Yamaha CBR15 Посібник користувача - Сторінка 6
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Using the BBS251 baton bracket
CAUTION
In order to prevent the unit from falling down, attach the safety wire as shown in the
illustration.
Pullback point (only for CBR15 and CBR12)
• When the unit is shipped from the factory, a seal is
stuck on the pullback point (screw hole). Make sure to
peel off the seal when using the pullback point.
Symptom
• The CBR10 does not have a pullback point.
No sound.
The cable is not connected properly. • Connect the cable all the way in so that it is firmly
Upper rear of the unit
Howling sound
A microphone is directed toward the
is produced
speaker.
(feedback).
The sound is amplified too much.
The amplifier
Installation using eye bolts
The total impedance of the
shuts down.
speakers is less than the minimum
load impedance of the amplifier.
Example: More than two speakers
Attach commercially-available eye bolts (M8 x 15 mm) to the screw holes located at the bottom (two
(eight ohms) are connected to a
locations) and on the upper rear (one location, only for CBR15 and CBR12). Keep in mind that you will
power amplifier, the load impedance
need two points at the bottom to suspend the unit.
of which is six ohms.
CAUTION
High frequency
The protection circuit is operating in
Make sure to use eye bolts according to the standards and safety regulations in your area.
range is
the HF unit.
attenuated.
If any specific problem should persist, however, please contact your Yamaha dealer.
Baton diameter
f
f
34 -
Troubleshooting
Possible causes
Pullback point
(M8 screw hole)
M8 eye bolt
51
Max. 45°
Securing the screws and eye
bolts
• Insert the screw or eye bolt through the
washer to attach them.
in place.
• If the speakON connector is used, connect to "1+"
and "1-" and turn the plug to be locked.
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.
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.
Refer to "Protection circuit" in the NOTICE.
Max. 45°
Possible solution
Apply thread-locking
fluid to the eye bolt
(Pullback point for
CBR15 and CBR12 only)