Troubleshooting - Yamaha CS-15 Owner's Manual

TROUBLESHOOTING
C
Sounds
that have
been
set
are not heard.
Set to the basic
setting
shown on
page
7.
Are sounds heard?
Are
the controls of the
amplifier
normal?
}
Has the Synthesizer Amplifier
Speaker connections been
properly
made?
NO SOUND
During operation, sounds
have ceased to
come
out.
As
the cut-off
frequency
in
the
case
of
LPF and
BPF
has
become
too
low,
it
cuts
even
fundamental
component, thus preventing
sounds
from being produced.
It
is
caused
by
the position of the
CUT OFF
FREQ
knob and
the
BRILLIANCE
lever.
Another
case
is
seen
in
which
—
envelope
has been too
much
deepened.
Restore
setting to the basic
setting
shown on
page
7.
(After
th
ation
st
matter
1
thoroughly checking each
item,
if
the
situ-
ill
cannot
be remedied, please refer th
to
your nearest
YAMAHA
service
shop
During performance, sounds have
suddenly ceased
to
come
out.
is
there any disconnected
power
cord or connection cord
of the
amplifier or synthesizer?
^
7"\
he
J
Faint
sounds (Volume
will not increase.)
Are
the
VOLUME
controls of the
synthesizer
and
amplifier
properly set?
Are
the amplifier's sensitivity
and
output
large
enough?
}
Is
setting of the
EG
selected
by
VCA
normal?
}
The
volume
will
change depending
upon
the
VCA
envelope forms.
The volume
will
change
large
even
if it is
adjusted
with
CUT OFF FRQ
knob and
BRILLIANCE
lever. In
particular,
in
BPF and HPF,
if
the
cut-off frequency
is
set
too high,
faint
volume
will arise.
OPERATES BUT
NOT
IN
A
NORMAL
MANNER.
Sounds
come
out but
are
not normal.
Other controls
do
not
work.
If
sounds have
been normal
at the
basic setting
shown
on
page
7,
then the trouble
is
due to the
misoperation of controls.
As the controls of the
EG
are
correlated, setting
is
to
be
carried
out with the function
of each switch kept
in
mind.
If
setting of
A
and
D
of
EG
selected
by
VCF
is
small
and
EG
DEPTH
is
set
deep,
a click will
be
heard.
*J
Please read
the contents
of the Owner's
Manual
carefully to
understand the func-
tions of respective controls
and switches to
ensure proper operation of
them.
c
When
you
find
it
difficult to
remedy you
trouble after
checking each point
mentioned
above, please consult
your
dealer or nearest
YAMAHA
service shop.