Re: 2018 15" A1990 Macbook -defective CD3215C00?

Well,

I'll be damned. I pulled the logicboard to measure F3000 and F3001. Both have continuity, and are intact.

Swapped the two paddle boards for further fault elimination, and refitted the motherboard.

And... all 4x USB-C ports are now working normally?!

And yes, I did do an SMC, PRAM, etc reset before this whole exercise.

Is there a CD3215 fault state that requires a complete power cycle to unlatch? I'm genuinely puzzled by this. Here's hoping the...

Re: 2018 15" A1990 Macbook -defective CD3215C00?

Cheers Mon2,

I'm fairly familiar with USB-C and how the PD handshake takes place.

I've got a USB-C monitor/voltmeter/ammeter coming.

"For your Arduino or similar consumer device, you will not have this contract negotiation going in so you will remain with 5VDC on Vbus of the USB Type A / Type C connector."

I get this - this 5V is also missing if I plug in a USB Type A device through an adapter on this port. HOWEVER, from the schematic, it doesn't look like this...

Re: 2018 15" A1990 Macbook -defective CD3215C00?

Thanks Mon2,

Are those fuses still used for supplying 5V power out of a USB port though? From how they are arranged feeding MOSFETs Q3100 and Q3200, it appears they are only for switching the 20V supply onto the port, and in turn for charge protection?

I can definitely get my hands on 0603 32V 6A fuses, if I don't already have them at home. I'm ordering stuff from RS frequently anyway.

PPDCIN-G3H feeds the battery charge circuitry.
PP20V_USBC_XA(orB)_VBUS is directly wired to the...

Hi all,

Just one of the ports on my Macbook just died whilst flashing an Arduino.

There is no 5V usb power out of the port when plugging in a peripheral, and the computer will not charge through the port either. The other 3x USB-C ports all behave normally when supplied with power, or when delivering power.

Another thing of note is that every now and then, the computer will spit a warning that one of the USB ports is drawing too much power, even with nothing plugged in.

I've got a copy of the schematics for this board. From what I can see,...

Re: New Members - please post your introductions here

Hi Guys,

I'm usually a circuit design guy, but one of the USB-C ports on my Macbook just croaked. Luckily, I've got the microscope and all the SMD soldering kit at home, so stand a descent chance of fixing it.

I'm here hoping for some help understanding the CD3215 USB-C controller circuits, as the defect I've got is very different from the standard "won't charge" which almost everything USB-C , Macbook related seems to fit in.

Cheers!