Yamaha DHR 12M Manuale d'uso - Pagina 14
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Troubleshooting
Suspension angle
The strength of an eye bolt differs depending on the suspension angle. Make sure to use eye bolts within a range of 0 to 45
degrees from a right angle (as shown).
Correct: Within 45° from a right angle
Incorrect: Do not suspend the eye bolts as shown in the illustrations below.
Prohibited
Prohibited
Troubleshooting
Symptom
Power does not turn on.
Power suddenly went off.
No Sound.
Sound is interrupted suddenly.
Sound howls (feedback).
Each speaker sound differs
(if multiple speakers are used).
The [LIMIT]
indicator is off.
Sound is
distorted.
The [LIMIT]
indicator is on.
The microphone volume is too
low.
Low and high frequency are
unbalanced.
If any specific problem should persist, however, please contact your Yamaha dealer.
14
0°
45°
Possible causes
The power cord is not connected properly. Connect the power cord all the way in so that it is firmly in place.
The protection system has been acti-
vated, shutting down the power supply.
The cable is not connected properly.
The protection circuit has been activated,
muting the output.
A microphone is directed toward the
speaker.
Sound is amplified too much.
Settings for each speaker differ.
Input volume is excessive.
Output volume is excessive.
The [MIC/LINE] switch is set to [LINE].
The output limiter is active.
Max. 45°
Prohibited
Only one
suspension point
More than
Possible solution
Turn off the power, wait until the amplifier cools down, and then
turn on again.
Connect the cable all the way in so that it is firmly in place.
Wait until the amplifier cools down. If the unit won't automatically
reset itself, turn off the power, and then on again.
Aim the speaker away from the area where the microphone
picks up sound.
Lower the volume of input device and locate the microphone
more closely to the sound source.
Set the [HPF] switch and [D-CONTOUR] switch of each speaker
to the same positions.
When the [MIC/LINE] switch is set to [MIC], and even if you
lower the volume fully the sound is still distorted, set the switch
to the [LINE] position. If the sound is still distorted even if the
switch has been set to [LINE], lower the volume of the con-
nected input devices.
Turn the [LEVEL] knob to lower the output level to a point so that
the [LIMIT] indicator lights only occasionally.
Set the [MIC/LINE] switch to the [MIC] position.
Lower the input level or the output level until the [LIMIT] indica-
tor lights occasionally.
Prohibited
More than 45° from
a right angle
More than
45°
45°