JBL Prx615m Manual
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TROUBLESHOOTING SymptomLikely CauseWhat To Do No soundSpeaker not connected to active AC powerVerify that speaker is connected and that circuit is on. Switch on power and verify that illuminated logo is on. • Re-seat the power cable at both ends. • Substitute a known-good power cable. Speaker power cable is faulty or improperly connected No sound, speaker is connected to working AC power but won’t come onBlown fuse.• Replace the fuse with the specified value and type. • Take your speaker to a competent service center. Signal source (mixer, instrument, etc.) is not active No sound, speaker turns onFaulty cables and connections• Check VU meters on the source mixer. • Verify that the CD/MP3 is playing. • Use headphones to verify that the instrument is actually sending an audio signal. Faulty cables and connections• Disconnect and re-seat signal cables. • Replace suspected cable with a known-good cable. No sound with microphone connected directly to the MIC inputMicrophone requires 48V phantom powerThe PRX600 speakers do not supply phantom power. Switch to a dynamic microphone, use a battery in the microphone (if possible), use an external phantom power supply. Check cable. Faulty microphone cable Signal sounds distorted and very loud, OVERLOAD light is lit most of the timeExcessive input signal, trying to exceed the capabilities of the speakers• Reduce the output level of the source. • Turn down the level controls on the speaker. Signal sounds distorted even at moderate volumes, OVERLOAD light is not litMixer or other source is overdriven (clipping)Review the Owner’s Manual for your system setup and adjust controls as needed. • Input sensitivity (gain) • Check gain structure of signal chain 31 PRX600.UsersGuide.020411.qxd 2/4/11 11:13 AM Page 31
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 the connecting cable. Improper A/C ground or faulty equipment connected to mixer inputDisconnect or mute channels one at a time to isolate the problem. Refer to the owner’s manual of the faulty equipment for troubleshooting help. Faulty cable between source equipment and mixerSubstitute a known-good cable for the suspected faulty cable. Improper A/C grounding, ground loops• “Telescope” the audio ground by using an XLR/F to XLR/M adapter on one end. • Re-route audio cable away from AC power and lighting cables. Excessively long unbalanced cable run• Use the balanced outputs (if available) of your mixer to drive your PRX speakers. • Use a “DI” (direct injection) box to convert your unbalanced equipment output to a balanced output. Improper system gain structureReview the Owner’s Manual for your system setup and adjust controls as needed. • Input sensitivity (gain) Microphones are pointed into the speakersMove the speakers so they do not point to the microphone’s pickup pattern. Equalizer settings are incorrectLocate the feedback frequency and reduce it using the mixer EQ or an external equalizer. Excessive gainReduce the gain at the mixer and move the microphone closer to the sound source. Recorded music with excessive low frequenciesSwitch the EQ switch to “flat.” Noise or hiss heard at output Hum or Buzz that increases or decreases when the mixer level controls are moved Hum or Buzz Speakers feed back and howl when the microphone volume is turned up Too much low frequencies when playing back prerecorded music 32 PRX600.UsersGuide.020411.qxd 2/4/11 11:13 AM Page 32
CONTACT INFORMATION Mailing Address: JBL Professional 8500 Balboa Blvd. Northridge, CA 91329 Shipping Address: JBL Professional 8500 Balboa Blvd., Dock #15 Northridge, CA 91329 (Do not return product to this address without first obtaining prior authorization from JBL) Customer Service: Monday through Friday 8:00am - 5:00pm Pacific Coast Time In the U.S.A. (800)8JBLPRO (800.852.5776) www.jblproservice.com On The World Wide Web: www.jblpro.com Professional Contacts, Outside The USA: Contact the JBL Professional Distributor in your area. A complete list of JBL Professional international distributors is provided at our U.S.A. website www.jblpro.com Product Registration: Register your product online at www.jblpro.com/registration33 PRX600.UsersGuide.020411.qxd 2/4/11 11:13 AM Page 33
WARRANTY INFORMATION The JBL Limited Warranty on professional loudspeaker products (except for enclosures) r\ emains in effect for five years from the date of the first consumer purchase. JBL amplifiers are warranted for three years from the date of original purchase. Enclosures and all other JBL products are warranted for two years from the date of original purchase. Who Is Protected By This Warranty? Your JBL Warranty protects the original owner and all subsequent owners so long as\ : A.)Your JBL product has been purchased in the Continental United States, Hawaii or Alaska.(This Warranty does not apply to JBL products purchased elsewhere except for purchases by military outlets. O\ ther purchasers should contact the local JBL distributor for warranty information.); and B.)The original dated bill\ of sale is presented whenever warranty service is required. What Does The JBL Warranty Cover? Except as specified below, your JBL Warranty covers all defects in material and workmanship. The following are not covered: Damage caused by accident, misuse, abuse, product modificat\ ion or neglect; damage occurring during shipment; damage resulting from failure to follow instructions co\ ntained in your Instruction Manual; damage resulting from the performance of repairs by someone not authoriz\ ed by JBL; claims based upon any misrepresentations by the seller; any JBL product on which the serial number has been defaced, modified or removed. Who Pays For What? JBL will pay all labor and material expenses for all repairs covered by this\ warranty. Please be sure to save the originalshipping cartons because a charge will be made if replacement cartons ar\ e requested. Payment of shipping charges is discussed in the next section of this warranty. How To Obtain Warranty Performance If your JBL product ever needs service, write or telephone us at JBL Incorporated (Attn: Customer Service Department), 8500 Balboa Boulevard, PO. Box 2200, Northridge, California 91329 (818/\ 893-8411). We may direct you to an authorized JBL Service Agency or ask you to send your unit to the factory for repair. Either way, you'll need to present the original bill of sale to establish the date o\ f purchase. Please do not ship your JBL product to the factory without prior authorization. If transportation of\ your JBL product presents any unusual difficulties, please advise us and we may make special arrangements with yo\ u. Otherwise, you are responsible for transporting your product for repair or arranging for its transporta\ tion and for payment of any initial shipping charges. However, we will pay the return shipping charges if repairs are covered by the \ warranty. Limitation Of Implied Warranties ALL IMPLIED WARRANTIES,INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY. EXCLUSION OF CERTAIN DAMAGES JBL'S LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT, AT OUR OPTION, OF ANY DEFECTIVE PRODUCT AND SHALL NOT INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS AND/OR DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH VARY, FROM STATE TO STATE. 34 PRX600.UsersGuide.020411.qxd 2/4/11 11:13 AM Page 34
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Part Number: 444833-001 2/11 8500 Balboa Boulevard Northridge, CA 91329 USA www.jblpro.com PRX600.UsersGuide.020411.qxd 2/4/11 11:13 AM Page 36