ASUS TP412FAC 5V Troubleshooting

s_henya

Badcaps Veteran

Join Date: Jan 2011

Posts: 480

Country: Israel
#1

ASUS TP412FAC 5V Troubleshooting

09-27-2024, 06:55 AM

Hi all,

Trying to save this cutie from going to the scrap.

Brand: ASUS
Model: TP412FA-EC378T

Laptop does not power on properly.

3.2vSTB is available.
5v isn't working

Seems like someone already tried playing with this board.
need datasheet for the below IC LJ=7B

found 1 blown resistor 100-> 10Ohm
some resistors\ caps are missing around this chip.

Anyone can share schematics for this board or datasheet for the above IC?
Attached Files
Tags: None
mon2

Badcaps Legend

Join Date: Dec 2019

Posts: 13894

Country: Canada
#2

09-27-2024, 07:12 AM

https://www.richtek.com/assets/produ...S6258BC-03.pdf

Richtek RT6258CGQUF
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s_henya

Badcaps Veteran

Join Date: Jan 2011

Posts: 480

Country: Israel
#3

09-27-2024, 10:11 AM

Originally posted by mon2

https://www.richtek.com/assets/produ...S6258BC-03.pdf

Richtek RT6258CGQUF

Thanks dear 🙏
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s_henya

Badcaps Veteran

Join Date: Jan 2011

Posts: 480

Country: Israel
#4

09-28-2024, 03:07 PM

After looking at the datasheet provided
i found enable pin is too low 1.4v (supposed to be above 2.3v)

Why is the enable pin low?
Who is supplying that signal?
can i cut this trace and feed it 3.2v?
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ASUS TP412FAC 5V Troubleshooting

ASUS TP412FAC 5V Troubleshooting

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