Yamaha MX-50 - Troubleshooting Common Issues; No Power or No Sound; Sound Ceases Suddenly; Protection Indicator; Unnatural Sound or Lack of Bass

TROUBLESHOOTING
Before
assuming
that
your
amplifier
is
faulty,
check
the
following
list.
If
you
still
have
any
doubts
or
questions,
contact
your
nearest
YAMAH.
dealer.
|
|
No power even when the e The power cord is not plugged in securely. e Plug in securely.
POWER switch is ON.
No
sound
is
heard
from
the
left
|
e
The
speaker
cords
are
not
properly
connected.
|
e
Check
speaker
connections
and
correct
them.
and/or right speaker(s). |
Pr (s) e Either or both LEVEL controls are set to — dB. e Adjust the appropriate LEVEL control(s).
e The cords from the control amplifier are notsecure. | e Connect them securely.
e The control amp's balance is set to the extreme left | e Adjust the control amp's balance control.
or right.
The
sound
ceases
suddenly,
e
The
speaker
protection
circuit
has
activated.
e
Turn
power
OFF,
then
ON
again
to
resetthe
speake
and
the
PROTECTION
indicator
protection
circuit.
Alsó
see
CONNECTING
SPEAK
is lit. | ERS on p. 4.
e There is a malfunction in the amplifier. e Consult your YAMAHA dealer.
Unnatural sound lacking bass. | e The speaker polarities are reversed. ` | E e Connect the speaker wires with the correct + an
— polarity.