JBL SP8II Speaker
Contents
1. JBL SP8II SoundPoint 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 each driv2. er 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 or some co
3. mbination 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 clin ol EXPLODED VIEW a penia ees K CROSSOVER NETWORK E H j go 590 0283 CoS rweerer 1 Lf jG Gu GRILLE CLOTH HIGH FREQUENCY TRANSDUCER 590 0284 BLACK WIRE CONNECTS TO TERMINAL creen WIRE CONNECTS TO TERMINAL BACK VIEW FRONT VIEW PART NO DESCRIPTION 590 0194 BAFFLE SP8ll 590 0267 GRILLE ASSEMBLY 590 0349 8 WOOFER 590 0283 CROSSOVER NETWORK 590 0284 1 TWEETER GRILLE CLOTH NOT SOLD ALONE SEE 590 0267 590 0173 DOG EAR W SCREW 180 0030 J BL LOGO 220 0859 OUTER CARTON 220 0438 TEMPLATE 170 0091 OWNER S MANUAL N A WARRANTY CARD SP8I ROUGH IN FRAME PART NO RIF8 amp
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