Working Inside The Server With The Power On; Handling Static-Sensitive Devices; Removing The Cover - IBM 4190 User Manual

Working inside the server with the power on

Attention:
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.
You might be instructed to turn on the server while the cover is off, to look at
system-board LEDs. Follow these guidelines when you work inside a server that is
turned on:
v Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts
v Do not allow your necktie or scarf to hang inside the server.
v Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist
v Remove items from your shirt pocket, such as pens and pencils, that could fall
v Avoid dropping any metallic objects, such as paper clips, hairpins, and screws,

Handling static-sensitive devices

Attention:
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:
v Limit your movement. Movement can cause static electricity to build up around
v The use of a grounding system is recommended. For example, wear an
v Handle the device carefully, holding it by its edges or its frame.
v Do not touch solder joints, pins, or exposed circuitry.
v Do not leave the device where others can handle and damage it.
v While the device is still in its static-protective package, touch it to an unpainted
v Remove the device from its package and install it directly into the server without
v Take additional care when you handle devices during cold weather. Heating

Removing the cover

To remove the cover, complete the following steps:
1. Read the safety information that begins on page v and "Installation guidelines"
22
IBM System x3250 M2 Types 4190 and 4194: User's Guide
Static electricity that is released to internal server components when
before working inside the server; do not wear cuff links while you are working
inside the server.
watches.
into the server as you lean over it.
into the server.
Static electricity can damage the server and other electronic devices.
you.
electrostatic-discharge wrist strap, if one is available.
metal part of the server for at least 2 seconds. This drains static electricity from
the package and from your body.
setting down the device. If it is necessary to set down the device, put it back into
its static-protective package. Do not place the device on the server cover or on a
metal surface.
reduces indoor humidity and increases static electricity.
on page 20.