iphone 4 checked every thing but no service - Page 2 - GSM-Forum

Apple User · 05-21-2012, 21:53

no voltage on R500_RF but on working phone R500_RF has 2.85V

**Wites OM Tesla** · 05-21-2012, 22:01

Quote:

Originally Posted by Apple User

no voltage on R500_RF but on working phone R500_RF has 2.85V

Check for beep this resistor if ok then voltage not come from U11_RF or BB CPU not know for sure,you only reball U11_RF try replace it maybe solve.

Apple User · 05-21-2012, 22:10

beep ok and replace U11_RF but same
and reball baseband cpu but same
i dubt to U8_RF

**Wites OM Tesla** · 05-21-2012, 23:30

Quote:

Originally Posted by Apple User

beep ok and replace U11_RF but same
and reball baseband cpu but same
i dubt to U8_RF

Ok friend try replace U8_RF but before reball PMIC.
Is the antenna itself ok did you try other?

Apple User · 08-20-2012, 08:50

sorry i forgot this post problem solved by changing u11_rf

oblio · 09-16-2012, 23:27

Same here, checked/changed almost everything in RF/BB area, problem was because U11_RF, after changing it I have full signal

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05-21-2012, 21:53	#16 (permalink)
Apple User Freak Poster Join Date: Jan 2012 Posts: 155 Member: 1711751 Status: Offline Thanks: 27 Thanked 9 Times in 8 Posts	no voltage on R500_RF but on working phone R500_RF has 2.85V

05-21-2012, 22:10	#18 (permalink)
Apple User Freak Poster Join Date: Jan 2012 Posts: 155 Member: 1711751 Status: Offline Thanks: 27 Thanked 9 Times in 8 Posts	beep ok and replace U11_RF but same and reball baseband cpu but same i dubt to U8_RF

08-20-2012, 08:50	#20 (permalink)
Apple User Freak Poster Join Date: Jan 2012 Posts: 155 Member: 1711751 Status: Offline Thanks: 27 Thanked 9 Times in 8 Posts	sorry i forgot this post problem solved by changing u11_rf

09-16-2012, 23:27	#21 (permalink)
oblio Freak Poster Join Date: Mar 2004 Location: Romania Age: 37 Posts: 365 Member: 59869 Status: Online Thanks: 23 Thanked 84 Times in 57 Posts	Same here, checked/changed almost everything in RF/BB area, problem was because U11_RF, after changing it I have full signal