7. After repairing the hash board, the thermal gel about the drinking water cooling board should be eliminated and reprinted.
Very poor chip soldering or damage to the chip capacitor or resistor, or irregular resistance usually brings about The difficulty.
Examine the welding good quality of the warmth-delicate chip and the tiny heat sink. The deformation of the large heat sink materials will lead to very poor warmth dissipation from the chip and have an effect on the temperature variance. Figure 5-14 four. Phenomenon: One board detection chip will not be total (PT1/PT2 stations) a) LCD Display screen ASICNG: if (0), to start with evaluate the full voltage with the measuring domain as well as Increase circuit 19V is regular, and afterwards make use of the brief-circuit probe to brief-circuit the RO check position as well as the 1V8 examination place in between the 1st and the 2nd chip, then run This system to find the chip. Investigating the serial port log, if 0 chip remains to be discovered presently, it will be certainly one of the next scenarios: a-1) Make use of a multimeter to evaluate whether the voltages at the 1V8 and 0V8 test points are 1.8V or 0.8V. Otherwise, it suggests the 1.8V or 0.8V LDO circuit of this domain is irregular, or the two ASIC chips of the domain is just not soldered well; most of this are because of quick circuits of 0.8V, 1.8V patch filter capacitors (evaluate the resistance of the patch filter capacitors relevant to the back and front on the PCBA). a-two) Examine if the circuits of U1 and U2 are abnormal, including resistance welding, and so forth.
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Use the hashboard tester with the V2.2010 control board. The positive and damaging poles with the tester should be put in with discharge resistors. It is usually recommended to make use of a cement resistor of twenty five ohms and more than 100W.
Pattern NG is a result of the massive difference between the qualities with the chip and other chips. At present, it really is discovered that the chip die is damaged, so just change the chip. According to the log details, the replacement regulations are as follows:
Test the resources to make sure that the exam fixture can operate typically. Determine the parameters of the maintenance station check software, the version with the exam jig, and also other similar parameters.
(one) A unexpected ability outage or lower than thirty seconds in the course of the entire process of opening OTP will lead to the Handle board to fail to open up the OTP purpose as well as Regulate board will not likely get started (not hook up with the Internet).
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When using the chassis to dissipate warmth, 2 hashboards should be placed simultaneously to kind an air duct. The one-sided test in the production also needs to make sure that the air duct is shaped (significant).
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2) A lot less link: Much less url refers to that Among the many three boards, one piece is missing. Typically, there is a problem With all the connection in between the hashboard plus the Command board. Look at the cable to check out when there is an open circuit.