PREVENTIVE MAINTENANCE PROCEDURES This section covers tasks from Table 6-1 that require specific instructions or further explanation: • Checking signal, power and ground connections. • Cleaning printed circuit boards and edge connectors. Checking Connections Check all signal wiring, power and ground connections for the INOSM01 interface modules and termination units. When checking connections, always turn a screw, nut or other fastening device in the direction to tighten only. If the connection is loose, it will be tightened. If the connection is tight, the tightening action will verify that it is secure. There must not be any motion done to loosen the connection. NOTE: This preventive maintenance task should be performed while power to the cabinet is off. Check and verify module cable connections. Verify that all connections between interface modules, power connections, network cable connections and computer cable connections are secure.
