Mr Wites

[rogerboogie]

hi bro i reallly apreciate your job and experience, good to have people who likes to investigate and develop solutions

i like too

recently i have a problem and have some doubts

i was reballing the audio compiler ic i was fixed about 5 or 6 pieces by this method

recently i reball the ic , i have to add 3 balls by hand , cause i dont have especific reball stencil, i dont heat up more than 150 c the audio complier

but after reflow de ic, and try , phone when dialing put in handsfree mode by default and no audio

this happen to me in last 2 phones but this time i have not used preheater on board

Q: do you think that i am need to use preheater to avoid apply to much heat on the board to heat the solder on board and also on ic complier like i used in last 6 ones i was repaired

what is your experience using preheater

thanks for your ponit oif view

[Wites OM Tesla]

Originally Posted by rogerboogie

hi bro i reallly apreciate your job and experience, good to have people who likes to investigate and develop solutions

i like too

recently i have a problem and have some doubts

i was reballing the audio compiler ic i was fixed about 5 or 6 pieces by this method

recently i reball the ic , i have to add 3 balls by hand , cause i dont have especific reball stencil, i dont heat up more than 150 c the audio complier

but after reflow de ic, and try , phone when dialing put in handsfree mode by default and no audio

this happen to me in last 2 phones but this time i have not used preheater on board

Q: do you think that i am need to use preheater to avoid apply to much heat on the board to heat the solder on board and also on ic complier like i used in last 6 ones i was repaired

what is your experience using preheater

thanks for your ponit oif view

Hi friend
Sometime if temp is too low there are solder balls that connect to gnd they melt harder possible you need to rise a little the heat or to wait more,but i have other method i give less heat and use solder iron on gnd near this ic so it melt without giving too much heat,this mean that board is heated with solder iron.
Other thing you need protect CPU from too much heat,also some new ic could be defective this why some work but some not work.

[rogerboogie]

Thanks a lot for answer i will try to use preheater this time and post reaults, also i will try your techinque of using solder iron on gnd ,

In other hand i saw a method posted by you of universal reball technique, i try buy i cannot do pyrimids with good large, which temp u used in iron solder

And which kind of solder are you using

Thanks a lot for info my friend

[Wites OM Tesla]

Originally Posted by rogerboogie

Thanks a lot for answer i will try to use preheater this time and post reaults, also i will try your techinque of using solder iron on gnd ,

In other hand i saw a method posted by you of universal reball technique, i try buy i cannot do pyrimids with good large, which temp u used in iron solder

And which kind of solder are you using

Thanks a lot for info my friend

I give to solder iron 300C of heat for pyramids make,and use solder wire with flux.

[yaaz]

hello brother...,

i thing ur problome as same audio ic ,remove and re ball again ,may be dry solder or legs not fixing well...****er meching temp depending models,if u chech any damage board any spare re fixing then change ur mechine temp,then do ur work properly....i thing ur win to ur work..insh*****...

[rogerboogie]

problem solved by changing the audio compiler and using preheater to put again

seems this component dont tolerate to much hot, or maybe was shorted by the first time


thanks for ideas and your experience


in other hand i have another iphone 4 with audio problems but this is totaly without any sound


handsfree not work
ipod music return to the first menu after try to play
mic not work
also the handsfree its not detected on jack 3.5


i think this time is the audio codec ic, am i right ?

also i think i can use from iphone 3gs its same size , am i correct or its bad idea ?

thanks in advance

[Wites OM Tesla]

Originally Posted by rogerboogie

problem solved by changing the audio compiler and using preheater to put again

seems this component dont tolerate to much hot, or maybe was shorted by the first time


thanks for ideas and your experience


in other hand i have another iphone 4 with audio problems but this is totaly without any sound


handsfree not work
ipod music return to the first menu after try to play
mic not work
also the handsfree its not detected on jack 3.5


i think this time is the audio codec ic, am i right ?

also i think i can use from iphone 3gs its same size , am i correct or its bad idea ?

thanks in advance

Yes this U60 problem try reball or replace from 3gs same audio ic.