I desoldered this chip because have short on 1.2v and 3v rails. Need to check this short to check if is chip ok or is fried. Did anybody know what pins to check?
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Re: g86-703-a2 pinout needed
As far as I know...There's no way to check if the chip is bad...Heard if you check resistance across all caps on the chip & don't have resistance, it's fried(of course after desoldered & cleaned)...
But not sure... -
Re: g86-703-a2 pinout needed
on vga mxm you have 4 coil named L1 L2 L3 L4 ,first check if any of them is shorted.
L4 is for: FBVDDQ SWITCHER POWER SUPPLY
L1 L2 L3 are for NVVDD SWITCHER POWER SUPPLY
on fpa there are many pin to check:
i have a G86 schematic p419 (should be g86-630-a2)
FB_VTT W19
FB_VTT U19
FB_VTT R19
FB_VTT N19
FB_VTT L19
FB_VTT J18
FB_VTT J17
FB_VTT F16
FB_VTT F15
FB_VDDQ Y22
FB_VDDQ U22
FB_VDDQ P22
FB_VDDQ L22
FB_VDDQ J22
FB_VDDQ T19
FB_VDDQ M19
FB_VDDQ J19
FB_VDDQ F19
also d15 get power.
f13, h22 are groundLast edited by dellxps15; 05-19-2014, 08:45 AM.Comment
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Re: g86-703-a2 pinout needed
guys, im wrote that chip is desoldered. i need to check resistance on 1,2v and 3v on the chip. im not familiar with finding the right pins right on the chip so help will be needed. maybe enybody have some picture of pinout with some legend to be sureComment
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Re: g86-703-a2 pinout needed
each bga start with a letter and number. fisrt ball is a1 , down there is b1, and so on. referring to your bga socket, i give you letter and number position of voltage and ground.
(because bga is desoldered you have to look at that location inverted.
like in the picture, but for bga they are inverted.http://4.bp.blogspot.com/_lAb8NkC80k...definition.jpg
example: A1 is upper right, a30 is upper left. looking at removed bga.Last edited by dellxps15; 05-20-2014, 03:52 AM.Comment
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Re: g86-703-a2 pinout needed
thats exactly what im looking for.
Big thanks.Comment
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