{"product_id":"bm1370bc-asic-chip-tin-stencil-antminer-s21pro-hashboard","title":"BM1370BC ASIC Chip Tin Stencil for Antminer S21Pro Hashboard","description":"\u003ch2\u003eBM1370BC Tin Stencil – Antminer S21 Pro Hashboard ASIC Chip Repair\u003c\/h2\u003e\n\u003cp\u003eAchieving a reliable BGA reflow on the \u003cstrong\u003eBM1370BC ASIC chip\u003c\/strong\u003e starts with even solder-ball placement — and that requires a purpose-built stencil. This \u003cstrong\u003etin stencil\u003c\/strong\u003e is laser-cut specifically for the BM1370BC pad array used on \u003cstrong\u003eAntminer S21 Pro\u003c\/strong\u003e hash boards. The \u003cstrong\u003ehigh-temperature aluminum alloy base\u003c\/strong\u003e resists warping during preheat, and the \u003cstrong\u003ewear-resistant steel mesh\u003c\/strong\u003e maintains aperture accuracy across hundreds of chip replacements.\u003c\/p\u003e\n\u003ch3\u003eWhy a Dedicated Stencil Matters for the BM1370BC\u003c\/h3\u003e\n\u003cp\u003eThe BM1370BC's BGA pad pitch is tight enough that manual solder-paste application almost always produces bridges or voids. A stencil guarantees the correct paste volume on every pad, eliminating the two most common reflow failures: solder bridges between adjacent balls (causing short circuits that can damage the chip on power-up) and insufficient paste (creating open joints that appear as intermittent hash errors). For shops running S21 Pro repairs at volume, the stencil pays for itself after the first successful chip swap.\u003c\/p\u003e\n\u003ch3\u003eStencilling Workflow\u003c\/h3\u003e\n\u003cp\u003eAfter removing the failed BM1370BC with a hot-air station and cleaning the PCB pads, place the stencil over the chip footprint and align it with the corner fiducials. Apply lead-free solder paste with a squeegee in a single smooth pass, then lift the stencil vertically to avoid smearing. Place the new BM1370BC chip, aligning its pin-1 marker with the PCB reference, and reflow using a BGA-profile hot-air station. After cooling, inspect under magnification and run a test-fixture scan to confirm the chip is hashing at full speed.\u003c\/p\u003e\n\u003ch4\u003eBM1370BC Tin Stencil Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eAntminer S21 Pro (BM1370BC ASIC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eBase Material\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eHigh-temperature aluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eMesh Material\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eWear-resistant steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eFunction\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eEven solder-ball placement for BM1370BC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRelated BM1370BC \u0026amp; S21 Pro Repair Tools\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/bm1370bc-asic-chip-tin-tool-station-antminer-s21pro-crypto-miner-hashboard-repair\"\u003eBM1370BC Tin Tool Station – S21 Pro Hashboard\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/bitmain-bm1370bc-asic-chip-antminer-s21pro-s21xp-s21hydro\"\u003eBM1370BC ASIC Chip – S21 Pro \/ S21XP \/ S21 Hydro\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/antminer-s21pro-thermal-paste-precision-grease-application-tool-hash-board-asic-chips\"\u003eS21 Pro Thermal Paste Precision Application Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/antminer-bm1370-series-asic-chip-tester\"\u003eBM1370 Series ASIC Chip Tester\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRunning S21 Pro chip replacements at scale? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for stencil and chip bundle pricing.\u003c\/p\u003e\n\u003cp\u003eWorldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":44127497224371,"sku":null,"price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/BM1370BC-chip-tin_tool-tin-stencil-Antminer-S21Pro-crypto-miner-hashboard-repair_2.webp?v=1744470764","url":"https:\/\/lys-sz.com\/products\/bm1370bc-asic-chip-tin-stencil-antminer-s21pro-hashboard","provider":"LYS Shenzhen","version":"1.0","type":"link"}