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Case gears black steel 480W power supply Model # BKS480 I need to find a wiring diagram or what component is at the THR1 location on the circuit board as this component has burned out in mine And I am trying to figure out what type of component I need to replace it very comfortable with soldering the new component in just need to figure out exactly what it is

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Power Surge damage. Suggestions on which part to replace.

I would start looking at the power supply, it's usually a separate board where the a/c line plugs into. In many cases i have seen that the problem you described is from a damaged power supply, sounds like something is shorting causing the power supply to continuously come on and off. I would first check the capictors to see if any of them have blown, usually cylinder looking and sometimes you'll see an X or a K at the top of the cylinder, if it's blown then the top will be bulging out instead of being flat. If all those look good then there is probably a short somewhere else like in one of the transistors, if so you'd be best to just find another power supply board to replace.

Posted on Nov 09, 2007

worldvet
  • 859 Answers

SOURCE: Power Surge damage. Suggestions on which part to replace.

You probably have a sacrificial diode that blew out to save the rest of the monitor from further damage. The manufacturer should replace it with a refurbished one at little and sometimes no charge (comparatively speaking).

Posted on May 10, 2008

  • 1 Answer

SOURCE: Schematic and/or wiring diagram - Magnavox TV Mod 20ms233s

the problem in my tv is the sound no have

Posted on Jul 04, 2008

  • 1 Answer

SOURCE: power supply for gateway

This power supply has an odd form factor so just "any" power supply won't work.

Posted on Oct 03, 2008

SOURCE: need circuit diagram for bush

Diagrams i am sure as you know are not always easy to come by, at least for free. I see that there are available boards online and a company that will rebuild this model of power board for you in UK. ohmsupplies.co.uk is where it is at. looks like $80

Posted on Oct 16, 2008

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I need a replacement Sunbeam/Black Steel 480W Power Supply made by casegears


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I know the circuit diagram but how do you


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Hi,
The fault is probably at either end. Yes, it could have been reversed, but most radios are easily protected against this.

If you are getting no lights or anything when keying mic, then there may be an inline fuse along the cable. As you are getting continuity, open the case up, and look for any evidence of heat at the components nearest the power supply - particularly the protection diodes - Black cylinrical components with a silver band.

You really need a meter or scope to go in much further, and check supply voltages between components and -ve, and downloading a copy of the circuit diagram will help this.

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Of course - the "on" light could have blown, so may be functioning without indications, - but I doubt it.

Also check Mic outputs on the plug to make sure that is working. Some units won't function if this is disconnected.

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