Hey all, This is a warranty repair from a previous job I had. You can see previous thread in the link.
I am suspicious that the battery I got was crap (amazon purchase). Unfortunately I do not have another battery to test it with on hand and I am located in south america so shipping will take its sweet time.
Battery is detected in os but not charging an at 0%. Client said it started to charge slowly. Knowing that Q7055 is the common problem of slow charging, I changed it out again. (I think I was an idiot before when I originally got this unit in and tried to stick an A1321 battery in the thing like a jackass after reading one forum that said they were compatible... without doing voltage tests myself first.) So I expect revers polarity entered the battery port.
To jump right to the problem,
Q7055
With battery connected
pin 1-3 12.57v
pin 4 shifts between 12.1ish and 12.53v
pin 5 ~1-3v
Without battery connected
Pin 4 will change between 5v and 12.54V every 5 or so seconds.
Pin 5 will change accordingly to a correct throughput voltage
Feedback resistors are good,
Bad ISL due to incorrect battery polarity before or bad battery now?
I am suspicious that the battery I got was crap (amazon purchase). Unfortunately I do not have another battery to test it with on hand and I am located in south america so shipping will take its sweet time.
Battery is detected in os but not charging an at 0%. Client said it started to charge slowly. Knowing that Q7055 is the common problem of slow charging, I changed it out again. (I think I was an idiot before when I originally got this unit in and tried to stick an A1321 battery in the thing like a jackass after reading one forum that said they were compatible... without doing voltage tests myself first.) So I expect revers polarity entered the battery port.
To jump right to the problem,
Q7055
With battery connected
pin 1-3 12.57v
pin 4 shifts between 12.1ish and 12.53v
pin 5 ~1-3v
Without battery connected
Pin 4 will change between 5v and 12.54V every 5 or so seconds.
Pin 5 will change accordingly to a correct throughput voltage
Feedback resistors are good,
Bad ISL due to incorrect battery polarity before or bad battery now?