Whatsminer KF1978E Stencil Tin Fixture for M50S M60S ASIC Chips
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Whatsminer KF1978E Stencil Tin Fixture | Laser-Cut Solder Paste Mask for M50S / M60S ASIC Chip Hashboard Repair
This KF1978E stencil tin fixture is a laser-cut tin-plated steel mesh for precision solder paste application on Whatsminer M50S and M60S ASIC chips. The aperture pattern matches the KF1978E BGA pad layout exactly, enabling uniform tinning in a single pass. Eco-friendly construction resists heat-induced expansion and deformation across repeated reflow cycles, maintaining hole-position accuracy over the stencil's service life.
Freehand solder paste application produces inconsistent coverage — oversized deposits bridge adjacent pads, undersized deposits create voids. This stencil controls the paste volume at every aperture, producing consistent joints across the entire BGA array. The result is fewer rework cycles, higher first-pass yield, and faster repair turnaround on M50S / M60S hashboards.
When to Use the KF1978E Stencil
- KF1978E chip replacement — full BGA reball or fresh paste deposit before placing a new chip.
- Hashboard rework after chip-level fault — reflowing the same chip with cleaned-up paste pattern.
- Volume repair benches — repeatable paste pattern across dozens of chip swaps per shift.
- Recovery of marginal chips — fresh paste application can recover chips that scan flaky due to bad solder joints.
KF1978E Stencil Specifications
| Feature | Specification |
|---|---|
| Compatible Chip | KF1978E |
| Compatible Miners | Whatsminer M50S, M60S |
| Material | Laser-cut tin-plated steel |
| Aperture Pattern | KF1978E BGA pad layout |
| Heat Resistance | High (no deformation under reflow) |
| Reusable | Yes — multiple reflow cycles |
| Weight | 5g |
| Condition | New |
FAQ — KF1978E Stencil Tin Fixture
Q: Stencil only, or does it include the chip holder?
A: Stencil plate only. The matching chip holder / positioning fixture is sold separately when needed — most repair benches running KF1978E volume use the stencil + holder + tin tool as a complete kit.
Q: How many reflow cycles before the stencil needs replacing?
A: With proper IPA cleaning between uses and avoiding mechanical damage, expect many dozens of cycles before aperture wear becomes noticeable. Inspect under magnification periodically.
Q: Can I use this stencil for KF1978 (without the "E" suffix) chips?
A: The KF1978E variant has its own pad layout — match the suffix exactly. For non-"E" KF1978 chips, use the corresponding stencil for that part number.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com for volume pricing on KF1978E stencils plus matched chip holders and tin tools.
Related products
- KF1978E ASIC Chip Tin Tool (M50S / M60S)
- KF1921 Tin Fixture Stencil Plate (70mm Square)
- KF1930 Tin Tool (M30 Hashboard)
- KF1950 Stencil Plate (M30 Hashboard)
Equipping a Whatsminer repair bench with KF1978E stencils? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
Shipping & Customs
🇺🇸🇪🇺 USA & European Union (DDP):
Orders are delivered DDP (Delivered Duty Paid). All customs duties, import taxes, and fees are included — no additional charges on delivery.
🌍 Rest of world:
Orders ship from China. Depending on your country, local customs authorities may apply import duties or taxes. Any such fees are set by your local authorities and are not included in the product price.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
