Technical Support CPU reballing in Airbook

[Tara Laptops]

Hi, nowadays everything is in one CPU. Many times I have to reball the CPU. No success. Mainly in Airbook. It bends on both sides. Very big problem. I have ZM-R5860.. Anybody have any perfect solution or procedure to reball it .pls share. Thanks

 

[Hosein Asadolahi]

Hi, nowadays everything is in one CPU. Many times I have to reball the CPU. No success. Mainly in Airbook. It bends on both sides. Very big problem. I have ZM-R5860.. Anybody have any perfect solution or procedure to reball it .pls share. Thanks

how to reball the cpu ? with hotgun or oven .

 

[Tara Laptops]

i have Seamark ZM-R5860N

 

[Tara Laptops]

When i reball the cpu 4th gen and above mainly in airbook A1466 the cpu bends upward on both ends

 

[Tara Laptops]

Hello, is there anyone who has sucessfully reballed 4th gen and above cpu mainly in airbook. If possible pls make a video of it and post it in the group. Even if chargable fine. Thanks

 

[Patrick Ribbsaeter]

Hello, is there anyone who has successfully rebelled 4th gen and above CPU mainly in air book? If possible pls make a video of it and post it in the group. Even if chargeable fine. Thanks

There are many videos on Youtube.. U haven't checked? Why do u think CPU is the problem always? Ive had my computer shop 4 years and 1-2 had CPU issues of thousands of repairs. I don't understand why people always blame the CPU first. And what heat do you use for reballing and how long do you reball 5min, 10 min? And why do u think it's the CPU, how did u come to that conclusion?

 

[Tara Laptops]

I have tried in airbook A1466 atleast 3 times. My machine is ZM-R5860N. Normally in pch we heat it upto 240 degree celcius. Same we do for cpu. The result is cpu bend on both sides. It moves upward on both sides. I use normal leaded balls. Atleast 7to 8 motherboard work is pending.

 

[Patrick Ribbsaeter]

Ok..

I ask this. Why do you think it's the CPU? How did u come to that conclusion? Please describe? What's the reason u want to reball CPU.. ? To me it sounds like you're guessing instead of doing proper troubleshooting.

 

[Tara Laptops]

The cpu for example in one case is getting very hot and draws full 5amps

 

[Tara Laptops]

even if i apply 1v at coil it draws very high current.

 

[Patrick Ribbsaeter]

That doesn't mean it's the CPU... You going to fast in the troubleshooting process.. That's a common beginner mistake.. Slow down and do proper troubleshooting and research.. have youI tried to put some rosin core or alcohol on some other components, do you have a Heatcamera..

Its not the CPU. slow down and troubleshoot the short first.

1. U can desolder the Coils to the CPU and also other coils. and then take diode mode on each side of the coil. That way u will know if the issue is on CPU side or other places. Its better you do this way, then start reballing and creating more problem that don't exist.

The best way is to use heat camera, inject 1v, and 5 amp on DC supply.... and feel around on the board for other HOT components. you can disconnect the coils to the CPU.. Its better you try small adjustments step by step slowly

 

[Tara Laptops]

yes i removed the coil and then injected 1v on both sides. cpu get hot. not any capacitors.

 

[Hosein Asadolahi]

yes i removed the coil and then injected 1v on both sides. cpu get hot. not any capacitors.

why you wont reballing when cpu have problem . you must change it with new one .

 

[Tara Laptops]

My problem is new or reballed the cpu bends upwards on both sides in airbook mainly. I want balling perfect result. If U have proper video pls post. I will be highly obliged. Thanks

 

[laup]

That doesn't mean it's the CPU... You going to fast in the troubleshooting process.. That's a common beginner mistake.. Slow down and do proper troubleshooting and research.. have youI tried to put some rosin core or alcohol on some other components, do you have a Heatcamera..

Its not the CPU. slow down and troubleshoot the short first.

1. U can desolder the Coils to the CPU and also other coils. and then take diode mode on each side of the coil. That way u will know if the issue is on CPU side or other places. Its better you do this way, then start reballing and creating more problem that don't exist.

The best way is to use heat camera, inject 1v, and 5 amp on DC supply.... and feel around on the board for other HOT components. you can disconnect the coils to the CPU.. Its better you try small adjustments step by step slowly

Nice piece of advice there

I was always sketchy of injecting voltage on lower rails

Never thought to just remove cpu coils lol ffs

 

[laup]

My problem is new or reballed the cpu bends upwards on both sides in airbook mainly. I want balling perfect result. If U have proper video pls post. I will be highly obliged. Thanks

I've reballed many cpus

Never had issue with warping?

U talking about dh stencil warping or the actual chip?

 

[Tara Laptops]

the chip bends upward on both opposite sides. my friend says it has to be the problem with my bga machine.

 

[laup]

yes your top side is way too hot then,

On my honton 3 teir air system i used 300/320c bottom air nozzle and maybe 190/210c MAX TOP HEATER

pre heater is 280 however the boards are quite high from the pre heater, so i would advise going that high