A1708 Logic 820-00875-A

[pipsystems]

Hello,

USB-C meter does not power on, board appears bone dry

CD3215 chips both produce 3.3V and no unusual heat under thermal camera

injecting 1-8.6V into ppbus_g3h produces no amperage

D6905 Measurements:

1) 500mA -> Slowly decreasing (PPBUS_G3H)
2) 100mV -> Stable

please help me I'm still new to this

 

[2informaticos]

First of all, welcome to the forum!

Please post accurate information.
How do you get 3V3 on CD3215 chips, if USB-C meter stays black?
Do you really get black (no indication) USB-C meter ("does not power on"), or is stuck in 5V?

Never inject voltage into a power rail, before checking for short first.

No idea how to interpret your measurments to D6905.

 

[pipsystems]

Thank you for the welcome. it really does not power on, I was using a dc power supply connected to a usb-c end with 20V going into it, then I removed it and hooked up 1V to the g3H line and it draws insignificant amperage 0.007A

 

[2informaticos]

Don't do again such tests without reason.

"Do you really get black (no indication) USB-C meter...?"
If yes, the charger detects a problem with VBUS, or CC1/2 lines.
Check diode mode to ground at all LDO rails of CD3215 chips.