For the front and back of the hash board, the steel windshield is under 21V voltage. When measuring the signal, two fans are used to dissipate heat as assistance measure, and the fans maintain full speed (Recommended using a laser tachometer to test the fan speed).ħ. The single-sided test of production must also ensure the formation of air ducts (important).Ħ. When using the chassis cooling function, you must put 3 hash boards at the same time to form air duct. The functional test shall ensure that the double-sided heat sinks are soldered OK and the cooling fan is at full speed. After passing the repair and replacement chip test, you need to check the full chip before performing the functional test. Check the tools, confirm whether the test fixtures can work normally, determine the test software parameters for the maintenance station, and version of test fixtures, etc.ĥ. ![]() Check whether there are any open or short circuits, or missing parts in the replacement parts and the surroundings.Ĥ. There should be no obvious deformation of the PCB board after replacing any accessories. Please pay attention to the operation method when replacing the chip. After repairing, the hash board must be tested to be OK for more than twice, otherwise, it shall be rejected.ģ. Maintenance personnel must have certain electronic knowledge, more than one year of maintenance experience, and be proficient in BGA / QFN / LGA package soldering technology.Ģ. Demand for common maintenance spare materials: 0402 resistance (0R, 33R, 1K, 4.7K,) 0201 resistance (0R), 0402 capacitor (0.1uf, 1uf)ġ. Requirements for maintenance auxiliary materials / tool: low-temperature solder paste Alpha OM550, flux, water for cleaning panel and anhydrous alcohol water for cleaning panel is used to clean up soldering residues after repair thermal conductive paste is used to apply on chips / heat sinks after maintenance (some models require thermal conductive paste) tin-planting steel mesh, ball-planting steel mesh, solder wire, solder ball (ball diameter is recommended to be 0.4mm) when replacing a new chip, you need to plant tin on chip pin and the BSM surface before soldering them to the hash board.ĥ. Testing tool requirements: APW9 + power supply and power patch cord for power supply of hash board 1040 S17+ control board, hash board tester fixture.Ĥ. ![]() heat gun, BGA rework station for chip / BGA disassembly and soldering multimeter, soldering steel pin and shrink tubing for easy measurement ( Fluke 15b+ recommended) oscilloscope (Agilent recommended)ģ. ![]() Constant temperature soldering iron (350–360℃), the head of tip soldering iron is used to solder small patches such as chip resistors and capacitors, etc. Platform requirements: rubber sheet repair workbench (workbench needs to be grounded), anti-static wrist strap and grounding.Ģ. Maintenance Platform / Tool Preparationġ. Please contact Bitmain official customer service if there is any need of reprinting or quoting. The article shall solely be reprinted, extracted or used in any other ways with the permission of the copyright owner. ※ The copyright of this article belongs to Bitmaintech Pte. ![]() Contents of this manual: referring to how to troubleshoot the S17+ hash board and how to use hash board tester to accurately locate it.
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