3-28 Sun Fire V20z and Sun Fire V40z Servers—User Guide • March 2005
Caution – Ensure that the fan airflow direction is correct (front to rear) by installing
the fan so that the airflow direction arrow points towards the rear of the chassis.
After installing a new fan, allow sufficient time for the system to recognize the fan
and to determine whether it is functioning properly.
6. Before re-installing the cover on the server, check the routing of all cables for
obstructions.
3.5.9 Memory Voltage-Regulator Modules
The following procedure describes how to replace a memory voltage-regulator
module (VRM).
Caution – The Registered DDR 400 memory DIMMS can only be used in the second
updated release (chassis part number [PN] 380-1194) of the Sun Fire V20z server.
If you are installing the new Registered DDR 400 memory DIMMs in your server,
you must also install the new 2.6V voltage-regulator module (VRM) (PN 370-7747).
1. Power off the server, including any attached peripherals, and disconnect the
server from the electrical outlet.
Refer to “Powering Off the Server and Removing the Cover” on page 3-2.
2. Identify the memory VRM that must be replaced.
The memory VRM is in the outer slot, furthest from the CPU.
3. Remove a memory VRM by pressing down on the ejector bars at both ends of the
socket (see
FIGURE 3-24).
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