JP1 Remotes

pvollan · Joined: 16 Mar 2009 Posts: 5

Is everyone absolutely certain that the MX-500 is not JP1 compatible? Yes I know about "IRCLONE". It's just that, first of all, behind the battery compartmen I can plainly see three sets of jumpers (followed by one mysterious jumper by itself). Also, it is made my Universal Remote! Has anyone tried the jumpers? Because they sure look like some kind of JP! socket. Question

gfb107 · Expert Joined: 03 Aug 2003 Posts: 3411 Location: Cary, NC

The MX-500 is definitely not JP1 compatible. Universal Remote is not UEI.
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The Robman · Posted: Mon Mar 16, 2009 10:42 pm Post subject:

The jumpers that UEI (which stands for "Universal Electronics, Inc") uses as a JP1 connector are a very standard part. Next time you're replacing a hard drive, take a look at the pins that form it's connector because they're the exact same pins.

As Greg said, the MX-500 is made by a company called "Universal Remote Company" and they have nothing to do with UEI, so yes, we're 100% certain that it's not JP1 compatible.
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pvollan · Joined: 16 Mar 2009 Posts: 5

Thank you... that's why I posted in the beginners section. Still I can't help but wonder what those jumpers are good for.

The Robman · Posted: Tue Mar 17, 2009 5:06 pm Post subject:

It may well be that they can be used for a process similar to JP1, but it would take some enterprising soul to trace the lines back to see what they are connected to, and then take it from there.

Here's the thread where the secrets of the JP1 6-pin connector where first revealed:

http://www.remotecentral.com/cgi-bin/mboard/rc-remote/thread.cgi?1556
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Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!

MaskedMan · Posted: Wed Mar 18, 2009 10:08 am Post subject:

Those pins are used by URC to refresh the memory when sometimes it gets wiped clean. Bought a mx-600 off of ebay for $5, ram was empty, sent it in to URC, they refreshed the memory, sold it for $100. : )
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The Robman · Posted: Wed Mar 18, 2009 11:02 am Post subject:

Do you know that it's RAM vs. EEPROM or Flash memory? It's just that RAM typically only stays active while there's power being supplied to the MCU, whereas Flash and EEPROMs can keep their memory indefinitely.

There's definitely the potential for someone to reverse engineer it in a similar way to what we've done with JP1, but it's a lot of work.
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Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!

MaskedMan · Posted: Wed Mar 18, 2009 11:24 am Post subject:

It actually says RAM empty in the display window when any key is pressed, making it useless. The only thing to do is send it in for service.

I no longer have any mx-500 or 600 remotes. I do have RF20 RF universal remote with these same pins, some of the keys have stopped working, lost conductivity. You can have if you want to miss with it.
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Edmund