Author Topic: Desktop PC Power Supply - FORGE  (Read 735 times)

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Offline 2XTopic starter

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Desktop PC Power Supply - FORGE
« on: June 15, 2020, 06:37:55 pm »
Hi,
I had a power supply from a desktop PC where the 3.3V volt was 3V. After I measured the components that involved in 3.3V output and was ok (resistorw caps and diodes) and I decided to disconect the resistor where parallel with the output capacitor and worked fine... the resistor was the right value (according to the colours which had on it) when I measured with the multimeter... finally I put a 33ohm resistor (yellow circle) and works fine and the PC starts ok and keeps the 3.3Volt now. Does anyone know which is the use of these resistors at the output capacitors on 3.3V, 5V & 12V (yellow and red circles)?

 

Offline TheMG

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Re: Desktop PC Power Supply - FORGE
« Reply #1 on: June 16, 2020, 02:48:57 am »
What was the original value of the resistor?

Those resistors are there to ensure a minimum load on the outputs of the power supply.

The fact that you changed the resistor value and now it works, is just a symptom of some other problem.
 

Offline 2XTopic starter

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Re: Desktop PC Power Supply - FORGE
« Reply #2 on: June 16, 2020, 08:15:09 pm »
What was the original value of the resistor?

Those resistors are there to ensure a minimum load on the outputs of the power supply.

The fact that you changed the resistor value and now it works, is just a symptom of some other problem.

The old resistor was 10ohm. With multimuter I measured 8ohm. The new one that I put was 33ohm. Thanks a lot for the reply.
 


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