Troubleshooting - Yamaha DSR112 Owner's Manual

Troubleshooting

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