820-3332 Battery Detection

iambehr

Member
Hello,

I am not getting battery detection on this logic board. Tested with a known good battery.

Checked resistance on R5280 and R5281. No corrosion around the SMC that I can tell. PP3V42_G3H is present.

SMBUS_BATT_SCL (SMBUS_SMC_5_G3_SCL) was shorted to ground, the SDA line was OK.

I replaced the ISL6258 U7000 and the short is gone, and diode mode measurements put it in line with another board that I had.

Any thoughts? Bad SMC?

Thanks,

Stefan
 

iambehr

Member
Screen Shot 2017-04-26 at 3.13.42 PM.png
Yup. Schematic threw me off!

Double checked with a new ISL6259 chip, battery detection still f***ed.

Is it worth buying the kit to reball an SMC and replace this one, when I have maybe had 2 so far that would need this?

Thanks
 

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