how to remove HS0F ic chips

[craig6928]

can anyone give me information on how to remove a HS0F chip of a western digital hard drive.
the motor ic is damaged.
been looking into removing it but not had any luck or what type of equipment to buy to remove them.

people that dont know about this ic is that the chip is double soldered between the circuit board.
small holes under side and hot solder is pour into them.

you can not remove them the normal way or with a hot blower.

been looking into buying a bga remover but again not found one that will work.


thanks for any information guys

[Doomer]

you can not remove them the normal way or with a hot blower.

hmmm
I think it's possible

[dobrevjetser]

yes, i remove them with hot air.
Offcourse should be powerfull enough.

Dobre

[craig6928]

yes you can remove them with hot air
but it can allso damage the ic

but how do you resolder the new ic back on
as there no solder points under the circuit board.
only small holes where the solder flows into.

[dick]

yes you can remove them with hot air
but it can allso damage the ic

but how do you resolder the new ic back on
as there no solder points under the circuit board.
only small holes where the solder flows into.

Hiya, Yes it can be done with basic tools but I would have to say its not easy and takes a lot of practice & skill!

Heating both sides of the board at the same time will help with the removal. Once the chip has been removed the board has to be prepared. This is one of the most important steps because if you get it wrong then nothing is going to make it work!

You need to clean up and then re-ball the grid. So you go over each solder point one by one to get them clean and level. Then you would apply a sticky flux and with tweezers etc place a solder ball on each grid contact. Then you would gently flow hot air over the grid to flow the solder balls. An inspection and clean up and the board is ready for the replacement chip.

Some people use infra red equipment and others chance it with hot air to re-solder the chip.
It would be a very good idea to apply controlled heat to the other side of the board at the same time. The biggest skill is in applying just the right amount of heat.

Unless you are operating in an industrial envornment this or a similar proceedure is what might be used.

In the past I have seen great pictures of some Russian guys with home made infrared soldering equipment. Would love to see them again if somebody has them or can post a link.

[Doomer]

dick, like this? - http://www.rom.by/forum/Samodelnaja_IK_ ... _stantsija
Author claims it costs less than $200

[thatdellguy]

I replaced one with a cheap common household appliance once...No special tools required...