2026-09-20 14:11 UTC
Bringing up the final batch of two scope / probe demo boards.
On s/n 002, all of the power rails come up and are within range, and the supervisor flashed fine, but the FPGA doesn't show up on JTAG.
Gonna run another reflow cycle and hope that fixes it. No visually evident defects, chip isn't getting hot, and JTAG pins all have plausible resistances to ground.
Replies (1)
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@azonenberg@ioc.exchange 2026-09-20 14:14
The solder paste print on this batch also wasn't great which is certainly a potential issue. I had to clean both boards and re-paste them before I was somewhat satisfied with the results. But this definitely shows that something about the kibbyshop process is not as dialed in as what I have at home.