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sixt7gt350
Joined: 28 Nov 2003
Posts: 37
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 Posted: Fri Dec 12, 2008 11:50 pm Post subject: "University" OFA remotes: JP1? |
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Available in university towns and from Amazon.
They are just "purtied up" versions of a 4-device OFA remote.
Has anyone opened one up?
Which OFA remote are they based on?
Michigan version |
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The Robman
Site Owner
Joined: 01 Aug 2003
Posts: 21237
Location: Chicago, IL
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| Posted: Sat Dec 13, 2008 6:23 am Post subject: |
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This looks like a dressed up URC-4021, and if that's the case it has no JP1 possibilities. These are S3C8 remotes without an EEPROM chip.
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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! |
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unclemiltie
Expert
Joined: 21 Jan 2004
Posts: 1795
Location: Pittsburgh, PA
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| Posted: Sat Dec 13, 2008 12:27 pm Post subject: |
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how do they get by with a ROM-based remote with no E2? Where are the settings (especially the device setup codes?)
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this JP1 stuff is a sickness! |
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mr_d_p_gumby
Expert
Joined: 03 Aug 2003
Posts: 1370
Location: Newbury Park, CA
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| Posted: Sat Dec 13, 2008 12:39 pm Post subject: |
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| unclemiltie wrote: | | how do they get by with a ROM-based remote with no E2? Where are the settings (especially the device setup codes?) |
Everything is stored in RAM. There's a capacitor in the remote that will (some of the time) keep the RAM alive while changing batteries. You have to be careful not to press any buttons while the batteries are out.
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Mike England |
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The Robman
Site Owner
Joined: 01 Aug 2003
Posts: 21237
Location: Chicago, IL
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| Posted: Sat Dec 13, 2008 12:48 pm Post subject: |
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Remotes with EEPROMs copy the data from the EEPROM to the RAM before they use it. When you program setup codes, etc you are programming them in the RAM and this will then get copied to the EEPROM for safe keeping.
Remotes without EEPROMs, and remotes where the EEPROM is broken or missing, still use the RAM but they don't copy the data to the EEPROM.
Just FYI, even though remotes like the URC-6131, URC-6011, URC-8011, etc are programmed to use an EEPROM, they ship without one.
_________________
Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help! |
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