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Archive for the ‘apple’ Category.
Top 22 Mac OS X Products: Part One - Technology News by InformationWeek
Our Apple expert John C. Welch picks 22 lesser-known applications that can make your Mac experience more productive and more fun. Part 1 of 2.
A DIY iBook Dual USB Logic Board Repair - MacNN Forums
I have an iBook with a dodgy graphics chip. iPlay at fixing it. iblog about my adventures.
1. A gradual increase in temperature, of about 1 to 3 deg. up to a temperature of 150 deg C (302 F). Pre-heating is extremely important so boards don’t warp. It may take a minute or even longer to pre-heat…No need to rush it. Flux activation begins at 150 deg. C (302 F)
2. Through the flux activation phase, a slow ramp up of temp. to a peak of about 180 degs. C (356 F) over about 90 seconds. Reflow begins at about 180 degs. C (356 F)
3. A gradual increase during the reflow phase to about 210 degs. C (410 F) for 60 sec.
6. Cooling phase should then begin gradually, not abruptly.
I found a really good graph of the temperature curve here:
www.altera.com/literature/an/an081.pdf
So, as long as the heating is gradual and controlled you should be able to reflow the solder without frying the rest of the board. Yes…the whole board will get quite hot despite masking everything around the video chip. As long as it’s gradual and controlled, you should be OK.
You may also smell the flux as it heats up, which is normal.
Mac disassembly instructions