JBL SRX812p User Manual

Also see for SRX812P: User guide Quick start guide

34Symptom Likely Cause What to doNo soundSpeaker not connectedto active AC power Verify that speaker is connected and that the circuit is onPower not switched on Switch on power and verify that power LED is onNo sound, speaker is connectedto working AC power but won’tcome on.Speaker power cable is faultyor improperly connected.5HVHDWWKHSRZHUFDEOHDWERWKHQGV6XEVWLWXWHDNQRZQJRRGSRZHUFDEOHNo sound. Speaker comes on.Signal source(mixer, instrument, etc.)is not sending.&KHFN98PHWHUVRQWKHVRXUFHPL[HU9HULI\WKDWWKHWDSHRU&'LVSOD\LQJ8VHKHDGSKRQHVWRYHULI\WKDWWKHLQVWUXPHQWLVDFWXDOO\sending an audio signalFaulty cables andconnections'LVFRQQHFWDQGUHVHDWVLJQDOFDEOHV5HSODFHVXVSHFWHGFDEOHZLWKDNQRZQJRRGFDEOHNo sound with microphoneconnected directly to the input.Microphone requiresphantom power7KH65;GRHVQRWVXSSO\SKDQWRPSRZHU6ZLWFKWRDG\QDPLFmicrophone, use a battery powered microphone (if possible),use an external phantom power supply for condenser type microphones.Signal sounds distorted andvery loud, PEAK light is litmost of the time.Excessive input signal, tryingto exceed the capabilities ofthe speakers5HGXFHWKHRXWSXWOHYHORIWKHVRXUFH7XUQGRZQWKHOHYHOFRQWUROVRQWKHVSHDNHU8VHDGGLWLRQDO65;VSHDNHUVSignal sounds distorted even atmoderate volumes, LIMIT lightis not lit.Mixer or other sourceis overdriven5HYLHZWKH2ZQHU¶V0DQXDOIRU\RXUPL[HUDQGDGMXVWFRQWUROVDVQHHGHG,QSXWVHQVLWLYLW\ JDLQ &KDQQHOIDGHUV0DVWHUIDGHUV2QFHWKLVLVGRQHUHYLHZWKHLQVWUXFWLRQVLQWKH4XLFNStart section of this guide.Lots of hiss in the sound,the mixer controls are atvery low settings.Improper gain structure0DNHVXUHWKDWWKH0,&/,1(VZLWFKLVLQWKH/,1( GLVHQJDJHG SRVLWLRQ5HGXFHWKHOHYHOVHWWLQJVDWVSHDNHU5HYLHZWKH2ZQHU¶V0DQXDOIRU\RXUPL[HUDQGDGMXVWFRQWUROVDVQHHGHG,QSXWVHQVLWLYLW\ JDLQ&KDQQHOIDGHUV0DVWHUIDGHUVNoise or hiss heard at output. Noisy source deviceDisconnect the devices that are connected to your speaker one at a time.If the noise goes away, the problem is with the source or theconnecting cable.Hum or Buzz that increases ordecreases when the mixer levelcontrols are moved.,PSURSHU$&JURXQGRUfaulty equipment connectedto mixer input'LVFRQQHFWRUPXWHFKDQQHOVRQHDWDWLPHWRLVRODWHWKHSUREOHP5HIHUWRthe owner’s manual of the faulty equipment for troubleshooting help.Faulty cable between sourceequipment and mixer 6XEVWLWXWHDNQRZQJRRGFDEOHIRUWKHVXVSHFWHGIDXOW\FDEOHHum or Buzz,PSURSHU$&JURXQGLQJground loopsμ/LIW¶WKHDXGLRJURXQGE\XVLQJDQ;/5)WR;/50DGDSWHURQRQHHQG5HURXWHDXGLRFDEOHVDZD\IURP$&SRZHUDQGOLJKWLQJFDEOHVExcessively longunbalanced cable run8VHWKHEDODQFHGRXWSXWV LIDYDLODEOH RI\RXUPL[HURUVRXUFHHTXLSPHQWWRGULYH\RXU65;VSHDNHUV8VHD³',´ GLUHFWLQMHFWLRQ ER[WRFRQYHUW\RXUXQEDODQFHGHTXLSPHQWoutput to a balanced output.Improper system gainstructure5HGXFHWKH,1387OHYHOFRQWUROVDQGLQFUHDVHWKHRXWSXWOHYHORI\RXUsource devices.TROUBLESHOOTING