12VDC - Have I blown my KIT?!
HELP ! :)
I have a piece of audio equipment (M-Audio 410 firewire audio interface) that requires 12V DC (1000mA) I bought it in the states with a US adapter and step down convertor (240-110). Everything was working fine until I thought I should go out and buy a UK voltage adapter to replace the cumbersome setup of AC adapter - step down transformer - US/UK plug. I bought a '1000mA Variable Voltage AC/AC Adapter' with a 12V setting. After plugging it in, the lights came on and then went out on the device, andthen nothing! Is it because I bought an AC/AC adapter and not AC/DC adapter?? Could this cause the kit to stop working?? Its gonna be such a pain to try and return this to the store I bought it from in the US (Im in London), any help would be seriously appreciated. Regards, Nick. |
12VDC - Have I blown my KIT?!
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12VDC - Have I blown my KIT?!
I did'nt mean return it for a replacement. I was thinking perhaps it
was repairable? Does anyone know? based on the above, do you think I have blown it up?!! |
12VDC - Have I blown my KIT?!
wrote in message ups.com... I did'nt mean return it for a replacement. I was thinking perhaps it was repairable? Does anyone know? based on the above, do you think I have blown it up?!! If the power supply that you've bought is genuinely AC output, then the piece of kit is not going to have liked it much, for sure. There are two simple possibilities. First is that there is an internal fuse of some description. May be a wire ended or surface mount type, or may be a fusible resistor. Second possibility is that there is a polarity protection diode across the power input. If you put AC directly across a diode, it will fail short-circuit in fairly short order. However, in either case, it's not to say that the circuitry beyond didn't suffer damage before the diode failed, or fuse blew. I would take a look inside first, provided that you're reasonably sure what you're looking for, and have a meter to check said components if you find them. Arfa |
12VDC - Have I blown my KIT?!
Dear oh dear oh dear. Just received this e-mail from this **** who blew
his kit up by shoving ac up a dc socket. What on earth are these ****s doing anywhere near electrical equipment? He's now trying to defraud the suppliers and blame them for his incompetence! ------------------------------------------------------------------------------------------------------------------------- Hey , If you've nothing better to add than this ****, please refrain from posting to these boards. Nick. Just Another Theremin Fan wrote: wrote: Its gonna be such a pain to try and return this to the store I bought it from in the US (Im in London) Why should the store take it back? It's your mistake and you have blown it up! |
12VDC - Have I blown my KIT?!
wrote: People post to these boards to get advice from people who have more knowledge than themselves For Krisake... Kids are taught the difference between AC and DC in primary school here in the UK!!!!! Why not go whole hog and plug it into the water supply?!!!! And tell that pratt Bush to get the hell out of Iraq as well!!! |
12VDC - Have I blown my KIT?!
The power supply you connected, probably did not match to the required
specifications. You will have to send the unit back for service, unless you are proficient to do the service work on it. -- Jerry G. ====== wrote in message oups.com... HELP ! :) I have a piece of audio equipment (M-Audio 410 firewire audio interface) that requires 12V DC (1000mA) I bought it in the states with a US adapter and step down convertor (240-110). Everything was working fine until I thought I should go out and buy a UK voltage adapter to replace the cumbersome setup of AC adapter - step down transformer - US/UK plug. I bought a '1000mA Variable Voltage AC/AC Adapter' with a 12V setting. After plugging it in, the lights came on and then went out on the device, andthen nothing! Is it because I bought an AC/AC adapter and not AC/DC adapter?? Could this cause the kit to stop working?? Its gonna be such a pain to try and return this to the store I bought it from in the US (Im in London), any help would be seriously appreciated. Regards, Nick. |
12VDC - Have I blown my KIT?!
How are your Maplins shares doing?
I live in Canada, and have shares in the Hudson's Bay Company. This one started out by selling beaver skins. I think they still do! -- Jerry G. ====== "Just Another Theremin Fan" wrote in message oups.com... wrote: The question was, is there any hope in repairing this or do I just buy another????? Buy another and do it again, I have shares in Maplins stock..... |
12VDC - Have I blown my KIT?!
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12VDC - Have I blown my KIT?!
|
12VDC - Have I blown my KIT?!
The power supply you connected, probably did not match to the required
specifications. That is tech' speak for "The **** stuck AC up a DC socket"!!!!! LOL |
12VDC - Have I blown my KIT?!
"Jerry G." wrote:
How are your Maplins shares doing? I live in Canada, and have shares in the Hudson's Bay Company. This one started out by selling beaver skins. I think they still do! Do you have a lot of use for beaver skins around the shop? -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
12VDC - Have I blown my KIT?!
wrote in message oups.com... HELP ! :) I have a piece of audio equipment (M-Audio 410 firewire audio interface) that requires 12V DC (1000mA) I bought it in the states with a US adapter and step down convertor (240-110). Everything was working fine until I thought I should go out and buy a UK voltage adapter to replace the cumbersome setup of AC adapter - step down transformer - US/UK plug. I bought a '1000mA Variable Voltage AC/AC Adapter' with a 12V setting. After plugging it in, the lights came on and then went out on the device, andthen nothing! Is it because I bought an AC/AC adapter and not AC/DC adapter?? Could this cause the kit to stop working?? Its gonna be such a pain to try and return this to the store I bought it from in the US (Im in London), any help would be seriously appreciated. Regards, Nick. The device *should* have reverse polarity protection, which could be either (1) a reverse-biased diode across the input, or (2) a diode in series with the + rail after the power jack. What will happen if you connect an AC adaptor? Well, in the first instance the diode will short out the negative component of the AC supply, and allow the positive component to pass. The shorted negative component will quickly either damage the power supply or blow a fuse in the appliance itself, provided the manufacturer has been thoughtful enough to add one to the design. At that price, they damn well should. Hopefully all this will happen before any other damage can be done. In the second instance, the series diode will rectify the AC to rough, half wave DC. This could explode electrolytic caps and cause the internal regulator to malfuction, with possibly catastrophic results. The fuse may well not fail until it is too late, if at all as there may be no overcurrent situation until a semiconductor fries. The only way to know for sure what the damage is, is for a tech to look inside. You may get very lucky and it could just be an internal (probably miniature surface mount) fuse. OTOH, it could be a write off, there's no way to tell from the outside. If specialist SMD ICs are blown, forget about a local tech repairing it, it will be a manufacturer/dealer repair only, and they might consider it uneconomical to service. Dave |
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