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we do have 1.05v at c7771. I was looking for a clock chip and realized that is part of the MCPs job. I did check for a frequency at rtc_clk32k_xtalin and out and I get an erratic reading between 31 and 36mhz (jumping) I am not getting any pulse on pm_slp_l when touching smc_onoff_l to ground

Thanks for taking the time to explain these things. I did know they were signals, but I see my mistake. The name was referring to the power rail it started, not the voltage of the signal. I attached a wire to pin5 of the keyboard connector and tapped the other side to ground to mimic pressing...

when I start it by attaching the magsafe it is not pulsing. I think I have checked all of my s5 rails, but this older board seems different than I am used to and it does not seem to have many listed in the schematic

why would I not assume based on the names P1V05_S5_EN would be 1.05 volts and P1V05_S5_PGOOD is also 1.05 volts? I am asking to try and learn and understand

I replaced both d7010 and u7000 and I do now have a good ppbus of 12.6. For what it is worth, the charger always stays green and does not go to orange. I do not have any voltage on pm_slp_s4 I was looking at u7750 and some stuff does not seem right. I would expect 1volt on both pins 2 and 3...

I am still waiting on my ISLs to ship. Just curious, my oversized replacement for d7010 only drops 4/100ths of a volt, 18.50 to 18.46, is that normal? I was expecting more like 4/10ths of a volt drop. Could this cause any issues? also will any ISL6258AHRTZ work? I see some have a second group...

It is a cheap one I have used for years. I will throw it away. I have only been buying genuine ones since I started following Rossman videos. Assuming the charger is not what fried it, could other things be doing it?

after pulling off the ISL, the only shorts are 6 and 22, but I think they are both grounds and normal. I am hesitant to put another one on as something is frying it. The board came to me with a bad d7010. I replaced it and I had ppbus for a few minutes then d7010 fried again. I then replaced...

I now have 22.5 ohm between 17 and 18 and still have 20.4 ohm between 27 and 28. May I ask what you were checking for when you asked for these? these are the new voltages on the isl pins: 2 18.5v 3 4.4v 19 0.2v 20 0.2v 12 3.4v 1 18.6v 14,9,15 all have 0v I also have short on 19...

now I lost ppbus, or it is .4 volts :-( This time d7010 is still good. I wonder if I shorted something on u7000 by checking voltages on some of the other pins(just curious). I will get more info later for you. Thanks for all of the help.

I am sorry for being unclear. My oversized D7010 is still good and I still have a good ppbus. I was trying to say, whatever caused d7010 to burn out twice, will it happen a third time? What has changed?

I do have a good ppbus of 12.61. I did before for a few minutes last time, but it did not last and d7010 burned out.

I am embarrassed. I am not sure what I did, but 17 is not shorted :-( Sorry. I think I may have read M(ohm) as plain ohms

I did put a big fat diode on there. Pin 2 is not shorted. I have a short on pin 17.

what do you mean it is not critical? Do you mean a different type of diode with a 100ma limit can be used or I can just use a jumper(probably not).

is SI mean a silicone diode? Is the difference having a slightly greater voltage drop? Could you give any suggestions on what to search for in the schematic in regards to finding a replacement?

Well, this was interesting. I switched out the diode and had a good ppbus of 12.6v. I think I still had other issues as it was not pulling hardly any amps. I was wondering about the missing green light on the charger and noticed one of the power pins was pushed in. So I grabbed an after marker...

thanks. I will try that tomorrow. Does that diode change the voltage or just work as a one-way valve?

I did switch the isl, and the short is gone between pins 3 and 19. The only voltage change is I now have 4.35v at pin 3. I still have the same voltages at 12 and 1. Do you still need me to check for shorts/lows on the other isl pins?

of the 9 voltages (2, 3, 19, 20, 12, 1, 14, 9, 15) you asked for I have 0v on all of them except 3.4v on pin 12 and 18.2v on pin 1 is this what you are asking?