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| iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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03-26-2013, 09:01
| #1 (permalink) |
| Crazy Poster  Join Date: Dec 2010 Location: New Zealand
Posts: 52
Member: 1478516 Status: Offline Thanks Meter: 5 | iPhone 4s Damaged Filter IC U21_RF Where would one get this crucial part for iPhone 4s otherwise know as U21_RF and yes I have googled and googled some more another case of a DIY gone wrong from a client many thanks |
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03-29-2015, 19:38
| #6 (permalink) | |
| Freak Poster Join Date: Dec 2014 Location: Northampton, UK Age: 42
Posts: 142
Member: 2312017 Status: Offline Thanks Meter: 19 | Quote:
I have a phone 4s here that i just tried this with for all of you wondering, No service and weak signal with missing u21_rf and c46 rf. Replaced c46 rf and jump pin 2 to 4 and now have 3 bars reception/signal. Can confirm this does work, however I now have a new problem, the screen flickers a little but only on certain screens and i can only assume this is because of the jumper in place or because something needs to be done to ground pins 1 and 3 of u21 rf but i am without the electrical knowledge to confirm either way. | |
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03-29-2015, 20:42
| #7 (permalink) |
| No Life Poster   Join Date: Mar 2012 Location: cambridgeshire, England Age: 55
Posts: 760
Member: 1728699 Status: Offline Thanks Meter: 212  | Pins 1 and 3, just leave. The screen flickering is a separate issue, maybe lcd and touch connectors need cleaning or resolder. |
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| The Following 2 Users Say Thank You to dog68 For This Useful Post: |
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04-03-2015, 14:47
| #8 (permalink) |
| Freak Poster Join Date: Dec 2014 Location: Northampton, UK Age: 42
Posts: 142
Member: 2312017 Status: Offline Thanks Meter: 19 | Nice one, thanked Although i already cleaned the board, i stripped and did again but still suffered slight flicker but only in certain menu screens, this however sorted itself out after another restore. On a side note i went to sleep and the phone was left unchecked until morning and to my surprise was working fine, i have now replace the component and all is well. Thank you |
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| The Following User Says Thank You to NickTheGeek For This Useful Post: |
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