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 Post subject: rom chip desolder
PostPosted: October 22nd, 2018, 16:34 
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Joined: October 22nd, 2018, 16:21
Posts: 1
Location: florida
I have a t862 ir station, i am trying to desolder a rom chip from a seagate laptop thin pcb. after several minutes the solder dosent even soften. any ideas on settings or solutions. :?


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 Post subject: Re: rom chip desolder
PostPosted: October 22nd, 2018, 21:21 
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Joined: December 8th, 2010, 11:37
Posts: 580
Location: Ottawa, Canada
The T862 has lousy temperature control -- it's the last thing you want to use to desolder ROM ICs. With many drives, if you over-heat the ROM it's bye-bye to ever recovering the data.

For a more cautious approach, I use a preheater set to 215C and a hot air SMT rework tool (wand), along with flux, to lift the ROM once the circuit board is stabilized at 215C. Lead-free solder used on these boards melts at 217C, so it doesn't take a lot of top heat to free the ROM.

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 Post subject: Re: rom chip desolder
PostPosted: October 23rd, 2018, 8:08 
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Joined: January 8th, 2008, 5:21
Posts: 844
Location: uk
I use an Atten 850b hot air rework station.

Normally I would apply flux to the rom and then apply the hot air for a few seconds until the solder flows and remove the chip.

If the solder is hard and doesn't flow easily I would use a small iron and apply leaded solder to each ic pin. Then using the hot air should allow the solder to flow freely.


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