User Manual

11
Troubleshooting
If any specific problem should persist, however, please contact your Yamaha dealer.
Symptom Possible causes Possible solution
No sound. The cable is not connected properly.
• Connect the cable all the way in so that it
is firmly in place.
• Connect to “1+” and “1–” and turn the
plug to be locked.
Howling sound is produced
(feedback).
A microphone is directed toward the
speaker.
Aim the speaker away from the area where
the microphone picks up sound.
The sound is amplified too much.
Lower the volume of input device and locate
the microphone more closely to the sound
source.
The amplifier shuts down.
The total impedance of the speakers is less
than the minimum load impedance of the
amplifier.
Example:
More than two speakers (eight ohms) are
connected to a power amplifier, the load
impedance of which is six ohms.
Check the minimum load impedance of the
power amplifier, and lower the number of
speakers connected in parallel not to be
less than the impedance.
High frequency range is attenuated.
The protection circuit is operating in the HF
unit.
Refer to “Protective Circuit” in the NOTICE
(page 3).