User Service Guide, Fifth Edition - HP Integrity rx8640 SEU

5 Removal and Replacement
This chapter provides a detailed description of the Support Expansion Unit (SEU) FRU removal
and replacement procedures.
The sections contained in this chapter are:
• “Electrostatic Discharge ”
• “Shutting Down nPartitions and Powering Off Hardware Components”
• “Removing and Replacing a DDS-4 or DVD Drive”
• “Removing and Replacing a Disk Drive”
• “Removing and Replacing a Standby/Main Fan (Front) Assembly”
• “Removing and Replacing a Standby/Main Fan (Rear) Assembly”
• “Removing and Replacing a Bulk Power Supply (BPS)”
• “Removing and Replacing a PCI Power Supply (Brick)”
Electrostatic Discharge
HP systems and peripherals contain assemblies and components that are sensitive to electrostatic
discharge (ESD). Carefully observe the precautions and recommended procedures in this manual
to prevent component damage from static electricity.
WARNING! Connect to ground with a wrist strap. Connection may be made to any grounded
metal assembly in the cabinet. Both you and the electronic devices must be grounded to avoid
static discharges that can cause damage.
Take these precautions:
• Prepare an ESD safe work surface large enough to accommodate the various assemblies
handled during the upgrade. Use a grounding mat and an anti-static wrist strap, such as
those included in the ESD Field Service Kit (A3024-80004).
• The anti-static bag cannot function as a static dissipating mat. Do not use the anti-static bag
for any other purpose than to enclose a product.
• Treat all assemblies, components, and interface connections as static-sensitive.
• When unpacking cards, interfaces, and other accessories that are packaged separately from
the system, keep the accessories in their conductive plastic bags, until they are ready to be
installed.
• Avoid working in carpeted areas, and keep body movement to a minimum while installing
accessories.
Shutting Down nPartitions and Powering Off Hardware Components
When you remove and replace hardware you may need to shut down one or more nPartitions
on the SEU. In some cases you also will need to power off hardware components as part of the
remove and replace procedure.
This section gives details on how to ensure that an nPartition is properly shut down, and it also
describes how to power off (and power on) hardware components.
Shutting Down an nPartition
This procedure is for checking the boot status of an nPartition and, if needed, shutting down
HP-UX on the nPartition.
1. Advise the customer that the system (one or more nPartitions) must be shut down for repairs.
Ensure that the customer has a current backup, and inform the customer of the anticipated
downtime.
Electrostatic Discharge 95