HM Tech LLC By - Whatsminer Repair

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(No Transcript)
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Whatsminer's Power Supply Fix Guide

• The circuit outlines of Whatsminer's power
  supplies have been
• requested previously, however there are not many
  such records
• available. I tracked down an article on zeusbtc
  on the most proficient
• method to fix what excavator's power supply. So I
  need to impart it to
• you here, if have any inquiries, kindly point out
  to help.

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• 1. Update the power open firmware
• No voltage yield when turned on alone. Interface
  the control board to the power supply and update
  the devoted firmware for the control board.
  Subsequent to restarting the test, the power
  supply will have a typical voltage yield.

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• 2. Unusual voltage
• Eliminate the power supply screws first, then
  take out the circuit board and eliminate the fan.
  Utilize a multimeter to gauge whether the
  positive and negative shafts of the result
  terminal are shortcircuited. In the event that
  there is no short out, measure whether there is a
  voltage input. The info voltage is for the most
  part estimated on the two pins of the mass
  capacitor.
• Measure whether the info voltage is around 420V.
  If by some stroke of good luck estimated around
  300V. This shows that there is no strain ascend
  in the PFC. For security, the capacitor should be
  released and resulting step estimations were
  taken.

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• To start with, check the control chip circuit for
  shortcircuits or unfortunate welding. VCC
  supplies capacity to the control board chip
  circuit, so check whether the VCC power supply is
  ordinary.
• Measure whether the diode triode of the VCC
  circuit is standard. On the off chance that it
  doesn't work, it ought to be supplanted.
  Nonetheless, after the power-on estimation, the
  VCC voltage continues to beat, and the VCC
  circuit doesn't work. Thusly, since VCC is
  redressed by numerous diodes and results various
  arrangements of voltages, if it's not too much
  trouble, release the Capacitor subsequent to
  controlling off. In this way, it is important to
  quantify whether every rectifier diode is working.

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• After the estimation, in the event that the
  channel capacitor is shortcircuited, it truly
  intends that there is an issue with the rectifier
  yield. The estimation semiconductor works. The
  diodes are on the front side and covered with
  stick. Need to pry the paste substitution, and
  supplant it with new diodes. Measure after
  substitution to affirm that there is no short
  out.
• At long last, complete the power-on test to
  affirm that the result is typical and the
  shortcoming is disposed of.

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• 3. The fan is running regularly, yet the result
  voltage is unusual
• Utilize the dark test lead of the multimeter to
  ground, and the red test lead to gauge a similar
  pin places of the four driver chips and look at.
  Typically, the worth of a similar pin of the chip
  is something similar. In the event that the pin
  position and the ground esteem are very unique,
  the IC driver circuit might be shortcircuited.
  Assuming there is no indication of consuming on
  the outer layer of the chip, it is possible that
  the MOS tube it drives is shortcircuited.
  Eliminate the intensity sink of the MOS tube.

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• Utilize the diode stuff of the multimeter to
  quantify the fourth pin (control pin) of the MOS
  tube. Find the shorted MOS tube. The fourth pin
  of the typical cylinder is around 0.57V. Switch
  the multimeter to the obstruction stuff, and
  measure the strange gathering of the fourth pin
  of the MOS tube. In the event that there is more
  than one harm, it should be supplanted.

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• 4. Voltage yield decrease
• On the off chance that the fan isn't working,
  make sure that the fan link is connected
  appropriately. Or on the other hand see whether
  the fan speed is excessively quick. The fan is
  turning excessively quick because of the great
  temperature. The power supply is locked to
  safeguard itself, so there is no result.

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• Check the fan drive circuit to check whether the
  temperature-detecting wires on the four intensity
  sinks are free. The shortcoming of the digger is
  a fan issue or a temperature issue. Actually look
  at the significant line. In the event that
  everything is good to go with the temperature
  control on the heatsink, there might be an issue
  with the chip program. You might have to reset
  the firmware.

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• Hash with the Master
• A full service Data Center designed around a
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• and Blockchain model. We have seen consistent
  growth for over 5
• years and provide best in class technical
  expertise ranging over 40
• years of similar infrastructure development. We
  are the Hash
• Master of the eastern United States.  

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