Fried dcx |
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Sypa
Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921 |
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Posted: 09 June 2018 at 7:27pm |
But not eggs, it seems some whiskey coke got in the power sockets
Only visible damage https://ibb.co/m22y58 Bin it or no? I dontd have a multimeter atm to check the fuse, the fuse socket was completely soaked tho.
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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Rust across a large section of the board? Good luck! Worst case scenario keep it for parts. If the same happens again having a nearly functional spare like this one would be exactly what you need, and probably your best chance at fixing this one (finding another dead unit and gutting it).
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Time to upgrade from DCX, to a DBMark DP 4/8 MKIV. |
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Global Depopulation - Alive and Killing.
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Sypa
Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921 |
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Upgrade is in process for months now still looking for a suitable replacement and saving ££
This one was on install duty . Another one already replaced it haha. |
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Sypa
Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921 |
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Ok checked the fuse ,it's burnt. Possible that the fuse did its job but whatsup with that bulged capacitor. Dont have a replacement atm, but i said that 4 the multimeter and it somehow shown up randomly
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djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Is it just the PSU board that got soaked? If so, that should be an easy fix... for someone that knows about SMPSU's!
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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bitSmasher
Old Croc Joined: 23 June 2012 Location: Melbourne Status: Offline Points: 2295 |
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Could even go audiophile odd and get a linear PSU for the DCX to replace that one
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https://www.instagram.com/batteryacidsoundsystem/
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Sypa
Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921 |
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The psu itself wasnt wetw just the part where you plugin the power cable ,almost seems like it was on purpose or someone really stupid somehow went to put the cup on the rack in the foh, why???
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Sypa
Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921 |
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Ok, maybe my first contact with electronics. That which blew up is a varistor ,more accurately a tvr10471.
I cant find that locally so i bought a http://spiratronics.com/275v-75j-metal-oxide-varistor-14n431k.html . I am completely daft for what these specs mean and which specs to look at, both are metal oxide and same size tho lol . Will i be ok using the one i got ? In the end i dont know still if thats the only thing which went wrong too... |
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 551 |
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You could have tested the unit without a varistor. The varistor provides overvoltage protection. It sits across live and neutral after the input supply fuse. When the input voltage is lower than a certain threshold, say 275V it has a resistance (Let's say infinity). If the voltage exceeds the threshold it then becomes low in resistance causing exccessive current to develop across the fuse in the unit which in turn blows. The mains voltage rarely reached these linits so you can test without it but replace once your sure the unit work. I would use the series lamp limiter https://www.vintage-radio.com/projects/lamp-limiter.html to test the unit. It is basically a case of putting a filament light bulb in series with the live connection going to the DCX. This is so that if there is further damage you will prevent excessive current going into the DCX and cause more damage. |
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studio45
Old Croc Joined: 16 October 2007 Location: United Kingdom Status: Offline Points: 3864 |
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The PSU in these units is very simple. There is just 1 power semiconductor doing all the switching, one transformer with one centre-tapped output, and then four linear regulators to get the required DC rails (+15, -15, +12 and +5v). So if it isn't working it should be easy to fix, or, you can just replace it with a couple of conventional transformer/rectifier/regulator supplies. There is quite a lot of room in the case.
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Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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Sypa
Young Croc Joined: 21 February 2013 Location: Croatia Status: Offline Points: 921 |
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Happy ending , the varistor and the fuse have been replaced and its working like new !
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