Any one could share the schematics of KALG1 LA-5272P? Unit is totally dead... Tried already replacing ENE and isl6237... Switch voltage is always at 19vdc.
Thanks....
Thanks....
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Re: Aspire 4736z KALG1 schematics
try to flash the bios. -
Re: Aspire 4736z KALG1 schematics
Schematics.Comment
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Re: Aspire 4736z KALG1 schematics
Is it possible due to bios problem why it is totally dead? I'm concerned with the supply voltage at the power switch that instead of 3.3vdc i got 19vdc. Which is not normal for me.
Thanks for the schematics.Comment
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Re: Aspire 4736z KALG1 schematics
High voltage in power switch, is perfectly normal. It comes from PQ1 (page 37) trough its internal diode, and PR12/ PR13, reaching the 51ON# point.at the power switch that instead of 3.3vdc i got 19vdc. Which is not normal for me.
Check pin 8 voltage of U13 (bios chip) in order to know if there is +3VALW.Comment
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Re: Aspire 4736z KALG1 schematics
Thanks for the info.... BTW, is +3VALW is same with +3VALWP? I'm just a bit confused with the power up sequence of laptop computers. Just really wanted to know everything why it became dead. Because at some brands i always got 3.3vdc at power switch line.Last edited by salawayon; 10-02-2013, 10:46 AM.Comment
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Re: Aspire 4736z KALG1 schematics
Yes, +3VALW is the same as +3VALWP, they are joined by PJ2. (JUMP_43X118)
You can cut down pj2, in order to isolate both voltages.Comment
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Re: Aspire 4736z KALG1 schematics
When it will became 3.3vdc at switch line, after pressing the switch when everything is ok?or it will always be at 19vdc during standby?Comment
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Re: Aspire 4736z KALG1 schematics
Found it (PJ2) at p37. Maybe i'm dealing with same problem with lenovo g475 they got same schematics.Comment
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Re: Aspire 4736z KALG1 schematics
+3VALWP should be there as soon as you connect ac adapter, and signal MAINPWON go to high level, and if PU4 is not damaged.Comment
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Re: Aspire 4736z KALG1 schematics
No voltage is present at all pins of U13... Even +3VALWP at PU4 not present.... Tried already replacing PU4 but still the same.Comment
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Re: Aspire 4736z KALG1 schematics
19vdc at pin6 of PU4 is measurable. Do i have to replace again the PU4?Comment
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Re: Aspire 4736z KALG1 schematics
I'm trying to add. if no voltage 3/5valw of: ic power, embedded controller (ec), sb chipset, vga.Comment
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Re: Aspire 4736z KALG1 schematics
You have 19v right? now, Check the voltage of pin 1, 7, 4, 14, 27 of PU4.Comment
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I need the schematics of the laptop acer aspire 2920z 07227-5 CALADO MB 48.4X401.051 -
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Hi,
I have an acer aspire 5 a515-51 that turns on but has a black screen.
This laptop has the same symptoms as https://www.badcaps.net/forum/showth...er+aspire+a515, however mine is a different model Acer Aspire A515-51 (without the 'G'). There is no onboard ram on this laptop.
Description of the problem is the same: I press the power button, the fan spins for a few seconds and then stops, the computer stays on all the time (led blue), the cpu and gpu are lukewarm. If I leave the pc on for a few minutes the fan starts...
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