IBM 8248-L4T User manual

Power Systems
Voltage regulators for the 8248-L4T,
8408-E8D, or 9109-RMD


Power Systems
Voltage regulators for the 8248-L4T,
8408-E8D, or 9109-RMD


Note
Before using this information and the product it supports, read the information in “Safety notices” on page v, “Notices” on
page 75, the IBM Systems Safety Notices manual, G229-9054, and the IBM Environmental Notices and User Guide, Z125–5823.
This edition applies to IBM Power Systems servers that contain the POWER7 processor and to all associated
models.
© Copyright IBM Corporation 2013.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Safety notices .................................v
Voltage regulator modules for the 8248-L4T, 8408-E8D, or 9109-RMD .........1
Model 8248-L4T, 8408-E8D, or 9109-RMD voltage regulator modules.................1
Installing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator module ..........2
Removing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator module ..........5
Replacing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator module ..........8
Model 8248-L4T, 8408-E8D, or 9109-RMD memory voltage regulator module .............10
Removing the 8248-L4T, 8408-E8D, or 9109-RMD memory voltage regulator module ..........11
Replacing the 8248-L4T, 8408-E8D, or 9109-RMD memory voltage regulator module ..........15
Common procedures for installable features ........................18
Before you begin ................................18
Identifying a part ................................20
Control panel LEDs...............................20
Identifying a failing part in an AIX system or logical partition ................22
Locating a failing part in an AIX system or logical partition ................22
Activating the indicator light for the failing part ....................22
Deactivating the failing-part indicator light ......................22
Identifying a failing part in an IBM i system or logical partition ................23
Activating the failing-part indicator light ......................23
Deactivating the failing-part indicator light ......................23
Identifying a failing part in a Linux system or logical partition ................24
Locating a failing part in a Linux system or logical partition ................24
Finding the location code of a failing part in a Linux system or logical partition .........24
Activating the indicator light for the failing part ....................25
Deactivating the failing-part indicator light ......................25
Locating a failing part in a Virtual I/O Server system or logical partition.............25
Identifying a part by using the Virtual I/O Server ...................26
Starting the system or logical partition .........................26
Starting a system that is not managed by an HMC or an SDMC ................26
Starting a system or logical partition by using the HMC ..................28
Starting a system or virtual server by using the SDMC ...................28
Stopping a system or logical partition .........................28
Stopping a system that is not managed by an HMC or an SDMC ...............28
Stopping a system by using the HMC ........................30
Stopping a system by using the SDMC ........................30
Removing and replacing covers for the 8248-L4T, 8408-E8D, or 9109-RMD .............31
Removing the front cover from the 8248-L4T, 8408-E8D, or 9109-RMD ..............31
Installing the front cover on the 8248-L4T, 8408-E8D, or 9109-RMD ...............32
Placing the 8248-L4T, 8408-E8D, or 9109-RMD system into the service or operating position .......33
Placing the rack-mounted 8248-L4T, 8408-E8D, or 9109-RMD system into the service position ......33
Placing the rack-mounted 8248-L4T, 8408-E8D, or 9109-RMD system into the operating position .....34
Disconnecting the power cords from the 8248-L4T, 8408-E8D, or 9109-RMD .............36
Connecting the power cords to the 8248-L4T, 8408-E8D, or 9109-RMD ...............36
Installing a part by using the HMC ..........................37
Installing a part by using the SDMC ..........................38
Removing a part by using the HMC ..........................38
Removing a part by using the SDMC..........................38
Replacing a part by using the HMC ..........................39
Replacing a part by using the SDMC ..........................39
Verifying the installed part .............................40
Verifying an installed feature or replaced part in an AIX system or logical partition .........40
Verifying the installed part in an IBM i system or logical partition ...............42
Deactivating the failing-part indicator light ......................43
Verifying the installed part in a Linux system or logical partition ...............43
© Copyright IBM Corp. 2013 iii

Verifying an installed part by using stand-alone diagnostics .................43
Verifying the installed part by using the HMC......................45
Activating and deactivating LEDs by using the HMC ..................45
Viewing serviceable events by using the HMC.....................46
Verifying the installed part by using the SDMC .....................47
Activating and deactivating LEDs by using the SDMC ..................47
Viewing serviceable events by using the SDMC ....................48
Verifying an installed part or replaced part on a system or logical partition by using Virtual I/O Server tools 49
Verifying the installed part by using VIOS ......................49
Verify the replacement part by using VIOS ......................49
Verifying a repair ................................51
Verifying the repair in AIX ............................52
Verifying a repair by using an IBM i system or logical partition ................55
Verifying the repair in Linux ...........................57
Verifying the repair from the management console ....................57
Closing a service call ...............................58
Closing a service call by using AIX or Linux ......................63
Closing a service call by using Integrated Virtualization Manager ...............67
Activating and deactivating LEDs ...........................71
Deactivating a system attention LED or partition LED by using the management console .......72
Activating or deactivating an identify LED by using the management console ...........72
Deactivating a system attention LED or logical partition LED by using the Advanced System Management
Interface ..................................73
Activating or deactivating an identify LED by using the Advanced System Management Interface ....74
Notices ...................................75
Trademarks ...................................76
Electronic emission notices ..............................76
Class A Notices .................................76
Class B Notices .................................80
Terms and conditions ................................83
iv Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

Safety notices
Safety notices may be printed throughout this guide:
vDANGER notices call attention to a situation that is potentially lethal or extremely hazardous to
people.
vCAUTION notices call attention to a situation that is potentially hazardous to people because of some
existing condition.
vAttention notices call attention to the possibility of damage to a program, device, system, or data.
World Trade safety information
Several countries require the safety information contained in product publications to be presented in their
national languages. If this requirement applies to your country, safety information documentation is
included in the publications package (such as in printed documentation, on DVD, or as part of the
product) shipped with the product. The documentation contains the safety information in your national
language with references to the U.S. English source. Before using a U.S. English publication to install,
operate, or service this product, you must first become familiar with the related safety information
documentation. You should also refer to the safety information documentation any time you do not
clearly understand any safety information in the U.S. English publications.
Replacement or additional copies of safety information documentation can be obtained by calling the IBM
Hotline at 1-800-300-8751.
German safety information
Das Produkt ist nicht für den Einsatz an Bildschirmarbeitsplätzen im Sinne§2der
Bildschirmarbeitsverordnung geeignet.
Laser safety information
IBM®servers can use I/O cards or features that are fiber-optic based and that utilize lasers or LEDs.
Laser compliance
IBM servers may be installed inside or outside of an IT equipment rack.
© Copyright IBM Corp. 2013 v

DANGER
When working on or around the system, observe the following precautions:
Electrical voltage and current from power, telephone, and communication cables are hazardous. To
avoid a shock hazard:
vConnect power to this unit only with the IBM provided power cord. Do not use the IBM
provided power cord for any other product.
vDo not open or service any power supply assembly.
vDo not connect or disconnect any cables or perform installation, maintenance, or reconfiguration
of this product during an electrical storm.
vThe product might be equipped with multiple power cords. To remove all hazardous voltages,
disconnect all power cords.
vConnect all power cords to a properly wired and grounded electrical outlet. Ensure that the outlet
supplies proper voltage and phase rotation according to the system rating plate.
vConnect any equipment that will be attached to this product to properly wired outlets.
vWhen possible, use one hand only to connect or disconnect signal cables.
vNever turn on any equipment when there is evidence of fire, water, or structural damage.
vDisconnect the attached power cords, telecommunications systems, networks, and modems before
you open the device covers, unless instructed otherwise in the installation and configuration
procedures.
vConnect and disconnect cables as described in the following procedures when installing, moving,
or opening covers on this product or attached devices.
To Disconnect:
1. Turn off everything (unless instructed otherwise).
2. Remove the power cords from the outlets.
3. Remove the signal cables from the connectors.
4. Remove all cables from the devices.
To Connect:
1. Turn off everything (unless instructed otherwise).
2. Attach all cables to the devices.
3. Attach the signal cables to the connectors.
4. Attach the power cords to the outlets.
5. Turn on the devices.
(D005)
DANGER
vi Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

Observe the following precautions when working on or around your IT rack system:
vHeavy equipment–personal injury or equipment damage might result if mishandled.
vAlways lower the leveling pads on the rack cabinet.
vAlways install stabilizer brackets on the rack cabinet.
vTo avoid hazardous conditions due to uneven mechanical loading, always install the heaviest
devices in the bottom of the rack cabinet. Always install servers and optional devices starting
from the bottom of the rack cabinet.
vRack-mounted devices are not to be used as shelves or work spaces. Do not place objects on top
of rack-mounted devices.
vEach rack cabinet might have more than one power cord. Be sure to disconnect all power cords in
the rack cabinet when directed to disconnect power during servicing.
vConnect all devices installed in a rack cabinet to power devices installed in the same rack
cabinet. Do not plug a power cord from a device installed in one rack cabinet into a power
device installed in a different rack cabinet.
vAn electrical outlet that is not correctly wired could place hazardous voltage on the metal parts of
the system or the devices that attach to the system. It is the responsibility of the customer to
ensure that the outlet is correctly wired and grounded to prevent an electrical shock.
CAUTION
vDo not install a unit in a rack where the internal rack ambient temperatures will exceed the
manufacturer's recommended ambient temperature for all your rack-mounted devices.
vDo not install a unit in a rack where the air flow is compromised. Ensure that air flow is not
blocked or reduced on any side, front, or back of a unit used for air flow through the unit.
vConsideration should be given to the connection of the equipment to the supply circuit so that
overloading of the circuits does not compromise the supply wiring or overcurrent protection. To
provide the correct power connection to a rack, refer to the rating labels located on the
equipment in the rack to determine the total power requirement of the supply circuit.
v(For sliding drawers.) Do not pull out or install any drawer or feature if the rack stabilizer brackets
are not attached to the rack. Do not pull out more than one drawer at a time. The rack might
become unstable if you pull out more than one drawer at a time.
v(For fixed drawers.) This drawer is a fixed drawer and must not be moved for servicing unless
specified by the manufacturer. Attempting to move the drawer partially or completely out of the
rack might cause the rack to become unstable or cause the drawer to fall out of the rack.
(R001)
Safety notices vii

CAUTION:
Removing components from the upper positions in the rack cabinet improves rack stability during
relocation. Follow these general guidelines whenever you relocate a populated rack cabinet within a
room or building:
vReduce the weight of the rack cabinet by removing equipment starting at the top of the rack
cabinet. When possible, restore the rack cabinet to the configuration of the rack cabinet as you
received it. If this configuration is not known, you must observe the following precautions:
– Remove all devices in the 32U position and above.
– Ensure that the heaviest devices are installed in the bottom of the rack cabinet.
– Ensure that there are no empty U-levels between devices installed in the rack cabinet below the
32U level.
vIf the rack cabinet you are relocating is part of a suite of rack cabinets, detach the rack cabinet from
the suite.
vInspect the route that you plan to take to eliminate potential hazards.
vVerify that the route that you choose can support the weight of the loaded rack cabinet. Refer to the
documentation that comes with your rack cabinet for the weight of a loaded rack cabinet.
vVerify that all door openings are at least 760 x 230 mm (30 x 80 in.).
vEnsure that all devices, shelves, drawers, doors, and cables are secure.
vEnsure that the four leveling pads are raised to their highest position.
vEnsure that there is no stabilizer bracket installed on the rack cabinet during movement.
vDo not use a ramp inclined at more than 10 degrees.
vWhen the rack cabinet is in the new location, complete the following steps:
– Lower the four leveling pads.
– Install stabilizer brackets on the rack cabinet.
– If you removed any devices from the rack cabinet, repopulate the rack cabinet from the lowest
position to the highest position.
vIf a long-distance relocation is required, restore the rack cabinet to the configuration of the rack
cabinet as you received it. Pack the rack cabinet in the original packaging material, or equivalent.
Also lower the leveling pads to raise the casters off of the pallet and bolt the rack cabinet to the
pallet.
(R002)
(L001)
(L002)
viii Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

(L003)
or
All lasers are certified in the U.S. to conform to the requirements of DHHS 21 CFR Subchapter J for class
1 laser products. Outside the U.S., they are certified to be in compliance with IEC 60825 as a class 1 laser
product. Consult the label on each part for laser certification numbers and approval information.
CAUTION:
This product might contain one or more of the following devices: CD-ROM drive, DVD-ROM drive,
DVD-RAM drive, or laser module, which are Class 1 laser products. Note the following information:
vDo not remove the covers. Removing the covers of the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
vUse of the controls or adjustments or performance of procedures other than those specified herein
might result in hazardous radiation exposure.
(C026)
Safety notices ix

CAUTION:
Data processing environments can contain equipment transmitting on system links with laser modules
that operate at greater than Class 1 power levels. For this reason, never look into the end of an optical
fiber cable or open receptacle. (C027)
CAUTION:
This product contains a Class 1M laser. Do not view directly with optical instruments. (C028)
CAUTION:
Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following
information: laser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam. (C030)
CAUTION:
The battery contains lithium. To avoid possible explosion, do not burn or charge the battery.
Do Not:
v___ Throw or immerse into water
v___ Heat to more than 100°C (212°F)
v___ Repair or disassemble
Exchange only with the IBM-approved part. Recycle or discard the battery as instructed by local
regulations. In the United States, IBM has a process for the collection of this battery. For information,
call 1-800-426-4333. Have the IBM part number for the battery unit available when you call. (C003)
Power and cabling information for NEBS (Network Equipment-Building System)
GR-1089-CORE
The following comments apply to the IBM servers that have been designated as conforming to NEBS
(Network Equipment-Building System) GR-1089-CORE:
The equipment is suitable for installation in the following:
vNetwork telecommunications facilities
vLocations where the NEC (National Electrical Code) applies
The intrabuilding ports of this equipment are suitable for connection to intrabuilding or unexposed
wiring or cabling only. The intrabuilding ports of this equipment must not be metallically connected to the
interfaces that connect to the OSP (outside plant) or its wiring. These interfaces are designed for use as
intrabuilding interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE) and require isolation
from the exposed OSP cabling. The addition of primary protectors is not sufficient protection to connect
these interfaces metallically to OSP wiring.
Note: All Ethernet cables must be shielded and grounded at both ends.
The ac-powered system does not require the use of an external surge protection device (SPD).
The dc-powered system employs an isolated DC return (DC-I) design. The DC battery return terminal
shall not be connected to the chassis or frame ground.
xPower Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

Voltage regulator modules for the 8248-L4T, 8408-E8D, or
9109-RMD
Learn how to remove or replace a voltage regulator module for the IBM PowerLinux™7R4 (8248-L4T),
the IBM Power®750 (8408-E8D), and the IBM Power 760 (9109-RMD) servers.
Replacing this feature is a customer task. You can perform this task yourself or contact a service provider
to perform the task for you. You might be charged a fee by the service provider for this service.
DANGER
When working on or around the system, observe the following precautions:
Electrical voltage and current from power, telephone, and communication cables are hazardous. To
avoid a shock hazard:
vConnect power to this unit only with the IBM provided power cord. Do not use the IBM
provided power cord for any other product.
vDo not open or service any power supply assembly.
vDo not connect or disconnect any cables or perform installation, maintenance, or reconfiguration
of this product during an electrical storm.
vThe product might be equipped with multiple power cords. To remove all hazardous voltages,
disconnect all power cords.
vConnect all power cords to a properly wired and grounded electrical outlet. Ensure that the outlet
supplies proper voltage and phase rotation according to the system rating plate.
vConnect any equipment that will be attached to this product to properly wired outlets.
vWhen possible, use one hand only to connect or disconnect signal cables.
vNever turn on any equipment when there is evidence of fire, water, or structural damage.
vDisconnect the attached power cords, telecommunications systems, networks, and modems before
you open the device covers, unless instructed otherwise in the installation and configuration
procedures.
vConnect and disconnect cables as described in the following procedures when installing, moving,
or opening covers on this product or attached devices.
To Disconnect:
1. Turn off everything (unless instructed otherwise).
2. Remove the power cords from the outlets.
3. Remove the signal cables from the connectors.
4. Remove all cables from the devices.
To Connect:
1. Turn off everything (unless instructed otherwise).
2. Attach all cables to the devices.
3. Attach the signal cables to the connectors.
4. Attach the power cords to the outlets.
5. Turn on the devices.
(D005)
Model 8248-L4T, 8408-E8D, or 9109-RMD voltage regulator modules
Learn how to remove and replace a voltage regulator module in an IBM server.
© Copyright IBM Corp. 2013 1

Installing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage
regulator module
Use this procedure to install a new or an upgraded processor voltage regulator module.
Attention: If you are servicing a failing part, see the service procedures for “Removing the 8248-L4T,
8408-E8D, or 9109-RMD processor voltage regulator module” on page 5 and “Replacing the 8248-L4T,
8408-E8D, or 9109-RMD processor voltage regulator module” on page 8. The following installation
procedure is intended for installing a new or upgraded voltage regulator module.
Before installing or replacing a feature, ensure that the software required to support the feature is
installed on your system. For information about software prerequisites, see IBM Prerequisite
(http://www-912.ibm.com/e_dir/eServerPrereq.nsf). If the required software is not installed, see the
following websites to download and then install the software before continuing:
vTo download firmware and software updates and fixes, see Fix Central (http://www.ibm.com/
support/fixcentral).
vTo download Hardware Management Console (HMC) updates and fixes, see Hardware Management
Console Support and downloads (http://www14.software.ibm.com/webapp/set2/sas/f/hmcl/
home.html).
If your system is managed by the HMC, use the HMC to install the processor voltage regulator module
in the server. For instructions, see Installing a part by using the Hardware Management Console.
If you do not have an HMC, complete the following steps to install a voltage regulator module:
1. Identify the system that you will be working on and turn on the system locate (blue) indicator. For
instructions, see Enabling enclosure indicators and Control panel LEDs.
2. Use the service indicator light-emitting diodes (LEDs) to help identify the part. For instructions, see
Identifying a part.
3. Complete the prerequisite tasks. For instructions, see “Before you begin” on page 18.
Figure 1. Voltage regulator modules
2Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

4. Stop the system. For instructions, see “Stopping a system or logical partition” on page 28.
5. Disconnect the power source from the system by unplugging the system. For instructions, see
Disconnecting the power cords.
Note: This system might be equipped with a second power supply. Before continuing with this
procedure, ensure that the power source to the system has been completely disconnected.
(L003)
or
6. Open the front rack door.
7. Remove the front cover. For instructions, see Removing the front cover from the 8248-L4T, 8408-E8D,
or 9109-RMD.
8. Place the system into the service position. For instructions, see Placing a rack-mounted model into
the service position.
9. Attach the wrist strap.
Attention:
vAttach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic
discharge (ESD) from damaging your hardware.
vWhen using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control.
It does not increase or decrease your risk of receiving electric shock when using or working on
electrical equipment.
vIf you do not have a wrist strap, just prior to removing the product from ESD packaging and
installing or replacing hardware, touch an unpainted metal surface of the system for a minimum
of 5 seconds.
10. Press the push button on the planar to turn on the processor voltage regulator rollup LEDs to
identify the slot locations.
Voltage regulator modules 3

11. Remove the voltage regulator module from its antistatic package.
12. Install the voltage regulator module by performing the following steps:
a. Ensure that the connector tabs (A) are pushed out to the unlocked position before you install a
new voltage regulator module. See the following figure.
b. Carefully grasp the voltage regulator module along two edges and align it with the connector.
c. Insert and secure the voltage regulator module into the connector by pushing in the connector
tabs (A).
Figure 2. Push button on the planar
4Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

13. Place the system into the operating position. For instructions, see Placing the rack-mounted
8248-L4T, 8408-E8D, or 9109-RMD system into the operating position.
14. Replace the front cover. For instructions, see Installing the front cover on the 8248-L4T, 8408-E8D, or
9109-RMD.
15. Reconnect all power and signal cables to their respective connectors.
16. Close the rear rack door or the rear system door.
17. Start the system. For instructions, see Starting the system or logical partition.
18. Verify the installed part:
vIf you replaced the part because of a failure, verify the installed part as described in Verifying a
repair.
vIf you installed the part for any other reason, verify the installed part as described in Verifying the
installed part.
Removing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage
regulator module
Use this procedure to remove a processor voltage regulator module.
Attention: If you are removing a voltage regulator module to install a new or upgraded voltage
regulator module, see “Installing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator
module” on page 2. If you are removing a voltage regulator module as part of a service procedure,
continue to use the following procedure.
If your system is managed by the Hardware Management Console (HMC), use the HMC to remove a
processor voltage regulator module from the server. For instructions, see Removing a part by using the
Hardware Management Console.
If you do not have an HMC, complete the following steps to remove a processor voltage regulator
module:
Voltage regulator modules 5

1. Identify the system that you will be working on and turn on the system locate (blue) indicator. For
instructions, see Enabling enclosure indicators and Control panel LEDs.
2. Use the service indicator light-emitting diodes (LEDs) to help identify the part. For instructions, see
Identifying a part.
3. Complete the prerequisite tasks. For instructions, see “Before you begin” on page 18.
4. Stop the system. For instructions, see “Stopping a system or logical partition” on page 28.
5. Disconnect the power source from the system by unplugging the system. For instructions, see
Disconnecting the power cords.
Note: This system might be equipped with a second power supply. Before continuing with this
procedure, ensure that the power source to the system has been completely disconnected.
(L003)
or
6. Remove the front cover. For instructions, see Removing the front cover from the 8248-L4T, 8408-E8D,
or 9109-RMD.
7. Place the system into the service position. For instructions, see Placing a rack-mounted model into
the service position.
8. Attach the wrist strap.
6Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD

Attention:
vAttach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic
discharge (ESD) from damaging your hardware.
vWhen using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control.
It does not increase or decrease your risk of receiving electric shock when using or working on
electrical equipment.
vIf you do not have a wrist strap, just prior to removing the product from ESD packaging and
installing or replacing hardware, touch an unpainted metal surface of the system for a minimum
of 5 seconds.
9. Press the push button on the planar to turn on the processor voltage regulator rollup LEDs to
identify the slot locations.
10. Complete the following steps to remove a voltage regulator module from the system processor
assembly:
a. Pull the connector tabs (A) up and then out, as shown in the following figure.
b. Pull the voltage regulator module out of the connector.
Figure 3. Push button on the planar
Voltage regulator modules 7

11. Place the voltage regulator module on an electrostatic discharge (ESD) surface.
If you removed the voltage regulator module as part of another service procedure, continue with that
procedure. To replace the voltage regulator module or to install a new voltage regulator module, see the
following topics:
vReplacing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator module.
vInstalling the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator module.
Replacing the 8248-L4T, 8408-E8D, or 9109-RMD processor voltage
regulator module
Use this procedure to replace a processor voltage regulator module.
Attention: If you are installing a new or upgraded voltage regulator module, see “Installing the
8248-L4T, 8408-E8D, or 9109-RMD processor voltage regulator module” on page 2. If you are removing a
voltage regulator module as part of a service procedure, see “Removing the 8248-L4T, 8408-E8D, or
9109-RMD processor voltage regulator module” on page 5 and then continue to use the following
procedure.
If your system is managed by the Hardware Management Console (HMC), you can use the HMC to
replace a processor voltage regulator module. For instructions, see Replacing a part by using the
Hardware Management Console.
If you do not have an HMC, complete the following steps to replace a processor voltage regulator
module:
1. Remove the voltage regulator module from the antistatic package.
2. Press the push button on the planar to turn on the processor voltage regulator rollup LEDs to identify
the slot locations.
8Power Systems: Voltage regulators for the 8248-L4T, 8408-E8D, or 9109-RMD