Xerox 4540 Service Manual - Page 190

5. Update the FRU information using servicetool. See Section 3.6, "Servicetool FRU Update Procedure" on page 3-8. ▼ To Remove the System Controller (CRU) The system controller consists of a sub-enclosure that can be removed from the back of the main system enclosure. The system controller contains the CPUs, memory, the service processor, and optional PCI cards. Caution - To prevent electrostatic discharge (ESD) damage to the components on the system controller, connect a ground strap between yourself and the chassis ground before proceeding. 1. Shut down the power from the front panel and then unplug both power supply cords. Caution - Although both power supplies should turn off then when you remove the system controller, voltage could be present on the chassis connectors if either power supply did not shut down as expected. Thus, you must pull the power cords from the power supplies to avoid any risk from inadvertent contact with those connectors. 2. Remove the CMA from the X4500 as described in one of the following: See one of the following docs depending on your CMA version: ■ Sun Fire X4500/X4540 Installation Guide ■ Sun X4500-J Slide Rail Installation Guide (X4500) ■ "Early-Production Slide Rail and CMA Information" on page G-1 (X4500) 3. Unscrew the captive screw on the system controller handle. 3-70 Sun Fire X4500/X4540 Server Service Manual • May 2010