Author Topic: Velleman PS3005d fan doesn't spin  (Read 894 times)

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Offline Burgija

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  • Country: cs
Velleman PS3005d fan doesn't spin
« on: August 23, 2016, 09:43:45 am »
Does anybody knows why my cooling fan is not spinning? I have checked it outside of the case and it works fine, but when inside - heatsink get very hot but fan stays off.

Others have problem with a noisy fan but I wish mine worked anyhow.

Any suggestions?
 

Offline singapol

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Re: Velleman PS3005d fan doesn't spin
« Reply #1 on: August 23, 2016, 10:58:01 am »
Download the schematics and unzip them. Wait for "Processing" to change to "Get manual".
Looks like there may be fault at U12 (switching ,see fan signal) or the relays.See the main schematic. :)

http://elektrotanya.com/korad_ka3005p_velleman_labps3005d_power_supply.zip/download.html
 
The following users thanked this post: ProBang2, Burgija

Offline Burgija

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  • Country: cs
Re: Velleman PS3005d fan doesn't spin SOLVED
« Reply #2 on: August 23, 2016, 07:37:53 pm »
It was the fan.
But on the picture attached you can see two resistors on main board that are not in schematic.
One of the resistors is slightly beat up and the pcb underneath is little bit burnt.
It seems like the fan coils got shorted and as a result was drawing more current.

Thank you singapol
« Last Edit: August 25, 2016, 07:17:22 am by Burgija »
 


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