Why does reflow work

The modern solder reflow oven use the concepts of radiation and convection combined. The heat will transfer to a heat regulator first to make heat output even. A convection fan will blow the hot air to an inner chamber. The target PCB can will get heat consistency in any spot. Slumping type How to optimize the reflow profile? How to Maintain a Reflow Oven? The oven method however looks interesting and more controlled! Thing is, and I'm a computer noob in a way I have the lappy stripped right down, the motherboard is bare of all wires, comeponents etc basically anything that could come off is off Anyway, what about all those connection points, the docks for the RAM etc, they look like plastic, or a material that'd melt when put in high temps?!

Should I be concerned about this, or will it be fine? Do I have to cover anything before a pip it in the oven, and, more importantly, will it stink out the oven?! Many thanks for any help guys!! There was some black plastic that started to peel up, but it was unnecessary. I didn't see any bulging capacitors. My kitchen smelled like solder, so I guess it was hot enough. Pete: My motherboard with all of the RAM slots ect survived the oven. I think the most difficult part of the process was reassembling the laptop.

The oven and kitchen smelled like solder bad , but it went away pretty fast. I can't guarantee that the oven will work for you, since I'm amazed it worked for me. But as frozenlead said, you can't do any harm to it.

Thanks for the quick reply dougx! I'm going to give the oven method a go, as you say, I have nothing to lose really. However, I'm a little concerned after doing further reading that reflowing isnt a long term solution and may only last a couple of months! Bloody HP's, last time I'll be buying from them! Jan 2, 1 0 18, 0. My laptop motherboard had stuff on both sides, so there was really no distinction for me.

I left it in the oven for 8 minutes, then I opened the door to let it cool slowly. Put it in last night c f for 8mins, have to get a new thermal pad for the processor now and hopefully get her back together and se if she works by this evening. Good news!! Reassembled laptop had a couple of screws left over anyway, nervously flipped her over, inserted power cable, hit power button, and Bad news!! The speakers seem to be making this constant loud cracking sound, even if I plug in headphones, put the sound on mute it still makes it.

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Started by hodzic Oct 24, Replies: 4. Tom's Guide is part of Future plc, an international media group and leading digital publisher. Visit our corporate site. All rights reserved. During this stage, we turn off the heat and waiting for the temperature to get decrease for making the liquid solder joint hard rock.

The size of solder grain can also depend on the drop rate of temperature and normally it will cool down as quickly as possible. How to fix a laptop GPU by reflow graphic chip? Friday, November 12, Share on Facebook. Gen 2 vs. Gen 3 vs. We use Ersa Hotflow ovens. These are long convection ovens with many heating zones that together create a soldering cycle. Each heating zone of the oven has a regulated temperature set to the solder profiles for the assembly process. Multiple segments help to get an optimised heat transfer and minimum temperature differences between different points on the PCBA.

The solder profile is influenced by the number of layers in the PCB, the copper distribution on the board, the number and size of components. Overheating components can damage them. The Temperature gradient is important because too quick changes of temperature can cause damage to components. During the thermal soak the flux is activated to reduce oxidation of pads and leads of components and improve wetting.

The component that has the lowest maximum temperature allowance will define the maximum temperature.