HP A4500A VRM Replacement for the rp24xx DC-to-DC Converter Installation - Page 1
HP A4500A - VMEbus Single Board Computer 744 Motherboard Manual
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VRM Replacement for the rp24xx DC-to-DC Converter Installation This sheet contains instructions for replacement of the DC-to-DC Converters in the server. These new DC-to-DC Converter modules are installed when new processors are installed. The DC-to-DC Converters are replacements for the existing modules that should be returned HP. Special instructions concerning the DC-to-DC Converters are shipped in this upgrade kit. Read and understand the instructions before installing the DC-to-DC Converters. When you unpack the new DC-to-DC Converters, save the shipping carton and packing materials. The old DC-to-DC Converters must be removed from the server and should be returned to HP. Package the removed modules in the used packing materials and ship via ground transportation. Important Steps: • The DC-to-DC Converter modules and the system board are Electrostatic Discharge (ESD) sensitive and can be damaged during installation. Follow the instructions in the ESD kit to ensure proper ESD procedures are used. • Power is applied to server circuits even when the power switch is set to OFF. Disconnect the power source before removing DC-to-DC Converters from server connectors. • Please return the old DC-to-DC Converter modules to HP. Refer to: http://partpage.corp.hp.com/notes.asp?QRYSTR=NOTES&NTYPE= PRODUCT&NSUBITEM=A5571A for instructions and address. Procedure: Step 1. Turn off and disconnect power from the server. WARNING Dangerous voltages may be present if power is connected. For your protection, disconnect the server from the power source before proceeding. Step 2. Remove the top cover to allow access to the system board and internal components. Step 3. ESD precautions are important. Use the ESD wrist strap when touching server components. Step 4. Locate the master and slave DC-to-DC Converter modules to be removed. 5971-4258 Sep 2004