| Electronics > Repair |
| Can this Noctua 12v Fan be fixed? |
| << < (3/9) > >> |
| enut11:
--- Quote from: floobydust on July 30, 2024, 06:02:29 pm ---OP the PCB trace along the outside edge looks quite carved up, make sure it's not open circuit. The IC looks JEITA, it's not an SO-8 with the straight leads and pics of the NE-FD1 are gull wing. Any idea what the SC-70 part number is, what it's doing. --- End quote --- The outer track in OK, just my ham-fisted approach to removing the PCB assembly. 'SC-70'? not sure what you are asking |
| floobydust:
--- Quote from: enut11 on July 30, 2024, 09:35:10 pm ---The outer track in OK, just my ham-fisted approach to removing the PCB assembly. 'SC-70'? not sure what you are asking --- End quote --- see pic |
| thm_w:
This fan was released in 2018 or 2019, warranty 6 years, surely it was still under warranty? |
| fzabkar:
--- Quote from: enut11 on July 30, 2024, 09:52:46 am ---@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. :( --- End quote --- Let me try. I think that IC1 is a 2-phase brushless DC motor driver with on-chip Hall sensor, PWM control input and tacho output. 8/ Config / Mode #1 7/ Config / Mode #2 6/ Ground / V- 5/ V2 -- motor phase #2 4/ V0 / V+ -- positive supply to motor and PCB 3/ V1 -- motor phase #1 2/ S -- speed sensor output ?? 1/ P -- PWM input ?? I suspect that R2, R3, R4 are configuration or mode select resistors or shorting links. |
| enut11:
--- Quote from: thm_w on July 31, 2024, 12:14:05 am ---This fan was released in 2018 or 2019, warranty 6 years, surely it was still under warranty? --- End quote --- I am not the original owner and do not have the receipt. Also, cost of postage from Australia could exceed its value. |
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