Products > Test Equipment

Siglent SDS1000X HD 12bit DSO's

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hansibull:
Replacing the fan with a Noctua one is a quick job. But it would be interesting to know if the scope actually had built-in automatic fan control. To me, it looks like it's all there! Just curious, why didn't you check if you could connect your Noctua fan straigt to the motherboard?

Martin72:
I hadn't thought about it because it seems illogical to me to generate a fan controller on the board, but then install a non-controllable fan for “cost reasons”.
In other words, I don't believe that a fan controller exists on the board.
You can measure it if you have a second scope available.

tszaboo:

--- Quote from: Martin72 on September 03, 2024, 07:01:32 pm ---I hadn't thought about it because it seems illogical to me to generate a fan controller on the board, but then install a non-controllable fan for “cost reasons”.
In other words, I don't believe that a fan controller exists on the board.
You can measure it if you have a second scope available.

--- End quote ---
The "controller" is just a PWM signal with 5V pullup to tell the fan how fast to go. By the looks of it the circuit is right next to it on the picture, that SOT23.

Martin72:
That's why I wrote that he should measure.

KungFuJosh:
If the better fan costs 40 cents more, and the 4-pin connector costs 10 cents more, then multiply that 50 cents by 100,000 units or whatever they sell, and it adds up fast. 🤷

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