820-01041 5v

[Sr. Robot]

820-01041 with no signs of damage.

i get 5v on 3 ports and 20v on the XA port.

There are no shorts to ground on any of the LDO lines on the CD3215 chips.

When on the XA port:

PPBUS_G3H = 12.24v but still no boot.

 

[2informaticos]

Do you get correct LDO voltage on all LDOs?

Compare diode mode readings, between all channels; not always only short is bad.

 

[Sr. Robot]

i get every voltage except the PP1V1_UPC´s (diode mode is 0.450 on all)

 

[Sr. Robot]

I replaced UB090 just in case, but no change.

Note: i did test each 1v1 line with its corresponding port connected. All other LDO lines have correct voltage.

 

[2informaticos]

Any history available?

Test if board turns on with charged battery.

 

[Sr. Robot]

Sorry, i made a mistake, one of my probes was displaced and the multimeter was not reading correctly.

I do get 1v on the 1v1 ldo lines except on UB300 (the only port that has 20v).
Replaced UB300 but no change.
Diode mode on PP1V1_UPC_TA_LDO_BMC is still 0.450.

No history available.
Tested board with charger battery but no boot, ppbus is 11.3v

 

[2informaticos]

Do you get expected SLPS2R and AWAKE voltages?
Is the machine recognized in DFU mode?