– Blowers and fans– Motor generatorsand similar units. (This practice ensures correctgrounding of the units.)v If an electrical accident occurs:– Use caution; do not become a victim yourself.– Switch off power.– Send another person to get medical aid.Safety inspection guideThe intent of this inspection guide is to assist you inidentifying potentially unsafe conditions on these products.Each machine, as it was designed and built, had requiredsafety items installed to protect users and servicepersonnel from injury. This guide addresses only thoseitems. However, good judgment should be used to identifypotential safety hazards due to attachment of non-IBMfeatures or options not covered by this inspection guide.If any unsafe conditions are present, you must determinehow serious the apparent hazard could be and whetheryou can continue without first correcting the problem.Consider these conditions and the safety hazards theypresent:v Electrical hazards, especially primary power (primaryvoltage on the frame can cause serious or fatalelectrical shock).v Explosive hazards, such as a damaged CRT face orbulging capacitorv Mechanical hazards, such as loose or missing hardwareThe guide consists of a series of steps presented in achecklist. Begin the checks with the power off, and thepower cord disconnected.Checklist:1. Check exterior covers for damage (loose, broken, orsharp edges).2. Power-off the computer. Disconnect the power cord.3. Check the power cord for:a. A third-wire ground connector in good condition.Use a meter to measure third-wire groundcontinuity for 0.1 ohm or less between the externalground pin and frame ground.b. The power cord should be the appropriate type asspecified in the parts listings.c. Insulation must not be frayed or worn.128 Hardware Maintenance Manual: xSeries 200
