820-00840-00 a1708

lincev

Member
Hello, I received this device, it does not turn on and there are no liquid damages. I bought the Q7040 and I have a short in the pins:

Q7040
1 PPVBAT_G3H_CHGR_REG
2 PPVBAT_G3H_CHGR_REG
3 PPVBAT_G3H_CHGR_REG
4 TBA_GATE_Q3

and Q7030 in:

Q7030
4 TBA_GATE_Q2


Replacement or could the problem come from somewhere else? maybe U7000?

Any ideas? Thanks
 

2informaticos

Administrator
Staff member
Please, post accurate information.
Do you have short between their pins?
Or all of them have short to ground?
 

2informaticos

Administrator
Staff member
Remove Q7030/40 and check if still short on TBA_GATE_Q2/3.
If yes, replace U7000.

Also remove F7000 and check if any pad has short to ground.
 

lincev

Member
I removed the u7000 ic but I still have a short on Q7030/40

I also have a short on the pads on the u7000 ic

U7000
3 PPVBAT_G3H_CHGR_REG
4 TBA_CSOR_P
9 TBA_CSOR_N
13 PPVBAT_G3H_CONN

value 001/ 002
 

lincev

Member
shit!!!, in a hurry I didn't read the second part of your email... obviously it's not a chip that's easy to solder, but I'm stupid.

remove F7000 I have short in PPBUS_G3H
 
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