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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 02-09-2013, 22:13   #1 (permalink)
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I9100G not charging (after water damage repair)


Hi all,

First, I'd like to thank krish neupane and thevolatile1 for their help on dead I9100 repair

I replaced cracked U503 (ordered MAX8627ETD+) which caused short circuit (14 Ohms across C565) - didn't need to replace anything else and phone got back to life, all is working except:
When phone is shut and charger connected a yellow triangle and battery with a diagonal line through it appears there's no charging and no green amount of charge is displayed (just a geryish battery).
Also, when phone is running and I connect a charger, a message pops with "Battery Disconnected" and not charging at all.

link to I9100 schematic

link to I9100 service manual

I need some help on how to proceed from here: I was thinking replacing U504 'Linear Battery Charger' (ordered MAX8922LETB+) but not sure if it was affected by the water damage...
Maybe the circuit around U503 is still causing this?
Maybe micro USB connector issue?
Maybe it is a software issue?
What do you suggest?

Thanks!
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Old 02-14-2013, 20:21   #2 (permalink)
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checked V_Bus_5V and BATT pins - OK
Q500 FET is OK - I checked U504 pin 6 is toggled when connecting the charger.
replaced U504 (charging IC) and same problem (Battery Disconnected when plugging charger and not charging).

any suggestions what to check please?

Last edited by ElectroKid; 02-14-2013 at 20:27.
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Old 02-18-2013, 12:29   #3 (permalink)
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there are some different layouts in I9100..
Do you have the layouts pdf other than what's in the service manual?
Can you tell the value/type of Q500 FET, D501
I have other resistors (2 small 1 bigger) above L508 - I can't tell what circuit they belong to (and they do not appear here):
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Old 03-06-2013, 10:46   #4 (permalink)
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Quote:
Originally Posted by ElectroKid View Post
Hi all,

First, I'd like to thank krish neupane and thevolatile1 for their help on dead I9100 repair

I replaced cracked U503 (ordered MAX8627ETD+) which caused short circuit (14 Ohms across C565) - didn't need to replace anything else and phone got back to life, all is working except:
When phone is shut and charger connected a yellow triangle and battery with a diagonal line through it appears there's no charging and no green amount of charge is displayed (just a geryish battery).
Also, when phone is running and I connect a charger, a message pops with "Battery Disconnected" and not charging at all.

link to I9100 schematic

link to I9100 service manual

I need some help on how to proceed from here: I was thinking replacing U504 'Linear Battery Charger' (ordered MAX8922LETB+) but not sure if it was affected by the water damage...
Maybe the circuit around U503 is still causing this?
Maybe micro USB connector issue?
Maybe it is a software issue?
What do you suggest?

Thanks!

I cannot find reference to U503 for ON or charging. Only reference is for camera or OTG ???
Unless you mean 501 ic
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Old 03-06-2013, 11:47   #5 (permalink)
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Quote:
Originally Posted by cdicky View Post
I cannot find reference to U503 for ON or charging. Only reference is for camera or OTG ???
Unless you mean 501 ic
you are right, but since the original no-power issue was fixed replacing U503, I'm looking to find more affected components near it...
Still didn't fix this "Battery Disconnected" pop-up and no-charging issue...I cannot replace PMIC U501 since it's a delicate BGA package
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Old 03-06-2013, 16:41   #6 (permalink)
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I know what you mean. Far too small.
Who did you order the 503 from? UK?
Was it easy to replace.

I have two S2 boards dead as a post.
Also two S3 boards- same. Dop they share the same 503 I wonder.
If so might be worth buying a few.
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Old 03-07-2013, 10:58   #7 (permalink)
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Quote:
Originally Posted by cdicky View Post
I know what you mean. Far too small.
Who did you order the 503 from? UK?
Was it easy to replace.

I have two S2 boards dead as a post.
Also two S3 boards- same. Dop they share the same 503 I wonder.
If so might be worth buying a few.
I ordered free samples of U503 thru Maxim-IC site (their office is in Ireland).
4 days and got it super fast (it departed from China).
As far as reworking, I decided to use heat gun (careful with hot temps) both to remove and assemble faulty and new ICs and bam! got back to work (all but charging).
I hope that with your dead units the solution will involve only U503.
Please keep postin' on outcomes.
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Old 09-28-2013, 13:05   #8 (permalink)
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Samsung Battery Disconnected when you plug phone in to charge


Now No Solution

help??????????????????????????????????????
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Old 01-26-2014, 20:33   #9 (permalink)
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Unhappy "Battery Disconnected - older post

still waiting for suggestions how to fix...
no one had this issue ??
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Old 02-05-2014, 20:42   #10 (permalink)
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any info on "Battery Disconnected" issue please?
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Old 06-09-2016, 16:43   #11 (permalink)
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any info on "Battery Disconnected" issue please?

please help
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