HP PAVILLION DV7 - not charging battery
In WINDOWS there is indicator that battery is charging but stays on 0% full. Battery is ok. It`s charging normaly on other notebook.
There is 8-pin battery connector with this voltages when battery is present:
3.5V, 3.5V, 3.3V, 3.3V, 0V, 2.11V, ground, ground.
What voltage must be on connector to charge battery?
I thought that there must be some chip controlling battery charging. I found only chip with this marking and no datasheet:
BQ 74740
TI 82W
ZJ6D
Does someone knows is this guy responsible for charging?
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вы не затруднили себя сказать точную модель аппарата, я не затрудню себя переводом.... На аккам ни разу не видел чтобы приходило 3,5 для зарядки, минимум что встречал - 12в. поэтому подозреваю что там где у вас 0 - это и было питание. хотя бес точной модели - хз. по силовой цепи глянте, у нр часто предохранитель по аккаму дохнет...
1000 excuses for non complete informations from me:)
The exact model is: HP Pavillion DV7-1000EF.
There is no charging voltage of 12V at the connector of the battery.
Check the charging circuit.
Thanks Olgert for tips.
I found datasheet for BQ 74740. It`s: Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect
Available at: kr.ic-on-line.cn/IOL_BQ24740/PdfView/1220202.htm
As seen on datasheet there is direct link to Battery that is floating from +3.5V to 12V and back.
I`ll search for replacement and reply the result.
Lets close this subject, I found donor for BQ 74740 and he was to blame for not charging battery.
Thank you Olgert for support.
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