TROUBLESHOOTING
If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help.
SYMPTOM | CAUSE | REMEDY |
|
The unit fails to turn on when the | Power cord is not plugged in or is not | Firmly plug in the power cord. |
|
POWER switch is pressed. | completely inserted. |
|
|
|
|
|
|
No sound. | The SPEAKERS switches are released | Press them inward to the “ON” position. |
|
| outward to the “OFF” position. |
|
|
|
|
|
|
| The speaker level controls are set to the | Turn them clockwise. |
|
| fully counterclockwise position. |
|
|
|
|
|
|
| Connection cords are not connected | Connect them securely. |
|
| securely to the INPUT terminals. |
|
|
|
|
|
|
| Speaker systems are not properly | Connect them correctly. |
|
| connected to this unit. |
|
|
|
|
|
|
The sound suddenly goes off. | The protection circuit has activated | Turning the unit off and then on will |
|
| because of short circuit etc. | reset the protection circuit. |
|
|
|
|
|
No sound is heard from the left | Speaker systems are not properly | Connect them correctly. |
|
and/or right speaker systems. | connected to this unit. |
|
|
|
|
|
|
| The input level controls are set to the | Turn the input level controls clockwise. |
|
| fully counterclockwise position. |
|
|
|
|
|
|
The acoustic “image” is unstable, | The positive (+) and negative | Reconnect the speaker systems to this |
|
characterized by unnatural sound | polarities (of this unit and the speaker | unit so that the polarities are aligned. |
|
and insufficient | systems) are not matched. |
|
|
quality. |
|
|
|
|
|
|
|
Hum noise is heard from the | Connection cords are not connected | Connect them securely. |
|
speakers. | securely to the INPUT terminals. |
|
|
|
|
|
|
7