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| Jean Pierre Daviau <j4e8a16n@gmail.com>: Aug 13 11:49PM -0700 I am looking for the scematic of the RAIDMAX ATX12V AT2005b 380W Power Supply. Inadvertently, I shorted the green wire to a live ground. Sparks occurred on the board around 470u 16v capacitor. I replaced it but othe components may have been destroyed. Here: https://www.dropbox.com/s/tas1k9r9w57dsz2/atx%20photo%20web.jpg?dl=0 The item with a check mark has been checked or replaced. 2- Somebody knows what is the value of the fuse? 1- Somebody knows what is the type (transistor?) of the #1 component ? It exploded and I can only see the numbers 80. Is ir a transistor, a voltage reference, ? Any clue is welcomed. Greetings, JPD |
| Jean Pierre Daviau <J4e8a16n@gmail.com>: Aug 13 11:57PM -0700 Le mercredi 14 août 2019 02:49:57 UTC-4, Jean Pierre Daviau a écrit : > Any clue is welcomed. > Greetings, > JPD 500W instead of 380 watts |
| ggherold@gmail.com: Aug 14 06:42AM -0700 On Wednesday, August 14, 2019 at 2:49:57 AM UTC-4, Jean Pierre Daviau wrote: > Any clue is welcomed. > Greetings, > JPD You might try contacting the manufacturer. If you get the right tech person they are often very helpful. George H. |
| bruce2bowser@gmail.com: Aug 13 12:19PM -0700 On Tuesday, June 2, 2015 at 10:04:19 PM UTC-4, micky wrote: > Am I correct, about radios in general and probably about this, that 80 > or 90% of the power is used in the last stage, the stage that powers the > earbuds (or the speakers in a radio) Gross Tet !! I just saw a lady drop an ear bud and pick it up off of the floor and put it back in her ear !! |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Aug 14 04:13AM -0700 Let's get to first principles: I keep an 11-tube tuner that draws about 60 watts and is fused with a 3/4A dual-element fuse. Matching to it is a 35 watt (2 x 17.5) 6-tube power-amp that is fused at 1.5A. It is a Class A/B device. Yes, the part that moves the air takes most of the power. Now - digital radios are all/nothing devices. The term is 'cliff effect', there is no fading, it just drops off the cliff. The power-amp part is probably a Class D device. Meaning it only draws power when it is passing signal making it about 90% efficient. So, at no-signal conditions, the radio section is still drawing 100% of its necessary power, the amp is drawing (very nearly almost) nothing. But, if you are making your ears bleed, the amp section will be drawing much more than the radio section. Phil's piece of string is an apt analogy. Peter Wieck Melrose Park, PA |
| bruce2bowser@gmail.com: Aug 14 05:32AM -0700 Broadcast and reception take a lot of power if you're planning that through an MP3 but, yuck !! Re-using earbuds off of the floor, ewww!! |
| Tim R <timothy42b@aol.com>: Aug 14 05:47AM -0700 On Wednesday, June 3, 2015 at 12:05:57 AM UTC-4, Phil Allison wrote: > Got any more boring, silly questions ? > .... Phil Phil, you don't know micky very well, do you? |
| tabbypurr@gmail.com: Aug 13 04:31PM -0700 > Best of luck! > Peter Wieck > Melrose Park, PA Could also be due to arcing. Which may well be stoppable at this stage by washing the affected area and drying very thoroughly. NT |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Aug 14 04:00AM -0700 Might be Martian invaders.... Peter Wieck Melrose Park, PA |
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