Onkyo TX-DS747 Owner Manual - Page 48

Troubleshooting guide If a problem occurs, adjust the controls on the TX-DS747 front panel to confirm that the remote controller is not malfunctioning or has worn out batteries. Trouble Cause Remedy Power, then immediately no power. • The amplifier protection circuitry has been • Contact your Onkyo Service Center. activated. No power. • Power cord is disconnected. • There is external noise in the computer cir- cults of the TX-DS747. • AC fuse blown. • Connect the power cord. • Turn the power off and then on again, or remove the AC plug from the outlet. • Contact your Onkyo Service Center. Power but no sound. • The T-2 MONITOR indicator is lit. • The MUTE indicator is lit. • The connections are bad or incorrect. • Press the TAPE-2 MONITOR button. • Press the MUTE button on the remote controller. • Check the input leads, speaker leads, pin plugs, etc. No sound or very minimal sound from the center speaker. • The speaker wires are disconnected. • Surround mode is set to HALL, LIVE, ARENA, STADIUM, or OFF. • The Center Speaker Setup is set to NONE. • Check the connection between the amplifier and the speaker. • When HALL, LIVE, ARENA, or STADIUM is selected for the Surround mode, only the effect sound will be notpot from the canter .pPPkPr. The sound level will be less compared to the sound level when the DOLBY DIGITAL/PRO LOGIC ACTION, DRAMA, MUSICAL is selected. • Set the Center Speaker Setup to SMALL or LARGE. Hum or low-frequency noise. • Poor or no input ground. • Poor or no phono motor ground. • The input and output cables are positioned incorrectly. • Check the outer conductor of input plugs. • Check for a proper ground connection. • Adjust the placement of the cable to reduce hum. Howling when the volume is turned up. • The turntable and speakers are too close to • Move them farther away from each other. each other. Rough or scratchy sound; high range • The pick-up stylus is worn. is not clear. • The stylus tip is dirty. • The treble level is too high. • Replace it. • Clean it. • Decrease the treble. AM stations cannot be received. • The AM loop antenna is not attached. • Connect the supplied AM loop antenna to the AM antenna terminals. Buzzing noise on AM (particularly at • There is noise from other electrical equip- • Move the AM loop antenna to a different posi- night or with weak stations). ment, such as fluorescent lamps. tion. • Connect an outdoor AM antenna. High-pitched noise or buzzing noise • There is noise from the TV. on AM. • Place the AM loop antenna as far as possible from the TV. • Move the unit away from the TV. Crackling noise on AM or FM. • The noise is caused by turning a fluorescent lamp on and off. • The noise is caused by an automobile ignition. • Move the antenna as far as possible from the fluorescent lamp. • Install an FM outdoor antenna as far as possible from the road. • Change the position or direction of the outdoor antenna. FM TUNED and STEREO indicators • The station signal is too strong. • Use a T-shaped antenna. light, but sound is distorted and stereo • Multiple reflection of the radio waves because • Use an antenna which has better directivity separation is bad. of tall buildings or mountains. and select a frequency with less distortion. FM TUNED and STEREO indicators • The station signal is too weak. • Install an outdoor FM antenna. flicker and a hiss is heard on FM. • The stereo FM broadcasts cover only about • Adjust the position or direction of the outdoor half the distance of an ordinary broadcast. antenna. Preset station is not recalled. • The power cord has been unplugged for an • The memory contents are lost. Store all sta- extended period of time. tions again. Multi-Room Remote System does not operate. • The connections are incorrect. • The MR OFF indicator is lit. • The remote controller is not aimed at the sensor. • The path between the remote controller and the sensor is blocked. • Check the connections. • Press the MR OFF button. (The MR OFF indi- cator should go off.) • Aim the remote controller at the TX-DS747 remote control sensor. • Remove the object blocking the path to the sensor. Front panel controls function but • There are no batteries in remote controller. remote controller does not. • The batteries are worn out. • Insert batteries. • Replace batteries. Also refer to the respective instruction manuals of the other components, e.g. video disc player, video cassette recorder, or TV/monitor. 48