a-four) Test In the event the pins of the main chip aren't soldered properly (it was found in repair the pins are tinned observing through the aspect, nevertheless the pins will not be stained with tin in the least when the chip is removed)
Considering the serial port log, if 0 chips are still observed at the moment, It will probably be one among the next cases:
Verify the welding high-quality of the heat-sensitive chip and also the compact warmth sink. The deformation of the massive warmth sink substance will bring about lousy warmth dissipation of your chip and have an impact on the temperature big difference. Determine 5-14 four. Phenomenon: One board detection chip will not be total (PT1/PT2 stations) a) Liquid crystal display Display screen ASICNG: if (0), initial measure the overall voltage with the measuring domain as well as Raise circuit 19V is typical, and then use the limited-circuit probe to short-circuit the RO exam level plus the 1V8 examination stage in between the 1st and the second chip, after which you can work This system to find the chip. Looking at the serial port log, if 0 chip remains located at the moment, It will likely be considered one of the subsequent circumstances: a-1) Utilize a multimeter to evaluate if the voltages within the 1V8 and 0V8 test details are 1.8V or 0.8V. If not, it signifies that the one.8V or 0.8V LDO circuit of this area is irregular, or the two ASIC chips of the domain isn't soldered effectively; most of this are caused by brief circuits of 0.8V, one.8V patch filter capacitors (evaluate the resistance in the patch filter capacitors associated with the front and back from the PCBA). a-two) Look at if the circuits of U1 and U2 are irregular, for example resistance welding, and so forth.
three. Make the SD card Based on the necessities. When the hash board is barely set up with a single-sided warmth sink and detect the chip, instantly decompress the compressed offer to produce the SD card;
Normal indicates There exists a issue with chips immediately after 38 chips. Continue utilizing the dichotomy strategy until eventually you discover the problematic chip. Assuming that there is a trouble Together with the N-th chip, then when 1V2 and RO between the N-one and N chips are small-circuited, the N-one chip can be found. But when 1V2 and RO concerning the N and N+1 chips are short-circuited, the complete chip cannot be observed.
c) In the event the hashboard nevertheless shows the X and decreases the hashrate, you could take out the warmth sink in the hash board for mining. If the hashrate is cut down, measure whether the domain voltage is ordinary.
three. Right after repairing, the hashboard has to be examined for a lot more than two moments to generally be OK before it may pass!
Repair approach: Utilizing the dichotomy system, brief-circuit the 1V8 exam issue plus the RO check place among the 38th and 39th chips With all the shorter circuit probe. In case the log can find 38 chips, there is not any challenge with the main 38 chips; if shorter-circuiting the 47th chip, nevertheless the log reports forty sixth, it signifies the 47th chip can not be detected, and there is no trouble Together with the Visible inspection. Commonly, the 47th chip shall be replaced;
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If the large warmth sink substance is deformed, it may cause very poor heat dissipation from the chip and impact the temperature variance.
3. The exam SD card are going to be manufactured As outlined by the necessities, as well as the double-sided warmth sink 8-instances Patter examination needs to make an SD card, as demonstrated within the figure underneath;
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