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9. AppendixB
SystemRestore
TheJSD100hasseveralmethodsofrecoveringfromanunlikelyfailure.Thesearedetailedbelow.
BypassMode
WhentheJSD100mainpowerswitchisoffandthebypasspowersupplyispluggedin,independentbypass
circuitrycreatesamonosumoftheselectedanalogordigital
inputaudioandroutesittotheleftandright
outputs.AquickwayofrecoveringfromasystemfailureistoturntheJSD100off.
RestoreFactoryFirmware
Ifafirmwareupdateofthemain(PIC)processerisinterrupted,itispossibletoleavethesysteminoperable.To
restorethefactoryinstalledfirmware,turnofftheJSD100,thenholddownbuttons4and6(Digital16
ChannelandUser2)whileturningthepowerbackon.ThefrontpanelLEDswillstartflashing.Releasethe
buttonswhentheLEDsstartflashing.WhentheLEDsstopflashing,thesystemwillrestartwiththeoriginal
firmware.Theinterruptedfirmwareupdatecanthenberepeated.
LoadConfigurationfromSDCard
TheSDcardisusedasa"personalitymodule"intheJSD100.ShouldaJSD100bereplaced,allthesaved
settingsfromtheoldunitcanbeeasily
loadedintothenewunitwithouttheuseofacomputer.These
settingsweresavedduringtheinitialconfigurationusingtheBackupbuttonontheGUI.Torestorethe
settingstoanewJSD100,insertthecardfromtheoldunit(behindtheremovablecoverontherearpanel)
in
thenewunit.WiththeJSD100off,holddownbuttons9and10(AUXandMIC)downwhileturningonthe
power.Continuetoholdthebuttonsabout30secondsuntilthedisplaysays"LoadingfromSDcard."The
configurationwillbeloadedandcopiedtotheinternalnonvolatilememory.TheJSD100isnowconfigured
thesameasthepreviousunit.Anyerrors(missingcard,missingfile,etc.)arereportedonthedisplay.
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