Technics SH-8055 Service Manual

ACETEES
Mi
SAFETY
PRECAUTIONS
.
Before
servicing,
unplug
the
power
cord
to
prevent
an
electric
shock.
.
When
replacing
parts,
use
only
manufacturer’s
recommended
components
for
safety.
.
Check
the
condition
of
the
power
cord.
Replace
if
wear
or
damage
is
evident.
.
After
servicing,
be
sure
to
restore
the
lead
dress,
insulation
barriers,
insulation
papers,
shields,
etc.
.
Before
returning
the
serviced
equipment
to
the
customer,
be
sure
to
make
the
following
insulation
resistance
test
to
prevent
the
customer
from
being
exposed
to
a
shock
hazard.
ORWNS>
e RUE ATION RESISTANCE TEST
.
Unplug
the
power
cord
and-short
the
two
prongs
of
the
plug
with
a
jumper
wire.
iE Turn on the power switch.
3.
Measure.
the
resistance
value
with
ohmmeter
between
the
jumpered
AC
plug
and
each
exposed
metal
cabinet
part,
such
as
screwheads
antenna,
control
shafts,
handle
brackets,
etc.
Equipment
with
antenna
terminals
should
read
between
3MQ.
and
5.2MG&
to
all
exposed
parts.
(Fig.
A)
Equipment
without
antenna
terminals
should
read
approximately
infinity
to
all exposed
parts.
(Fig.
B)
Note:
Some
exposed
parts
may
be
isolated
from
the
chassis
by
design.
These
will
read
infinity.
Antenna
terminal
Exposed Exposed
metal metal
part part
Ohmmeter
Ohmmeter
(Fig.A) (Fig. B)
Resistance
=
3M2—5.2MQ
Resistance
=
Approx
0O
4,
lf
the
measurement
is
outside
the
specified
limits,
there
is
a
possibility
of
a
shock
hazard.
The
equipment
should
be
repaired
and
rechecked
before
it
is
returned
to
the
customer.
Mi
BLOCK
DIAGRAM
OF
FUNCTION
(display mode)
t inicnok For detail, refer to Block Diagram on page 28.
Line input ©
tapet
Tape deck 1 “playback” O——O
Tape deck 2 “playback” otee2t
Tape deck 1 ‘Rec out”
Equalizer
(mic attenuator)
—20dB OdB
Tape deck 2 ‘Rec out”
Line output O
(display mode)
Reh.
level)

Technics SH-8055 Specifications

General

Type	Graphic Equalizer
Control Range	±12 dB
Bands	10
Input Sensitivity	150 mV
Output Level	150 mV
Signal-to-Noise Ratio	106dB
Total harmonic distortion	0.005%
Dimensions	430 x 96 x 275 mm