Safety Precaution - Panasonic SC-H M900 Service Manual

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SC-HM900
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Safety Precaution
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Before Servicing, unplug the power cord to prevent an electric shock.
When replacing parts, use only manufacture's recommended components for safety.
Check the condition of the power cardoReplace if wear or damage is evident.
After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
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.
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Insulation Resistance Test
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Unplug the power cord and short the two prongs of the plug with a jumper wire.
Turn on the power switch.
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 3MQ and 5.2MQ 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 designoThese will read infinity.
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If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be
repaired and rechecked before it is returned to the customer.
Exposed
metal,./'/
par!
Fig.1
Resistance == 3MO - 5.2MO
Exposed
metal/'
par!
Fig-:2
Resistance==
Approx 00
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