labelled.
1B = 2.5V
2A = negative of 1A
2B = -2.5V
Other points are labelled.
OK more, I've gone over this thing like a mad man (I dont work today) and I think VDD is connected to ground somewhere... and I think it shouldnt be. yes? no? maybe? 3.5ohm <EDIT EDIT EDIT
Ok, it gets weirder! I changed U7 and now my 2.5 is back up to 4.15ish. I removed L3 and L4, re-installed L3 and U1 seemed to be fine, and my computer reconized it! ok, I thought its all better, installed L4, boom 3.3 back down to 0.81. removed L4 and its the same, removed L3 and its back to 3.3. Soo Iim guessing theres a short on U2 but I have no idea where or how to remove it now.
welli fried my last 2.5 reg i think...but heres a weird discovery, i have no u9, L3, U7 and C34 installed. voltage at 1B started around 4.5 and is droping 0.01v per 2 seconds.
EDIT: I guess thats just a cap bleeding down, wow I'm really looking too hard.