Xerox 4540 Service Manual - Page 181

■ "Early-Production Slide Rail and CMA Information" on page G-1 (X4500) 8. Update the FRU information using servicetool. See Section 3.6, "Servicetool FRU Update Procedure" on page 3-8. ▼ To Remove Memory Modules (DIMMs) (CRU) This section describes how to remove and replace the server's dual inline memory modules (DIMMs). Note - This component is a CRU and can be replaced by anyone. Caution - DIMMs are extremely sensitive to electrostatic discharge (ESD). To avoid damaging them, use the following antistatic precautions: 1) Always wear an antistatic strap when handling DIMMs. 2) Handle DIMMs by the edges only. 3) Place DIMMs in antistatic containers for storage. 4) Place DIMMs on an antistatic mat when working with them. Note - For optimum performance, all DIMMs controlled by a given CPU should be the same capacity and all single-rank or dual-rank. Mixed configurations are supported, but could result in lower memory performance. Note that all supported 4GB and 8GB DIMMs are dual-rank. For 1GB and 2GB DIMMs, you can identify the type by counting the DRAMs; single-rank DIMMs have 18 DRAMs, while dual-rank DIMMs have 36 DRAMs. 1. Power off the server as described in Section 3.7.1, "Powering Off the Server" on page 3-10. 2. Remove the cable management arm as described in one of the following: ■ 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. Remove the system controller as described in "To Remove the System Controller (CRU)" on page 3-70. Chapter 3 Maintaining the Sun Fire X4500 and X4540 Servers 3-61