So USB-C meter stays black?
No behavior change filipping the cable?
No behavior change filipping the cable?
-
For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.Subscribe Now
[help] 820-01958 dead: 20v not switching
- Thread starter phantom
- Start date
Are you sure CC1/2 lines have good diode mode readings?
yes all values are good...
PP20V_USBC_T_VBUS is 0v on both ports...
i've done a small experiment, soldering a wire on PP20V_USBC_T_VBUS line and injecting 1v...i can read without problem 1v on the connector...so the line from the motherboard connector to the opposite site of the connector is ok,..
but when i insert the cable, there is no voltage at all, power meter doesn't power on, neither by-3200s that show 0v @ 0a
Do you get voltage on PP20V_USBC_X_VBUS?
VBUS line doesn't get any voltage in the first moment.
The charger only delivers voltage on the VCONN line of its cable.
That will connect with CC1, or CC2 line; depends of the cable orientation.
If the charger will detect correct impedance on VCONN (CC1, or CC2), it will delivers then 5V to VBUS.
VBUS line doesn't get any voltage in the first moment.
The charger only delivers voltage on the VCONN line of its cable.
That will connect with CC1, or CC2 line; depends of the cable orientation.
If the charger will detect correct impedance on VCONN (CC1, or CC2), it will delivers then 5V to VBUS.