EasyManua.ls Logo

Marantz EQ551 - Block Diagram; Schematic Diagram and Component Locations

Marantz EQ551
6 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
@®
2
kHz
EQCONTROLS
Enhances
the
sibilance
of
vocals.
@
4
kHz
EQ
CONTROLS
Controls
harsh
and
edgy
sound.
Raising
this
control
will
enhance
the
brightness
of
brass.
@
8
kHz
EQ
CONTROLS
Controls
the
brightness
of
the
sound.
Raising
this
control
will
increase
the
distinctive
harmonics
of
string
instru-
ments.
@
16
kHz
EQ
CONTROLS
Affects
not
sound
but
atmosphere.
Raising
this
control
will
increase
the
delicacy
of
the
instruments.
@
SPECTRUM
ANALYZER
DISPLAY
This
display
is
a
bar
graph
consisting
of
11
bars,
which
beginning
from
the
left
indicate
the
strength
of
the
fre-
quency
components
corresponding
to
controls
@
through
@
.
The
bar
at
the
far
right
indicates
the
total
level,
with
no
relationship
to
frequency.
@
inPuT
ATT.
SWITCH
The
maximum
allowable
input
level
for
the
EQ551
is
quite
high,
but
for
an
even
higher
input
level,
press
this
switch
for
sound
with
no
distortion
up
to
an
input
level
of
10V.
This
switch
functions
regardless
of
the
position
of
the
EQ
REC
ON/OFF
switch
@.
@
£0
ON/OFF
SWITCH
When
this
switch
is
in
the
OFF
position,
the
signals
from
the
LINE
IN
terinals
@
are
output
directly
to
the
LINE
OUT
terminals
@.
The
same
is
true
for
the
TAPE
IN
and
TAPE
OUT
terminals.
When
in
the
ON
position,
the
signals
from
the
LINE
IN
terminals
are
equalized
and
output
through
the
LINE
OUT
terminals.
@)
EQ
REC
ON/OFF
SWITCH
Set
this
switch
to
the
ON
position
to
record
equalized
signals
onto
a
tape
recorder.
@
TAPE
MONI.
SWITCH
(ON/OFF)
This
switch
is
used
to
monitor
the
output
from
a
tape
recorder.
Use
this
switch
in
the
OFF
position
to
listen
to
the
source
(FM,
CD,
etc.)
selected
with
the
amplifier’s
func-
tion
switch.
@
DISPLAY
SWITCHES
This
switch
is
used
to
select
the
operation
mode
of
the
display.
1.
Both
out:
Microphone
input
level
is
displayed.
2.
UL
depressed:
Left
channel
level
is
displayed.
3.
R
depressed:
Right
channel
level
is
displayed.
4.
Both
depressed:
Total
level
of
left
and
right
channels
is
displayed.
®
PINK
NOISE
SWITCH
Use
this
switch
when
utilising
pink
noise
te
compensate
the
sound
field.
Pink
noise
is
output
from
both
the
left
and
right
channels.
@
MICROPHONES
JACK
(MIC)
Use
this
jack
to
connect
the
included
condensor
micro-
phone.
@
DISPLAY
LEVEL
CONTROL
Use
this
control
to
change
the
level
of
the
display.
When
turned
clockwise
the
height
of
the
bar
graph
is
increased.
@
DECAY
TIME
SWITCH
Use
this
switch
to
change
the
speed
of
the
display
in
two
steps.
USAGES
A)
NORMAL
EQUALIZER
USAGE
1.
Set
the
amplifiers
TAPE
MONITOR
switch
to
“TAPE”.
2.
Set
the
TAPE
MONITOR
switch
@
to
“OFF”
or
“ON”.
3.
Use
the
EQ
controls
for
the
various
frequencies
to
obtain
the
desired
frequency
response.
B)
RECORDING
ONTO
A
TAPE
RECORDER
1,
To
record
without
equalizer
compensation,
set
the
EQ
REC
switch
to
the
“OFF”
position.
2.
To
record
with
equalizer
compensation:
a)
Follwoing
the
procedure
in
A)
above,
adjust
the
controls
for
the
different
frequencies.
b)
Set
the
EQ
REC
switch
to
the
ON"
position.
—
C)
COMPENSATION
USING
THE
MICROPHONE
1.
Connect
the
included
condensor
microphone
to
the
MIC
jack
@.
The
power
for
the
microphone
is
supplied
by
the
EQ551.
2.
Set
the
DISPLAY
LEVEL
control
to
MAX.
3.
Press
the
PINK
NOISE
switch
and
check
that
pink
noise
is
output
from
both
the
left
and
right
speakers.
4.
Turn
the
balance
contro!
on
the
pre-main
amplifier
to
the
left
side
so
that
sound
is
only
heard
from
the
left
speakers,
5.
Adjust
the
volume
of
the
pre-main
amplifier
so
that
the
display
on
the
spectrum
analyzer
is
not
too
high.
If
it
is,
decrease
the
amplifier’s
volume
or
turn
the
DISPLAY
LEVEL
control
counterclockwise
to
de-
crease
the
sensitivity.
6.
Adjust
controls
@
through
@
to
the
desired
level.
7.
Once
the
left
channel
has
been
adjusted,
turn
the
balance
control
to
the
right
side
and
adjust
the
right
channel
in
the
same
way.
~~
SPECTRUM
ANALYZER
The
audible
frequency
range,
from
20
Hz
to
20
kHz,
is
divided
in
ten
parts.
The
spectrum
analyzer
displays
the
component
of
each
of
these
frequencies,
that
is,
the
distribution
of
energy
among
the
different
frequerncies
in
the
music.
This
energy
distribution
changes
constantly,
and
the
height
of
the
bars
on
the
display
vary
in
function
of
these
changes.
There
are
a
total
of
11
bars
on
the
graph.
The
larger
bar
at
the
far
right
indicates
the
total
level,
with
no
relationship
to
frequency.
When
using
pink
noise
to
compensate
the
sound
field
of
the
room
and
all
the
bars
are
at
the
same
height,
the
frequency
response
is
flat.

Table of Contents

Other manuals for Marantz EQ551

Preview: Service Manual
Service Manual14 pages