QSC Audio - ISA 500T
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TM Service Bulletin A U Title Bulletin Models Affected Bulletin Bevision ISA Turn on Hangup ISA0001 Issue Date April 4 2002 ISA 750 800T 450 amp 500T A Production Bange 01 2000 04 2002 serial 0100xxxxx 0402xxxxx Description The circuitry that controls protective current cutback in ISA amplifiers may in some instances cause a channel usually channel 1 to hang up at turn on This problem is most pronounced in the ISA 750 and ISA 800T models but may also occur in some ISA 450 and ISA 500T amplifiers Symptoms When the amplifier is turned on one or both channels remain inoperative with their respective clip LEDs lit In some cases the problem will clear by itself after several seconds This problem is merely a nuisance and ...Click here to download the manual
Contents
TM Service Bulletin A U Title Bulletin Models Affected Bulletin Bevision ISA Turn on Hangup ISA0001 Issue Date April 4 2002 ISA 750 800T 450 amp 500T A Production Bange 01 2000 04 2002 serial 0100xxxxx 0402xxxxx Description The circuitry that controls protective current cutback in ISA amplifiers may in some instances cause a channel usually channel 1 to hang up at turn on This problem is most pronounced in the ISA 750 and ISA 800T models but may also occur in some ISA 450 and ISA 500T amplifiers Symptoms When the amplifier is turned on one or both channels remain inoperative with their respective clip LEDs lit In some cases the problem will clear by itself after several seconds This problem is merely a nuisance and ...