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a-four) Check if the pins of the primary chip are not soldered nicely (it was found in repair which the pins are tinned observing within the aspect, although the pins are certainly not stained with tin whatsoever when the chip is taken out)

It is recommended to employ 6AWG copper wires having a length of under 60cm with the hash board powering.

Do-it-yourself creation of electric power adapter cable: Use thick copper wires to attach the beneficial and damaging poles of the power offer to the ability offer and hash board. It is usually recommended to employ 4AWG copper wire using a size of less than 60cm to the hash board electric power.

Measure whether or not the area voltage is usual. Frequently, the area voltage will be abnormal from the problematic domain. Then evaluate the RI signal to check out if the RI sign is damaged. If the RI signal is missing, generally, the chip is brief-circuited or broken right after remaining tinned.

③ Use a multimeter to measure the resistor of R8 or R9 to view if it is within ten ohms, plus the looking at will not jump randomly. Otherwise, exchange the two resistors;

In the event that multiple chips in precisely the same area Have a very reduced reaction level, the just one with the lower nonce in that domain really should get replaced.

Routine maintenance process: In the course of the PT2 exam, think about the serial port print log. It is generally due to an error while in the register handle of a specific chip. Just replace the BM5 Contact Here chip as shown in Determine 5-19 (asic commences from 0).

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a-four) Look at if the pins of the initial chip are soldered well (it absolutely was discovered through repair that the pins are tinned observing in the side, though the pins are usually not stained with tin at all in the event the chip is removed)

● The repaired hashboard is often judged as a very good item with in excess of two passes when testing With all the hashboard tester. For The very first time, after changing the areas, anticipate the computing board to cool down, use the hashboard tester to test, and once the examination is handed, set it apart then cool it down. For the second time, following a couple of minutes once the hashboard cools down, examination yet again.

If there is not any issue With all the relationship, you may complete the PT2 test on the single board to check whether or not the examination can move. If it might be passed, probably the Management board is defective. If your check fails, make use of the PT2 maintenance approach to repair.

c) Liquid crystal display Exhibit ASIC75: (Reporting seventy five), it implies that the hash board can detect 76 chips at 115200 baud fee, but only 75 chips are found at 12M baud level, and a person chip couldn't uncover at 12M baud charge; Repair approach: Utilizing the dichotomy system, limited-circuit the 1V8 examination position plus the RO check level among the 38th and 39th chips with the brief-circuit probe.

In keeping with this process, find the chip that also has the long-term running failure following a particular chip is brief-circuited. Generally, it's attributable to a specific chip damaging, so just substitute it; Figure 5-20 7. Phenomenon: PT1 chip check is Okay, PT2 purpose test usually studies a particular chip NG;