#21 Re: Lenovo Y50-70 płyta LA-B111P nie ładuje baterii, uszkodzony PQ302
przez matic • 9 maja 2019, 15:54
maciek1221 napisał(a):I used TPC8103As @Machine said that transistor is not good replacement, because it is too weak.
Check the resistances between listed pins of old (original) transistor PQ303, when it is removed from the board:
a) Between pin 1 and pin 4.
b) Between pin 1 and pin 8.
c) Between pin 4 and pin 8.
If all resistances are high (in kΩ range or grater) the transistor is good, so you can solder it back to the board.
Also measure the voltages to ground on pins 1, 4, 8 of transistor PQ303, when it is soldered on the board (power supply + battery connected).