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4. Safety Precaution
(This "Safety Precaution" is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer's recommended components for
safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation
papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the
following insulation resistance test to prevent the customer from being exposed
to a shock hazard.
Insulation Resistance Test
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with ohmmeter between the jumper AC plug and
each exposed metal cabinet part, such as screw heads, control shafts, handle
brackets, etc. Equipment with antenna terminals should read between 3M
5.2M
to all exposed parts.
read approximately infinity to all exposed parts.
*Note: Some exposed parts may be isolated from the chassis by design. These
will read infinity.
(Fig. A)
Equipment without antenna terminals should
(Fig. A)
6
(Fig. B)
and
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