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02-09-2013, 22:13 | #1 (permalink) |
Junior Member Join Date: Dec 2010
Posts: 21
Member: 1469561 Status: Offline Thanks Meter: 6 | I9100G not charging (after water damage repair) 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! |
The Following User Says Thank You to ElectroKid For This Useful Post: |
02-14-2013, 20:21 | #2 (permalink) |
Junior Member Join Date: Dec 2010
Posts: 21
Member: 1469561 Status: Offline Thanks Meter: 6 | 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. |
The Following User Says Thank You to ElectroKid For This Useful Post: |
02-18-2013, 12:29 | #3 (permalink) |
Junior Member Join Date: Dec 2010
Posts: 21
Member: 1469561 Status: Offline Thanks Meter: 6 | 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): |
The Following User Says Thank You to ElectroKid For This Useful Post: |
03-06-2013, 10:46 | #4 (permalink) | |
Major Poster Join Date: Jan 2013
Posts: 48
Member: 1872587 Status: Offline Thanks Meter: 4 | Quote:
I cannot find reference to U503 for ON or charging. Only reference is for camera or OTG ??? Unless you mean 501 ic | |
03-06-2013, 11:47 | #5 (permalink) | |
Junior Member Join Date: Dec 2010
Posts: 21
Member: 1469561 Status: Offline Thanks Meter: 6 | Quote:
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 | |
03-06-2013, 16:41 | #6 (permalink) |
Major Poster Join Date: Jan 2013
Posts: 48
Member: 1872587 Status: Offline Thanks Meter: 4 | 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. |
03-07-2013, 10:58 | #7 (permalink) | |
Junior Member Join Date: Dec 2010
Posts: 21
Member: 1469561 Status: Offline Thanks Meter: 6 | Quote:
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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