Just Recently, REWA Academy pupils gave responses that the 2 layers usually fall short to fit carefully in double-stacked motherboard repair There are even huge voids, causing quasi soldering In feedback, we will share suggestions and notes when dividing and also recombining double-stacked motherboard Peel off foam on the motherboard before heating Please be kept in mind that we do not advise newbies to warm the motherboard with a hot air weapon Because the motherboard may get warmth unevenly and also warp An expert motherboard heating system is what we suggest To assist in later on removal of the reasoning board, drive a screw on the reasoning board Cut via the tape with a Sculpture Knife The logic board and also center layer are soldered with low-temperature solder paste So the ideal temperature for the home heating system will be 155 ° C-165 ° C Push the logic board carefully with tweezers when the temperature gets to 165 ° C If the logic board hangs, the tin has melted Clamp the screw to get rid of the logic board Get rid of the signal board Eliminate thermal grease with a Sculpture Blade Thermal oil need to be eliminated totally Otherwise, the thermal grease will certainly touch the reasoning board to generate pseudo soldering in recombination Attach the signal board to the owner Use a round of Paste Flux Get rid of tin on the bonding pad with Blowpipe at 365 ° C and Solder Wick Tin on the bonding pad have to be entirely gotten rid of The recurring tin will impact the succeeding soldering Clean the bonding pad with PCB Cleaner Clean the reasoning board with the very same method Please do not damage elements around the bonding pad of the logic board while cleaning It is necessary to inspect if the bonding pad is cool after cleaning up Attach the signal board to the Reballing Platform Placed the reballing pattern ready to see to it that it is pushing versus the signal board To avoid the solder paste from streaming right into the motherboard gap, insert a metal plate Use a layer of low-temperature Solder Paste Wipe off excess solder paste with a Lint-free Wipe Get rid of the reballing pattern Inspect if solder paste on the signal board is complete While using solder paste, please ensure that solder paste need to have a certain humidity If the solder paste is also completely dry, it will certainly follow the reballing stencil when the stencil is gotten rid of As a result, the solder paste on the signal board will not be consistent, which can quickly cause bad soldering Placed the signal board on the 165 ° C Home heating System to warmth Quit heating after the solder balls are developed Apply a tiny quantity of Paste Change after the signal board has actually cooled Align the logic board with the signal board Maintain heating on the 165 ° C Heating Platform When the solder change spills and logic board sinks, push the logic board gently with tweezers to guarantee the two layers fit closely The nudge should be gentle and tiny Tidy the motherboard with PCB Cleaner after the motherboard has cooled If you locate the motherboard flawed while recombining, you can put the motherboard on a flat board and secure it with an elastic band Press 2 sides of the motherboard delicately To avoid squashing parts, please place a soft paper under the motherboard Next, we will certainly share an additional recombination method The approach can be taken if the middle bonding pad is not harmed When the tin melts, remove the reasoning board in a vertical way with tweezers It can be seen that there is a metal pad of 0.05 mm thickness around the signal board at a certain range This metal pad is designed to maintain a 0.05 mm space in between the reasoning board and the middle layer, preventing the solder balls from linking while soldering You only require to eliminate thermal grease on the motherboard when the repair service is done Keep original tin on the bonding pad Apply a percentage of Paste Flux Lastly, line up the logic board with the signal board When the temperature reaches 165 ° C and the tin melts, turn the power off Press two ends of the logic board with tweezers till the motherboard has cooled down The reasoning board as well as the signal board fit carefully by doing this There will be no connecting and solder spheres spillover Visit REWA Academy if you wish to discover even more repair work skills We have total course packages for motherboard medical diagnosis and also repair capacity improvement Click the link in the remark area to buy motherboard repair service program packages Thanks for watching as well as feel cost-free to leave a comment
