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  #1  
Old 01-04-2019, 02:57 AM
Aesgarth Aesgarth is offline
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Default Control 24 power supply failure - blown resistor

Can anyone tell me the value of R1 on the control 24 power supply board? (the skynet version) - I've been asked to attempt to repair one and R1 has obviously blown, to the extent that I can't read the details off it. I've attached a photo.

I realise the resistor is likely to be a symptom rather than the cause of the failure but all the other components appear ok, from a quick visual inspection.
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Old 01-04-2019, 06:30 AM
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crizdee crizdee is offline
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Default Re: Control 24 power supply failure - blown resistor

Quote:
Originally Posted by Aesgarth View Post
Can anyone tell me the value of R1 on the control 24 power supply board? (the skynet version) - I've been asked to attempt to repair one and R1 has obviously blown, to the extent that I can't read the details off it. I've attached a photo.

I realise the resistor is likely to be a symptom rather than the cause of the failure but all the other components appear ok, from a quick visual inspection.
Hi,

Ive got a spare in front of me but there's no way to view any values on it, ive tried close up photos from both sides but nothing viewable i'm affraid.

Unless i can somehow measure mine for you.

Ive got various documents for the control 24 but no schematic unfortunately.


Chris
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Old 01-07-2019, 01:09 AM
Aesgarth Aesgarth is offline
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Default Re: Control 24 power supply failure - blown resistor

If you have a multi-meter available to you, and could test the resistance of R1 that would be immensely helpful.
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Old 01-07-2019, 08:24 AM
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Default Re: Control 24 power supply failure - blown resistor

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Originally Posted by Aesgarth View Post
If you have a multi-meter available to you, and could test the resistance of R1 that would be immensely helpful.

Hi,


Ok i tried to measure it on the boards obviously. It seems to be a Varister not a resister... google search suggests it should be removed to read correctly. my meter reads at 200 or 2000 and at the 2000 settings it is showing variable resistance but seems to favor around .400 to .500 but it does move around a lot.




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Old 01-08-2019, 02:19 AM
Aesgarth Aesgarth is offline
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Default Re: Control 24 power supply failure - blown resistor

Thanks for that. Can you confirm that the one in your board looks similar to the blown one in my picture?

if it does then I think it's a 10SP010 Thermistor to limit inrush current.



Unfortunately I think I have bigger problems than that as I have continuity between +5v and GND pins
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Old 01-08-2019, 02:32 AM
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Default Re: Control 24 power supply failure - blown resistor

Hi,


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