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Hey Guys,
Severe Liquid damaged 820-01700-A. Came in with 5v on charger.
Cleaned corrosion and replaced U9580 as it was cracked. Now getting 20V 0.2A on charger.
pp2v5_NAND_SSD0 is shorted to ground.
Removed L9580 & L9581 to isolate short.
Removed U9580, still shorted.
Removed some...
Okay, ordered some CD3215s.
Removed U3100. replaced D6902. 3v3_G3H is now 3.4V but it is power cycling. Not sure if that is a normal from missing 2 CD3215 or if there is something else i should be looking for?
Will replace both CD3215s when those arrive and update you.
sorry, 0 was meant to be OL.
I was getting around 0.02 on 3v3 LDO before I removed UB400
only checked 3v3 LDO. Will recheck all LDO values when I'm back in the shop tomorrow.
All 4 CD3215s need to be working for 20V right? Meaning, I cant just remove the bad ICs and use the other USB C...
Just checked all my LDOs. U3100 seems to also be shorted to ground. Only getting 0.3V on PP3V3_UPC_XA_LDO and it has very low resistance to ground. only 37 Ohms. I think the issue is with U3100 also. You think i should remove? I really hate the under filled chips so trying to avoid removing lol
Was cleaning up some of my soldering around U6902. L6900 split in two when i lifted it off the board. (Never seen an inductor fail like this) Replaced L6900 and All my voltages changed...
Charger is now 5v 0.03A
PP3V3_G3H is still low @ 0.89V
D6902:
Pin 1: 0V
Pin 2: 5.2V
Pin 3: 3.65V
1...
Thank you, pleasure to be here.
Unfortunately i failed to note the values before replacing the chip but Here are the current Values of U6902:
1: 4.06V
2: 4.27V
3: 0.34V
4:0
5:0
6:0
7:0
8: 4.27V
9: 0.1V
10: 5V
D6902:
Pin 1: 0V
Pin 2: 5.2V
Pin 3: 4.27
Received computer from customer. No history, Just stopped charging one day and wont power on. No Liquid damage found.
Was getting 5v 0.3 amps from charger.
PP3V3_G3H was at 2.7V
No short on PP3V3_G3H.
All other lines on U6903 were present and correct.
Surrounding resistors were correct...