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How to use the Avalon debug D signal short circuit board?
Purpose of the Avalon debug D signal short circuit board:
When testing an Avalon single-hash board, the test fixture reports 0 or the number of chips is incomplete, and the Avalon debug D signal short circuit board can be used to locate the faulty chip quickly.
When in use, you only need to press the switch, short-circuit the clip to connect to the D signal on the board, and you can replace the oscilloscope to find the fault point, which is very convenient to use.
Avalon debug D signal short circuit board applicable models:
Avalon A10 series, A11 series, A12 series
Avalon debug D signal short circuit board interface description:
①: Short-circuit the positive pole, connect the D signal test point that the chip needs to be short-circuited
②: Short-circuit the negative pole, connect the negative pole of the power supply where the chip signal to be short-circuited is located, which is the domain voltage Vcore)
③: Test fixture cable interface (two data interfaces)
④: Hash board cable interface (two data interfaces)
⑤: Pull the switch:
Open: The normal test mode is the same as the function when the fixture is not connected to this small board.
Press: short-circuit search mode, find the number of chips through the short-circuit clip (the cable should also be connected to the hash board)
⑥: Short-circuit clip interface
⑦: Data cable
⑧: 12V power interface
Avalon debug D signal short circuit board applicable instructions:
1. When the Avalon board test shows asic count: 0;
First, connect the D signal short circuit board to the Avalon hash board as shown above, press the switch on the short circuit board, and the shorting clip randomly shorts the D signal from the D signal transmission direction to locate the faulty chip.
2. When the Avalon single board test shows asic count: 10, it means that the hash board lacks chips;
Short-circuit the D signal output by the A16 chip, and the test fixture displays asic count: 10. It should be noted that the correct number of chips is 16-6=10 because there are no soldered chips in the first 6 A1-A6 positions of the test board. At this time, the number reported in the log is the same as the number of chips before the short-circuit signal, indicating that the first 10 chips are normal. Therefore, we need to continue the short circuit check until we find the chip without a D signal to locate the faulty chip.
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