Fender Passport P150 Owners Manual - Page 15

GROUNDING AND HUMS TROUBLESHOOTING 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. Likewise, 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 Passport into a grounded AC electrical outlet. 5. Be sure to use properly maintained cords and cables with the Passport. AIRFLOW FILTER CARE If the Passport is set up but does not function, please check the following items: • Is the Passport's power cord properly plugged into an electrical outlet? • Is there power at the outlet? • Is there sufficient airflow to the heatsink inside the power tower? • Is the air filter at the bottom of the tower dirty or clogged? • (If applicable) does your instrument have power? • Are the volume control knobs on the Passport turned above the minimum or counterclockwise positions? • Are the volume control knobs on your instruments turned above their minimum position? • Is the mic/instrument properly plugged into the Passport? • Is the mic/line switch at the mic line input in the proper position? • Is the mic/instrument turned on? • Are your audio cables frayed, cut or damaged? If after checking all of the above the Passport is still not performing correctly, consult your nearest authorized Fender Service Center. Your Passport uses a system of forced air cooling to keep the unit from overheating and falling into protect mode. The air filter at the base of the power tower prevents dirt and other materials from being pulled into the unit and possibly damaging it. It is important to periodically remove this filter and clean it by briskly shaking it and/or washing it with a light soapy solution. Avoid spilling any liquids on the operating surface, heat sink, grille, volume and tone controls, switches and line cord. ALWAYS unplug the Passport before cleaning it or approaching it with fluids. Before plugging in the Passport wait until the unit has completely dried. COVERING CARE Your Passport is housed in a rugged plastic body for long life and lasting good looks. To clean the Passport, use a sponge with a light soapy solution. As always, avoid spilling any liquids on the operating surface, heat sink, grille, volume and tone controls, switches and line cord. ALWAYS unplug the Passport before cleaning it or approaching it with fluids. Before plugging in the Passport wait until the unit has completely dried. 15