Safety Precautions; Insulation Resistance Test - Panasonic BB-HGW700A Service Manual

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When replacing, the following precautions will help to prevent recurring

1. Cover the plastic parts with aluminum foil.

2. Ground the soldering irons.

3. Use a conductive mat on the work-table.

4. Do not grasp IC or LSI pins with bare fingers.

3. CAUTION

3.1. SAFETY PRECAUTIONS

1. Before servicing, unplug the power cord to prevent an electrical shock.

2. When replacing parts, use only manufacturer's recommended

components for safety.

3. Check the condition of 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, make the

following insulation resistance test to prevent a shock hazard.

1. Unplug the AC power cord and short the two prongs of the plug with a

jumper wire.

2. Measure the resistance value with ohmmeter between the jumpered AC

plug and each exposed metal cabinet part, such as screw threads, etc.

Note:

Some exposed parts may be isolated from the chassis by design. These will read infinity.

3. If the measurement is outside the specified limits, there is a possibility

of shock hazard. The equipment should be repaired and rechecked

before it is returned to the customer.

malfunctions.

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