Panasonic UF-5500, Service Manual

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5
UF-5500 / 4500
1 Safety Precautions
1. Before servicing, turn off the Power Switch, and unplug the AC power cord to prevent an electric shock.
2. When replacing parts, use only the manufacturer's recommended components.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore all the grounding connections,harness and lead wires, insulation barriers, insulation papers,
shields, etc.
5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent
the customer from being exposed to shock hazards.
1.1. For Service Technicians
• Repair service shall be provided in accordance with the service manual in order to prevent fires, injury or electric
shock, which can be caused by improper repair work.
1. When repair services are provided, the product or its components shall not be altered or modified from the original design.
2. If a lead wire assembly is supplied as a repair part, it must be replaced as part of the repair.
3. FASTON terminals shall be plugged straight in and unplugged straight out.
• ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover all your plastic parts boxes with aluminum foil to prevent static electricity.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch the IC or LSI pins with bare fingers.
1.2. AC Caution
For safety, before closing the lower cabinet, please make sure of the following precautions.
1. The “ground” lead is fixed with the screw.
2. The AC connector is connected properly.
Screw
Terminal of Harness
Washer
Plate Cover SMPS