IBM 6385, User Manual

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Removing a system-board tray from a 2U chassis
Notes:
1. If two system-board trays are installed in the chassis, they can be removed
independently of each other.
2. If an expansion enclosure is installed on the system-board tray, you will remove
the expansion enclosure and the system-board tray from the chassis as one
assembly.
Attention: When two system-board trays are installed in the chassis, do not
operate the upper system-board tray with the lower system-board tray removed or
powered off, except for servicing. When the lower system-board tray is removed or
powered-off, chassis-level system-management information is not available. For
example, chassis fan speeds and temperatures may be returned as zero values. In
this situation, the chassis will continue to operate normally, since the power supply
and fans are designed to operate independently.
To remove a system-board tray from a 2U chassis, complete the following steps:
1. Read the safety information that begins on page v and “Installation guidelines”
on page 23.
2. Turn off the system-board tray and all attached devices (see “Turning off the
system-board tray” on page 22).
3. If external cables are connected to the front of the system-board tray or
expansion enclosure, note where they are connected; then, remove them.
4. Press in on the two release handles, pull the system-board tray and expansion
enclosure, if one is attached, out of the 2U chassis, and set it on a flat,
static-protective surface.
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IBM dx340 User’s Guide