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тАО07-09-2013 07:16 AM - last edited on тАО02-15-2017 07:16 AM by Parvez_Admin
тАО07-09-2013 07:16 AM - last edited on тАО02-15-2017 07:16 AM by Parvez_Admin
Re: KVM - Power Supply problem
PSU Power Supply Repair, Exchange & Recycling Service
HP & DELL KVM
336045-B21 396631-001 340387-00
336044-B21 396630-001 340386-001
396631-001 340387-001
180AS 2160AS KVM RP163 PY252 W7941
DVE DSO-142L Tamura Personal Info Erased
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тАО11-22-2013 05:41 AM
тАО11-22-2013 05:41 AM
Re: KVM - Power Supply problem
I need know this solution please
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тАО07-14-2016 12:58 AM - last edited on тАО02-15-2017 07:18 AM by Parvez_Admin
тАО07-14-2016 12:58 AM - last edited on тАО02-15-2017 07:18 AM by Parvez_Admin
Re: KVM - Power Supply problem
I am experiencing the same issue with multiple devices. Did you ever find a solution?
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тАО07-14-2016 04:34 AM
тАО07-14-2016 04:34 AM
Re: KVM - Power Supply problem
Hello there
As I wrote in my post earlier, you will have to repair or replace the power supply. Most likely the problem are the electrolytic capacitors. If you have experience in soldering you can do that yourself.
If you are in Switzerland or not too far away from it, you could send me the unit for a cost estimate and repair. But keep in mind that such devices can be bought relatively cheap at the hardware broker market.
Or you look for an electronics repair guy near to you....
"If it seems illogical... you just don't have enough information"
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тАО02-02-2017 12:57 PM
тАО02-02-2017 12:57 PM
Re: KVM - Power Supply problem
Hi i have 3 KVM and the power supply is not working can anyone help me Please, i have a home network and i cannot pay $150. and more to get them repaired
I would appreciate and help.
Thank you Ken
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тАО02-03-2017 12:46 AM
тАО02-03-2017 12:46 AM
Re: KVM - Power Supply problem
http://www.instructables.com/id/Repair-your-electronics-by-replacing-blown-capacit/?ALLSTEPS
This is a good repair instruction. It's not a KVM Switch but the problem may be th same and the way to repair is identical. I would change ALL the capacitors regardless of how they look. Sometimes even the perfect looking ones can be bad. Fortunetely the most expensive ones (rated 200V to 450V) at the primary side of the power supply are in most cases not faulty. Make sure that you also replace the very small ones especially those next to the control chip. The look innocent but sometimes they are the only problem.
Also check the fuse first. Sometimes it's only the fuse...
Many KVM Switches have standard industrial power supplies inside. Look at some electronics distributors for a power supply with the same voltages, currents and size. You may find one that fits exactly. The downside is that these P.S. will cost about $30 to $50 per piece.... saving money can become difficult.
"If it seems illogical... you just don't have enough information"
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тАО02-11-2017 05:59 PM
тАО02-11-2017 05:59 PM
Re: KVM - Power Supply problem
Ok so i though i could go with a Mean Well Model: RS-15-5 , and it should have all the specs i need , well no they don't work on all 3 KVM , so i looked into getting the caps i need and what should i say , i have looked throw 20 Caps company pages and have only found 1 cap match it is always the size that does not match , would you know where i can get them ? it looks like i need (3) 47uf 25VDC 17mm x26mm , ( 3) 2200uf 10VDC 10mm x 25mm , (9) 470uf 10VDC 6.3mm x 15mm ,
Thank You
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тАО03-17-2017 03:10 AM
тАО03-17-2017 03:10 AM
Re: KVM - Power Supply problem
I have in the past got caps from here...
https://www.digikey.ca/products/en#cat-3
I know they do list dimensions. I have also had luck on ebay for a cap I needed for my daughter's CD player.
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тАО03-17-2017 03:20 AM
тАО03-17-2017 03:20 AM
Re: KVM - Power Supply problem
I just found this listing all specs and parts.
I know it will help me as some caps are hard to read on board when I want to find replacements.
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тАО03-21-2017 06:43 AM - edited тАО03-21-2017 06:50 AM
тАО03-21-2017 06:43 AM - edited тАО03-21-2017 06:50 AM
Re: KVM - Power Supply problem
It seems someone made a great effort to draw this manual.
One little correction about the capacitor lifetime. A lifetime of 10 000 hours seems not very much. But keep in mind that those 10 000 hours are calculated at a temperature of 105 degree C (or whatewer your cap is rated). If the operating temperature is less than that, the lifetime will be much longer.
In fact a 10 000 hour cap is not too bad at all. The problem is that cheap, noname, crappy caps are used for cheap and crappy power supplies. I suspect this is done deliberately to make them fail shortly after warranty runs out.
I had a Fortinet firewall with a failed P.S. last month. They used 3 good quality NipponChemicon caps and one noname. Guess which one failed...?
Why is an engineer doing that? Why does he choose 3 good ones and one bad one?
I recommend to use 105 deg C capacitors. (Panasonic or NipponChem) The 85C caps will not live very long in such a dense populated power supply. 105C is standard with all PC and server applications. (power sup./mainboard)
"If it seems illogical... you just don't have enough information"
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