U7000

[Kandy Swartzel]

Hithis is related to a dead MBP (2010) which shows green light on charger and nothing else. I had earlier tried to locate the U7000 chip and measured voltages around that and had asked experts to help me on this. I have now managed to get a board view file and the circuit schematics. Here are some data that with 65W magsafe adpter connected

Please don't give the individual pin voltages, give us voltages for the G3H power rails (PPBUS_G3H, PP3V42_G3H, etc) and S5 power rails. It will take too long for us to go through all of the pins you have said.

Hi Reece, thanks for your suggestion. After my initial failure of getting an answer, I had followed another discussion forum where it was suggested to measure voltages as mentioned in my last post. I will provide you what you have asked today.

Hi Reece, being not an electronics expert I have some problems regarding finding out the power rails. Looking at the circuit diagrams I have tried to measure PPBUS_G3H at F7040 which is 12.55V and 4.425 G3H at C6999 which is 3.42 V. But I have problem is locating S5 power rail. If you can tell me where to measure the rail voltage (I have the circuit schematics) I can possible do that. I have the following data as well. I don't know whether you can get anything from here.

Can't really give any more advice with this one without looking at it to be honest. If you have fluctuation on the DC in voltage, it will most likely be a nightmare to sort out, and I would just buy a new one unless something stands out as obviously bad. Listen for clicking on the board too, which usually indicates a bad MOSFET.

I have an issue where batter doesn't get recognized, won't charge(no orange light). u7000 pin16 showing 12v leading to Q7055 pin4. Changed u7000 and Q7055 and checked the capacitors and resistors on that circuit. Do you think this is an issue between u7000 and SMC?

I had the same problem and thought u7000 to be faulty. In fact measured voltages at various pins of u7000 and few other chips. I was then suggested to try and check all voltage rails instead. In my case the following configuration was there.

I know this is late but hope it might be useful to someone else. I had same problem, again presumed it would be an internal problem but no internal faults found... turned out for me it was just the insulating gasket in the external port. I found part of it still intact and guessed partial insulation might be that causing a short. The gasket is made of very thin tape Sure enough when I made a copy and put that in, it charged fine on the new charger I had bought. The old charger is dead (on this and a friend's machine) so I presume it was fried shorting while I repeatedly tried to charge before. P.S. I made the copy by making an inverse template with Blutac and used that as a block to print an outline onto the tape.

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