GROUNDING AND HUMS |
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Ground loops are one of the most common causes of hum and buzz in sound reinforcement systems and other
audio products. A ground loop usually occurs if the separate pieces of equipment are plugged into different AC
circuits. Also, if the audio wiring is placed too close to the power cords, hums or buzzes can bleed into the system. Still, improperly maintained power and audio cables are yet another cause of bothersome noise. In order to help minimize stray hums and buzzes, here are some helpful hints.
1.Keep all electronics connected to the sound system on the same electrical circuit.
2.Keep audio signal cables away from the AC power cords.
3.Use balanced cables when applicable.
4.Always plug the LTB into a grounded AC electrical outlet.
5.Be sure to use properly maintained cords and cables with the LTB.
VINYL COVERING CARE
The LTB mixer and speaker cabinets are covered in vinyl for long life and lasting good looks. To clean the cabinets, use a sponge dampened with a light soapy solution. Avoid spilling any
liquids on the operating surface, grilles, volume and tone controls, switches and line cord inputs. ALWAYS unplug the LTB before cleaning it or approaching it with fluids. Before plugging in the LTB wait until the unit has completely dried.
If the LTB is set up but does not function, please check the following items:
•Is the LTB 's power cord properly plugged into an electrical outlet?
•Is there power at the outlet?
•Are the volume control knobs on the LTB turned above the MIN position?
•Are the volume control knobs on your instruments turned above their minimum position?
•Is the mic/instrument properly plugged into the LTB ?
•Is the mic/instrument turned on?
•Are your audio cables frayed, cut or damaged?
•If using an outboard gear, are the cords properly connected?
•Are the speaker cables properly connected?
•Is there power to the outboard gear?
•Are the levels on your outboard gear above their minimum positions?
•(If applicable) does your instrument have power?
If after checking all of the above the LTB is still not performing correctly, consult your nearest authorized Fender Service Center.
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