Safety Instructions - Akai S1100 Service Manual

SAFETY INSTRUCTIONS
PRECAUTIONS DURING
SERVICING
1.
Parts indentified
by the
A
(*)
symbols
are
critical
for
safety
Replace only with parts
number
specified.
2. In
addition
to safety,
other parts
and assemblies are
specified
forconformance
with
such
regulations
as
those applying
to
spurious
radiation.
These must
also
be replaced only with specified
re-
placements.
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
turtable)
5.
When
replacing
AC
primary side components(transfor-
mers, power
cords, noise blocking capacitors,
etc.),
wrap ends
of
wires securely about
the terminals be-
fore soldering.
6.
Observe
that
wires do
not contact
heat producing
parts (heatsinks,
oxide metal
film resistors, fusible re-
sistors,
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.
SAFETY CHECK AFTER
SERVICING
After servicing,
make
measurements
of
leakage-current
or resistance
in
order
to
determine
that
exposed
parts
are acceptably
insulated
from
the
supply
circuit.
The
leakage-current
measurement
should be
done
be-
tween
accessible metal parts
(such as
chassis,
ground
terminal,
microphone
jacks, signal
input/output
connec-
tors,
etc.)
and
the earth
ground through a
resister of
1500ohms
paralleled with
a
0.15
\if
capacitor,
under
the
unit's
normal working
condition.
The
leakage-current
should be
less
than
0.5
mA
rms AC.
The
resistance
measurement
should be
done between
accessible
exposed
metalparts
and
power
cord
plug
prongs
with the
power
switch
(if
included) "ON".
The
re-
sistance should be
more
than
2.2
Mohms.
INFORMATION
SYMBOLS FOR
PRIMARY
DESTINATION
Alphabet indicates the destination
of the units
as
listed
below.
Symbols
Principal
Destinations
A USA
B
UK
C Canada
E Europe (except UK)
1
J
Japan
S
\
Australia
V
W.
Germany
only
u
Universal
Area
Y*
Custom
version
SERVICE
MANUAL
2