Lenovo IdeaPad Gaming 3 15IHU6 la-l161p nie ładuje baterii

Witam, jak w temacie płyta nie ładuje baterii. Trafiła do mnie z innego serwisu, w którym usunięty został zwęglony kondensator obok PU301


Do momentu usunięcia kondensatora laptop podobno się uruchamiał lecz nadal nie ładował. Po usunięciu kondensatora przestał odpalać i trafił do mnie. Okazało się, że jest zwarcie na linii 3,3V i usmażony jest KBC. Wymieniłem KBC ( zaprogramowany u kochanka Basi płyta znowu odpala, działa lecz nadal brak jest ładowania baterii.
Pomiary:
Na złączu baterii z podłączonym zasilaczem i baterią:
1-4. 11,80 v ( na tyle naładowana jest bateria ) na baterii laptop działa.
5. 3,26 v
6. 3,26 v
7. 0,16 v
8. 0 v
9-12. GND
Charger BQ24800 wymieniony z płyty dawcy i efekt ten sam, napięcia te same:
ACN 1. 19,84 V
ACP 2. 19,84 V
CMSRC 3. 20,42 V
ACDRV 4. 20,42 V
ACOK 5. 0 V
ACDET 6. 2,69 V
IADP 7. 0 V
IDCHG 8. 0 V
PMON 9. 0 V
PROCHOT 10. 0 V
SDA 11. 3,27V
SCL 12. 3,27
CMPIN 13. 0 V
CMPOUT 14. 0,44 V
BATPRES 15. 0 V
BST_STAT 16. 0 V
BATSRC 17. 11,8 V
BATDRV 18. 11,8 V
SRN 19. 11,8 V
SRP 20. 11,8 V
ILIM 21. 0,79 V
AGND 22. 0 V
LODRV 23. 1 V
REGN 24. 1,43V
BTST 25. 11,55 V
HIDRV 26. 11,7 V
PHASE 27. 11,8 V
VCC 28. 19,32 V

Stanąłem w miejscu, proszę o jakieś wskazówki co jeszcze do sprawdzenia.
Dziękuje i pozdrawiam

Measure the resistance to ground on pin 25 of PU2502 (BQ24800) if it is high replace PU2502.

PC304 nie ma tu wpływu na ładowanie baterii.
Zacznij badać od strony akumulatora.

Machine ha scritto:Measure the resistance to ground on pin 25 of PU2502 (BQ24800) if it is high replace PU2502.

It's 2,2MΩ

Replace BQ24800.

Machine ha scritto:Replace BQ24800.

Still nothing. Everything is the same.

in such case, input mosfets get overloaded and as result burned or shorted - with described symptoms I would expect shorted PQ303/310 ..check it and also PQ301/309 for fault/continuity (between drain and source or gate/drain)...if shorted = replace.

ACDRV 4. 20.42 V ...input mosfets PQ301/309 + PQ303/310 are N-Channel MOSFETs - so it is open with positive voltage = Gate has to be higher than Source...as you have nearly same voltage(+0.5V) on source and gate, mosfets are closed = no battery charging
VCC 28. 19.32 V ...=+19V_VIN what power source are you using? ....original should be 20V ....IMPORTANT is also ADP_ID signal from original power source...without correct reading there will be no charging
ACN 1. 19.84 V ACP 2. 19.84 V ....input mosfets not open and still you have voltage from power source?...possible leak as desrcibed sooner?
ACOK 5. 0 V ...charger has problem with power source = no charging

wof ha scritto:in such case, input mosfets get overloaded and as result burned or shorted - with described symptoms I would expect shorted PQ303/310 ..check it and also PQ301/309 for fault/continuity (between drain and source or gate/drain)...if shorted = replace.

ACDRV 4. 20.42 V ...input mosfets PQ301/309 + PQ303/310 are N-Channel MOSFETs - so it is open with positive voltage = Gate has to be higher than Source...as you have nearly same voltage(+0.5V) on source and gate, mosfets are closed = no battery charging
VCC 28. 19.32 V ...=+19V_VIN what power source are you using? ....original should be 20V ....IMPORTANT is also ADP_ID signal from original power source...without correct reading there will be no charging
ACN 1. 19.84 V ACP 2. 19.84 V ....input mosfets not open and still you have voltage from power source?...possible leak as desrcibed sooner?
ACOK 5. 0 V ...charger has problem with power source = no charging

PQ309 was shorted. I don't know how I could miss it

Thanku You for wolf for right directions
Everything is working now