TROUBLESHOOTING
SYMPTOM | PROBABLE CAUSE | SOLUTION |
No sound coming | • Amplifier not turned on | • Turn on amplifier. |
from speaker | • Amplifier gain is low | • Make sure that there is |
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| amplifier gain for that channel. |
| • Correct source not | • Select proper source. |
| selected or turned on |
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| • Defective patch cords to amplifier | • Check/replace patch cords. |
| • Speaker wires not | • Check speaker wire |
| connected to amplifier | connection to amplifier. |
| • Balance control set improperly | • Make sure Balance control is set |
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| at center, or 12 o’clock, position. |
| • Speaker wires damaged | • Make sure none of the speaker wires |
| or shorted | are frayed, cut or punctured. Make sure |
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| no wires are touching other wires or |
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| terminals and creating a short circuit. |
| • Speaker not configured | • In Dolby® Digital or DTS® mode, make |
| correctly | sure that the receiver/processor is |
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| configured so that the speaker in |
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| question is enabled. |
| • Center speaker is configured | • In Dolby Pro Logic® mode, make sure the |
| incorrectly | center speaker is not in phantom mode. |
| • Problem not diagnosed | • To diagnose the likely source of the |
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| problem, it is often helpful to switch the |
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| nonfunctioning speaker with one that |
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| is functioning correctly. Turn off all |
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| electronics before exchanging the |
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| speakers. Turn everything back on, and |
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| determine whether the problem is in |
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| the same place, or has moved with the |
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| speaker. If the problem is in the same |
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| place, the source is most likely with your |
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| receiver or amplifier. If the problem has |
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| followed the speaker, then contact your |
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| authorized JBL Synthesis custom installer |
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| or dealer for further assistance. If that |
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| is not possible, visit our Web site at |
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| www.jblsynthesis.com for further information. |
Bass is very weak | • Subwoofers are wired out |
| of phase |
•Make sure that positive terminals on the subwoofers go to the positive terminals on the amplifiers (red) and do the same for the negatives.
• Subwoofers have not | • Experiment with different locations. |
been placed optimally |
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