User Manual

14
Tro ubleshooting
 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).
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 all the way in so that it is firmly in place.
Power suddenly went off.
The protection system has been acti-
vated, 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 the cable all the way in so that it is firmly in place.
Sound is interrupted suddenly.
The protection circuit has been activated,
muting the output.
Wait until the amplifier cools down. If the unit won’t automatically
reset itself, turn off the power, and then on again.
Sound howls (feedback).
A microphone is directed toward the
speaker.
Aim the speaker away from the area where the microphone
picks up sound.
Sound is amplified too much.
Lower the volume of input device and locate the microphone
more closely to the sound source.
Each speaker sound differs
(if multiple speakers are used).
Settings for each speaker differ.
Set the [HPF] switch and [D-CONTOUR] switch of each speaker
to the same positions.
Sound is
distorted.
The [LIMIT]
indicator is off.
Input volume is excessive.
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.
The [LIMIT]
indicator is on.
Output volume is excessive.
Turn the [LEVEL] knob to lower the output level to a point so that
the [LIMIT] indicator lights only occasionally.
The microphone volume is too
low.
The [MIC/LINE] switch is set to [LINE]. Set the [MIC/LINE] switch to the [MIC] position.
Low and high frequency are
unbalanced.
The output limiter is active.
Lower the input level or the output level until the [LIMIT] indica-
tor lights occasionally.
0°
45°
Max. 45°
Correct: Within 45° from a right angle
Incorrect: Do not suspend the eye bolts as shown in the illustrations below.
Prohibited
Only one
suspension point
More than 45° from
a right angle
More than
45°
More than
45°
Prohibited Prohibited Prohibited