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820-00850 Liquid damaged u7000 area. 5V 0amp USB

kevinklinkmuller

kevinklinkmuller

Member
Hi there!
This one had a badly damaged U7000 area. I didn't have this exact board in stock so I used a 820-00239 board instead. Replaced some of the components around it and also u7000 itself. I'm starting to realise that this u7000 might not be compatible with the 820-00850. Is that why it's only getting 5V through USB? 0amp.
Already replaced a couple of bad CD32s on it but no change.
 
hambook

hambook

Member
The 820-00239 uses an ISL9239 which is fairly regularly available. 820-00850 uses an ISL9240 which is different and unfortunately can be a pain in the ass to find. These are not sold to anyone but Apple, so anything you find online either lacks firmware to make it work or is a pulled chip of unknown origin and hard to trust. Most reliable way to get one is to get your hands on a newer board that has this chip, or from a similar device that uses it (there used to be an iPhone 7 battery case you could buy for ~$70 and pull one from)
 
kevinklinkmuller

kevinklinkmuller

Member
thank you! found someone here that sells rebelled U7000 on Ebay. Have installed it now. It's different now. 3 of the ports show 5V but are now pulsing from 0-0.04 amps

Then one of the ports is now 20V but doesn't pulse at all and shows 0 amps
 
kevinklinkmuller

kevinklinkmuller

Member
Voltages correct on all 4 chips. the 1v1 lines I guess depend on the USB port that's powered. So as long as I had it in the correct port, it was perfect
 
2informaticos

2informaticos

Administrator
Staff member
If you get 20V in one port at least, SMC has good communication with all CD3215 chips.
You must have problems on the input side of the ports which stay at 5V.
 
2informaticos

2informaticos

Administrator
Staff member
No, LDO means Low Drop OUTPUT.
Input side is related with the dual MOSFETs; like Q3100/200, etc.
CC1/2 lines are also involved in the charger recognition.
 
kevinklinkmuller

kevinklinkmuller

Member
Because I did install two CD3215c006aa51pw chips and now im wondering if that's even correct and might be causing the issues.

I also used Q3100 etc. from a different board and the chip is different. I swapped them back now and I'm now getting 20V on two ports and not just one. I'm guessing there's compatibility issues here with me just randomly picking off similar chips :LOL:
 
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