820-00840-00 a1708

[lincev]

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]

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

 

[lincev]

They also have shorts between them

 

[2informaticos]

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]

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

 

[2informaticos]

So you've removed U7000 before F7000?
Was that more easy for you?

 

[lincev]

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

 

[2informaticos]

Check if any secondary coil gives the same reading to ground.