TA-
AX311
SAFETY
CHECK-OUT
After
correcting
the
original
service
problem,
perform
the
following
safety
check
before
releasing
the
set
to
the
customer:
Check
the
antenna
terminals,
metal
trim,
“‘metallized”’
knobs,
screws,
and
all
other
exposed
metal
parts
for
AC
leakage.
Check
leakage
as
described
below.
LEAKAGE
TEST
The
AC
leakage
from
any
exposed
metal
part
to
earth
ground
and
from
all
exposed
metal
parts
to
any
exposed
metal
part
having
a
return
to
chassis,
must
not
exceed
0.5mA
(500
microampers).
Leakage
current
can
be
measured
by
any
one
of
three
methods.
1.
A
commercial
leakage
tester,
such
as
the
Simpson
229
or
RCA
WT-540A.
Follow
the
manufacturers’
instructions
to
use
these
instru-
ments.
2.
<A
battery-operated
AC
milliammeter.
The
Data
Precision
245
digital
multimeter
is
suitable
for
this
job.
3.
Measuring
the
voltage
drop
across
a
resistor
by
means
of
a
VOM
or
battery-operated
AC
volt-
meter.
The
“limit”
indication
is
0.75
V,
so
analog
meters
must
have
an
accurate
low-
voltage
scale.
The
Simpson
250
and
Sanwa
SH-63Trd
are
examples
of
a
passive
VOM
that
is
suitable.
Nearly
all
battery
operated
digital
multimeters
that
have
a
2V
AC
range
are
suitable.
(See
Fig.
A)
To
Exposed
Metal
Parts
on
Set
AC
0.15
uF
voltmeter
ae
(0.75
V)
=
Earth
Ground
Using
an
AC
voltmeter
to
check
AC
leakage.
TABLE
OF
CONTENTS
Section
Title
Page
SPECIFICATIONS
a
1
1.
GENERAL
eer
er
ere
ae
ee
3
2.
DIAGRAMS
.
2-1.
Description
on
IC101(
~PD75206-717-3BE)-::--
6
2-2.
Key
operation
ee
eee
ee
ee
ee
8
2-3.
Circuit
Boards
Location
-+++++++srstesssetteees
12
2-4,
Semiconductor
Lead
Layouts::+:+++srsrrserees
13
2-5.
Printed
Wiring
Boards:+:+++s+ssscsrectesreeess
14
2-6.
Schematic
Diagram
rer
ee
ee
ee
ee
19
2-7.
IC
Block
Diagrams
eee
eee
emcee
eee
ease
asenens
24
3.
EXPLODED
VIEWS
3-
1.
Overall
Section
1
eee
eee
ee
25
3
=
2.
Overall
Section
2
TERR
Reece
ee
ee
ee
ee)
26
4,
ELECTRICAL
PARTS
LIST
«++++000+0seeeeeeeeeeeeees
27
MODEL
IDENTIFICATION
—
Specification
Label
—
SONY.
INTEGRATED
STEREO
AMPLIFIER
UMMM
ttt
MODEL
NO,
TA-AX311
SERIAL
NO.
MADE
IN
JAPAN
US,
Canadian
models
:
AC
120V,
60Hz
200W
(U)
400VA
(CA)
Australian
model
:
AC
220V~50/60Hz
220W
E model
:
AC
120/220/240V~50/60Hz
220W
