820-01814 no USB activity

[Fizzl92]

Hello,
I'm working on a 820-01814 that was water damaged. I got it with U3100/U3200 area fluxed and both ports not turning on USB-C-meter at all. The other two ports were stuck at 5V/400mA. U3200 was getting hot.
This board raise a few questions for me regarding CD5215s. My schematic states that all 4 are CD3215A. That is clearly wrong. It came to me with 2 CD3215C00Z 92C4L8W (not reworked) and 2 CD3215C00 87C4J6W (surrounded with flux) on it.
- Is that factory, or should it have 4 identical ICs on it?
- Are the 7 characters behind the C00 important at all?
- Should it work in this configuration?
I know that these ICs work in a master/Slave configuration.
- Must Master and Slave be identical (U3100/U3200 be both CD3215C00Z or is one with "Z" and one "normal" CD3215C00 ok too?)
- Does the "Z" even make any difference?

I started with replacing the hot IC (U3200) with an CD3215C00 86C287T from a donor (A1707). Now all 4 ports were completely dead. I replaced it again with another IC from that same donor (marking CD3215C00 8C280T - in case that IC was bad/died during reballing) - no change. After that I replaced the other reworked IC (U3100) with the first IC I took from my donor (the one I used for the first U3200 replacement) but still nothing. Now I'm a little confused.
Diode mode reading on PP20V_USBC (F3001) is 0.220V and on PPDCIN_G3H is 0.553V. I can't compare that but no direct short there. Now I want to make sure I'm on the right path. My next suggestion would be to use 4 identical ICs and buy 2 CD3215C00Z as I imagine that this board was produced with 4 identical ICs and the ones with the "Z" are still untouched.
But before I waste more time and money...
Thank you for any help.

 

[2informaticos]

C00 is what matters on the code.

You still have ports where power meter stays black?
Check diode mode to ground on their CC1/2 lines.
S-UEM2 tool helps a lot in case like this.

 

[Fizzl92]

Thank you. All 4 ports were dead. The CC-lines were the issue. DZ3301 was damaged (mechanically broken). My guess is that 2 ports were dead because the one DC3215 was shorted. After replacing it, all 4 could communicate again, and therefore all 4 were dead because of the CC-line issue. Now all 4 ports work perfectly fine. Thank you very much.
Last thing I'd like to know is if these boards should have 4 identical ICs on them (as the older ones) or if it is normal that this one had 2 ICs with the exact same number (even after the C00) on it and 2 with another number (just in case you know that).

 

[2informaticos]

Identical chips, all C00...