* SAFETY INSTRUCTIONS
PRECAUTIONS DURING SERVICING
1
. Parts indentified
by
the
&
(*)
symbol are critical for
safety. Replace
them
only with the parts number speci-
fied
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
re-
placements.
Examples:RF converters, tuner units, antenna selector
switches,
RF
cables, noise blocking capaci-
tors,
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 micro switch (especially
in
turntable)
5.
When replacing
AC
primary side components (trans-
formers, power cords,noise blocking capacitors, etc.),
wrap the ends
of
the
wires securely around the termi-
nals before soldering.
6. Make
sure that wires
do
not
contact heat producing
parts (heat sinks, oxide
metal
film
resistors, fusible
resistors, etc.).
* INFORMATION
SYMBOLS
FOR
PRIMARY DESTINATION
Alphabet indicates
the
destination
of
the
units
as
listed
below.
Symbols
Principal Destinations
IAI
U.S.A
---
[ID
U.K.
----
-----
[Q]
Canada
[EJ
Europe
(except
UK)
QJ
Japan
[ID
Australia
[Y]
Germany
[!I]
Universal
Area
;
[y:J
Custom
version
-
I
7.
Check that replaced wires
do
not
contact sharp
edged
or pointed parts.
8.
Also check areas surrounding repaired locations.
9.
Make
sure 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, microphonejacks, signal-input/output connec-
tors, etc.)
and
the
earth ground through a resistor
of
1500
ohms paralleled
with
a
0.15
µF
capacitor, under
the
unit's
normal working conditions.
The
leakage-current should
be
less than 0.5
mA
rms
AC.
The
resistance measurement should
be
done between
accessible exposed metal parts
and
power
cord
plug
prongs with
the
power switch
(if
included)
"ON".
The
resistance should
be
more
than
2.2
M
ohms.
MAKE YOUR CONTRIBUTION TO PRO-
TECT THE ENVIRONMENT
Used
batteries
with
the
ISO
symbol
for
re-
(Ji:t,,
cycling
as
well
as
small
accumulators
(re-
TI~
chargeable batteries), mini-batteries (cells)
'Q
and
starter batteries should
not
be
thrown
into
the
garbage
can.
Please leave
them
at
an
appropriate depot.
-------------------SERVICE
MANUAL------------------
2
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