IBM 71453RU manual Working inside the server with the power on, Handling static-sensitive devices

vIf the server has redundant power, each of the power-supply bays has a power supply installed in it.

vThere is adequate space around the server to allow the server cooling system to work properly. Leave approximately 50 mm (2.0 in.) of open space around the front and rear of the server. Do not place objects in front of the fans. For proper cooling and airflow, replace the top cover before you turn on the server. Operating the server for extended periods of time (more than 30 minutes) with the top cover removed might damage server components.

vYou have followed the cabling instructions that come with optional adapters.

vYou have replaced a failed fan within 48 hours.

vYou have replaced a hot-swap drive within 2 minutes of removal.

vFor redundant and hot-swappable power supply operation, the power supplies are connected to 200 - 240 V ac.

vMicroprocessor sockets 1 - 4 each always contain either a heat-sink blank or a microprocessor and heat sink.

Working inside the server with the power on

Attention: Static electricity that is released to internal server components when the server is powered on might cause the server to halt, which might result in the loss of data. To avoid this potential problem, always use an electrostatic-discharge wrist strap or other grounding system when you work inside the server with the power on.

The server supports hot-swap devices and is designed to operate safely while it is turned on and the cover is removed. Follow these guidelines when you work inside a server that is turned on:

vAvoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts before you work inside the server; do not wear cuff links while you are working inside the server.

vDo not allow your necktie or scarf to hang inside the server.

vRemove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist watches.

vRemove items from your shirt pocket, such as pens and pencils, that might fall into the server as you lean over it.

vAvoid dropping any metallic objects, such as paper clips, hairpins, and screws, into the server.

Handling static-sensitive devices

Attention: Static electricity can damage the server and other electronic devices. To avoid damage, keep static-sensitive devices in their static-protective packages until you are ready to install them.

To reduce the possibility of damage from electrostatic discharge, observe the following precautions:

vLimit your movement. Movement can cause static electricity to build up around you.

vWear an electrostatic-discharge wrist strap, if one is available.

vHandle the device carefully, holding it by its edges or its frame.

vDo not touch solder joints, pins, or exposed circuitry.

40IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Installation and User's Guide