Sony STR-AV500 Operating Instructions - Page 26

Troubleshooting guide 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 cord. 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. REMEDY Use shielded type 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. There is any object between the unit Remove the object. and the commander head.