JBL L Series User's Manual
Contents
1. or some combination of the above If only one loudspeaker is exhibiting the problem and you re confident that it s not caused by too little power too much power excessive equalization see solutions for Problems 1 and 2 WIRING DIAGRAM EXPLODED VIEW CROSSOVER TWEETER 013 7600 05278 EP 18DA25BF DT01 EP ITEM PART NO DESCRIPTION QTY ITEM PART NO DESCRIPTION QTY 1 329 060 05274 OWAE GRILLE ASS Y 1 10 051 C05278A E SWITCH BOUNDARY 1 2 352 CM04050D949 E SCREW DOG EAR 4 COMPENSATION 3 18DA25BF DT01 EP TWEETER ASS Y 1 11 352 EM02508C961 E SCREW FOR SWITCHES 4 4 248 000 05008 OWAE BAFFLE ASSEMBLY 1 12 221 060 05165 0TAE PAINT TEMPLATE 1 BAFFLE DOG EARS CAPS 13 402 000 05697 E OUTER CARTON 1 5 16PR80BYG DW02 EP 6 1 2 WOOFER 1 14 404 000 05093 E CUTTING TEMPLATE 1 6 013 7600 05278 EP CROSSOVER NETWORK 1 15 405 000 05008 E WARRANTY CARD T 7 352 CM04012D948 E SCREW FOR TWEETER BRIDGE 11 16 406 000 05527 E OWNER S MANUAL T NETWORK AND WOOFER 17 431 000 05950 E FOAM PACKING TOP 1 8 316 P C 05201 OTAE LOGO GRILLE 1 18 431 000 05957 E FOAM PACKING BOTTOM 1 9 051 C05275A E SWITCH TWEETER LEVEL 1 SWITCH ASSEMBLY LS326C ROUGH IN FRAME PART NO RIF6CS2. JBL LS326C Studio L Series JBL Loudspeaker Troubleshooting Repair Tips Most customers prefer to do simple loudspeaker repairs themselves By following the steps below a majority of loudspeakers can be returned to their original factory performance with minimum effort Choose the example that best describes the problem you are experiencing Problem 1 No sound or distorted sound from one loudspeaker in a pair or set Connect the dead distorting loudspeaker to a different amplifier channel one that had a functioning loudspeaker connected to it If it functions normally the problem is not loudspeaker related If the loudspeaker still makes no sound or sounds distorted a wire may have become loose or disconnected the network also known as a crossover may be defective the drivers woofer tweeter etc may be defective or in very rare cases all may be defective Refer to the wiring diagram and exploded view below The network is a small circuit board found on the inside of the terminal cup or mounted to an inside wall of the enclosure It sends low frequency sounds to the woofer high frequency sounds to the tweeter and if applicable mid frequency sounds to the midrange driver Make sure all wires are secure and connected Look for components on the network that look burnt bulged or abnormal If everything looks normal connect the network to the drivers from another matching loudspeaker MAKE SURE you attach the correct wires to ea
3. ch driver mid and low frequency sounds can damage the tweeter If there is still no sound or distorted sound the network is defective If there is clean undistorted sound the drivers are defective Problem 2 No sound or distorted sound from one or more but not all drivers in an enclosure Remove the problem driver s from the enclosure and make sure all wires are secure and connected If they are proceed with the following test Woofer or midrange driver Connect the driver s and input terminals directly to the loudspeaker wires from your receiver amplifier and play some music at a reasonable volume If the driver now sounds normal produces a clean undistorted sound the network is most likely defective Tweeter Replace the tweeter with a functioning tweeter from another loudspeaker If the tweeter now functions normally produces clean undistorted sound the original tweeter is defective If the replacement tweeter also sounds distorted or produces no sound the network is most likely defective Problem 3 Loudspeakers distort rattle or pop at higher volumes This is usually NOT a loudspeaker problem Common causes are too much power playing the loudspeakers too loud and causing them to distort an amplifier with not enough power the amplifier can t produce the required volume without distorting excessive equalization turning the tone controls too far clockwise and or engaging the loudness bass boost button on your receiver
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