Hi everyone.
MacBook Pro, model A1706, EMC 3071. Charger shows only 5V and only 0.09A drawn. Board is 820-0239-A. Mint condition. Pretty sure no one ever opened it and was not used much.
I tested all steps from the table here https://logi.wiki/index.php/CD3215_Bootup_Sequence changing the CD3215 lines as I moved from one USB-C to the other.
What I found was:
- on step 3, I have the voltages as 10V and 7.8V, indicated as "Air" on this table, which I suppose would be for a MacBook Air. But this one is a Pro. Same on all DC3215s.
- on step 11, on diode mode, I have 0.47V to 0.48V, not the 0.8V. Again, for all DC3215s.
- the ones marked as 20V there is no reason to test, as the board does not pull 20V from the charger. But I do have 5V in them.
- step 15 says 5V on TBA_AUX_DET. I have 1.3V.
The schematic for this board shows this.
The board does not have that C7016 cap, but has the resistors. They are hard to measure, as are really small. And I know I should remove them from the board. But, on circuit, R7016 is measuring 150k ohms and R7015 is measuring 1.3M ohms.
Any help on what I should try or measure next is much appreciated.
Thank you.
MacBook Pro, model A1706, EMC 3071. Charger shows only 5V and only 0.09A drawn. Board is 820-0239-A. Mint condition. Pretty sure no one ever opened it and was not used much.
I tested all steps from the table here https://logi.wiki/index.php/CD3215_Bootup_Sequence changing the CD3215 lines as I moved from one USB-C to the other.
What I found was:
- on step 3, I have the voltages as 10V and 7.8V, indicated as "Air" on this table, which I suppose would be for a MacBook Air. But this one is a Pro. Same on all DC3215s.
- on step 11, on diode mode, I have 0.47V to 0.48V, not the 0.8V. Again, for all DC3215s.
- the ones marked as 20V there is no reason to test, as the board does not pull 20V from the charger. But I do have 5V in them.
- step 15 says 5V on TBA_AUX_DET. I have 1.3V.
The schematic for this board shows this.
The board does not have that C7016 cap, but has the resistors. They are hard to measure, as are really small. And I know I should remove them from the board. But, on circuit, R7016 is measuring 150k ohms and R7015 is measuring 1.3M ohms.
Any help on what I should try or measure next is much appreciated.
Thank you.
Comment