It could be a voltage spike or it could be the fuse just not up to the job. I had a Samsung SSD drive that did the same, except there the fuse was a small IC. I just bridged it, and it has been working ever since.
This is an interesting question. I got this HDD without knowing its history. The voltage peak is probable, because a zener diode or suppressor diode is usually connected in parallel to the supply line as protection, so an overcurrent can develop that melts the fuse. In the video, I changed the fuse of the 5V circuit. According to my measurements, there is a normal current of around 0.3A, which is not very significant.
Maybe, but there are manufacturers who use the "O" symbol for smd fuses. www.aolittel-china.com/one-time-slow-blow-surface-mounted-fuse.html Unfortunately, I could not identify the original "XH" or "HX" mark, it can be fast, slow, pulse-resistant, resettable, from 1.5A to 5 amperes. SMD coding is a mystery. For sure, I have already ordered a new 2A fuse, I hope it will last a long time.
Yes, this was a zero ohm resistor. I replaced it and then tested it with lab power. It hasn't burned out from 10A yet. 🙁 It seems that they were only used as jumpers in Fujitsu. 2:47
It could be a voltage spike or it could be the fuse just not up to the job. I had a Samsung SSD drive that did the same, except there the fuse was a small IC. I just bridged it, and it has been working ever since.
This is an interesting question. I got this HDD without knowing its history. The voltage peak is probable, because a zener diode or suppressor diode is usually connected in parallel to the supply line as protection, so an overcurrent can develop that melts the fuse. In the video, I changed the fuse of the 5V circuit. According to my measurements, there is a normal current of around 0.3A, which is not very significant.
I think the part you installed is a zero ohm resistor, not a fuse.
Maybe, but there are manufacturers who use the "O" symbol for smd fuses.
www.aolittel-china.com/one-time-slow-blow-surface-mounted-fuse.html
Unfortunately, I could not identify the original "XH" or "HX" mark, it can be fast, slow, pulse-resistant, resettable, from 1.5A to 5 amperes. SMD coding is a mystery. For sure, I have already ordered a new 2A fuse, I hope it will last a long time.
Yes, this was a zero ohm resistor. I replaced it and then tested it with lab power. It hasn't burned out from 10A yet. 🙁
It seems that they were only used as jumpers in Fujitsu. 2:47