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A long shot here - but has anyone ever seen a schematic for the A1481 Mac Pro 2013 (garbage can)
I have a water damaged one that needs some attention but this will be almost impossible a schematic
First attempt at fixing a 820-00239
An immaculate board, no water damage, no hot components the only area of fault is burn at J4402 between PP5V_S0_T139 and ground
All power rails look good including PP5V_S0
With battery and J4402 disconnected at start up it's pulling 640mA then up to 720mA...
Well, I thought I had the USB-C power negotiation sorted .. It seems not.
So I have an 820-00840 with no power.
PPBUS_G3H 0v
UPC_XB_GATE1 = 0v
UPC_XB_GATE2 = 4.9v
Now, why is the voltage at gate1 0 ?? How the hell does this USBC controller work
Im looking for a replacement for L6995 on the 820-00840 board. It's specified as 10uH / 1.4amp / 0.4ohm part number - PIYA25201B-SM. I cannot find the exact device, usual searches turn up nothing for a PIYA 2520 1B. Additionally i cannot find anything as small as this device .. The remains of...
So this board initially had corrosion around the Thunderbolt boost regulator L3095 and Q3088.
After an ultrasonic the board seems to come to life .. fan spins for a few seconds (between 3 and 5) then it's back into an S5 state.
This seems a very different problem to the 1/4 fan spin mentioned...
Let's say someone ( .. definitely not me ... ) managed to jab a pair of really sharp micro tweezers covered in Amtech flux into their finger. What would the long term prognosis be? And if those tweezers carried a 0201 resistor deep into someone's ( ... again not me ... ) vein what might happen?
Hi
Bit of a noob here so please excuse the no doubt dumb questions.
I?ve been working on fixing a A1466 / 820-00165 Mac Book Air and I?ve got to the point where the main power rails are looking correct but I?m not sure where to go from here. I'm getting a green then organ light from the...