Sony STR-6055 Setup guide

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SO
N Y
STEREO RECEIVER
STR-6055
OWNER'S
INSTRUCTION
MANUAL

www.SteamPoweredRadio.Com
The SONY model STR-6055 is an FM s tereo / FM-AM Receiver
which provides brilliant sound and versatile operation in your
s tereo system .
Before operating the STR-6055, read this instruction manual
carefully and save it for future reference .
TABLE OF CONTENTS
PREPARING FOR USE ..
Unpacking ........ ......
System Connections .. ..
Antennas
Speakers ..........
Record players
2
2
2
4
5
5
Tape recorders . .......... .... .. ..... ....... ......... .. . ....... ......... .. 6
Headphones .... ..... .. .. ..... ..... .. .. ............ ...... ......... ......... .. 6
Ground connection
Power connect ion ... ...... .. ...... ......... .
Custom Mounting . ............. ......
TAC-5E cabinet ...... ...... ..... .......
Panel
mounting . . ....... ........ .. . ..... ... ..... .
OPERATING
INSTRUCTIONS ......... .
Location of Controls and Connectors .. ......... ........ ...
Function of Controls ...................... .. ....
How to Use Your STR- 6055 for FM Reception
How to Use Your STR-6055 for AM Reception
Using Your STR-6055 with External Inputs .......... ..........
6
6
6
6
6
7
7
7
9
9
9
With a record player ................................................... 9
With a tape recorder ....... .. ....... ................... ....... .... ..... 9
Balancing the Stereo System .. ......................... ... ............ 10
Stereo balance . .................... ............ ....... ... ..... ..... .. ..... 10
Speaker phasing check .... .. ........... .... ........................... 10
CARE OF YOUR EQUIPMENT . ......... ..... .. .. .. .................. ..... 10
Cleaning .................. ...... ... ...... ............................. 10
Trouble Checks ....... ... ................................. .. ... .............. 10
Repacking for Shipment. ..................................... ............ 11
TECHNICAL DATA .. .. .. . .. . ...... ..... ............. .. .... ........ 11
Technical Specifications ..... .. .. ........................ .. ................ 11
Block Diagram .... .. ........... ... .. .......... ........ ...................... . 12

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AM 411111
AU X2 -- ..

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PREPARING FOR USE
WARRANTY
An
application
for
free
3-
year
factory
service
warranty
is
included
with
the
STR-6055
. Fill in
the
application
and
mail
it
within
10
days
of
the
date
of
purchase
.
UNPACKING
All SONY
equipment
comes
to
you
carefully
packed in
cartons
designed
to
withstand
the
rigors
of
shipment.
Do
not
throw
this
carton
or
the
associated
packing
material
away;
they
will
come
in
handy
if
you
ever
have
to
transport
or
ship
your
STR-6055.
Inspect
your
STR-6055
immediately
for
signs
of
damage
incurred
in
transit.
If
damage
has
occured,
consult
your
local
SONY
dealer
for
further
instructions
. Once again, save all
packing
materials;
it
will
substantiate
your
damage
claim
.
SYSTEM
CONNECTIONS
No
doubt
you
have
already
decided
on a
location
for
your
STR-
6055.
However,
before
go
i
ng
ahead
with
the
installation
, make
sure
that
your
choice
of
location
agrees
with
the
following
list
of
DO's and DON'
T's
.
DO
DO
allow
at
least 1
inch
clearance
around
the
STR-6055
for
ventilation.
allow
sufficient
room
behind
the
STR-6055
so you can
make
connections
to
the
rear panel
without
disrupti
ng
your
entire
setup
.
DON'T
remove
the
chassis cover. Refer
servicing
to
qualified
personnel.
DON'T
place
the
STR-6055
in
direct
sunlight
,
or
near
radiators,
hot-air
ducts,
or
any
other
source
of
heat
.
Similarly,
don't
place
it
in
any
area
subject
to
freezing
temper
-
atures
or
excessive
moisture.
DON'T'
place
the
STR-6055
on
any
soft
surface
which
may
block
the
bottom
ventilation
holes
.
DON'T
place
anything
on
top
of
the
cabinet
which
might
block
the top
ventilation
slots.
DON
'T
connect
the
STR-6055
to
power
sources
other
than
those
for
which
it
is designed.
The
proper
power
source
is
117
volts
,
60
Hz (cycles) ac. Do
not
operate
the
receiver
where
the
line
voltage
is
over
1
28
volts
.
After
you
have
found
a
suitable
location
for
your
STR-6055,
you
can
begin
making
the
basic
connections
described in
the
following
paragraphs. Refer
to
the
dverall-system
connection
diagram
while
making
these
connections
.
2
A-m
external antenna Fm extern
al
antenna
Fm ribbon antenna
Antennas
Ground
w
ir
e
to
ground
l H
U·~'
Record player with a
magnetic
ca
rtridge
Connecting cord
RK
-
81
j
~
to
line outputs
to
I
AUX
21
(
front
paneO
FM
0
GROU
ND
ANTE~•
~N""
8
"---;-,.=-i--,-=.._;;;
MA
lN
t
D 1 1 I Remote speakers
REMOTE
AC
OU
TLE
r
500W
Connecting cord
RK
-74
Stereo tape recorders
ib:===l=
t=o,;,J=H=
EA
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HO
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fr
=
on
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===
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to an wall
outlet
to
auxi
liary
inputs
I
I
I
I
I
I
I
I
I
I
I
I
to
REC
/
PB
Headphones
3

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Antennas
The
sensitivity
of
the
STR-6055
is so
great
that
in
most
areas
it
will
work
well
with
simple
antennas
such
as
the
ribbon
dipole
antenna.
However,
for
the
very
best
fm
reception
pos
s
ible,
particularly
at
problem
locations
, a
more
elaborate
antenna
may
be
necessary
.
The
factors
determining
the
minimum
antenna
requirements
for
your
location
include
the
following
:
1.
How
strong
are
the
fm
signals
in
your
neighborhood?
2.
Are
all
the
fm
stations
in
the
same
direction
,
or
are
they
scattered
all
over?
3. Is
multipath
reception
a
problem?
As
far
as
signal
strength
is
concerned,
many
city
dwellers
do
extremely
well
using
just
a
ribbon-type
fm
dipole
or
the
familiar
"
rabbit
ears
".
The
rabbit
ear
antenna
is
the
more
preferable
of
the
two
since
it
can
easily
be
rotated
and
otherwise
adjusted
for
best
reception
.
However
, in
the
far
suburbs,
a
high
-
gain
highly-directive
outdoor
fm
antenna
is
necessary
to
secure
the
best
signal
-
to-noise
ratio
on
stereo
broadcasts.
Omnidirectional
antennas
are
quite
handy
if
the
local
fm
stations
is in
different
directions
and
you
don't
want
to
use a
rotator.
However,
if
"fm
ghosts"
(multipath
reception)
cause
the
problems
described
in
the
next
paragraph,
you
must
use a
highly-directive
antenna
and
rotator,
or
several
highly-directive
fixed
antennas
.
4
Ribbon dipole antenna,
rabbit
ears
type antenna
Directional
outdoor
antennas
Multi-element type
8
Dipole antenna picks
up
signa
ls
from
both
the
front
and rear equally well.
Increased sensitivity
to
front
signals
Reduced sensitivity
to
rear signals
High
frontal
sensitivity
Low
sensitivity
to
rear signals
Multi-element type
has
narrower
pickup
pa
ttern
Multipath
Reception
Good
fm
reception
depends
not
only
on
the
sensi
tivity
of
the
tuner
but
on
the
quality
of
the
received
signal.
The
mo
st
important
factor
affecting
signal
quality
is
"multipath
"
reception
.
Multipath
reception
is
the
arrival
of
a
signal
at
an
antenna
from
several
points,
the
result
of
signal
reflections
from
tall
buildings
or
bridges
,
just
to
cite
a
few
examples
.
These
signals
arrive
at
the
antenna
at
different
times,
depending
upon
the
lengths
of
the
paths
they
travel.
The
addition
of
these
signals
at
the
tuner
can
produce
audible
distortion
and
loss
of
channel
separation
.
Multipath
reception
is a
condition
that
depends
solely
upon
the
surroundings
and
local
terrain
.
Direct
signal
?,e\\ecte
ci
s\gnal
An
antenna
which
~
has
high
frontal
sensitivity rejects
the reflected signals. -.·_.
•··
''%
OJ
.
Connecting
the
FM
Antenna
Lead
The
STR-6055
accepts
300-
ohm
transmission
line
(twin
lead).
The
300-ohm
twin
lead
may
be
either
the
standard
or
shielded
type.
Standard
300-ohm
twin
lead is
inexpensive
and
will
be
perfectly
adequate
for
most
installations.
However
, in cases
where
local
noise
or
multipath
pickup
on
the
transmission
line
causes
interference,
a
shielded
transmission
line
must
be used.
A
matching
transformer
can
be
used
,
but
300-ohm
shielded
twin
lead is
preferable
because
most
fm
antennas
are
designed
to
directly
match
a
300
-
ohm
impedance
line
.
To
connect
standard
300-ohm
twin
lead
to
the
STR-
6055,
loosen
the
ANTENNA
terminals
marked
FM
300
Q.
Strip
the
plastic
insulation
from
the
two-conductor
lead-in
wire
and
wrap
each
conductor
around
a
terminal.
Tighten
the
terminal
screws
.
To
connect
shielded
300
-ohm
twin
lead
to
the
STR-6055
,
connect
the
two
conductors
as
described
above
,
then
connect
the
shield
drain
wire
to
the
GROUND
terminal
on
the
antenna
terminal
plate.
GROUND FM

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Antenna
Orientation
First,
tune
in
the
desired
station
by
adjusting
the
TUNING
kn
ob
for
a
center-channel
meter
indication;
then,
adjust
the
antenna
direction
and
height
for
clearest
sound.
o
If
distortion
is
audible,
adjust
the
direction
and
/
or
height
of
the
antenna
until
the
distortion
is
eliminated
.
Often
a
slight
turn
will
be
sufficient.
o
In
some
cases
multipath
reception
on
two
or
more
stations
may
require
the
antenna
to
be
p.Jinted in
several
different
directions.
An
effective
and
relatively
inexpensive
solution
to
this
problem
is
the
use
of
a
remote-controlled
antenna
rotator.
o
Keep
the
antenna
lead-in
wire
as
short
as
possible
and
avoid
long
horizontal
runs
to
minimize
signal
pickup
on
the
line
.
The
use
of
shielded
cable
is
recommended
in
multipath
areas.
o
If
an
outdoor
antenna
cannot
be
erected,
use
a
good
indoor
antenna;
rabbit
ears
are
satisfactory.
Adjust
the
antenna
for
minimum
distortion
by
listening
to
the
quality
of
the
sound
.
A
-m
Reception
Pull
down
the
built-in
bar
antenna
located
at
the
rear
of
the
set. In
most
cases,
this
ferrite-bar
antenna
will
provide
optimum
a-m
reception.
In
difficult
reception
areas
an
outdoor
antenna
will
be
helpful.
Connect
a
length
of
wire
,
at
least
16
feet
long
,
to
the
AM
ANTENNA
terminal.
The
signal
strength
of
the
a-m
station
is
indicated
on
the
tuning
meter
;
the
stronger
the
signal,
the
greater
the
deflection
toward
the
right.
Speakers
The
STR-6055
can
drive
two
speaker
systems
,
main
and
remote,
simultaneously
or
independently.
B
oth
systems
are
turned
on
or
off
with
the
SPEAKER
selector
on
the
front
panel.
The
speakers
connected
to
these
terminals
should
have
an
impedance
of
4-
16
ohms.
Location
:
In
many
home-entertainment
stereo
systems
,
the
choice
of
speaker
location
is
often
limited
by
the
existing
fur-
niture
arrangement.
However,
if
rearrangement
is
possible
,
or
you
wish
to
furnish
the
area
specifically
for
stereo
li
stening
,
here
are
a
few
suggestions
for
optimizing
your
listening
pleasure
.
Set
up
your
speakers
in a
large
room
having
a
rug
on
the
floor
.
If
the
room
has
heavy
drapery,
so
much
the
better
.
Rugs
,
dra-
pery,
and
upholstered
furniture
minimize
the
multiple
reflections
of
high-frequency
sound
that
occur
in a
bare
room
and
which
degrade
the
stereo
effect
.
The
usual
speaker
location
is on
the
floor
against
a
wall.
If
you
must
position
the
speakers
off
the
ground,
do
not
put
them
higher
than
eye-level.
Because
of
psychological
conditioning,
sound
coming
from
the
vicinity
of
the
ceiling
gives
an
unnatural
feeling
.
Corner
locations
,
however,
are
ideal
for
emphasizing
the
bass
notes
.
The
distance
between
the
right-
and
left-channel
speaker
system
in a
stereo
system
is
important
to
the
stereo
effect.
Closely-
spaced
speakers
produce
minimum
stereo
effect
.
Widely
-sepa-
rated
speakers
produce
maximum
stereo
effect,
although
if
the
separation
is
too
great,
the
unnatural
"ho
le
-in-the-midd
le "
effect
appears
.
The
proper
distance
between
speakers
is
directly
re-
lated
to
the
distance
from
the
speakers
to
the
listening
areas
.
In
most
cases,
fine
results
are
obtained
if
the
speakers
are
separated
by
an
amount
slightly
more
than
the
distance
from
the
listening
area
to
each
speaker.
In
any
case,
experiment
with
different
speaker
and
l
isten
ing
locations
until
you
find
the
setup
that
pleases
you
most
.
Cable
Type:
The
type
of
wire
used
to
connect
the
speakers
to
the
receiver
is
not
critical
in
most
home
stereo
systems
.
Ordi-
nary
dual
-
conductor
lamp
cord
is
often
used
for
this
purpose
.
Common
18
gauge
lamp
cord
is
fine
for
distances
of
under
35
feet.
However
,
14
to
16
gauge
wire
may
be
needed
for
long
runs
to
low
impedance
speakers
to
prevent
excessive
power
losses in
the
wiring
.
If
you
use
lamp
cord
or
any
other
stranded
wire,
make
sure
that
none
of
the
strands
separates
from
its
group
and
shorts
across
the
speaker
or
receiver
terminals.
Connection:
Connect
your
speaker
system
to
the
MAIN
SPEAK-
ER
terminals
.
Connect
the
right
and
left
speakers
to
the
R
and
L
speaker
terminals
respectively.
To
properly
phase
the
speakers
,
make
the
connections
so
that
the
positive
(+ )
terminal
of
the
speaker
connects
to
the
positive
(+ )
terminal
of
the
STR-6055,
and
the
remaining
lead
of
the
cord
connects
the
negative
(- )
terminals
on
the
speaker
and
the
receiver
.
This
is easy
to
do
if
one
of
the
wires
in a
lamp
cord
pair
is
coded.
Most
lamp
cord
is
coded
by
means
of
a
ridge
molded
along
one
conductor,
or
a
colored
thread
included
with
the
stranded
wires
of
one
conductor.
If
you
are
also
using
remote
speakers,
connect
them
to
the
REMOTE SPEAKER
terminals
as
described
above
.
Notes
on
Input
Connections
For
input
connections,
use
low
capacitance
shielded
cable
.
Keep
the
cables
as
short
as
possible.
When
reconnection
is
required,
turn
the
VOLUME
control
counter-
clockw
ise.
To
use
the
supplied
phono
plug,
see
the
illustrations
below
.
Shielded
wire
(available
on
the market) Shield
Core Phono plug
Solder
Solder
Insert
after
soldering
Record
Players
Record
players
equipped
with
a
magnetic
(moving
magnet
or
moving
coil)
cartridge
or
similar
low-output
cartridges
can
be
connected
to
the
PHONO
inputs
of
the
STR-
6055
.
These
PHONO
input
connectors
are
equalized
for
RIAA
characteristics.
If
hum
is
heard
when
playing
discs,
it
is
usually
the
result
of
poor
or
incorrect
grounds
between
the
tone
arm
and
the
STR-
6055
. In
this
case,
connect
a
ground
wire
between
the
turntable
base
and
the
GROUND
terminal
of
the
STR-6055
.
Try
revers-
ing
the
ac
line
cord.
Check
your
turntable;
if
the
tone
arm
is
mounted
on
a
wood
surface,
it
may
be
necessary
to
make
a
ground
connection
between
the
base
of
the
tone
arm
and
the
STR-6055.
5

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Tape
Recorders
Stereo
tape
recorders
can be
connected
to
the
STR-6055
for
playback
and
recording
.
For
playback,
connect
a
stereo
tape
recorder
or
tape
deck
to
the
TAPE
connectors
of
the
STR-6055.
(The
AUX
1,
2
inputs
also
accept
the
output
of
a
tape
recorder
.)
For
recording,
connect
a
stereo
tape
recorder
or
tape
deck
to
the
REC
OUT
connectors
of
the
STR-6055
.
If
your
tape
recorder
or
tape
deck
uses
the
same
type
REC
/
PB
(DIN)
connector
as
that
on
the
STR-6055,
the
record
/
playback
connections
can be
made
with
a
single
REC
/
PB
connector
cable
.
When
the
REC
/
PB
connector
of
your
tape
recorder
is used, dis-
connect
the
input
and
output
connections
between
the
receiver
and
the
tape
recorder
.
Headphones
The
HEADPHONE
jack
accepts
all
low-
and
high-impedance
stereo
headphones
equipped
with
a
standard
binaural
phone
plug.
For
private
listening
,
turn
the
SPEAKER
switch
to
OFF.
The
head-
phone
output
is
not
affected
by
the
SPEAKER
switch.
The
HEADPHONE
jack
can
also
be used as
output
connector.
In
this
case,
the
output
level
can be
adjusted
by
the
use
of
the
VOLUME
controls
on
the
STR-6055.
For
this
connection
,
the
SONY
RK-81
Connecting
Cord is
recommended
.
Ground
Connection
Connect
the
ground
wire
from
the
record
player,
or
other
sound
components
connected
to
the
STR-6055
to
the
GROUND
terminal
of
the
receiver
.
If
hum
occurs
,
connect
the
GROUND
terminal
to
a
convenient
earth
ground,
such
as
the
mounting
screw
of
an ac
outlet
cover
plate.
A
more
direct
earth
ground
(preferably
a
cold-water
pipe) is
recommended
for
lightning
protection
when
an
external
antenna
is used.
Power
Connection
Before
mak
i
ng
any
form
of
power
connection,
make
sure
the
STR-6055's
POW
ER
switch
is OFF. T
hen,
you
can
plug
the
STR-6055
's
line
cord
into
the
ac
line
outlet
. O
nce
again,
the
required
power
source
is 11 7
volts,
60 Hz ac.
The
female
outlet
on
the
rear
panel
is
not
controlled
by
the
P
OWER
switch
on
the
front
panel.
The
connected
component
must
be sw
itched
off
independently.
M
aximum
power
from
this
outlet
is
500
w
atts
.
6
CUSTOM
MOUNTING
T
AC
-5E
Cabinet
An
attractive
oiled
walnut
cabinet
,
the
SONY
TAC
-5E, is
available
as an
optional
accessory
.
To
install
the
receiver
in
this
cabinet
,
proceed
as
follows
:
1.
Remove
the
four
rubber
feet
from
the
bottom
of
the
receiver
and
slide
the
receiver
into
the
cabinet
.
2. Fasten
the
receiver
chassis in
place
with
the
four
long
s
crews
supplied
with
the
TAC
-5E.
The
screws
pass
through
the
rubber
feet
,
the
bottom
of
the
cabinet
, and
into
the
receiver
.
0
Although
the
STR-6055
dissipates
little
heat
,
make
sure
that
the
cabinet
is
ventilated
adequately
,
and
that
the
ventilation
holes
in
the
STR-6055
are
not
blocked.
Avoid
installation
in
locations
subjected
to
excessive
dust
or
moisture.
Ii>
Ii>
...
TAC
-
5E
Panel
Mounting
If
the
STR-
6055
is
to
be
mounted
in a
cabinet,
the
opening
in
the
cabinet's
panel
sh
ould
conform
to
the
dimensions
given
in
the
illustration.

www.SteamPoweredRadio.Com
OPERATING
INSTRUCTIONS
LOCATION
OF
CONTROLS
AND
CONNECTORS
LO
UDN
ESS
switch
VOLUME
controls
POWER switch
H
EA
DPHONE jack
S
PEA
K
ER
switch
BASS TONE co
nt
ro
ls
TREBLE TONE c
ontr
ols
HI
GH FILTER switch
MUTING
swit
ch
FM
ANTENNA
terminals
AM
ANTENNA
termin
al
GROUND
termin
al
PHONO c
onnectors
AUX
1
connectors
TAPE c
onnectors
REC
OUT
connectors
REC
/
PB
connector
CT
0
F
CO
T
Before
attempting
to
operate
yo
ur
STR-
6O55
,
take
a
few
min-
utes
to
learn
the
functi
on
and
location
of
the
control
s,
and
other
parts
mentioned
in
the
operating
instructions
.
The
locati
ons
are
shown
in
the
illu
s
tratio
n,
and
the
functions
are
described
below.
POWER
switch
Turn
s
the
o
perating
power
on or o
ff
.
The
di
al
will
light
wh
en
this
switch
is s
et
to
ON.
VOLUME
controls
TUNING met
er
TUNIN
G kn
ob
STER
EO
indicator
AUX 2 conn
ecto
r
FUNCTION
se
lect
or
knob
FUNCTION
se
l
ec
t
or
lever
MONITOR
sw
it
ch
MODE
se
l
ec
tor
Bar
ant
enna
MAIN SPEAKER t
er
minals
REMOTE SPEAKER terminals
Ac
power
c
ord
AC
OUTLET
Regulate
the
so
und
level
of
ea
ch
channel.
A
fricti
on
clutch
permits
both
knob
s to
rotate
simultaneously
or
separately
.
The
upper
kn
ob
con
-
trols
the
right
channel
,
and
the
lower
knob
co
nt
rols
the
left
channel.
To
increase
the
so
und
level,
turn
the
knobs
clockwise
.
Do
not
tune
in a
s
tation
or
change
the
input
source
with
these
controls
set
for
a
high
so
und
level.
For
balancing
the
stereo
sound
,
turn
one
knob
while
holding
the
other
s
tationary
.
7

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LOUDNESS switch
When listening at low sound level s, s et thi s switch to ON. In
this position , an equalization network is switched into the circuit
to compensate for the change in the tonal response of human
hearing at low sound levels . The LOUDNESS switch will boost
the low - and high - frequency response to provide an apparently
flat output .
SPEAKER switch
REMOTE position:
OFF position :
MAIN position :
BOTH
position :
For using the remote speakers only.
To swit ch the speakers off. For private lis-
tening, insert any low- or high-impedance
stereo headphones into the HEADPHONE jack
and set the switch to this position .
For
using the main speakers only .
For
using both main and remote speakers
simultaneously .
BASS TONE controls
Turn these controls clockwise to increase the low-frequency
MODE selector
Operate as follows :
Position
-
REVERSE
---
---
STEREO
L+ R
LEFT
I RIGHT
MONITOR switch
Input
L (left)
R(right)
L
R
L
R
L
R
L
R
--
Output
=======--======
L (left)
R(right)
L
R
---
>-------< L
R
--
-----------=-
L
R
-=========
L
R
Taped programs connected to the TAPE connectors or to the
REC / PB connector can be played back by setting this selector
to TAPE. For all other program sources , set this switch to
SOURCE and set the FUNCTION selector lever and knob to their
proper positions.
This selector can also be used as a source / tape comparator when
using a 3-head tape recorder or tape deck. The recording signal
is monitored when the switch is set at SOURCE. In this case,
the recorder should be connected to the TAPE and REC OUT
connectors of the STR-6055.
FUNCTION selector lever
PHONO position : Enables you to listen to records played
Center position :
AUX 1 position :
8
on the phonograph connected to the
PHONO connectors on the rear panel.
Enables you to listen to the program
source determined by the FUNCTION
selector knob.
,--- F UNC TIO N:___.,
A\.110 STCREO-- FM
, M ON0-
1------ ~( ux >- @
Selects the input source connected to
the AUX 1 connectors on the rear panel.
I
re s ponse in both channels . The center pos1t1on provides a flat
re s ponse. Left and right channels can be controlled independently .
TREBLE TONE controls
Turn the se controls clockwise to increase the high - frequency re-
sponse in both channels . The center position provides a flat
response . Left and right channels can be controlled independently .
HIGH FILTER switch
Set this switch to ON to insert this filter. This switch reduces
high-frequency noise such as the surface noise of discs or tapes
when reproducing old or poor quality recordings , or high-
frequency distortion in discs or tapes.
MUTING switch
This switch is usually set to ON. In this position, fm interstation
noise is eliminated while tuning from station to station. However ,
very weak stations may also be muted along with the noise.
Therefore, weak stations must be tuned with the MUTING switch
set to OFF. In this case, keep the volume down when detuning
to avoid the sudden change in noise level.
Use
--
Reverses right and left stereo sound.
Normal stereo sound
For balancing right and left channel sound level
For
recording with a monaural tape recorder
Delivers left or right channel only, according to the
position LEFT or RIGHT.
I
FUNCTION selector knob
FM AUTO STEREO
position :
FM
MONO position :
AM position :
AUX 2 position :
Enables
you to listen to the fm stereo
programs.
In this position the set will automatically
switch to stereophonic reception when a
multiplex fm stereo program is tuned in.
When the program source is changed to
a monophonic signal, the STR-6055 will
automatically switch to monophonic
reception .
Provides monophonic reception of fm
stereo and monophonic programs.
Use this position if an fm stereo program
is weak or noisy.
Enables you to listen to a-m broadcast
programs.
Selects the program source connected to
the AUX 2 input (binaural jack) on the
front panel.

www.SteamPoweredRadio.Com
Po
s
ition
of
the P
ositio
n
of
th
e
To
listen
to
FUNCTION FUNCTION
selector l
eve
r
se
lector
knob
AUX
1
input
source
r
•ux,
a
ny
phonograph records
!_
eaoNo
any
AUTO
S
TEREO
-
0
FM
fm
stereo program
FM
fm
monophonic
OONO
-
program
,_
(}AM
a-m
broadc
as
t
program
AUX
2
input
source
G-AUX2
TUNING
knob
Turn
this
knob
to
tune
in
the
desired
station
. Use
the
tuning
meter
to
facilitate
tuning
.
Tuning
meter
1
1~~
11
Indicates
the
relative
signal
strength
of
the
selected
a-m
station
,
and
channel
center
for
the
selected
fm
station
. U
se
this
meter
to
precisely
tune
your
receiver
.
STEREO
lamp
The
red
stereo
lamp
will
light
when
an
fm
stereo
program
is
tuned
in.
Also,
the
lamp
will
usually
light
on
excessive
noise
.
HOW
TO
USE
YOUR
STR-6055
FOR
FM
RE:Cl:PTION
1.
Tu
rn
the
POWER
switc
h
to
ON.
2.
Set
the
MONITOR
se
l
ecto
r
to
SOURCE.
3.
Set
the
SPEAKER s
wit
ch to
the
proper
position
.
4.
S
et
the
MODE
switc
h
to
STEREO
and
the
MUTING
switch
to
ON.
5. S
et
the
FUNCTION
select
or
lever
to
the
center
position
and
the
FUNCTION
selecto
r
knob
to
AUTO
STEREO.
6.
Tune
in
th
e
desired
stat
i
on
by
turning
the
TUNING
knob.
Th
e
pointer
of
the
tuning
met
er
will
be
centered
when
a
sta
tion
is
correctly
tuned
in.
Whe
n
the
program
is stereo-
phonic
,
the
STEREO
lamp
will
light.
7.
Adju
st
the
so
und
level
and
tone
q
uality
by
turning
the
VOLUME,
BASS
and
TREBLE
TONE
con
trol
s.
8.
If
necessary
, set
the
HIGH FILTER s
witch
to
ON to
eliminate
high
frequency
noise
(hiss).
When
listening
at
low
sound
l
eve
ls,
if
desired,
push
the
LOUDNESS
swi
tch
to
ON.
HOW
TO
USE
YOUR
STR
6055
FOR
AM
RFr.FPTIO
1.
Flip
th
e POWER
swi
tch
to
ON.
2.
Set
the
MONITOR
s
witch
to SOURCE.
3.
Set
the
SPEAKER
switch
to
the
proper
position
.
4.
Set
the
MODE
selector
to
the
desired
position
.
5.
Set
the
FUNCTION
selector
lever
to
the
center
position
and
the
FUNCTION
se
lector
knob
to
AM.
6.
Tune
in
the
desired
station
by
turning
the
TUNING
knob
.
The
pointer
of
the
tuning
meter
will
swing
rightmo
st
when
a
station
is
correctly
tuned
in.
7.
Adjust
the
sound
level
and
tone
quality
.
8.
If
necessary
, use
the
HIGH FILTER
switch
and
the
LOUD
-
NESS s
witch
.
USING
YOUR
S
fR-6055
WITH
EXTERNAL
DI
I
C:
With
a
Record
Player
1.
Connect
a
record
player
to
the
PHONO
inputs
of
the
STR-
6055
.
2.
Turn
on
the
STR-
6055
and
the
connected
record
player
.
3.
Set
the
MONITOR
switch
to
SOURCE.
4.
Set
the
SPEAKER
switch
to
the
proper
position
.
5.
Set
the
MODE
selector
to
STEREO.
6.
Set
the
FUNCTION
selector
lever
to
PHONO
.
7.
Adjust
the
sound
level
and
tone
quality
.
8.
If
necessary,
set
the
HIGH FILTER
switch
and
the
LOUDNESS
switch
to
ON.
With
a
Tape
Recorder
To
operate
a
tape
recorder
or
tape
deck
with
your
STR-
6055,
proceed
as
follows
:
For
playback
1.
Connect
a
tape
recorder
or
tape
deck
to
the
TAPE
AUX
1
connectors
,
AUX
2
connector,
or
REC
/
PB
connector
on
the
STR-
6055
.
9

www.SteamPoweredRadio.Com
2. T
urn
the STR-
6055
and the tape
recorder
on
.
3. S
et
the
MONITOR
sw
itch
to
TAPE w hen
the
reco
rder
is con-
nected to
th
e TAPE
or
REC
/
PB
connec
t
ors
on
the STR-
6055
.
Wh
en
the
AU
X con
necto
rs are used,
set
the
MONI
-
TOR sw
itch
to SOURCE,
and
set
the
FUNCTION
select
or
leve
r
and
knob
to
the
approp
riate pos
ition
for
th
e i
nput
s used.
4. Set
th
e SPEAK
ER
switch
to
the
proper
position
.
5. S
et
the
MODE
se
l
ecto
r
to
STEREO.
6. Adj
ust
the
soun
d
leve
l
and
tone
quali
ty
.
7.
If
necessary,
se
t the HIGH FILTER
swi
tch
and
th
e
LOUD
-
NESS
sw
i
tch
to
ON.
For
record
i
ng
1. C
onnec
t a tape r
eco
r
der
or tape
deck
to the
REC
OUT
or
REC
/
PB
connec
tors on
th
e STR-
6055
.
2.
Tu
rn the STR-
6055
and
the tape r
eco
r
der
on.
3. Set
th
e
MONITOR
s
wit
ch
to
SOURCE.
Wh
en usi
ng
a 3-head tape
reco
rd
er
,
th
e r
eco
rding
signa
l can
be m
on
it
ored in
th
e SOURCE position and
th
e r
eco
rd signal
can be m
on
it
ored in
the
TAPE pos
it
ion
.
The
n, insta
nt
ane-
ous
tape/ so
ur
ce m
oni
toring is p
ossib
le
by
s
etti
ng
th
e
MONI
-
TOR s
wit
ch a
lt
e
rnat
e
ly
to
TAPE
and SOURCE.
4.
Set
the
SPEAKER s
witch
to
th
e p
rope
r pos
it
io
n.
5. Set
th
e
FUNCTION
se
lector
lev
er
and
k
no
b to
th
e des
ir
ed
pr
ogra
m source positi
on
.
6. Set
th
e
MODE
selector to STEREO position.
If
th
e conne
cted
tap
e r
eco
rder
is
th
e mona
ural
typ
e,
and
th
e
p
rog
ram so
urc
e is ster
eo
pho
nic
, set
th
e
MODE
selector to
L+ R. Record level ad
ju
s
tment
s
mu
st be
made
at
th
e tape
recorder.
BALANCING
THE
STEREO
SYSTEM
As
soo
n as you are
familiar
with
the
opera
ti
on
of
yo
ur
STR-
6055
,
make
the
foll
o
wing
checks and adjus
tment
s
in
yo
ur
s
tereo
s
ystem
to
s
ecure
the
best
possible
stereo lis
tening
.
Stereo
Balance
The
feeling
of
direction
and
depth
th
at
stereophonic
so
und
produces
is
greatly
degraded
if
the
levels
of
both
channels
are
not
balanced
.
Set
the
MODE
selector
to
L+ R,
and
adju
st
the
VOLUME
controls
(hold
one
stationary
while
you
turn
the
o
ther)
Symptom
Remedy
for
equal
output
from
righ
t
and
left
speakers. B
alance
variation
s
wit
h
different
pro
gram
sources
are
due
to
differences
in
the
recording
levels
. S
tereo
ba
l
ance
is also
influenced
by
the acou
s-
tics
of
the
room
. Carpets, f u
rni
ture pl
acement
,
and
room
si
ze
and
s
hape
have
a
defin
ite e
ff
ect
upon
s
ound
qual
ity
and
balance
.
Speaker
Phasing
Check
M
ake
sure
yo
ur
speake
rs are
properly
phased
by
performing
thi
s
simp
le
test
. M
ove
the
rig
ht
-
and
l
eft
-
channel
speakers so
that
th
ey
are
abou
t
one
foo
t
apart
and
facing
each o
th
er. A
dj
ust the
sys
tem
co
ntrols
for
bal
anced
L+ R operat
ion
(by
sett
ing
the
MOD
E
sw
i
tc
h
to
L+ R
and
bal
ancing
the
ou
tput level
s)
.
Li
sten
to a
reco
r
ded
passage
co
nt
aining pro
mi
ne
nt
bass notes. T
hen
,
r
eve
r
se
the connec
ti
on
to
one of
th
e speakers and listen to
the
sa
me bass passage again.
If
it
no
w
sounds
like there is less
bass, the sp
ea
kers were co
rr
e
ctl
y phased
and
th
e
or
igi
na
l
con-
nec
ti
on
should be restored. However, if
th
e bass
appears
to have
increased,
th
e
speakers
wer
e ori
gi
nally phased i
nco
rrec
tl
y and
th
e new
co
nnect
ion
should be used.
CARE OF
YOUR
EQUIPMENT
CLEANING
Fi
nger
pri nt
s,
th
e ki
d's
ch
oco
late can
dy
,
and
si
mi
lar hou
se
hold
annoy
ances
ca
n mar
th
e b
ea
uty
of yo
ur
STR-
6055.
Th
ese can
be cl
ea
ned
up
by
w ipi
ng
th
e panel, knobs or dial glass with a
so
ft
clea n clo
th
moist
ene
d w i
th
water. Do
no
t u
se
any
type
of
sco
urin
g po
wd
er, a
br
as
ive
pad,
or
so
lvent
.
TROUBLE
CHECKS
If
tr
o
uble
with
the
STR-
6055
arises, make
the
foll
o
win
g s
impl
e
che
ck
to
determine
if
the
trouble
is
really
in
th
e
STR-6055
or
ext
e
rnal
to
it
.
Quite
often
hi
-fi e
quipment
fails to w
or
k
pr
o
perly
because
of
inc
orrec
tly
made
sys
tem
conn
ect
io
n
s.
If
the
trouble
per
sists
after
you
have
made
th
ese checks, cons
ult
yo
ur
SONY
dealer
for
further
instruct
i
on
s.
No
audio
and
dial
lamp
does
not
light
.
Check
the
ac
cord
connection
.
No
audio
but
dial
lamp
lights
.
Check
the
s
peaker
connections
.
Set
the
SPEAKER
switch
to REMOTE,
MAIN
,
or
BOTH.
Set
the
MONITOR
switch
to
SOURCE
(except
for
tape
playback)
.
No
audio
from
one
channel
or
unbalanced
Check
connections
to
each
speaker
.
output
Adjust
the
left
and
right
sound
level.
Severe
hum
or
noise
Use
shielded
connection
cables
.
Avoid
long
horizontal
runs
.
Keep
cables
away
from
transformers
or
generators,
and
at
least
10
feet
from
TV
sets
and
fluorescent
lights
.
Reverse
the
ac
plug
in
the
receptacle
.
Ground
the
receiver
.
Poor
reception
Tune
accurately
and
adju
st
the
antenna
. (See
pages
4
and
5.)
Stereo
broadcast
is
noisy
and
distorted
.
Adjust
the
antenna
for
maximum
signal
strength.
(See
pages
4
and
5.)
Set
the
HIGH FILTER
switch
to
ON
and
the
FUNCTION
selector
knob
to
FM
MONO
.
STEREO
lamp
blinks
on
and
off.
Adjust
the
antenna
to
eliminate
weak
or
multipath
reception
.
10

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REPACKING FOR
SHIPMENT
The
STR-6055
's
original
shipping
carton
ar.d
packing
material
(which
we
asked
you
to
save) is
the
ideal
container
for
shipping
the
unit
for
repair
work
,
or
simply
to
another
location
.
However,
to
achieve
the
maximum
protection,
the
STR-6055
must
be re-
packed in
this
material
precisely
as
before
.
The
proper
repack-
ing
procedure
is as
shown
in
the
illustration
.
TECHNICAL
DATA
TECH ICAL
SPECIFICATIONS
FM
Tuner
Section
Tuning
range
Antenna
terminals
Intermediate
frequency
Sensitivity
Image
rejection
1-f
rejection
Spurious
rejection
AM
suppression
Capture
ratio
Selectivity
S/ N ratio
Frequency
response
Harmonic
distortion
Stereo
separation
19
kHz,
38
kHz
87
.5
MHz
-
108
MHz
300
ohms
balanced
10
.
7MHz
2.6 µV, IHF
2.2 µV, S/ N =
30d8
1.8
µV, S/ N=
20
dB
70dB
90dB
100
dB
65
dB
1.5
dB
80
dB
70dB
20
Hz - 15 kHz ± 1 dB
Mono
0.2%
at
400Hz
100
%
modulation
Stereo 0.5% at
400Hz
100
%
moduration
Better
than
38
dB
at
400
Hz
suppression
60
dB
SCA
suppression
55
dB
Muting
level Less
than
5 µV
AM
Tuner
Section
Tuning
range
530
kHz-
1605
kHz
Antenna
Built-in
bar
antenna
and
external
antenna
terminal
Intermediate
frequency
455
kHz
Sensitivity
Image
rejection
1-f
rejection
S/ N
ratio
Harmonic
distortion
48
dB/ m
built-in
antenna
20
µV,
external
antenna
60
dB
at
1000
kHz
46
dB at 1
000
kHz
50dB
0.8
%
Amplifier
Section
Dynamic
power
output
(IHF,
constant
power
supply
method}
100
watts
/ 8
ohms
145
watts
/ 4
ohms
Continuous
RMS
power
output
(less
than
0.2%
THD
)
at
1 kHz
40
+
40
watts
/ 8
ohms
50
+
50
watts
/ 4
ohms
Both
channels
driven
simultaneously
43
watts
/ 8
ohms
60
watts
/ 4
ohms
per
channel
operating
at
20
Hz -
20
kHz
30
+
30
watts
/ 8
ohms
Power
bandwidth
IHF
Harmonic
distortion
Both
channels
driven
simultaneously
15
Hz-
30
kHz
IM
distortion
Frequency
response
PHONG
AUX
1,
2,
TAPE
Input
sensitivity
and
AUX
1, 2
TAPE
REC
/
PB
(input)
PHONG
Less
than
0.2% at
rated
output
Less
than
0.1%
at
1 W
output
Less
than
0.2% at all
power
level
RIAA
equalization
curve
±
0.5
dB
10
Hz-
60
kHz~ ~ dB
impedance
(with
rated
output)
Sensitivity
Impedance
140
mV
100kohms
140
mV
100
k
ohms
140
mV
100kohms
1.8
mV
47kohms
Output
voltage
and
impedance
Level
Impedance
REC
OUT
250mV
10
k
ohms
REC
/
PB
(output)
30
mV
80
k
ohms
HEADPHONE
Accepts
all
low
and
high
impedance
headphones
SPEAKER
Accepts
4 - 1
6
ohm
speakers
S/ N
ratio
Weighting
network
Input
level
PHONG
Better
than
70
dB B 1.8
mV
TAPE,
AUX
1, 2
REC
/
PB
(input)
Better
than
90
dB A
140
mV
Better
than
90
dB A
140
mV
Damping
factor
60
/ 8
ohms
Tone
controls
BASS
(dual
concentric
knob)
1
00
Hz±
10
dB
TREBLE (dual
concentric
knob)
10
kHz+
10
dB
High
filter
6 dB/
act
above
5 kHz
Loudness
control
50
Hz+ 10 dB
General
System
Semiconductor
complement
Power
requirements
Power
consumption
Ac
outlet
Dimensions
Weight
Supplied
Accessories
10
kHz+ 4 dB (att. -
30
dB)
Fm
stereo
/
fm-am
superheterodyne
3 FET
plus
35
transistors
for
reception
2 FET
plus
16
transistors
for
auxiliary
circuit
53
diodes
11
7 V,
60
Hz ac
160
watts
Unswitched
,
500
W
17
¾
(W)
x 5
9,;;
(H) x
13
,¾
(D)inches
26
lb
7 oz (net)
35
lb
5 oz (in
shipping
carton)
Ribbon
antenna,
Binaural
plug
,
Phono
plugs
(4),
Polishing
cloth
Oiled
Walnut
Cabinet
TAC-5E
(18
,¾
(W)
X
6½(H)
X
14(D)inches)
Optional
Accessory
Design
and
specifications
subject
to
change
without
notice.
1
1

www.SteamPoweredRadio.Com
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TUNER BLOCK
6 element solid state
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1
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stage
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Lge
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Muting
circuit
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t-----t---
FM
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low
pass
filter
t---+---
FM
(
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block
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MOOE
AM
A-m block
Tuning meter
d
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ON
/
OFF
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AUDIO
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AUX
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FUNCTION
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FM
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Power amplifier
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