JBL PRX600 series User Manual

Contents

TROUBLESHOOTINGSymptom Likely Cause What To DoNo sound Speaker not connected toactive AC powerVerify that speaker is connected and thatcircuit is on. Switch on power and verifythat illuminated logo is on.• Re-seat the power cable at both ends.• Substitute a known-good power cable.Speaker power cable is faultyor improperly connectedNo sound, speaker is connectedto working AC power but won’tcome onBlown fuse. • Replace the fuse with the specified valueand type.• Take your speaker to a competentservice center.Signal source (mixer,instrument, etc.) is not activeNo sound, speaker turns on Faulty cables and connections • Check VU meters on the source mixer.• Verify that the CD/MP3 is playing.• Use headphones to verify that theinstrument is actually sending an audio signal.Faulty cables and connections • Disconnect and re-seat signal cables.• Replace suspected cable with aknown-good cable.No sound with microphoneconnected directly to theMIC inputMicrophone requires 48Vphantom powerThe PRX600 speakers do not supplyphantom power. Switch to a dynamicmicrophone, use a battery in the microphone(if possible), use an external phantom powersupply. Check cable.Faulty microphone cableSignal sounds distorted and veryloud, OVERLOAD light is lit most ofthe timeExcessive input signal, tryingto exceed the capabilities ofthe speakers• Reduce the output level of the source.• Turn down the level controls on the speaker.Signal sounds distorted even atmoderate volumes, OVERLOADlight is not litMixer or other sourceis overdriven (clipping)Review the Owner’s Manual for your systemsetup and adjust controls as needed.• Input sensitivity (gain)• Check gain structure of signal chain31