Just Recently, REWA Academy trainees offered comments that both layers usually fail to fit very closely in double-stacked motherboard repair There are even huge gaps, triggering pseudo soldering In response, we will share pointers and notes when dividing and recombining double-stacked motherboard Remove foam on the motherboard prior to home heating Please be kept in mind that we do not suggest novices to heat the motherboard with a warm air gun Since the motherboard might get warmth unevenly and warp An expert motherboard home heating system is what we recommend To assist in later removal of the logic board, drive a screw on the logic board Puncture the tape with a Sculpture Blade The reasoning board and center layer are soldered with low-temperature solder paste So the most effective temperature for the home heating system will certainly be 155 ° C-165 ° C Press the logic board gently with tweezers when the temperature gets to 165 ° C If the reasoning board is loose, the tin has actually melted Clamp the screw to remove the logic board Get rid of the signal board Eliminate thermal grease with a Sculpture Knife Thermal grease need to be removed totally Or else, the thermal oil will certainly touch the reasoning board to trigger pseudo soldering in recombination Affix the signal board to the holder Use a round of Paste Flux Remove tin on the bonding pad with Welding torch at 365 ° C and Solder Wick Tin on the bonding pad have to be completely eliminated The recurring tin will certainly affect the succeeding soldering Clean the bonding pad with PCB Cleaner Clean the logic board with the very same method Please do not damage components around the bonding pad of the logic board while cleansing It is essential to inspect if the bonding pad is neat after cleansing Connect the signal board to the Reballing System Placed the reballing pattern in position to ensure that it is pushing versus the signal board To stop the solder paste from streaming right into the motherboard void, place a steel plate Apply a layer of low-temperature Solder Paste Rub out excess solder paste with a Lint-free Wipe Get rid of the reballing stencil Check if solder paste on the signal board is complete While applying solder paste, please make certain that solder paste must have a certain moisture If the solder paste is too completely dry, it will certainly abide by the reballing stencil when the pattern is eliminated Because of this, the solder paste on the signal board will certainly not be consistent, which can easily bring about inadequate soldering Put the signal board on the 165 ° C Heating System to warmth Quit heating after the solder balls are developed Apply a little amount of Paste Change after the signal board has cooled down Align the logic board with the signal board Keep home heating on the 165 ° C Heating Platform When the solder change spills and logic board sinks, push the reasoning board gently with tweezers to guarantee the two layers fit very closely The push needs to be mild and tiny Tidy the motherboard with PCB Cleaner after the motherboard has actually cooled down If you find the motherboard flawed while recombining, you can put the motherboard on a flat board and attach it with an elastic band Press 2 sides of the motherboard carefully To avoid squashing parts, please put a soft paper under the motherboard Next, we will share an additional recombination method The technique can be taken if the center bonding pad is not harmed When the tin thaws, get rid of the logic board in an upright fashion 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 created to keep a 0.05 mm space in between the logic board and the middle layer, avoiding the solder balls from linking while soldering You only need to eliminate thermal grease on the motherboard when the repair work is done Maintain initial tin on the bonding pad Use a percentage of Paste Change Last but not least, line up the reasoning board with the signal board When the temperature reaches 165 ° C and the tin melts, transform the power off Press two ends of the reasoning board with tweezers until the motherboard has cooled down The reasoning board and the signal board fit very closely this way There will certainly be no connecting and solder rounds spillover See REWA Academy if you desire to find out more fixing skills We have complete training course packages for motherboard medical diagnosis and repair service capacity enhancement Click the link in the comment area to purchase motherboard repair work program plans Thanks for seeing and really feel cost-free to leave a remark
