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FX-33BK/FX-33LBK
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Safety Precautions
1. The design of this product contains special hardware,
5. Leakage current check
many circuits and components specially for safety pur-
poses.
For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer.
Replacement
parts must be identical to
those
used in the original circuits. Service should be
performed by qualified personnel only.
. Alterations
of the design or circuitry of the product
should not be made. Any design alterations or additions
will void the manufacturer's warranty and will further
relieve the manufacturer
of responsibility for personal
injury or property damage resulting therefrom.
. Many
electrical
and
mechanical
parts in the product
have special safety-related characteristics. These charac-
teristics are often not evident from visual inspection nor
can the protection
afforded
by them
necessarily
be
obtained
by using replacement
components
rated for
higher voltage, wattage,
etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified
by shading on the
schematics and by ( 4\ ) on the parts list in Service
manual. The use of a substitute replacement which does
not have the same safety characteristics as the recom-
mended
replacement
part shown
in the parts list in
Service manual may create shock, fire, or other hazards.
. The leads in the products are routed and dressed' with
ties, clamps, tubings, barriers and/or the like to be
separated from live parts, high temperature parts, moving
parts and/or sharp edges for the prevention of electric
shock and fire hazard.
When service is required, the original lead routing and
dress should be observed, and they should be confirmed
to be returned to normal, after re-assembling.
switch is located on the rear panel.
CHECKING
YOUR
LINE VOLTAGE
(For U.S. Military Market and Other Countries)
Before inserting the power plug, please check this setting to see that it corresponds
with the line voltage in your area. If it doesn't, be sure to adjust the voltage selector
swith
to the proper setting before operating this equipment.
The voltage selector
(Safety for electrical shock hazard)
After
re-assembling
the product,
always
perform
an
isolation
check
on
the
exposed
metal
parts of the
Products (antenna terminals, knobs, metal cabinet, screw
heads, headphone
jack, control shafts, etc.) to be sure
the product is safe to operate without danger of elec-
trical shock.
Do not use a line isolation transformer during this check.
@
Plug the AC
line cord directly into the AC outlet.
Using a ''Leakage Current Tester'', measure the leak-
age current
from
each exposed
metal
part of the
cabinet,
particularly any exposed metal part having
a return path to the chassis, to a Known good earth
ground. Any leakage current must not exceed 0.5 mA
AC (r.m.s.).
@
Alternate check method
Plug the AC
line cord directly into the AC outlet.
Use an AC voltmeter having 1,000 ohms per volt or
more sensitivity in the following manner.
Connect a
1500 {2 10 W resistor paralleled by a 0.15 wF AC-type
Capacitor between an exposed metal partand a known
good earth ground.
Measure the AC voltage across the resistor with the
AC voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed
metal
part having a
return path to the chassis, and measure the AC volt-
age across the resistor. Now, reverse the plug in the
AC outlet and repeat each measurement, Any voltage
measured
must not exceed 0.75 V AC ([r.m.s.). This
corresponds to 0.5 mA AC (r.m.s.).
AC VOLTMET ER
(HAVING 11000 2Q/V,
OR MORE SENSITIVITY)
0.15 wF AC-TYPE
ON EACH
EXPOSED
METALPART.
GOOD EARTH GROUND
Fig. 1
LINE VOLTS %U
110 ee
pea 0-240V
®
D _|
®
CAUTION: Before selecting the 'Voltage selector switch'' to proper voltage, disconnect
the power plug.
1-2 (No.2 877)
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