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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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How to remove the covers from the logicboard?

Hi, I want to clean my hole logicboard. So I disassembled the phone and clamped it in my boardholder to heat up the covers with my YouYue reflow station.

I setup 320°C and after 5 minutes, the fan is really hot. In circular movements, I tried to remove the covers. But nothing happens. In some videos, the covers plop up after some minutes blowing with the fan in circular movements.

Is there any trick to get them off?

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Most of the logic board covers in the iPhone 4 can be removed without heating. They are sort of clamped over a frame which is soldered to the board.

You can use for example fine tweezers with a fine tip to remove the covers off the frame.

This way, you can access most if not all areas on the logic board (except for one small part).

If that's not enough, and you still need to remove a shield (on this or any phone), I think 320°C is too hot and you risk damaging/displacing lots of components and/or damaging the solder underneath some of the major chips.

I would use something like 260 degrees, full air speed, without nozzle, while covering all surrounding areas with polyamide (Kapton) tape. If you've got the hang of it, you can skip the polyamide tape, but I strongly recommend it for starters/newbies.

While heating, have the tip of the tweezers inserted underneath the shield in any opening you can find, while staying away from tiny components under there, and keep a steady but very light pressure (lever up) on the shield, this way once the solder melts, the shield will pop up.

If done well, it should be over in 45 seconds.

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2 Comments:

Thanks Rany! Now it works for me. I bent the frames a little bit but thats not so bad. But I can't remove the big cover on the front with the black "shield" near the docking connector port.

I heat it up and tried to pull it up with my tweezer but I only bend the little teeths. :/

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Practice makes perfect. Also clamp your board down somehow - using a board holder or something to weigh it down. I train on scrap boards first. I recommend you do too.

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