820-00850 5v/300ma or 20v/0ma with battery

[No-Clean]

Board came in with corrosion around CD3215 U3100, U3000 was corroded and missing a pad, some other pads on board needed to be rebuild and some resistors R3105, R3108 and R3109 also got replaced as well as both CD3215 and U3000, I still only get 5v and 300ma with board alone, whats weird is that the battery has a charge still and board powers on, when I plug in the charger on the affected port with the board on the casing I get 5v when I first plug in, but if I unplug it and plug it back on then I get nothing on the meter, all other ports while the board is on the casing give me 20v wit 0a.

ppb3v3_g3h is 3.3v
PP3V3_UPC_XA_LDO is 3.3v

I was barely getting a hang of the older boards, this USB-C boards are kicking my ass.

 

[2informaticos]

Do you get 20V on 3 ports and only one stays at 5V/300mA?
300mA is too much for USB-C port stuck on 5V.
Compare diode readings on LDO outputs of CD3215 chips.

 

[No-Clean]

Diode mode on all CD3215 is 0.500

To be exact with no battery I get 5.1v and 0.25a on all ports
With battery I get 20v 0a and 3 ports and port with corrosion gets 5.1v and 0.25a but only when I first plug in the charger, after that I connect it and meter shows a blank screen.

 

[No-Clean]

By the way, this board has CD3215C00Z and I replaced it with CD3215C00, not sure if that affects anything

 

[2informaticos]

You still have problems on the USB-C port with different behaviour.
And I doubt that you get 0.500 on ALL 4 LDO outputs of each CD3215 chips...

 

[No-Clean]

I now got it, those LDO lines are pins 2,35,53 and 75 on the CD3215 they all range from 0.480 to 0.515 on this board it turns out my "new" CD3215 were all BAD, I got this fixed using a CD3215 from another board after rebuilding some lost traces.

Thanks again!