Sony STR-AV720 Operating Instructions - Page 25
Sony STR-AV720 Manual
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Sound Problem No sound is heard even if you adjust VOLUME. Sound is heard only at a very low volume. One channel does not transmit audio, or the volume from the left and right speakers is unbalanced. There is an abrupt loss of sound from one or both of the speakers, and the PROTECTOR indicator flickers in the display window. Sound transmitted from the speakers is reversed. There is lack of bass sound or the instrument position is obscure. Severe hum or noise is heard. Cause Solution The speaker or program source equipment is not connected correctly. Connect the equipment correctly. The SPEAKERS selector is not set correctly. Set the selector correctly. The TAPE 2 MONITOR button has been pressed for a program source other than tape deck 2. (The indicator is lit.) Press the button to disengage. A wrong FUNCTION selector has been Press the correct FUNCTION selector. pressed. The MUTING button has been pressed. Press the button to disengage. (The MUTING indicator is lit.) The BALANCE control is not set appropriately. Adjust the BALANCE control. The speaker or program source is not connected correctly. Check and properly connect the equipment. A short-circuit problem activates the protective circuit. Turn off the unit, eliminate the short, circuit problem and turn on the power again. If there is no short-circuit problem, consult your nearest Sony dealer. The speakers are not connected correctly. Connect the right speaker to the R SPEAKER terminals and the left speaker to the L SPEAKER terminals. The + / - connection of the speaker is Connect the speaker with the correct reversed. phase. The connecting cords are not shielded type. A transformer, motor, TV or fluorescent light affects the connecting cords. 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. The audio components are too close to a TV set. If both are used at the same time, separate the TV from the audio components. The unit is not grounded. Connect the ground wire to the antenna ground terminal. The connections are loose. Make secure connections. The plugs and jacks are dirty. Wipe the plugs and jacks with a cloth lightly dampened with alcohol. 25