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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Samsung > Samsung Hardware Repair

Samsung Hardware Repair Post here your Hardware Repairing Hints or Problems with Samsung Phones.

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Old 01-20-2018, 17:38   #1 (permalink)
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Samsung S6 CPU short


Hi all , I have an S6 that has had a pmic change and now there are 2-3 lines to CPU that are shorted , no shorts at any local components near the pmic apart from the large inductors .

Anyone come across this on pmic replacements....

There was a vbat short that's been removed now by removing pmic (original)

Any advice is most welcomed.

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Old 01-20-2018, 21:32   #2 (permalink)
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What is the components that have a hot temperature change them
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Old 01-21-2018, 13:28   #3 (permalink)
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The components that show short are:
L7009 - VDD_INT_AP

L7002
L7003 ---------VDD_ATLAS_AP SIDE
L7005

I removed all comps on the VDD_into_AP line and the short stays. This goes back to CPU area surrounded by ground pins .

The heat on the pmic pull was 320 C @50% 40 Secs , kapton protecting surrounding areas .

Funny thing is , I have another which has no work done with same fault reading on same components....

Will post pics of the area later showing the clean pull ..



Regard dee

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Old 01-21-2018, 17:42   #4 (permalink)
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Shorted components in yellow go back to CPU , removed one lot of components on the top single component and still short back to CPU...

Clean removal.



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Old 01-22-2018, 03:23   #5 (permalink)
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Hi all ,



After having a good think about these shorts im into thinking that they are maybe low resistance lines on th ecpu gpu etc, like the pp_gpu in the iphone measures 0v / 35ohms approx i think.



As the same fault seems to be on the donor test board I think im safe in saying the cpu isnt shorted.



30 ohms over say 1.0 volt = 0.03333 amps so I doubt they are shorts. Got caught up in diode mode, always used ohms before for years on larger circuits..





Thanks and any more info is most welcomed


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