Dell 15R 5537 (LA-9981P) No power

会员656621 · 发表于 2016-11-21 14:10:20

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Hi all,
I have dell 5537 la-9981p which have no power problem and B+ supply is 0.83V.
There is no B+ supply generating from PU701 BQ717. I have replaced BQ717 but still there is no change in situation.
Here is supply of BQ717.
PIN 4 ACDRV = 19V
PIN 6 ACDET = 2.5V
PIN 5 AC OK = 3.5V
PIN 20 VCC = 19V.
B+ SUPPPLY is only 0.83V.
kindly help me to solve the problem.
Thanks

会员974675 · 发表于 2016-11-21 14:13:43

kindly help me to solve the problem.
Thanks

会员1112646 · 发表于 2016-11-21 14:28:58

http://www.chinafix.com/thread-975661-1-1.html
this is computer drawing.
you should check B+ is short circuit?
If not change ,please refer drawing check work sequence.
check ACIN and related devices.like bq717 and C or R
I hope you can repair the conputer! come on friend.

会员1067769 · 发表于 2016-11-21 14:52:01

大家好，
我有戴尔5537 la-9981p没有动力问题和B +供应0.83v。
没有B +供应从pu701 bq717生成。我已经取代bq717但仍然有情况没有变化。
这是供应bq717。
引脚4 19v ACDRV =
6 = 2.5v ACDET销
引脚5交流好= 3.5v
20引脚VCC = 19v。
B +供应量只有0.83v。
请帮我解决这个问题。
谢谢
在线译了一下，看看有没有人能帮助一下这个可能是外国的维友！

会员656621 · 发表于 2016-11-21 17:25:28

There is no sorting. laptop is working on Battery. If charger is connected with battery it shows charging but battery is draining instead of charging.

会员656621 · 发表于 2016-11-23 14:05:22

Thanks for reply but There was problem in the VIN mosfet. My problem has been solved after replacing the mosfet.

会员478385 · 发表于 2016-12-9 02:08:33

I have a same program ,hoppe one friend can anser this question

会员1066506 · 发表于 2016-12-9 10:06:32

仁宝保护隔离没过

会员1066506 · 发表于 2016-12-9 10:07:58

atree2012 发表于 2016-11-23 14:05
Thanks for reply but There was problem in the VIN mosfet. My problem has been solved after replacing ...

Good luck！

Dell 15R 5537 (LA-9981P) No power

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