Good afternoon all.
After verifying 19V source and testing for short on the DC charge jack, kept hunting..
Pin 5 of PQB3 shows 19V.
Pin 4 of PQB3 seems to from 0.3V down to 0, and repeat.
Pin 1-3 of PQB3 sit around 0.03V down to 0.
_____
Pins 5+ on PQB4 appear to be shorted to ground.
Voltage injection shows inductor PL501 and PU501 getting hot.
For kicks and giggles, removed the inductor PL501, and short at PQB4 is no longer. Would stand to reason that it's on the side of PU501. Side effect: battery charging is active, and 3.3V present on pin 1 (JKB2 ON/OFFBUTTN#).
PU501 is JW5068C, but I can't seem to locate another in my stack of boards, and can't find a cross-reference for it (yet).
Am I on the right track here, or any other suggestions?
Thanks in advance!
After verifying 19V source and testing for short on the DC charge jack, kept hunting..
Pin 5 of PQB3 shows 19V.
Pin 4 of PQB3 seems to from 0.3V down to 0, and repeat.
Pin 1-3 of PQB3 sit around 0.03V down to 0.
_____
Pins 5+ on PQB4 appear to be shorted to ground.
Voltage injection shows inductor PL501 and PU501 getting hot.
For kicks and giggles, removed the inductor PL501, and short at PQB4 is no longer. Would stand to reason that it's on the side of PU501. Side effect: battery charging is active, and 3.3V present on pin 1 (JKB2 ON/OFFBUTTN#).
PU501 is JW5068C, but I can't seem to locate another in my stack of boards, and can't find a cross-reference for it (yet).
Am I on the right track here, or any other suggestions?
Thanks in advance!
Comment