Sony STR-AV880 Operating Instructions - Page 30

Amplifier PROBLEM Severe hum or noise is heard. The Remote Commander does not operate. CAUSE The connecting cords are not of shielded type. A transformer, motor, TV or fluorescent light affects the connecting cords. The audio components are too close to a TV set. The receiver is not grounded. The connections are loose. The plugs and jacks are dirty. The batteries are exhausted. The MAIN POWER switch on the receiver is not depressed. SOLUTION Use shielded connecting cords. Place the connecting cords in a location away from a transformer or motor, and at least 3 meters (10 feet) from a TV set or a fluorescent light. If both are used at the same time, separate the TV from the audio components. Connect the ground wire to the antenna ground terminal. Make secure connections. Wipe the plugs and jacks with a cloth lightly dampened with alcohol. Replace the batteries with new ones. Depress the MAIN POWER switch. 30