820-3662 doesnt charge the battery

[arnonabuurs]

I have a liquid spilled 820-3662 retina that had a minor liquid spill near the battery connector (customer used 50% alcohol to remove battery). No LED. Some spill was on ISL6258 area so I replaced that one and some small IC around it. Now the macbook can start up and working, it shows battery is charging in the top bar, however if I look in the system report - power it shows no charge, battery is going down. I have checked R5380 and R5381 they seem OK (2K Ohm). Any other suggestions?

PS also tried another battery same story

 

[aprendiz]

I guess you mean ISL6259 not 58.............

Check sense resistors R7151/52, R7121/22 and traces.....

 

[dukefawks]

It is a ISL6259....

 

[arnonabuurs]

Yes sorry typo, thanks for the quick reply much appreciated, will test now

 

[arnonabuurs]

R7152 = 0
R7151 = 2.2 (not sure how to read that 2 2 in schematics... I guess 2.2?)
R7121 = 10
R7122 = 10

Lines OK from pin 1 R7152/51 to ISL and from pin 2 to R7150.

 

[dukefawks]

Does this machine power on without the battery connected? What voltage is PPBUS without battery?

 

[arnonabuurs]

No it doesnt, good one , its 1.8v fluctuating a bit. Do have orange light on Charger. Looking for a short in AC charger circuit?

 

[dukefawks]

Must be issue with sense resistors or some other component around ISL6259. Measure resistance between pins 17/18 and 27/28.

 

[arnonabuurs]

So i did recheck:

1. Al lines from ISL6259 to R7020 and R7050 are OK
2. Resistors have the right ohm
3. Pin 17 resistance to ground = 0.694
Pin 18 = 0.617
Pin 27 = 0.592
Pin 28 = 0.597

Or I have to measure resistance between pins differently? Sorry im a bit of a noob. I only know red probe on ground black on measure point which is what i did. Could it also be a bad ISL IC?

 

[dukefawks]

I asked the resistance between 17/18 and 27/28 not diode mode to GND. I can already tell there is something wrong with 17/18 as on diode mode they should be almost the same. Check traces going to 17/18