IBM BladeCenter S, Руководство по диагностике и обслуживанию

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– When you are working with powered-on electrical equipment, use only one
hand. Keep the other hand in your pocket or behind your back to avoid
creating a complete circuit that could cause an electrical shock.
– When using a tester, set the controls correctly and use the approved probe
leads and accessories for that tester.
– Stand on a suitable rubber mat to insulate you from grounds such as metal
floor strips and equipment frames.
v
Use extreme care when measuring high voltages.
v To ensure proper grounding of components such as power supplies, pumps,
blowers, fans, and motor generators, do not service these components outside of
their normal operating locations.
v
If an electrical accident occurs, use caution, turn off the power, and send another
person to get medical aid.
Inspecting for unsafe conditions
Use this information to help you identify potential unsafe conditions in an IBM
®
product that you are working on.
About this task
Each IBM product, as it was designed and manufactured, has required safety items
to protect users and service technicians from injury. The information in this section
addresses only those items. Use good judgment to identify potential unsafe
conditions that might be caused by non-IBM alterations or attachment of non-IBM
features or options that are not addressed in this section. If you identify an unsafe
condition, you must determine how serious the hazard is and whether you must
correct the problem before you work on the product.
Consider the following conditions and the safety hazards that they present:
v
Electrical hazards, especially primary power. Primary voltage on the frame can
cause serious or fatal electrical shock.
v Explosive hazards, such as a damaged CRT face or a bulging capacitor.
v
Mechanical hazards, such as loose or missing hardware.
To inspect the product for potential unsafe conditions, complete the following
steps:
1.
Make sure that the power is off and the power cords are disconnected.
2. Make sure that the exterior cover is not damaged, loose, or broken, and observe
any sharp edges.
3. Check the power cords:
v
Make sure that the third-wire ground connector is in good condition. Use a
meter to measure third-wire ground continuity for 0.1 ohm or less between
the external ground pin and the frame ground.
v
Make sure that the power cords are the correct type.
v
Make sure that the insulation is not frayed or worn.
4. Remove the cover.
5.
Check for any obvious non-IBM alterations. Use good judgment as to the safety
of any non-IBM alterations.
6. Check inside the computer for any obvious unsafe conditions, such as metal
filings, contamination, water or other liquid, or signs of fire or smoke damage.
Safety
vii