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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone, iPad, iPod Hardware Repair


iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides.

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Old 05-19-2017, 18:06   #1 (permalink)
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Check voltage


Please how do I know the voltage of this cap in this picture

I don't thinks it 6.3 in the pic ...each time I measure even with a new phone I don't get the 6.3


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Old 05-19-2017, 18:40   #2 (permalink)
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On the picture is nominal voltage for the cap. The cap is made for 6.3V if you put over 6.3v to the cap can be destroyed..

C1640 is the number capacitor on the board or schematic 4.7uF 20% 6.3V is the manufacture data.

C1640 is for the PP_SPKAMP_FILT line probably filter.
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Old 05-19-2017, 21:10   #3 (permalink)
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What is the volt I need to get if it's good or how do u know??


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Old 05-19-2017, 21:11   #4 (permalink)
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Any reading to know if the cap is shot??


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Old 05-19-2017, 21:27   #5 (permalink)
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what is your issue no sound i guess only headset no speaker ??
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Old 05-19-2017, 21:29   #6 (permalink)
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No problem...am just practicing


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Old 05-19-2017, 21:31   #7 (permalink)
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I just want to know what am doing


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Old 05-19-2017, 21:40   #8 (permalink)
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look on schematic for PP_SPKAMP_FILT so you get page 26 =======> 1.8 VOLT
and page 16 you get V=1.0
so you can have 1.0 -1.8 ( not sure i do this only as hobby)
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Old 05-19-2017, 21:42   #9 (permalink)
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Thanks boss


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Old 05-19-2017, 21:42   #10 (permalink)
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for practice best way i my opinion is diode mode resistance they are no chance to do a short with your prob and risque to damage the board
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Old 05-19-2017, 21:45   #11 (permalink)
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If it's below this volts that's means it's bad


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Old 05-20-2017, 05:39   #12 (permalink)
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Check voltage

To know the voltage of a cap ..I need to know the ic line the cap is connected to and use the name to check volts in voltage properties??


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