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PLAYLIST

The Art of Upgrading the Un-Upgradeable: Hacking Apple's Iron Grip on Memory and Storage

Apple's custom silicon has ushered in an era of unprecedented performance, tempting even the most steadfast Windows loyalists to switch to Mac. The initial pricing is often surprisingly competitive, but this allure quickly fades when considering upgrades. Apple's pricing for memory and storage upgrades is notoriously high, a frustration compounded by the fact that these components are soldered directly to the motherboard, preventing users from performing their own upgradesβ€”or so it seems.

This practice of soldering components isn't without its technical merits. For system memory, the proximity to the CPU is crucial for achieving the high-performance levels seen in Apple's latest silicon. The signal degradation from longer pathways and connectors would compromise the speed of the integrated GPU. While other manufacturers might prioritize modularity, Apple has chosen to prioritize cutting-edge performance, a valid engineering decision.

However, the same cannot be said for storage. While Apple's storage architecture integrates the controller directly into the CPU for enhanced hardware-level encryption via the Secure Enclave, there is no significant performance penalty for using modular storage. This is evident in Apple's own designs for the Mac Studio and the M4 Mac Mini, which utilize modular storage cards. The primary reasons for soldering storage in other models appear to be a combination of long-standing habit and, more significantly, a lucrative business model.

But what if these limitations could be bypassed? Enter Colin from the YouTube channel dosdude1, a specialist in the intricate craft of upgrading Macs that Apple deems non-upgradeable. With the right tools and expertise, it is possible to desolder the original storage and replace it with higher-capacity chips.

The process is a delicate dance of precision and technical skill. It requires a specialized toolkit, including a hot air station, a quality soldering iron, solder paste, solder wick, BGA stencils for the NAND chips, an underfill removal tool, and a preheater. While the tools are accessible, the procedure demands a significant amount of practice to avoid damaging the logic board.

The upgrade journey begins with a 256GB M2 MacBook Air, a configuration that presents a unique challenge. Not only is the single NAND chip soldered to the board, but Apple also omits approximately 50 supporting components for a second NAND chip. This means the upgrade involves not just replacing the storage but also meticulously reinstalling these missing components. The necessary NAND chips can be sourced from platforms like AliExpress, while the support components can be found at distributors such as Mouser or DigiKey. Despite these costs, a DIY upgrade, or even one performed by a professional like Colin, can be as much as half the price of Apple's official upgrade.

The procedure itself is a masterclass in micro-soldering. It involves carefully disassembling the MacBook, removing a heat shield without bending it, and then focusing on the NAND chip. The underfill, a material used to secure the chip, must be carefully scraped away after being heated. The chip is then desoldered using a hot air station and a specialized tool to gently lift it from the board.

With the old chip removed, the logic board is prepped for the new storage. This involves cleaning the solder pads, a process made easier by applying leaded solder before wicking away the old lead-free solder. In the case of the 256GB MacBook Air, the missing support components for the second NAND chip must be painstakingly soldered into place, guided by schematics that are not officially provided by Apple but have been acquired through other channels.

The new, higher-capacity NAND chips, which in this case are blank and unprogrammed, are then "reballed." This involves applying fresh solder balls to the chip's contacts using a stencil and solder paste. Once prepared, the new chips are carefully positioned on the logic board and soldered into place with the hot air station. A gentle tap on the chip confirms it has been successfully seated as the molten solder beneath it creates surface tension.

The final step is to restore the Mac's firmware. This is done by putting the Mac into Device Firmware Upgrade (DFU) mode and using another Mac to run the restore process. If the upgrade has been successful, the system will recognize the new, larger storage capacity. In this instance, the 256GB MacBook Air was successfully upgraded to 2TB of storage.

To demonstrate the feasibility of this process for a skilled amateur, the same procedure was attempted on an M4 Mac Mini. The process was similar, involving the removal of the original NAND packages and their replacement with higher-capacity chips. While the physical soldering was successful, an error during the firmware restore indicated an incompatibility with the new NAND chips. Fortunately, with a backup set of 1TB chips, the Mac Mini was still successfully upgraded, highlighting that even for experts, the process is not without its risks, often due to the variability of third-party components.

This exploration into upgrading soldered components underscores a critical point in the right-to-repair movement. While Apple's design choices present significant hurdles, they are not insurmountable. For those with the necessary skills or the willingness to seek out experts, it is possible to bypass these limitations, saving money and extending the life of a device that might otherwise be rendered obsolete by its initial storage constraints. It is a testament to the ingenuity of the repair community in the face of a locked-down hardware ecosystem.

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αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αž•αŸ’αž‘αžΆαž›αŸ‹αžαŸ’αž›αž½αž“αžšαž”αžŸαŸ‹ Apple (Apple Silicon) αž”αžΆαž“αž“αžΆαŸ†αž˜αž€αž“αžΌαžœαžŸαž˜αŸαž™αž€αžΆαž›αž“αŸƒαžαžΆαž˜αž–αž›αž˜αŸ‰αžΆαžŸαŸŠαžΈαž“αžŠαŸαžαŸ’αž›αžΆαŸ†αž„αž€αŸ’αž›αžΆαžŠαŸ‚αž›αž˜αž·αž“αž’αŸ’αž›αžΆαž”αŸ‹αž˜αžΆαž“αž–αžΈαž˜αž»αž“αž˜αž€ αžŠαŸ„αž™αž‘αžΆαž€αŸ‹αž‘αžΆαž‰αžŸαžΌαž˜αŸ’αž”αžΈαžαŸ‚αž’αŸ’αž“αž€αžŠαŸ‚αž›αžŸαŸ’αž˜αŸ„αŸ‡αžŸαŸ’αž˜αŸαž‚αŸ’αžšαž“αžΉαž„ Windows αž”αŸ†αž•αž»αžαž±αŸ’αž™αž”αŸ’αžαžΌαžšαž˜αž€αž”αŸ’αžšαžΎ Mac αžœαž·αž‰αŸ” αžαž˜αŸ’αž›αŸƒαž…αžΆαž”αŸ‹αž•αŸ’αžαžΎαž˜αžŠαŸ†αž”αžΌαž„αžšαž”αžŸαŸ‹αžœαžΆαž…αŸ’αžšαžΎαž“αžαŸ‚αž˜αžΆαž“αž—αžΆαž–αž”αŸ’αžšαž€αž½αžαž”αŸ’αžšαž‡αŸ‚αž„αž‚αž½αžšαž±αŸ’αž™αž—αŸ’αž‰αžΆαž€αŸ‹αž•αŸ’αž’αžΎαž› αž”αŸ‰αž»αž“αŸ’αžαŸ‚αž€αžΆαžšαž‘αžΆαž€αŸ‹αž‘αžΆαž‰αž…αž·αžαŸ’αžαž“αŸαŸ‡αž”αžΆαž“αžšαž›αžΆαž™αž”αžΆαžαŸ‹αž™αŸ‰αžΆαž„αž†αžΆαž”αŸ‹αžšαž αŸαžŸαž“αŸ…αž–αŸαž›αž–αž·αž…αžΆαžšαžŽαžΆαž›αžΎαž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž”αž“αŸ’αžαŸ‚αž˜αž€αž˜αŸ’αžšαž·αžαž˜αŸ‰αžΆαžŸαŸŠαžΈαž“ (Upgrades)αŸ” αžαž˜αŸ’αž›αŸƒαžšαž”αžŸαŸ‹ Apple αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž”αž“αŸ’αžαŸ‚αž˜ Memory (RAM) αž“αž·αž„αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€ (Storage) αž‚αžΊαžαŸ’αž–αžŸαŸ‹αž€αž”αŸ‹αž–αž–αž€ αžŠαŸ‚αž›αž‡αžΆαž€αžΆαžšαžαž€αž…αž·αžαŸ’αžαž˜αž½αž™αž”αž“αŸ’αžαŸ‚αž˜αž‘αŸ€αžαžŠαŸ„αž™αžŸαžΆαžšαžαŸ‚αžŸαž˜αžΆαžŸαž’αžΆαžαž»αž‘αžΆαŸ†αž„αž“αŸαŸ‡αžαŸ’αžšαžΌαžœαž”αžΆαž“αž•αŸ’αžŸαžΆαžšαž—αŸ’αž‡αžΆαž”αŸ‹αžŠαŸ„αž™αž•αŸ’αž‘αžΆαž›αŸ‹αž‘αŸ…αž“αžΉαž„ Motherboard αžŠαŸ‚αž›αž αžΆαž€αŸ‹αžŠαžΌαž…αž‡αžΆαž‘αž”αŸ‹αžŸαŸ’αž€αžΆαžαŸ‹αž’αŸ’αž“αž€αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αž˜αž·αž“αž±αŸ’αž™αž’αŸ’αžœαžΎαž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž”αž“αŸ’αžαŸ‚αž˜αžŠαŸ„αž™αžαŸ’αž›αž½αž“αž―αž„αž”αžΆαž“αŸ”

αž€αžΆαžšαž’αž“αž»αžœαžαŸ’αžαž“αŸƒαž€αžΆαžšαž•αŸ’αžŸαžΆαžšαž—αŸ’αž‡αžΆαž”αŸ‹αžŸαž˜αžΆαžŸαž’αžΆαžαž»αž“αŸαŸ‡αž˜αž·αž“αž˜αŸ‚αž“αž‚αŸ’αž˜αžΆαž“αž‚αž»αžŽαžŸαž˜αŸ’αž”αžαŸ’αžαž·αž”αž…αŸ’αž…αŸαž€αž‘αŸαžŸαž“αŸ„αŸ‡αž‘αŸαŸ” αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ System Memory (RAM) αž—αžΆαž–αž“αŸ…αž‡αž·αžαž‚αŸ’αž“αžΆαž‘αŸ…αž“αžΉαž„ CPU αž‚αžΊαž˜αžΆαž“αžŸαžΆαžšαŸˆαžŸαŸ†αžαžΆαž“αŸ‹αžŽαžΆαžŸαŸ‹αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αžΆαžšαžŸαž˜αŸ’αžšαŸαž…αž”αžΆαž“αž“αžΌαžœαž€αž˜αŸ’αžšαž·αžαžŠαŸ†αžŽαžΎαžšαž€αžΆαžšαžαŸ’αž–αžŸαŸ‹αžŠαŸ‚αž›αžƒαžΎαž‰αž“αŸ…αž€αŸ’αž“αž»αž„αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αž…αž»αž„αž€αŸ’αžšαŸ„αž™αžšαž”αžŸαŸ‹ AppleαŸ” αž€αžΆαžšαžαž™αž…αž»αŸ‡αž“αŸƒαžŸαŸαžœαžΆ (Signal degradation) αž–αžΈαž•αŸ’αž›αžΌαžœαž”αž‰αŸ’αž‡αžΌαž“αžœαŸ‚αž„ αž“αž·αž„αž§αž”αž€αžšαžŽαŸαž—αŸ’αž‡αžΆαž”αŸ‹ (Connectors) αž“αžΉαž„αž’αŸ’αžœαžΎαž±αŸ’αž™αžαžΌαž…αžŠαž›αŸ‹αž›αŸ’αž”αžΏαž“αž“αŸƒ GPU αžŠαŸ‚αž›αž”αžΆαž“αž”αž‰αŸ’αž…αžΌαž›αž€αŸ’αž“αž»αž„αž“αŸ„αŸ‡ (Integrated GPU)αŸ” αžαžŽαŸˆαž–αŸαž›αžŠαŸ‚αž›αž€αŸ’αžšαž»αž˜αž αŸŠαž»αž“αž•αž›αž·αžαž•αŸ’αžŸαŸαž„αž‘αŸ€αžαž’αžΆαž…αž•αŸ’αžαž›αŸ‹αž’αžΆαž‘αž·αž—αžΆαž–αž‘αŸ…αž›αžΎαž—αžΆαž–αž’αžΆαž…αž•αŸ’αž›αžΆαžŸαŸ‹αž”αŸ’αžαžΌαžšαž”αžΆαž“ (Modularity) Apple αž”αžΆαž“αž‡αŸ’αžšαžΎαžŸαžšαžΎαžŸαž•αŸ’αžαž›αŸ‹αž’αžΆαž‘αž·αž—αžΆαž–αž›αžΎαž”αŸ’αžšαžŸαž·αž‘αŸ’αž’αž—αžΆαž–αžαŸ’αž–αžŸαŸ‹αž”αŸ†αž•αž»αž αžŠαŸ‚αž›αž‡αžΆαž€αžΆαžšαžŸαž˜αŸ’αžšαŸαž…αž…αž·αžαŸ’αžαž•αŸ’αž“αŸ‚αž€αžœαž·αžŸαŸ’αžœαž€αž˜αŸ’αž˜αžŠαŸαžαŸ’αžšαžΉαž˜αžαŸ’αžšαžΌαžœαž˜αž½αž™αŸ”

αž‘αŸ„αŸ‡αž‡αžΆαž™αŸ‰αžΆαž„αžŽαžΆαž€αŸαžŠαŸ„αž™ αž…αŸ†αž–αŸ„αŸ‡ αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€ (Storage) αžœαž·αž‰αž‚αžΊαž˜αž·αž“αžŠαžΌαž…αž‚αŸ’αž“αžΆαž‘αŸαŸ” αžαžŽαŸˆαž–αŸαž›αžŠαŸ‚αž›αžŸαŸ’αžαžΆαž”αžαŸ’αž™αž€αž˜αŸ’αž˜αž•αŸ’αž‘αž»αž€αž‘αž·αž“αŸ’αž“αž“αŸαž™αžšαž”αžŸαŸ‹ Apple αž”αž‰αŸ’αž…αžΌαž› Controller αž‘αŸ…αž€αŸ’αž“αž»αž„ CPU αžŠαŸ„αž™αž•αŸ’αž‘αžΆαž›αŸ‹αžŠαžΎαž˜αŸ’αž”αžΈαž”αž„αŸ’αž€αžΎαž“αžŸαž»αžœαžαŸ’αžαž·αž—αžΆαž–αž€αž˜αŸ’αžšαž·αž Hardware αžαžΆαž˜αžšαž™αŸˆ Secure Enclave αžœαžΆαž‚αŸ’αž˜αžΆαž“αž•αž›αž”αŸ‰αŸ‡αž–αžΆαž›αŸ‹αžαŸ’αž›αžΆαŸ†αž„αžŠαž›αŸ‹αžŠαŸ†αžŽαžΎαžšαž€αžΆαžšαž˜αŸ‰αžΆαžŸαŸŠαžΈαž“αž‘αŸ αž”αŸ’αžšαžŸαž·αž“αž”αžΎαž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€αžŠαŸ‚αž›αž’αžΆαž…αžŠαŸ„αŸ‡αžŠαžΌαžšαž”αžΆαž“αŸ” αž“αŸαŸ‡αžαŸ’αžšαžΌαžœαž”αžΆαž“αž”αž‰αŸ’αž‡αžΆαž€αŸ‹αž™αŸ‰αžΆαž„αž…αŸ’αž”αžΆαžŸαŸ‹αž“αŸ…αž€αŸ’αž“αž»αž„αž€αžΆαžšαžšαž…αž“αžΆαžšαž”αžŸαŸ‹ Apple αž•αŸ’αž‘αžΆαž›αŸ‹αžŸαž˜αŸ’αžšαžΆαž”αŸ‹ Mac Studio αž“αž·αž„ M4 Mac Mini αžŠαŸ‚αž›αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹αž€αžΆαžαž•αŸ’αž‘αž»αž€αž‘αž·αž“αŸ’αž“αž“αŸαž™αžŠαŸ‚αž›αž’αžΆαž…αžŠαŸ„αŸ‡αžŠαžΌαžšαž”αžΆαž“αŸ” αž αŸαžαž»αž•αž›αž…αž˜αŸ’αž”αž„αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αžΆαžšαž•αŸ’αžŸαžΆαžšαž—αŸ’αž‡αžΆαž”αŸ‹αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€αž“αŸ…αž€αŸ’αž“αž»αž„αž˜αŸ‰αžΌαžŠαŸ‚αž›αž•αŸ’αžŸαŸαž„αž‘αŸ€αž αž αžΆαž€αŸ‹αžŠαžΌαž…αž‡αžΆαž€αžΆαžšαžšαž½αž˜αž”αž‰αŸ’αž…αžΌαž›αž‚αŸ’αž“αžΆαž“αŸƒαž‘αž˜αŸ’αž›αžΆαž”αŸ‹αžŠαŸ‚αž›αž˜αžΆαž“αž‡αžΆαž™αžΌαžšαž˜αž€αž αžΎαž™ αž“αž·αž„αžŸαŸ†αžαžΆαž“αŸ‹αž‡αžΆαž„αž“αŸαŸ‡αž‘αŸ…αž‘αŸ€αžαž“αŸ„αŸ‡αž‚αžΊ αž‚αŸ†αžšαžΌαž’αžΆαž‡αžΈαžœαž€αž˜αŸ’αž˜αžŠαŸ‚αž›αžšαž€αž”αŸ’αžšαžΆαž€αŸ‹αž…αŸ†αžŽαŸαž‰αž”αžΆαž“αž…αŸ’αžšαžΎαž“αŸ”

αž”αŸ‰αž»αž“αŸ’αžαŸ‚αžαžΎαž˜αžΆαž“αžœαž·αž’αžΈαžŽαžΆαžŠαŸ‚αž›αžŠαŸ‚αž“αž€αŸ†αžŽαžαŸ‹αž‘αžΆαŸ†αž„αž“αŸαŸ‡αž’αžΆαž…αžαŸ’αžšαžΌαžœαž”αžΆαž“αžœαžΆαž„αž”αžΆαž“αžŠαŸ‚αžšαž¬αž‘αŸ? αžŸαžΌαž˜αžŽαŸ‚αž“αžΆαŸ† Colin αž˜αž€αž–αžΈαž†αžΆαž“αŸ‚αž› YouTube αžˆαŸ’αž˜αŸ„αŸ‡ dosdude1 αžŠαŸ‚αž›αž‡αžΆαž’αŸ’αž“αž€αž―αž€αž‘αŸαžŸαž€αŸ’αž“αž»αž„αžŸαž·αž›αŸ’αž”αŸˆαžŠαŸαžŸαŸ’αž˜αž»αž‚αžŸαŸ’αž˜αžΆαž‰αž“αŸƒαž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž€αž˜αŸ’αžšαž·αž Mac αžŠαŸ‚αž› Apple αž…αžΆαžαŸ‹αž‘αž»αž€αžαžΆαž˜αž·αž“αž’αžΆαž…αžŠαŸ†αž‘αžΎαž„αž”αžΆαž“αŸ” αž‡αžΆαž˜αž½αž™αž“αžΉαž„αž§αž”αž€αžšαžŽαŸ αž“αž·αž„αž‡αŸ†αž“αžΆαž‰αžαŸ’αžšαžΉαž˜αžαŸ’αžšαžΌαžœ αžœαžΆαž–αž·αžαž‡αžΆαž’αžΆαž…αž‘αŸ…αžšαž½αž…αž€αŸ’αž“αž»αž„αž€αžΆαžšαžŠαž€αž™αž€αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€αžŠαžΎαž˜αž…αŸαž‰ (Desolder) αž αžΎαž™αž‡αŸ†αž“αž½αžŸαžœαžΆαžŠαŸ„αž™αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αžŠαŸ‚αž›αž˜αžΆαž“αžŸαž˜αžαŸ’αžαž—αžΆαž–αžαŸ’αž–αžŸαŸ‹αž‡αžΆαž„αŸ”

αžŠαŸ†αžŽαžΎαžšαž€αžΆαžšαž“αŸαŸ‡αž‚αžΊαž‡αžΆαž€αžΆαžšαž„αžΆαžšαžŠαŸ‚αž›αž‘αžΆαž˜αž‘αžΆαžšαž—αžΆαž–αž‡αžΆαž€αŸ‹αž›αžΆαž€αŸ‹ αž“αž·αž„αž‡αŸ†αž“αžΆαž‰αž”αž…αŸ’αž…αŸαž€αž‘αŸαžŸαžαŸ’αž–αžŸαŸ‹αŸ” αžœαžΆαž‘αžΆαž˜αž‘αžΆαžšαž§αž”αž€αžšαžŽαŸαž‡αŸ†αž“αžΆαž‰αž˜αž½αž™αžˆαž»αž αžšαž½αž˜αž˜αžΆαž“ αž˜αŸ‰αžΆαžŸαŸŠαžΈαž“αž”αžΆαž‰αŸ‹αž€αž˜αŸ’αžŠαŸ… (Hot air station), αžŠαŸ‚αž€αž•αŸ’αžŸαžΆαžšαžŠαŸ‚αž›αž˜αžΆαž“αž‚αž»αžŽαž—αžΆαž–, αž˜αŸ’αžŸαŸ…αž•αŸ’αžŸαžΆαžš (Solder paste), αžαŸ’αžŸαŸ‚αž”αŸŠαžΊαžαžŸαŸ†αžŽ (Solder wick), αž”αž“αŸ’αž‘αŸ‡αž–αž»αž˜αŸ’αž– BGA αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NAND, αž§αž”αž€αžšαžŽαŸαž€αŸ„αžŸαž€αžΆαžœ (Underfill removal tool), αž“αž·αž„αž§αž”αž€αžšαžŽαŸαž€αž˜αŸ’αžŠαŸ…αž”αžΆαž (Preheater)αŸ” αž‘αŸ„αŸ‡αž”αžΈαž‡αžΆαž§αž”αž€αžšαžŽαŸαž‘αžΆαŸ†αž„αž“αŸαŸ‡αž’αžΆαž…αžšαž€αž‘αž·αž‰αž”αžΆαž“αž€αŸαžŠαŸ„αž™ αž”αŸ‰αž»αž“αŸ’αžαŸ‚αž“αžΈαžαž·αžœαž·αž’αžΈαž“αŸαŸ‡αž‘αžΆαž˜αž‘αžΆαžšαž€αžΆαžšαž’αž“αž»αžœαžαŸ’αžαž™αŸ‰αžΆαž„αž…αŸ’αžšαžΎαž“αžŠαžΎαž˜αŸ’αž”αžΈαž‡αŸ€αžŸαžœαžΆαž„αž€αžΆαžšαž’αŸ’αžœαžΎαž±αŸ’αž™αžαžΌαž… Logic boardαŸ”

αžŠαŸ†αžŽαžΎαžšαž€αžΆαžšαž“αŸƒαž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž“αŸαŸ‡αž…αžΆαž”αŸ‹αž•αŸ’αžαžΎαž˜αž‡αžΆαž˜αž½αž™αž“αžΉαž„ M2 MacBook Air αž‘αŸ†αž αŸ† 256GB αžŠαŸ‚αž›αž‡αžΆαž€αžΆαžšαž€αŸ†αžŽαžαŸ‹αžšαž…αž“αžΆαžŸαž˜αŸ’αž–αŸαž“αŸ’αž’αž˜αž½αž™αžŠαŸ‚αž›αž”αž„αŸ’αž αžΆαž‰αž–αžΈαž”αž‰αŸ’αž αžΆαž”αŸ’αžšαžˆαž˜αžŠαŸαž–αž·αžŸαŸαžŸαŸ” αž˜αž·αž“αžαŸ’αžšαžΉαž˜αžαŸ‚αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NAND αžαŸ‚αž˜αž½αž™αžαŸ’αžšαžΌαžœαž”αžΆαž“αž•αŸ’αžŸαžΆαžšαž—αŸ’αž‡αžΆαž”αŸ‹αž‘αŸ…αž“αžΉαž„αž€αŸ’αžαžΆαžšαž”αŸ‰αž»αžŽαŸ’αžŽαŸ„αŸ‡αž‘αŸ αž”αŸ‰αž»αž“αŸ’αžαŸ‚ Apple αž€αŸαž”αžΆαž“αž›αž»αž”αž…αŸ„αž›αžŸαž˜αžΆαžŸαž’αžΆαžαž»αž‡αŸ†αž“αž½αž™αž”αŸ’αžšαž αŸ‚αž› αŸ₯០ αž‚αŸ’αžšαžΆαž”αŸ‹αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NAND αž‘αžΈαž–αžΈαžšαž•αž„αžŠαŸ‚αžšαŸ” αž“αŸαŸ‡αž˜αžΆαž“αž“αŸαž™αžαžΆαž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž˜αž·αž“αžαŸ’αžšαžΉαž˜αžαŸ‚αž‡αžΆαž€αžΆαžšαž‡αŸ†αž“αž½αžŸαž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€αž”αŸ‰αž»αžŽαŸ’αžŽαŸ„αŸ‡αž‘αŸ αž”αŸ‰αž»αž“αŸ’αžαŸ‚αžαŸ‚αž˜αž‘αžΆαŸ†αž„αžαŸ’αžšαžΌαžœαžŠαŸ†αž‘αžΎαž„αžŸαž˜αžΆαžŸαž’αžΆαžαž»αžŠαŸ‚αž›αž”αžΆαžαŸ‹αž‘αžΆαŸ†αž„αž“αŸαŸ‡αž‘αžΎαž„αžœαž·αž‰αž™αŸ‰αžΆαž„αž›αŸ’αž’αž·αžαž›αŸ’αž’αž“αŸ‹αŸ” αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NAND αžŠαŸ‚αž›αž…αžΆαŸ†αž”αžΆαž…αŸ‹αž’αžΆαž…αžαŸ’αžšαžΌαžœαž”αžΆαž“αžšαž€αžƒαžΎαž‰αž–αžΈαžœαŸαž‘αž·αž€αžΆαžŠαžΌαž…αž‡αžΆ AliExpress αžαžŽαŸˆαž–αŸαž›αžŠαŸ‚αž›αžŸαž˜αžΆαžŸαž’αžΆαžαž»αž‡αŸ†αž“αž½αž™αž’αžΆαž…αžšαž€αž”αžΆαž“αž“αŸ…αž’αŸ’αž“αž€αž…αŸ‚αž€αž…αžΆαž™αžŠαžΌαž…αž‡αžΆ Mouser ឬ DigiKeyαŸ” αž‘αŸ„αŸ‡αž”αžΈαž‡αžΆαž˜αžΆαž“αž€αžΆαžšαž…αŸ†αžŽαžΆαž™αž‘αžΆαŸ†αž„αž“αŸαŸ‡αž€αŸαžŠαŸ„αž™ αž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αžŠαŸ„αž™αžαŸ’αž›αž½αž“αž―αž„ (DIY) αž¬αžŸαžΌαž˜αŸ’αž”αžΈαžαŸ‚αž’αŸ’αžœαžΎαž‘αžΎαž„αžŠαŸ„αž™αž’αŸ’αž“αž€αž‡αŸ†αž“αžΆαž‰αžŠαžΌαž…αž‡αžΆ Colin αž’αžΆαž…αž˜αžΆαž“αžαž˜αŸ’αž›αŸƒαžαŸ’αžšαžΉαž˜αžαŸ‚αž–αžΆαž€αŸ‹αž€αžŽαŸ’αžαžΆαž›αž“αŸƒαžαž˜αŸ’αž›αŸƒαžŠαŸ†αž‘αžΎαž„αž•αŸ’αž›αžΌαžœαž€αžΆαžšαžšαž”αžŸαŸ‹ Apple αž”αŸ‰αž»αžŽαŸ’αžŽαŸ„αŸ‡αŸ”

αž“αžΈαžαž·αžœαž·αž’αžΈαžαŸ’αž›αž½αž“αžœαžΆαž‚αžΊαž‡αžΆαž€αž˜αŸ’αžšαž·αžαž€αŸ†αž–αžΌαž›αž“αŸƒαž€αžΆαžšαž•αŸ’αžŸαžΆαžšαž‚αŸ’αžšαžΏαž„αž’αŸαž‘αž·αž…αžαŸ’αžšαžΌαž“αž·αž…αžαŸ’αž“αžΆαžαžαžΌαž… (Micro-soldering)αŸ” αžœαžΆαž–αžΆαž€αŸ‹αž–αŸαž“αŸ’αž’αž“αžΉαž„αž€αžΆαžšαžšαž»αŸ‡αžšαžΎ MacBook αžŠαŸ„αž™αž”αŸ’αžšαž»αž„αž”αŸ’αžšαž™αŸαžαŸ’αž“ αž€αžΆαžšαžŠαž€αžšαž”αžΆαŸ†αž„αž€αžΆαžšαž–αžΆαžšαž€αž˜αŸ’αžŠαŸ…αžŠαŸ„αž™αž˜αž·αž“αž±αŸ’αž™αžœαžΆαž€αŸ„αž„ αž αžΎαž™αž”αž“αŸ’αž‘αžΆαž”αŸ‹αž˜αž€αž•αŸ’αžαŸ„αžαž›αžΎαž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NANDαŸ” αž€αžΆαžœ Underfill αžŠαŸ‚αž›αž‡αžΆαžŸαžΆαžšαž’αžΆαžαž»αž”αŸ’αžšαžΎαžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž€αžΆαžšαž–αžΆαžšαž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” αžαŸ’αžšαžΌαžœαžαŸ‚αž€αŸ„αžŸαž…αŸαž‰αžŠαŸ„αž™αž”αŸ’αžšαž»αž„αž”αŸ’αžšαž™αŸαžαŸ’αž“αž”αž“αŸ’αž‘αžΆαž”αŸ‹αž–αžΈαžαŸ’αžšαžΌαžœαž”αžΆαž“αž€αž˜αŸ’αžŠαŸ…αŸ” αž”αž“αŸ’αž‘αžΆαž”αŸ‹αž˜αž€ αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αžαŸ’αžšαžΌαžœαž”αžΆαž“αžŠαž€αž…αŸαž‰αžŠαŸ„αž™αž”αŸ’αžšαžΎαž˜αŸ‰αžΆαžŸαŸŠαžΈαž“αž”αžΆαž‰αŸ‹αž€αž˜αŸ’αžŠαŸ… αž“αž·αž„αž§αž”αž€αžšαžŽαŸαž–αž·αžŸαŸαžŸαžŠαžΎαž˜αŸ’αž”αžΈαž›αžΎαž€αžœαžΆαž…αŸαž‰αž–αžΈαž€αŸ’αžαžΆαžšαžŠαŸ„αž™αžαŸ’αž“αž˜αŸ—αŸ”

αž‡αžΆαž˜αž½αž™αž“αžΉαž„αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αž…αžΆαžŸαŸ‹αžαŸ’αžšαžΌαžœαž”αžΆαž“αžŠαž€αž…αŸαž‰ Logic board αžαŸ’αžšαžΌαžœαž”αžΆαž“αžšαŸ€αž”αž…αŸ†αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€αžαŸ’αž˜αžΈαŸ” αž“αŸαŸ‡αž–αžΆαž€αŸ‹αž–αŸαž“αŸ’αž’αž“αžΉαž„αž€αžΆαžšαžŸαž˜αŸ’αž’αžΆαžαž‡αžΎαž„αž”αžΆαžαž•αŸ’αžŸαžΆαžš (Solder pads) αžŠαŸ‚αž›αžŠαŸ†αžŽαžΎαžšαž€αžΆαžšαž“αŸαŸ‡αžαŸ’αžšαžΌαžœαž”αžΆαž“αž’αŸ’αžœαžΎαž±αŸ’αž™αž€αžΆαž“αŸ‹αžαŸ‚αž„αžΆαž™αžŸαŸ’αžšαž½αž›αžŠαŸ„αž™αž€αžΆαžšαžŠαžΆαž€αŸ‹αžŸαŸ†αžŽαžŠαŸ‚αž›αž˜αžΆαž“αž‡αžΆαžαž·αžŸαŸ†αžŽ (Leaded solder) αž˜αž»αž“αž–αŸαž›αž”αŸŠαžΊαžαž™αž€αžŸαŸ†αžŽαž…αžΆαžŸαŸ‹αžŠαŸ‚αž›αž‚αŸ’αž˜αžΆαž“αž‡αžΆαžαž·αžŸαŸ†αžŽαž…αŸαž‰αŸ” αž“αŸ…αž€αŸ’αž“αž»αž„αž€αžšαžŽαžΈαž“αŸƒ MacBook Air 256GB αžŸαž˜αžΆαžŸαž’αžΆαžαž»αž‡αŸ†αž“αž½αž™αžŠαŸ‚αž›αž”αžΆαžαŸ‹αžŸαž˜αŸ’αžšαžΆαž”αŸ‹αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NAND αž‘αžΈαž–αžΈαžšαžαŸ’αžšαžΌαžœαžαŸ‚αžαŸ’αžšαžΌαžœαž”αžΆαž“αž•αŸ’αžŸαžΆαžšαž—αŸ’αž‡αžΆαž”αŸ‹αž™αŸ‰αžΆαž„αž›αŸ†αž”αžΆαž€αž‘αŸ…αž“αžΉαž„αž€αž“αŸ’αž›αŸ‚αž„αžšαž”αžŸαŸ‹αžœαžΆ αžŠαŸ„αž™αž•αŸ’αž’αŸ‚αž€αž›αžΎαž”αŸ’αž›αž„αŸ‹αžŸαŸ€αž‚αŸ’αžœαžΈ (Schematics) αžŠαŸ‚αž›αž˜αž·αž“αžαŸ’αžšαžΌαžœαž”αžΆαž“αž•αŸ’αžαž›αŸ‹αž±αŸ’αž™αž‡αžΆαž•αŸ’αž›αžΌαžœαž€αžΆαžšαžŠαŸ„αž™ Apple αž”αŸ‰αž»αž“αŸ’αžαŸ‚αžαŸ’αžšαžΌαžœαž”αžΆαž“αž‘αž‘αž½αž›αžαžΆαž˜αžšαž™αŸˆαž”αžŽαŸ’αžαžΆαž‰αž•αŸ’αžŸαŸαž„αž‘αŸ€αžαŸ”

αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž” NAND αžαŸ’αž˜αžΈαžŠαŸ‚αž›αž˜αžΆαž“αžŸαž˜αžαŸ’αžαž—αžΆαž–αžαŸ’αž–αžŸαŸ‹αž‡αžΆαž„ αžŠαŸ‚αž›αž€αŸ’αž“αž»αž„αž€αžšαžŽαžΈαž“αŸαŸ‡αž‚αžΊαž‘αž‘αŸ αž“αž·αž„αž˜αž·αž“αž‘αžΆαž“αŸ‹αž”αžΆαž“αžŸαžšαžŸαŸαžšαž€αž˜αŸ’αž˜αžœαž·αž’αžΈ αžαŸ’αžšαžΌαžœαž”αžΆαž“αž™αž€αž‘αŸ…αž’αŸ’αžœαžΎ "Reballing" (αž”αžŽαŸ’αžαž»αŸ‡αž‡αžΎαž„αžαŸ’αž˜αžΈ)αŸ” αž“αŸαŸ‡αž–αžΆαž€αŸ‹αž–αŸαž“αŸ’αž’αž“αžΉαž„αž€αžΆαžšαžŠαžΆαž€αŸ‹αž‚αŸ’αžšαžΆαž”αŸ‹αžŸαŸ†αžŽαžαŸ’αž˜αžΈαž‘αŸ…αž›αžΎαž‡αžΎαž„αžšαž”αžŸαŸ‹αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αžŠαŸ„αž™αž”αŸ’αžšαžΎαž–αž»αž˜αŸ’αž– αž“αž·αž„αž˜αŸ’αžŸαŸ…αž•αŸ’αžŸαžΆαžšαŸ” αž“αŸ…αž–αŸαž›αžšαŸ€αž”αž…αŸ†αžšαž½αž…αžšαžΆαž›αŸ‹ αž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αžαŸ’αž˜αžΈαžαŸ’αžšαžΌαžœαž”αžΆαž“αžŠαžΆαž€αŸ‹αž‘αžΈαžαžΆαŸ†αž„αž™αŸ‰αžΆαž„αž”αŸ’αžšαž»αž„αž”αŸ’αžšαž™αŸαžαŸ’αž“αž“αŸ…αž›αžΎ Logic board αž αžΎαž™αž•αŸ’αžŸαžΆαžšαž—αŸ’αž‡αžΆαž”αŸ‹αž‘αŸ…αž“αžΉαž„αž€αž“αŸ’αž›αŸ‚αž„αžšαž”αžŸαŸ‹αžœαžΆαžŠαŸ„αž™αž”αŸ’αžšαžΎαž˜αŸ‰αžΆαžŸαŸŠαžΈαž“αž”αžΆαž‰αŸ‹αž€αž˜αŸ’αžŠαŸ…αŸ” αž€αžΆαžšαž‚αŸ„αŸ‡αžαŸ’αž“αž˜αŸ—αž›αžΎαž”αž“αŸ’αž‘αŸ‡αžˆαžΈαž”αž”αž‰αŸ’αž‡αžΆαž€αŸ‹αžαžΆαžœαžΆαžαŸ’αžšαžΌαžœαž”αžΆαž“αžŠαžΆαž€αŸ‹αž…αžΌαž›αž™αŸ‰αžΆαž„αžαŸ’αžšαžΉαž˜αžαŸ’αžšαžΌαžœ αžαžŽαŸˆαžŠαŸ‚αž›αžŸαŸ†αžŽαžšαž›αžΆαž™αž“αŸ…αžαžΆαž„αž€αŸ’αžšαŸ„αž˜αžœαžΆαž”αž„αŸ’αž€αžΎαžαž‡αžΆαž€αž˜αŸ’αž›αžΆαŸ†αž„αžαžΆαž“αžαžΉαž„αž•αŸ’αž‘αŸƒ (Surface tension)αŸ”

αž‡αŸ†αž αžΆαž“αž…αž»αž„αž€αŸ’αžšαŸ„αž™αž‚αžΊαž€αžΆαžšαžŸαŸ’αžαžΆαžš Firmware αžšαž”αžŸαŸ‹ Mac αž‘αžΎαž„αžœαž·αž‰αŸ” αž“αŸαŸ‡αžαŸ’αžšαžΌαžœαž”αžΆαž“αž’αŸ’αžœαžΎαž‘αžΎαž„αžŠαŸ„αž™αžŠαžΆαž€αŸ‹ Mac αž…αžΌαž›αž‘αŸ…αž€αŸ’αž“αž»αž„ DFU mode (Device Firmware Upgrade) αž“αž·αž„αž”αŸ’αžšαžΎαž”αŸ’αžšαžΆαžŸαŸ‹ Mac αž˜αž½αž™αž•αŸ’αžŸαŸαž„αž‘αŸ€αžαžŠαžΎαž˜αŸ’αž”αžΈαžŠαŸ†αžŽαžΎαžšαž€αžΆαžš RestoreαŸ” αž”αŸ’αžšαžŸαž·αž“αž”αžΎαž€αžΆαžšαžŠαŸ†αž‘αžΎαž„αž‘αž‘αž½αž›αž”αžΆαž“αž‡αŸ„αž‚αž‡αŸαž™ αž”αŸ’αžšαž–αŸαž“αŸ’αž’αž“αžΉαž„αžŸαŸ’αž‚αžΆαž›αŸ‹αž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€αžαŸ’αž˜αžΈαžŠαŸ‚αž›αž’αŸ†αž‡αžΆαž„αž˜αž»αž“αŸ” αž€αŸ’αž“αž»αž„αž€αžšαžŽαžΈαž“αŸαŸ‡ MacBook Air 256GB αžαŸ’αžšαžΌαžœαž”αžΆαž“αžŠαŸ†αž‘αžΎαž„αžŠαŸ„αž™αž‡αŸ„αž‚αž‡αŸαž™αž‘αŸ…αž‡αžΆαž‘αŸ†αž αŸ†αž•αŸ’αž‘αž»αž€ 2TBαŸ”

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