| Electronics > Repair |
| Can this Noctua 12v Fan be fixed? |
| (1/9) > >> |
| enut11:
My 120mm Noctua fan died. It was great while it was working, efficient and relatively quiet. Since they are expensive, I decided to have a go at fixing it. There are lots of YT video on fan repairs but when I pulled mine apart I did not see the familiar 3pin Hall chip but rather an 8 pin IC. There are no markings on the chip apart from an embossed square in one corner. Not familiar with Hall chips so looking for tips on how to trouble shoot this circuit. enut11 |
| enut11:
Powering the PCB from a current limited 12v supply shows up as a short or very low ohms circuit. All the discrete components tested OK. The two coils both tested at around 36ohms so that seems OK. Sounds like the 8 pin chip is dead but not knowing the pin-outs makes it difficult to test further. Any suggestions before I pronounce it dead and unrepairable? enut11 |
| RoGeorge:
--- Quote from: enut11 on July 30, 2024, 08:35:52 am ---Any suggestions --- End quote --- In case you don't find a replacement for the dead component, maybe try to fit an entire PCB taken from another cheap/used 4 wires fan. The low noise of a Noctua comes mostly from the mechanical parts, coils might not be much different from the coils of an ordinary fan. Chances are it might work, but I never tried, only speculating. |
| magic:
--- Quote from: enut11 on July 30, 2024, 08:35:52 am ---Sounds like the 8 pin chip is dead but not knowing the pin-outs makes it difficult to test further. --- End quote --- It's a single layer board, come on. I can figure out most connection even from your photo. |
| enut11:
@magic, quite right, it would be relatively easy to trace out the circuit. However, I just found out that Noctua use a proprietary chip in their fans. :( |
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