Scientific Atlanta Power Supply Unit manual Guidelines for Service Personnel, General

Guidelines for Service Personnel

General

The specific warnings and precautions in the sections below are applicable to service personnel.

Requirements for the Installation Site

You should select the installation site carefully. Observe the following rules:

￿￿Protective Earth

The protective earth lead of the building installation should comply with the national and local requirements.

￿￿Environmental Condition

Keep in mind that electronic equipment requires a dry and clean environment with proper ventilation and cooling facilities. High-humidity conditions can cause corrosion and degradation of electrical components. At all times the installation site should be dry, clean and ventilated. Temperature extremes can cause a variety of problems such as product failure, hardware damage, etc. Ensure that the product is operated in an environment that meets the requirements as stated in the unit’s technical specifications.

Electrical Shock Hazard

Electrical shock can cause personal injury or even death. At any time you must avoid direct contact with dangerous voltages. The protective earth connection is essential to safe operation and must be verified before connecting the power supply. You should know the following safety warnings and guidelines:

￿￿Dangerous Voltages

￿￿Product installation or replacement must be performed by service personnel only.

￿￿Only service personnel are allowed to remove chassis covers and access any of the components inside the chassis.

￿￿After service, assemble the unit and ensure it is safe to use before you put it back in operation.

￿￿Earthing

￿￿Do not violate the earth protection by using an extension cable, power cable or autotransformer without a protective earth conductor.

￿￿Take care to maintain the protective earthing of the unit during service or repair and to re-establish it before you put it back in operation.

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vi 6984278 Rev A