Akai AX80 Service Manual page 3

SAFETY INSTRUCTIONS
SAFETY CHECK AFTER
SERVICING
Confirm
the specified insulation
resistance
between power cord plug prongs and
externally
exposed
parts
of
the
set
is
greater
than
lOMohms,
but
for
equipment
with
external
antenna terminals (tuner,
receiver, etc.)
and
is
intended
for
[Cl
or [aI, specified insulation resistance
should be
more
than
2.2
Mohms
(ground terminals,
microphone
jacks,
headphone
jacks, line-in -out
jacks
etc.)
PRECAUTIONS DURING SERVICING
1.
Parts identified
by
the
A
symbol
parts are
critical
for safety.
Replace only with
parts
number
specified.
2.
In addition to safety,
other
parts
and assemblies are specified for
conformance with such
regulations as
those
applying to spurious
radiation.
These
must
also
be replaced
only with
specified
replacements.
Examples:
RF
.converters,
tuner
units,
antenna selector switches,
RF
cables, noise
blocking capacitors, noise
blocking
filters, etc.
3.
Use
specified internal wiring.
Note
especially
1)
Wires covered with
PVC
tubing
2)
Double
insulated wires
3)
High
voltage leads
4.
Use specified insulating materials for
hazardous
live
parts.
Note
especially:
1
)
Insulation
Tape
2)
PVC
tubing
3)
Spacers (Insulating Barriers)
4)
Insulation sheets for transistors
5)
Plastic
screws
for fixing
microswitch
(especially in
turntable)
5.
When
replacing
AC
primary
side
components
(transformers,
power
cords, noise
blocking capacitors,
etc.),
wrap
ends of
wires securely
about the terminals before soldering.
6.
Observe that wires
do not contact heat producing
parts (heatsinks,
oxide metal
film resistors,
fusible resistors, etc.).
7
.
Check
that replaced wires
do
not contact sharp edged or
pointed
parts.
8.
Also check
areas
surrounding
repaired locations.
9.
Use
care that foreign objects (screws, solder droplets, etc.)
do not remain
inside the
set.
Voltage conversion
Models
for
Canada,
USA,
and Japan
are not
equipped with
this
facillity.
Each machine
is
preset
at
the factory
according
to
its
des-
tination,
but
some machines can be
set to
1
10V, 120V,
220V
or
240V
as required.
If
your machine's voltage
can be
converted:
Before conmnecting
the
power
cord, trun the
VOLTAGE
SELEC-
TOR
located
on
the
bottom
panel with a screwdriver until the cor-
rect
voltage
is
indicated.
2
SERVICE
MANUAL
AX80