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SA-AK633P
1 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
recommended components for safety.
3. Check the condition of the power cord. Replace if wear or
1.1.
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
screwheads, antenna, control shafts, handle brackets, etc.Measure the resistance value with ohmmeter between the jumper AC
plug and each exposed metal cabinet part, such as screwheads, antenna, control shafts, handle brackets, etc.
Equipment with antenna terminals should read between 2.7MΩ and 3.9MΩ to all exposed parts*. (Fig.1)
Equipment without antenna terminals should read approximately infinity to all exposed parts. (Fig.2)
*Note : Some exposed parts may be isolated from the chassis by design. These will read infinity.
4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be repaired
and re-checked before it is returned to the customer.
parts,
use
only
manufacturer's
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.
Fig.1
Fig.2
4
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