Details, Fiction and s19 hash board repair

In the event the link is Alright, the consumer can take a look at The only board PT2 to check if it might pass the check. If it passes the test, it may essentially be determined that the challenge is within the Management board. Should the examination fails, make use of the PT2 repair process to repair it.

Weak chip soldering or damage to the chip capacitor or resistor, or irregular resistance generally leads to The problem.

c) Liquid crystal display Display screen ASIC113: (Reporting 113), it ensures that the hash board can detect 114 chips at 115200 baud rate, but only 113 chips are uncovered at 12M baud amount, and a single chip could not be found at 12M baud fee; Repair process: Using the dichotomy process, shorter-circuit the 1V8 test point along with the RO examination place amongst the 38th and 39th chips While using the brief circuit probe. When the log can discover 38 chips, there isn't any problem with the first 38 chips; if short-circuiting the 47th chip, though the log stories 46th, it implies which the 47th chip cannot be detected, and there's no problem with the Visible inspection. Generally, the 47th chip shall be replaced; Determine 5-15 d) Liquid crystal display Exhibit ASICNG: (X, a particular chip is fixedly documented), There's two conditions: d-one) The primary situation: the exam time is basically similar to The nice board (usually the worth of X is not going to alter each time you test) (check time refers to the time from when the start test button is pressed to time when the results of ASICNG: (X) is shown to the Liquid crystal display). This example is probably going to generally be caused by the abnormal resistance welding of the entrance and rear CLK, CI, and BO of your Xth chip, so people shall deal with these six resistors. The small chance is due to X-one, X, X+one, that may be, Among the many three chips, the following pins irregular welding problems in the chip manifest: Figure five-sixteen d-2) The next circumstance: the exam time is almost 2 times as long as The nice board (in some cases the worth of X will adjust anytime you examination, and from time to time X=0); at the moment, the log usually has the next information (the purple quantity just isn't thirteen sometime, based upon which seat the hash board tester is connected to); during the take a look at, assume which the domain voltage of every one of the fields in front of the abnormal position is almost below 0.3V, along with the domain voltage with the again fields are Virtually all better than 0.34V. This case is because of the chip not staying soldered well, generally one.8V, 0.8V, RXT, CLK usually are not soldered nicely. It is usually recommended to immediately evaluate the area voltage to Identify which area is the trouble. The 1V8 and RO small-circuit approach used in segment a) also can locate the abnormal place;

Repair system: throughout the PT2 examination, Look at the serial port print log. When the serial port starts to function for your long time, use a short-circuit probe to short-circuit RO&one.

As for The difficulty which the Regulate board cannot start (not networked), the person needs to interchange the U1 (key Management IC FBGA of Manage board). U1 can no longer be Employed in 19 sequence just after substitution

three. Listen on the soldering method when replacing the chip. After replacing any extras, the PCB board will not be deformed. Check the replaced pieces and surroundings for missing pieces, open circuits and short circuits.

4. Make the SD card In accordance with the requirements, double-sided heat sink, eight instances Parrer test, you'll want to make the SD card as proven in the determine underneath:

8. To interchange a whole new chip, printing pins and soldering paste are expected in order that the chip is pre-soldered after which you can soldered to your PCBA for repair

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(2) Much less chains: it Price Here ensures that on the list of three hash boards is lacking. In cases like this, nearly all of the issues are due to the connection concerning the hash board along with the Manage board. Verify whether There may be an open circuit during the cable.

Pre-tin the chip pins with solder paste to interchange a different chip after which solder them for the PCB for repair.

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② The second scenario: Micro-brief circuit involving alerts (0-numerous ohms), because of the little resistor worth of the chip pins, to start with use a heat gun to solder and see if it is OK;

Continue on to research with dichotomy until finally the problematic chip is found. Assuming that there's a issue While using the Nth chip, if the 1V8 and RO between the N-1th and Nth chips are shorter-circuited, N-1 chips are available, but in the event the 1V8 and RO amongst the Nth and N+1th chips are short circuited, all the chip can not be observed.