DSR112/DSR115/DSR215/DSR118W Owner’s Manual
11
Troubleshooting
English
Troubleshooting
*If any specific problem should persist, however, please contact your Yamaha dealer.
Symptom
Possible causes
Possible solution
Power does not turn on.
The power cord is not connected
properly
Connect the power cord properly.
The power cord cannot
be disconnected.
You tried to disconnect the power
cord without pressing the latch
button.
The DSR series feature a V-LOCK power cord.
Press the latch button on the plug to disconnect
the power cord.
Power suddenly went
off.
The protection system has
operated, shutting down the power
supply.
Turn off the power, wait until the amplifier cools
down, and then turn on again.
No sound.
The cable is not connected
properly.
Connect to the INPUT jack properly.
Sound is interrupted
suddenly.
The protection system has
operated, muting the output.
Wait until the amplifier cools down. If the device
won’t automatically reset itself, turn off the power,
and then on again.
Sound howls
(feedback)
A microphone is directed toward the
speaker.
Keep the speaker away from the area where the
microphone picks up sound.
Sound is amplified too much.
Lower the volume of the input device and locate
the microphone more closely to the sound
source.
The setting of the HPF switch is not
appropriate.
Turn the HPF switch on (
O
) if you get feedback
in low frequency bands.
Each speaker sound
differs
(if multiple speakers
are used)
Settings for each speaker differ.
• Set the HPF and D-CONTOUR switches of
each speaker to the same positions.
• Set the POLARITY switch of each speaker to
the same position (DSR118W).
Sound is distorted
Input volume is excessive.
• Lower the volume level of the input device so
that the PEAK indicator sometimes lights.
• If sound continues to be distorted even if you
turn down the volume to the minimum, set the
MIC/LINE switch to the LINE (
N
) position (if the
switch is set to MIC).
Output volume is excessive.
Lower the output level with the LEVEL control so
that the LIMIT indicator sometimes lights.
The microphone
volume is too low.
The MIC/LINE switch is set to LINE.
Set the MIC/LINE switch to the MIC (
O
) position.
A microphone that needs phantom
power is being used.
DSR series products do not provide phantom
power.
Change your microphone to a dynamic
microphone, use a battery, or provide external
phantom power.
