B-52 US-3000 - Front Panel LEDs and Switches

B-52 US Series Professional Power Amplifiers - Instruction Manual
THE BEAUTY OF POWER
US SERIES AMPLIFIERS
Reduce the output volume using the specific channel’s
level controls until the clipping disappears or until the
CLIPLEDsashonlyoccasionally.
7. PROTECT INDICATORS
TheseyellowLEDsindicatethatthechannelisineither
PROTECTmodeorMUTEmode.Whenthechannel
goesintoprotectmodeitsoutputwillturnOFF.Thisis
to protect the speakers connected to that channel.
NOTE:TheprotectLEDwilllightwhenthe
 heatsinkisoverheating.Oncetheaffected
channel’s heatsink cools down, the output signal
 willautomaticallyresumeandthePROTECTLED
 willturnOFF.Constanttriggeringofthethermal
protection indicates blocked vents, dusty air
filters, possible low load condition, or problems
with your speakers or cables.
NOTE: ThePROTECTLEDswillilluminatefor
about two to three seconds when the amplifier is
 poweredONandtheywillfadeslowlywhenthe
 amplierispoweredOFF.Thisindicatesyour
amplifier is going through a transition process
and the outputs are muted.
WARNING:IfthePROTECTLEDsilluminate
 constantlyanddon’tturnOFF,evenwhen
the speakers are physically disconnected from
the amplifier’s outputs, this indicates a fault.
 ImmediatelyturntheamplierOFF,disconnect
 thepowercordfromtheACoutlet,andreferthe
 ampliertoservicepersonnel.AuthorizedB-52
service centers are listed at www.B-52Pro.com
8. BRIDGE LED
ThisgreenLEDilluminateswhentheMODEswitchon
therearpanelissetintheBRIDGEposition.Usethe
Channel1LEVELcontroltoadjusttheoutputvolume
inBRIDGEMONOmode;theChannel2LEVELcon-
trol is inactive in this mode.
9. POWER LED
TheblueLEDwillilluminatewhenyouramplieris
turnedON.
10. PARALLEL LED
ThisgreenLEDillumiateswhentheMODEswitchon
therearpanelissettoPARALLEL.UsetheChannel1
LEVELcontroltoadjusttheoutputvolumeofChannel
1andtheChannel2LEVELcontroltoadjusttheout-
put volume of Channel 2, even though both channels
amplify the same signal connected to the Channel 1
input.
11. AC POWER SWITCH
UsethisswitchtoturnyouramplierONorOFF.
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