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Removing and Replacing Parts: Dell PowerEdge 2550 Systems Service Manual
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Removing and Replacing Parts: Dell™ PowerEdge™ 2550
Systems Service Manual
This section provides troubleshooting procedures for components inside the system.
Before you start any of the procedures in this section, take the following steps:
- Perform the procedures described in “Checking Connections and Switches” and
“The System Setup Program” in “Checking the Basics” in the Installation
and Troubleshooting Guide.
- Read the safety instructions in “Safety First—For You
and Your Computer.”
You need the following items to perform the procedures in this section:
- The system’s User's Guide
- The Dell OpenManage Server Assistant CD and several blank,
formatted 3.5-inch diskettes. (If you cannot run the Dell Diagnostics from the utility
partition on your system’s hard-disk drive, you can create a set of diagnostics
diskettes using the Dell OpenManage Server Assistant CD. See your system’s User’s
Guide for additional information about using the Dell OpenManage Server Assistant
CD.)
- The key to the system keylock
The procedures in this guide require that you remove the cover and work inside the
system. While working inside the system, do not attempt to service the system except as
explained in this guide and elsewhere in Dell documentation. Always follow the
instructions closely.
 |
WARNING FOR YOUR PERSONAL SAFETY
AND PROTECTION OF THE EQUIPMENT Before
starting to work on the system, perform the following steps in the sequence listed:
- Turn off your system and any devices.
- Ground yourself by touching an unpainted metal surface on the
chassis, such as the metal around the card-slot openings at the back of the system, before
touching anything inside your system.
- While you work, periodically touch an unpainted metal surface on the
chassis to dissipate any static electricity that might harm internal components.
In addition, Dell recommends that you periodically review the safety
instructions in the System Information document provided with your system. |
The system has two doors on the top of the system that provide
access to the system board and expansion cards. The doors interlock so that the keylock on
the right-side door secures both doors.
Figure 1. Opening the System
Doors
To open the system top doors, perform the following steps.
 |
CAUTION: See the safety
instructions in your System Information booklet before working inside your
system.
|
- Slide the system out of the rack.
- Remove the optional front bezel (if present) if you need to access
the hard-disk drives.
- Using the system key, turn the keylock on the top of the chassis clockwise to the
unlocked position (see Figure 1).
- Slide the two door latches to release the right door.
- Lift the right door.
- Lift the left door.
To close the top doors, perform the following steps:
- Close the left door.
- Close the right door so that it overlaps the left door, and slide the finger latches
until they snap into the locked position.
- Rotate the system key counterclockwise in the keylock to lock the top doors (see Figure 1).
To remove the optional front bezel of the system, perform the
following steps.
|
CAUTION: See the safety
instructions in your System Information booklet before working inside your
system.
|
- Unlock and open the system doors (see "Opening the System
Doors").
- Pivot the top of the two locking levers toward the back of the chassis (see Figure 2).
- Press the tab on each end of the bezel and remove the bezel from the chassis (see Figure 2).
Figure 2. Optional Front
Bezel Removal
 |
| 1 |
Locking levers (2) |
| 2 |
Tabs (2) |
| 3 |
Status indicators (2) |
| 4 |
Dell nameplate |
|
|
NOTICE: When replacing the optional
front bezel, ensure that the bezel is oriented so that its status indicators are
positioned just below the Dell nameplate in the center of the bezel.
|
In Figure 3, the system doors are opened to provide an
interior view. Figure 3 also identifies the drive bays.
Refer to these illustrations to locate interior features and components discussed later in
this manual.
Figure 3. Inside the System (Right-Side View)
 |
| 1 |
Cooling fans (3) |
| 2 |
Expansion-card cage |
| 3 |
Microprocessors |
| 4 |
System board |
| 5 |
Optional redundant power supplies
(2) |
| 6 |
Power supply distribution board |
| 7 |
RAID battery (optional) |
| 8 |
Interposer board |
| 9 |
Diskette drive and CD-ROM drive assembly |
| 10 |
5.25-inch drive bay |
| 11 |
Hard-disk drive bays (4) |
|
|
The system board holds the system's control circuitry,
microprocessors, and other electronic components. Several hardware options such as the
microprocessors and memory are installed directly on the system board. The expansion-card
cage accommodates up to three full-length PCI expansion cards. The two peripheral bays
provide space for an integrated 3.5-inch diskette drive and CD-ROM drive assembly and an
additional 5.25-inch device such as a tape drive or an optional fifth hard-disk drive kit.
The hard-disk drive bays provide space for up to four 1-inch SCSI hard-disk drives.
These hard-disk drives are connected to a SCSI host adapter on the system board or on an
expansion card, via the SCSI backplane board.
The power cables leading from the power supply distribution board
(PSDB) distribute power to the system board, SCSI backplane board, all installed drives,
and the interposer board.
For non-SCSI drives such as the diskette drive and the CD-ROM drive,
an interface connector connects each drive to the interposer board or to an expansion
card. For SCSI devices, interface cables connect externally accessible SCSI devices and
the SCSI backplane board to a SCSI host adapter either on the system board or on an
expansion card. See "Drives" for detailed removal and
replacement instructions for all drives.
During a service procedure, you may be required to change a jumper
or switch setting. For information on the system board jumpers, see "Jumpers, Switches, and Connectors."
Figure 4.
Control Panel Assembly Removal
 |
| 1 |
Screw |
| 2 |
Control panel |
| 3 |
Control panel cable |
|
|
To remove the control panel assembly, perform the following
steps.
|
CAUTION: Read the safety
instructions in your System Information document. |
- Remove the front bezel.
- Open the system doors.
- Disconnect the control panel cable from the P4 connector on
the left side of the interposer board.
- Loosen the thumbscrew securing the peripheral cage (see Figure 10)
and slide the peripheral cage back
12.5 mm (0.5 inch).
It is not necessary to remove the peripheral cage or the drives installed in or on top of
the peripheral cage.
- Remove the screw holding the control panel assembly to the
front of the system chassis (see Figure 4).
Retain this screw for use in securing the replacement control panel assembly.
- Push the left side of the control panel assembly back 12.5
mm (0.5 inch) and then slide it to the right to free the control
panel from its chassis slot.
- Remove the control-panel assembly ribbon cable from its
retaining bracket inside the chassis.
To install a replacement control panel:
- Slide the control panel into its slot above the hard-disk drive cage, and
then swing the free end forward.
- Ensure that the two LEDs are in the
correct position in the front panel, and secure the
control panel with the screw removed in step 5 of the previous
procedure.
- Slide the peripheral cage forward and secure it with its thumbscrew.
- Reconnect the control panel cable to the interposer board P4
connector, and place the ribbon cable under its bracket.
Figure 5. Chassis
Intrusion Switch Removal
 |
| 1 |
Chassis intrusion switch |
| 2 |
Screw |
|
|
|
|
To remove the chassis intrusion switch, perform the
following steps.
|
CAUTION: Read the safety
instructions in your System Information document. |
- Turn off the system and any attached peripherals, and
disconnect them from the electrical outlet.
- Remove the front bezel.
- Open the system doors.
- Disconnect the chassis intrusion switch cable from the
INTRUS1 connector on the system board (see system board
features).
The INTRUS1 connector is located at the left back corner of
the system board, just forward of the Ethernet RJ45 connector.
- Remove the screw holding the intrusion switch and its
bracket to the chassis back panel (see Figure 5).
- Separate the switch and cable from the bracket.
- Lift the chassis intrusion switch and cable out of the
chassis.
Figure 6. Interposer
Board Removal
 |
| 1 |
Thumbscrew |
| 2 |
Interposer board |
|
|
|
|
To remove the interposer board, perform the following
steps.
NOTICE: See
"Protecting Against Electrostatic Discharge" in your System Information
document.
|
- Turn off the system and any attached peripherals, and
disconnect them from the electrical outlet.
- Remove the front bezel.
- Open the system doors .
- Disconnect all cables connected to the interposer board (see
Figure 7).
These cables include the system board interface cable, cooling fan wiring harness,
interposer board power cable, and the control panel cable.
- Loosen the thumbscrew at the center of the interposer board
(see Figure 6).
- Slide the interposer board toward the back of the system approximately 12.5 mm (0.5
inch), and then lift the interposer board out of the chassis.
Figure 7 and Figure 8 show examples of drive hardware that
can be installed in the system. Refer to this figure when you perform any of the
procedures in the following subsections.
Figure 7. Drive Hardware
 |
| 1 |
System board |
| 2 |
DC power distribution board |
| 3 |
Interposer board |
| 4 |
Integrated 3.5-inch diskette drive and
CD-ROM drive |
| 5 |
SCSI hard-disk drives (4 slots) |
|
|
|
|
Figure 8. Externally Accessible
Drives
 |
| 1 |
Interposer board |
| 2 |
Integrated 3.5-inch diskette drive and
CD-ROM drive |
| 3 |
Peripheral drive cage |
| 4 |
5.25-inch drive bay |
| 5 |
Hard-disk drives (4) |
|
|
The chassis provides one bay for an optional 5.25-inch externally accessible drive and
a bay dedicated to an integrated 3.5-inch diskette drive/CD-ROM drive assembly. The
optional 5.25-inch device may be a tape backup device or an optional fifth SCSI hard-disk
drive (installed as part of a kit).
Figure 9. 5.25-Inch Drive Removal
 |
| 1 |
5.25-inch drive |
| 2 |
Drive release tab (2) |
|
|
|
|
|
|
To remove an optional 5.25-inch drive from the externally
accessible 5.25-inch drive bay, perform the following steps.
NOTICE: See
"Protecting Against Electrostatic Discharge" in your System Information
document.
|
- Turn off the system and any attached peripherals, and
disconnect them from the electrical outlet.
- Remove the optional bezel, if one is attached.
- Open the system doors.
- Disconnect the DC power cable and the SCSI interface cable from the
SCSI backplane board on the back of the drive bay.
Record the power connector number and the location of the interface cable connector.
- Loosen the thumbscrew securing the peripheral bay, slide the
peripheral bay back 2.5 cm (1 inch), and then lift
the peripheral bay up and set it aside (see Figure 10).
Figure 10.
Peripheral Drive Cage Removal
 |
| 1 |
Thumbscrew |
| 2 |
Peripheral drive cage |
| 3 |
Integrated 3.5-inch diskette
drive and CD-ROM drive |
| 4 |
5.25-inch drive |
|
|
|
|
- Press inward (toward the center of the drive) on the two drive-release tabs, and slide
the drive out the front of the peripheral drive cage (see Figure 9).
- Remove the drive-mounting rails from the drive (see Figure 11).
Figure 11.
5.25-Inch Drive Mounting Rail Removal
 |
| 1 |
Screws (4) |
| 2 |
Drive mounting rails (2) |
| 3 |
Drive release tabs (2) |
|
|
|
|
- Record the setting of any jumpers on the back of the drive assembly.
 |
NOTE: When you reinstall
a replacement SCSI drive, ensure that the drive has the identical part number and that any
jumpers are at the settings you recorded.
|
To remove the integrated 3.5-inch diskette drive and CD-ROM
drive, perform the following steps:
- Turn off the system and any attached peripherals, and
disconnect them from the electrical outlet.
- Open the system doors.
- Remove the interposer board.
- Disconnect the DC power cables and the interface cables from the back
of all drives.
- Loosen the thumbscrew securing the peripheral drive cage, slide
the peripheral cage back 6.3 mm (0.25 inch), lift the peripheral drive cage out of the
chassis, and set it on a smooth, nonconducting work surface (see Figure 10).
- Lift the retention latch at the back of the integrated diskette drive and
CD-ROM drive (see Figure 12).
Figure 12.
3.5-inch Diskette Drive and CD-ROM Drive Removal
 |
| 1 |
Integrated diskette
drive and CD-ROM drive |
| 2 |
Retention latch |
| 3 |
Threaded standoff for interposer board
thumbscrew |
| 4 |
Interposer board
locking clips (2) |
| 5 |
Peripheral cage thumbscrew |
| 6 |
Locking clips (4) |
|
|
- Slide the assembly forward approximately 12.5 mm (0.5 inch) to release the
assembly from its locking clips, and then lift the assembly off the top of
the peripheral cage (see Figure 12).
When installing the replacement integrated diskette
drive and CD-ROM drive, make sure that the retaining tabs at the sides of the drive
assembly engage the locking clips on the top of the peripheral drive cage.
Each hard-disk drive is mounted in a hard-disk drive
carrier. The front bezel must be removed from the system front panel and a square metal
locking pin must be lifted out before you remove a drive carrier.
NOTICE: Hot-pluggable drive
removal and installation is not supported for systems without the optional integrated RAID
controller or a RAID controller card.
|
If the optional integrated RAID controller or a RAID
controller card and software are installed, hot-pluggable drives may be individually
powered down and replaced while the system is running.
To remove a hard-disk drive and its carrier, perform the following steps.
NOTICE: See
"Protecting Against Electrostatic Discharge" in your System Information
document.
|
- If the system does not have a RAID controller installed, shut down the system and
disconnect the cables.
- If the optional bezel is installed, remove it.
- If you have not already done so, unlock and open the system
doors and remove the hard-disk drive lock from the hard-disk drive you intend to
remove (see Figure 13).
Figure 13. Hard-Disk Drive
Lock
 |
| 1 |
Hard-disk drive lock |
| 2 |
Hard-disk drive carrier |
|
|
|
|
|
|
|
|
- For systems with RAID controllers, use the RAID software to power down the hard-disk
drive you intend to remove.
Wait until all three SCSI hard-disk drive indicators on the drive carrier handle are
turned off before proceeding.
- Open the drive carrier handle and slide the carrier forward
until it is free of the drive bay (see Figure 14).
Figure 14. Hard-Disk Drive and Carrier Removal
 |
| 1 |
Hard-disk drive |
| 2 |
Hard-disk drive carrier |
|
|
|
|
|
|
|
|
- If your replacement hard-disk drive is installed in its carrier, open the handle on the
carrier.
- If the replacement hard-disk drive has no carrier, remove the hard-disk drive that you
removed from its carrier:
- Remove the four screws that secure the drive to the carrier (see Figure 15).
- Remove the hard-disk drive from the carrier.
Figure 15. Hard-Disk Drive Removal From Carrier
 |
| 1 |
Screws (4) |
| 2 |
Hard-disk drive |
| 3 |
Hard-disk drive carrier |
|
|
|
|
|
|
To install a replacement hard-disk drive, perform the
following steps:
- Insert the replacement hard-disk drive into the carrier and install four screws to
secure the drive.
- Open the handle on the carrier and install the replacement hard-disk drive and carrier
into its slot. Close the handle until it engages the front panel, locking the drive in
place.
- Reinstall the hard-disk drive lock you removed in step 3 of the previous procedure.
- If you removed the front bezel in step 2 of the previous procedure, reinstall it now.
NOTICE: When
replacing the optional front bezel, ensure that the bezel is oriented so that its status
indicators are positioned just below the nameplate in the center of the bezel.
|
- If the drive is a hot-pluggable replacement that has already
been prepared, power the drive bay on and reintegrate the drive.
If the replacement drive is not a hot-pluggable hard-disk drive, run the Dell Diagnostics
to test and prepare the new drive.
The SCSI backplane board has connectors on the front that connect to the four hard-disk
drives and to two SCSI backplane daughter cards (see Figure
16). On the back side are connectors that connect either to one of the system
board SCSI connectors or to an expansion card connector. One SCSI connector attaches to an
optional SCSI device installed in the externally accessible peripheral bay, if installed.
A DC power connector accepts a power cord from the PSDB.
Figure 16. SCSI
Backplane
 |
| 1 |
Thumbscrew |
| 2 |
SCSI backplane board |
| 3 |
SCSI cable connectors (SCSIB) |
| 4 |
System board data cable connector
(PLANAR) |
| 5 |
Power connector (POWER2) |
| 6 |
SCSI cable connector (SCSIA) |
| 7 |
Data cable connector for optional
fifth hard-disk drive backplane (DRIVE5) |
|
|
To remove a SCSI backplane board, perform the following
steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system and any attached peripherals, and
disconnect them from the electrical outlet.
- Remove the optional bezel (if
installed).
- If you have not already done so, unlock and open the system
doors and remove the hard-disk drive locks from the
hard-disk drive bays (see Figure 13).
- Remove the fan assembly.
NOTICE: You must remove all hard-disk
drives to gain access to the SCSI daughter cards and to enable the removal of the SCSI
backplane board.
|
- Remove all four hard-disk
drives from the hard-disk drive bay. Label the drives with their location in the
hard-disk drive bay.
- Remove the SCSI backplane daughter cards by opening the retention lever on each card's
front edge and pulling the daughter card out of its socket on the SCSI backplane (see Figure 17).
When installing a replacement SCSI backplane board, see Figure
18 for cable connections.
Figure 17. SCSI Daughter Card
Removal
 |
| 1 |
SCSI backplane board |
| 2 |
SCSI backplane daughter cards (2) |
| 3 |
Retention lever |
|
|
|
|
|
|
- Record the connectors used and disconnect all SCSI cables attached to the SCSI backplane
board (see Figure 16).
The DC power connector (POWER2) is connected to the power input connector on the backplane
board and should not be disconnected.
Figure 18. SCSI
Backplane Connections
 |
| 1 |
Thumbscrew |
| 2 |
SCSI backplane board data cable |
| 3 |
SCSI backplane board interface cable
|
| 4 |
SCSI data cable to system board
(SCSIA) |
|
|
- Loosen the thumbscrew on the SCSI backplane board (see Figure 18).
- Slide the SCSI backplane board to the right (toward the
center of the chassis) about 6.3 mm (0.25 inch) and lift it off the L-shaped mounting tabs
on the hard-disk drive cage.
Optional Fifth Hard-Disk Drive SCSI Backplane
The optional fifth hard-disk drive has a small SCSI backplane board on the back of the
hard-disk drive cage.
Figure
19. Removing of the SCSI Backplane From the Optional Fifth Hard-Disk Drive Cage
 |
| 1 |
Optional fifth hard-disk drive
cage |
| 2 |
SCSI backplane |
| 3 |
Screws (2) |
|
|
|
|
To remove the SCSI backplane from the optional fifth hard-disk drive cage, perform the
following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system and any attached peripherals, and
disconnect them from the electrical outlet.
- If the optional bezel is installed, remove it.
- If you have not already done so, unlock and open the system
doors.
- Remove the optional fifth hard-disk drive
and carrier from the hard-disk drive cage mounted in the peripheral bay.
- Remove the ribbon-style backplane cable from the 10-conductor connector on the SCSI
backplane.
- Remove the 68-conductor SCSI data cable from the fifth hard-disk drive SCSI backplane board.
- Remove the DC power cable from the SCSI backplane board.
- Loosen the thumbscrew securing the peripheral bay, slide the peripheral bay back
2.5 cm (1 inch), and then lift the peripheral bay up and set it aside (see Figure 10).
- Release the optional fifth hard-disk drive cage by pressing inward (toward the center of
the drive) on the two drive-release tabs and sliding the hard-disk drive cage out the
front of the peripheral bay (see Figure 9).
- Use a 1/4-inch nut driver or a #2 Phillips screwdriver to remove the two screws that
secure the SCSI backplane to the back of the hard-disk drive cage (see Figure 19).
Three cooling fans are installed in the center of the system chassis. (Fan 1 is the
outermost fan in the fan assembly.) If you observe that one of the fans is not operating
or if the Dell server management application issues a fan-related error message, replace
the faulty fan. There is also a cooling shroud for the memory modules.
Fan Replacement
NOTICE: See
"Protecting Against Electrostatic Discharge" in your System Information
document.
|
- Turn off the system, including any attached peripherals, and disconnect the power cable
from its power source.
- Open the system doors.
- Disconnect the cooling fan power cable from the interposer board by pressing the release
tab on the power cable connector.
- Remove the thumbscrew and lift the fan assembly out of the chassis (see Figure 20).
Figure 20. Fan Assembly
Removal
 |
| 1 |
Cooling fans (3) |
| 2 |
Fan bracket |
| 3 |
Thumbscrew |
|
|
- To replace an individual fan, perform the following steps:
- Separate the two halves of the fan assembly by pressing the locking tabs at each end of
the assembly.
- Remove the faulty fan and disconnect it from the cooling fan wiring harness.
- Install a new fan in the assembly and connect it to the cooling fan wiring harness.
Ensure that the replacement fan is oriented the same way as the original fan.
- Join the two halves of the fan assembly.
- Slide the fan assembly back into the system and reinstall the retention thumbscrew.
When reinstalling the fan, be careful to avoid pinching the system interface cables.
- Connect the cooling fan power cable to the interposer board.
- Close the system doors and reconnect the system to power.
- Turn on the system.
Memory Module Cooling Shroud
Your system includes a separate cooling shroud that covers the memory modules. If you
add memory modules or require access to the RAID battery connector on the system board,
you must remove this shroud.
Figure 21. Cooling Shroud
 |
| 1 |
Cooling shroud |
| 2 |
Fan power cable |
| 3 |
Tab |
| 4 |
Power supply bay |
| 5 |
Pocket |
|
|
|
|
|
|
NOTICE: See
"Protecting Against Electrostatic Discharge" in your System Information
document.
|
To remove the shroud, perform the following steps:
- Turn off the system, including any attached peripherals, and disconnect the system from
the electrical outlet.
- Slide the system out of the rack and open the system covers.
- Disconnect the fan power cable from the cooling fan wiring harness.
If necessary, disconnect the intrusion alarm switch cable and the SCSI data cable from the
system board.
- See the system information label on the inside of the computer cover for the location of
these connectors on the system board.
- Lift the shroud straight up to remove it from the system.
To reinstall the shroud, perform the following steps:
- Position the shroud above the memory modules and lower it into position so that the tab
on the edge of the shroud fits into the matching slot on the wall of the power supply bay
(see Figure 21).
If a RAID memory module is installed, make sure that the plastic shield on the shroud fits
between the RAID memory module and DIMM_D (if present).
- Connect the fan power cable to the connector labeled FAN4 on the cooling fan wiring
harness.
If you disconnected the intrusion alarm switch cable and the SCSI data cable from the
system board prior to removing the shroud assembly, reconnect these cables.
The shroud is held in position by the system cover when the system is latched closed.
The system may contain one or two hot-pluggable power supplies.
Figure 22. Hot-Pluggable
Power Supply Removal
 |
| 1 |
Latch |
| 2 |
Power supply |
| 3 |
Handle |
|
|
|
|
To remove a hot-pluggable power supply with the system operating, perform the following
steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
|
CAUTION: Avoid touching the
card-edge connector on the back of the power supply. Wait 10 to 20 seconds after
disconnecting the power supply from its slot connector before removing the power supply or
coming into contact with its back card-edge connector.
|
- Open the system doors.
- Observe the status indicators on the back of each power supply. If the red (forwardmost)
indicator lights up, replace that power supply.
- If only one power supply is installed in the system, turn off the system, including any
attached peripherals, and disconnect the system from its electrical outlet.
If two hot-pluggable power supplies are installed, disconnect only the faulty power supply
from its electrical outlet.
- Unplug the power cord from the faulty power supply.
NOTICE: The power supply is heavy. Support it with both hands when installing or
removing it.
- Remove the power supply:
- The power supply is secured by a latch on the back panel of the system.
- Rotate the top of the power supply latch downward.
- Grasp the handle on the top of the power supply and lift the power supply straight up
from the system.
- Lower the new power supply into the chassis.
Ensure that the power supply is properly seated in its slot in the chassis.
- Close the power supply latch.
As the latch closes, notice that the power supply slides back in its slot to engage its
back-panel connectors with the mating connector on the PSDB.
| |
NOTE: The power supply
will not function until the latch is engaged.
|
- Connect the power cable to the new power supply and route the cable through the
strain-relief clip on the back panel.
- Connect the free end of the power cable to an electrical outlet.
- Observe the back panel of the power supply to verify that the green power indicator LED
is lit and that the red failure LED is off.
- Close the top doors.
Figure 23. Power Supply Distribution Board Removal
 |
| 1 |
Power connector P1 |
| 2 |
Thumbscrew |
| 3 |
Power connector P3 |
| 4 |
Power connector P2 |
|
|
To remove the PSDB, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and disconnect the power
cable(s) from its (their) power source.
- Open the system doors.
- On the back of each installed power supply, disconnect the power cable and rotate the
top of the power supply latch downward.
- Remove the fan assembly.
- Record the mating connector location on the PSDB (see Figure 23),
and disconnect the 12-conductor power cable harness attached to the P3 connector.
- Record the mating connector location and disconnect the 24-conductor power cable
harness attached to the P1 connector on the PSDB.
- Record the mating connector location and disconnect the 18-conductor power cable
harness attached to the P2 connector on the PSDB.
- Loosen the thumbscrew on the PSDB and remove the PSDB from the chassis.
When installing the replacement PSDB, fold the cable harnesses out of the way as you
are inserting the PSDB. The side of the PSDB with the card-edge connector that mates with
the power supply connector should be lowered into position first; this simplifies
installation of the PSDB.
Figure 24. System Board Removal
To remove the system board, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and disconnect the system from
its electrical outlet.
- Open the system doors.
- Remove all external peripheral cables from their connectors on the back of the system.
- Record the locations and remove all internal cables (including power cables) attached to
the system board.
- Remove the expansion card cage.
- Remove the fan assembly.
- Slide the system board toward the front of the chassis about 6.3 mm (0.25 inch).
- Carefully lift the system board up and out of the chassis. Be sure to lift evenly and to
not twist the system board.
- Place the system board on a smooth, antistatic surface.
- Remove the microprocessor(s).
- Remove the memory modules.
- Remove the integrated RAID hardware key connector (if installed).
- Remove the integrated RAID SDRAM memory module (if installed).
Keep this memory module separate from the system memory modules.
NOTICE: Use only unbuffered 64-MB or 128-MB SDRAM memory modules in the
DIMM_RAID socket.
To install the replacement system board:
- Install the system board into the chassis, and then install the following components
that you removed from the old system board: memory modules, microprocessor(s), terminator
card or secondary microprocessor, RAID hardware key, and RAID memory module (if the
integrated RAID system is used).
- Set the system board jumpers on the new board to match the settings on the board you
removed.
- Install the expansion-card cage.
- Replace the fan assembly.
- Connect all internal cables to the system board, and then close the system doors.
- Reconnect the I/O cables and power cables to the back panel, and turn the system power
on.
Figure 25 defines the system board features. Refer to
this figure when replacing your system board or components that attach to the system
board.
Figure 25. System Board Features
1
|
Serial port connector (COM1) |
2
|
Serial port connector (COM2) |
3
|
Video connector (VGA) |
4 |
Parallel port connector (PARALLEL) |
| 5 |
Gigabit network interface card (NIC) connector |
| 6 |
10/100-Mb NIC connector |
7
|
Universal Serial Bus (USB) connectors (2) |
8 |
Keyboard and mouse connectors (KYBD/MOUSE) |
9
|
Chassis intrusion switch connector (INTRUS1) |
10 |
Hardware key connector for optional RAID
controller (RAID_KEY) |
11
|
SCSI connector SCSIB |
| 12 |
SCSI connector SCSIA |
13 |
Memory module socket for optional RAID controller
(DIMM_RAID) |
14 |
3.3-V system board VRM |
15 |
Power input connector (POWER1) |
16 |
RAID controller battery connector |
17 |
Interposer board interface cable connector (I/O
CONN) |
18 |
SCSI backplane board interface cable connector
(BACKPLANE) |
19 |
Power input connector (POWER1) |
20
|
Primary microprocessor |
21 |
Secondary microprocessor |
22 |
Primary VRM |
23 |
Secondary VRM |
24 |
Memory module sockets |
| 25 |
Battery connector |
| 26 |
Configuration jumpers |
| 27 |
PCI riser board connector |
The system has a removable expansion-card cage, which allows the user to remove the
riser board and all installed expansion cards at the same time.
To remove the expansion-card cage, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and disconnect the system from
its electrical outlet.
- Open the system doors.
- Check any cables connected to expansion cards through the back-panel openings.
Disconnect any cables that will not reach to where the cage must be placed after removal
from the chassis.
|
NOTE: Verify that the power LED on
the riser board is off before removing the card cage. |
- Locate the expansion-card cage securing lever
(see Figure 26), and rotate the lever upward until it stops in an upright position.
Figure 26. Expansion-Card Cage
 |
| 1 |
PCI expansion-card cage |
| 2 |
Securing lever |
|
|
- Lift the expansion-card cage up and away from the chassis.
To replace the expansion-card cage, perform the following steps:
- With the securing lever in the upright position, lower the expansion-card cage into
place until it is aligned.
- Rotate the securing lever downward until it is flush with the top of the chassis.
Make sure the riser board is fully seated in the RISER connector on the system board.
- Reconnect any cables you removed in step 3 of the previous procedure, "Expansion-Card Cage Removal."
The riser board contains three full-length 64-bit, 33-MHz
PCI expansion-card connectors. All three connectors support both 5-V and universal
(3.3-V and 5-V) expansion cards. Connector PCI2 supports an optional Dell
OpenManage™ Remote Assistant Card II (DRAC II).
Figure 27. Riser Board Connectors
 |
| 1 |
Riser board |
| 2 |
DRAC II server management connector |
| 3 |
Thumbscrew |
| 4 |
PCI expansion-card connector PCI3 |
| 5 |
PCI expansion-card connector PCI2 |
| 6 |
PCI expansion-card connector PCI1 |
|
|
To remove the riser board, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and
disconnect the system from its electrical outlet.
- Open the system doors.
- Disconnect any cables connected to the riser board.
- Remove the expansion-card cage.
- Remove all expansion cards from the expansion-card
cage.
- Remove the thumbscrew that secures the riser board to the expansion-card cage.
- Slide the riser board 6.3 mm (0.25 inch) to the left (with the riser board facing you)
and lift the riser board out of the expansion-card cage.
To remove an expansion card, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and
disconnect the system from its electrical outlet.
- Open the system doors.
- Disconnect any cables connected to the card.
- Remove the expansion-card cage.
- To release an expansion-card's back-panel bracket, rotate the latch away from the
expansion-card bracket (see Figure 28).
- If the expansion card is a full-length card, release the card's inner end (toward the
front of the system) by opening the tab on the plastic card guide (see Figure 28).
Figure 28. Expansion Card
Removal
 |
| 1 |
Expansion-card latch |
| 2 |
Expansion card |
| 3 |
Card guide tab |
| 4 |
Expansion-card cage |
| 5 |
Riser board |
| 6 |
Expansion-card connector |
| 7 |
Card-edge connector |
|
|
|
- Grasp the expansion card by its top corners, and carefully remove it from the
expansion-card connector.
- If you are removing the card permanently, install a metal filler bracket over the empty
card-slot opening.
|
NOTE: Installing a filler bracket
over an empty expansion slot is necessary to maintain Federal Communications Commission
(FCC) certification of the system. The brackets also keep dust and dirt out of the system
and aid in proper cooling and airflow inside the system. |
- Replace the expansion-card cage.
- Reconnect any cables that you disconnected in step 3.
- Close the system doors, reconnect the
system and peripherals to their power sources, and turn them on.
To install a replacement expansion card, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and
disconnect the system from its electrical outlet.
- Open the system doors.
- Remove the expansion-card cage.
- Prepare the replacement expansion card for installation.
See the documentation that came with the expansion card for information on configuring the
card, making internal connections, or otherwise customizing the card for the system.
- Select the expansion slot where you will install the new expansion card.
- To release an expansion-card's back-panel bracket, rotate the latch away from the
expansion-card bracket (see Figure 28).
- Insert the card-edge connector firmly into the expansion-card connector on the chassis.
- When the card is firmly seated in the connector and the card-mounting bracket is aligned
with the brackets on either side of it, close the expansion-card latch.
- If the expansion card is a full-length card, secure the inner end of the card by closing
the card guide tab over the top edge of the card (see Figure
28).
- Connect any cables that should be attached to the card.
See the documentation that came with the card for information about cable connections.
- Install the expansion-card cage in the chassis.
- Close the system doors, reconnect the system and
peripherals to their power sources, and turn them on.
The optional integrated RAID controller will not function if the RAID hardware key is
missing or not properly installed in its socket (see Figure 25
for the location on the system board).
Figure 29. RAID Hardware Key Installation
 |
| 1 |
RAID hardware key |
| 2 |
Socket latches (2) |
| 3 |
Socket |
|
|
|
|
|
|
To remove the RAID hardware key from its socket, press the latches down and outward.
To install the RAID hardware key, perform the following steps:
- Insert the hardware key in its socket on the system board.
The RAID hardware key has an alignment key that allows the key to be installed in the
socket in only one way.
- Press on the RAID hardware key to seat the key in its socket, and secure the key with
the latches on each end of the socket (see Figure 29).
To install the RAID battery, perform the following steps:
- Insert the RAID battery into the bracket on the underside of the system door (see Figure 30).
- Connect the battery cable to the RAID battery connector on the system board (see Figure 25).
Figure 30. Installing the RAID Battery
 |
| 1 |
RAID battery (optional) |
| 2 |
System door |
|
|
|
|
|
|
|
|
NOTICE: Use only unbuffered SDRAM memory modules rated to run at 100 MHz or
faster in the DIMM_RAID socket. Do not substitute registered SDRAM memory modules such as
those used for system memory.
A single optional memory module socket (DIMM_RAID) for the integrated RAID controller
is shown in Figure 31. The memory
module is removed and replaced using the following procedures for conventional memory
memory modules; however, only unbuffered SDRAM memory modules that are specifically for
use with the integrated RAID controller can be used.
Figure 31. Installing the RAID
Controller Memory Module
 |
| 1 |
Alignment keys (2) |
| 2 |
DIMM_RAID socket ejectors (2) |
|
|
|
|
|
|
|
|
To remove and replace the integrated RAID controller memory module in its socket,
perform the following steps:
- Turn off the system, including any attached peripherals, and disconnect the power cable
from its power source.
- Open the system doors.
- Locate the DIMM_RAID socket in which you will install or replace a memory module.
Figure 25 shows the location of the DIMM_RAID socket
on the system board.
- Press the ejectors on the DIMM_RAID socket down and outward, as shown in Figure 31, to release the memory module from
the socket.
- Align the replacement memory module's edge connector with the slot in the center of the
memory module socket, and insert the memory module in the socket (see Figure 31).
The DIMM_RAID socket has two alignment keys that allow the memory module to be installed
in the socket in only one way.
- Press on the memory module with your thumbs while pulling on the ejectors with your
index fingers to lock the memory module into the socket.
- Close the system doors, reconnect the system and
peripherals to their power sources, and turn them on.
The four memory module sockets on the system board can accommodate 128 MB to 4 GB of
registered SDRAM. The memory module sockets are located near the back edge of the system
board (see Figure 25 for the location on the system
board).
System Memory Upgrade Kits
The system is upgradeable to 4 GB by installing combinations of 64-, 128-, 256-, 512-MB,
and 1-GB registered memory modules. You can purchase memory upgrade kits from Dell as
needed.
|
NOTE: The memory modules must be
rated to run at 133 MHz or faster. |
Memory Module Installation Guidelines
Starting with the socket nearest to the system board's back edge, the memory module
sockets are labeled "DIMM_A" through "DIMM_D" (see
Figure 32). When you install memory modules, follow these guidelines:
- Install a memory module in socket DIMM_A before socket DIMM_B, socket DIMM_B before
socket DIMM_C, and so on.
- If you install different sizes of memory modules, install them in order of descending
capacity, beginning with the highest-capacity memory module in socket DIMM_A.
- You must install memory modules in matching pairs.
Figure 32. Memory Module Socket Locations
 |
| 1 |
DIMM_A |
| 2 |
DIMM_B |
| 2 |
DIMM_C |
| 2 |
DIMM_D |
|
|
Table 2 illustrates several sample memory configurations based on these guidelines.
| |
Memory Module Sockets |
Total Desired
Memory |
DIMM_A |
DIMM_B |
DIMM_C |
DIMM_D |
| 128 MB |
64 MB |
64 MB |
None |
None |
| 256 MB |
128 MB |
128 MB |
None |
None |
| 512 MB |
256 MB |
256 MB |
None |
None |
| 1 GB |
256 MB |
256 MB |
256 MB |
256 MB |
| 2 GB |
512 MB |
512 MB |
512 MB |
512 MB |
| 4 GB |
1 GB |
1 GB |
1 GB |
1 GB |
To upgrade the memory on the system board, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and disconnect the power cable
from its power source.
- Remove the front bezel.
- Open the system doors.
- Locate the memory module sockets where you will install or replace memory modules.
Figure 25 shows the relative location of the memory
module sockets on the system board. Figure 32 shows the labeling
of the memory module sockets.
- Install or replace the
memory modules as necessary to reach the desired memory total.
- Close the system doors, replace the
optional front bezel (if one is present), reconnect the system
to the electrical outlet, and turn on the system.
After the system completes the POST routine, it runs a memory test that displays the new
memory total, which includes all newly installed memory.
|
NOTE: If the memory total is
incorrect, turn off and disconnect the system and peripherals from their power sources,
open the system doors, and check all installed memory modules to make sure they are seated
properly in their sockets. Ensure that the installed memory modules conform to one of the
configurations listed in Table 2.
|
- The system detects that the new memory does not match the system configuration
information, which is stored in nonvolatile RAM (NVRAM), and the following error message
appears:
Press <F1> to continue; <F2> to enter System Setup
- Press <F2> to enter the System Setup program and check the
System Memory setting in the system data box on the System Setup screens.
The system should have already changed the value in the System Memory
setting to reflect the newly installed memory.
- If the System Memory value is incorrect, one or more of the memory
modules may not be installed properly. Repeat steps 1 through 9, and carefully examine
each memory module to ensure proper seating in its socket.
- Run the system memory test in the Dell Diagnostics (see your Installation and
Troubleshooting Guide for complete information).
To install a memory module, perform the following steps.
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and disconnect the power cable
from its power source.
- Remove the front bezel.
- Open the system doors.
- Disconnect the power cable and all peripheral cables from the back panel of the system.
- Locate the memory module sockets where you will install or replace memory modules.
Figure 25 shows the relative location of the memory
module sockets on the system board. Figure 32 shows the labeling
of the memory module sockets.
- Press down and outward on the ejectors on the memory module socket, as shown in
Figure 33, to allow the memory module to be inserted into the socket.
Figure 33. Memory Module Installation
|
| 1 |
Alignment keys (2) |
| 2 |
Memory module socket ejectors (2) |
|
|
|
|
- Align the memory module's edge connector with the slot in the center of the memory
module socket, and insert the memory module in the socket (see Figure
33).
The memory module socket has two alignment keys that allow the memory module to be
installed in the socket in only one way.
- Press down on the memory module with your thumbs while pulling up on the ejectors with
your index fingers to lock the memory module into the socket (see
Figure 33).
When the memory module is properly seated in the socket, the ejectors on the memory module
socket should align with the ejectors on the other sockets with memory modules installed.
- Repeat steps 6 through 8 to install the remaining memory modules.
To remove a memory module, press down and outward on the ejectors on each end of the
socket until the memory module pops out of the socket (see Figure 34).
|
NOTES: This procedure assumes
that the power is off and that you have access to the memory module slots. See steps
1 through 6 of the memory module
installation procedure for these preliminary steps.
If you encounter difficulty in moving the ejector nearest to the chassis wall, press down
on the opposite ejector and lift that end of the memory module slightly to free the memory
module from its socket. |
Figure 34. Memory Module Removal
 |
| 1 |
Alignment keys (2) |
| 2 |
Memory module socket ejectors (2) |
|
|
|
|
To take advantage of future options in speed and functionality, you can add a second
processor or replace either the primary or secondary processor.
NOTICE: The second processor
must be of the same type and speed as the first processor.
|
Each processor and its associated level 2 (L2) cache memory are contained in a Flip
Chip Pin Grid Array (FC-PGA) package that is installed in a zero insertion force (ZIF)
socket on the system board. The following subsection describes how to install or replace
the microprocessor in either the primary or secondary processor connector.
Installing or Replacing a Microprocessor
In addition to the ZIF socket for the primary microprocessor on the system board, there
is a second ZIF socket to accommodate a secondary microprocessor. The secondary
microprocessor must have the same operating frequency as the primary microprocessor.
The following items are included in the microprocessor upgrade kit:
- A microprocessor
- A heat sink
- A retention clip
- A voltage regulator module (VRM), used if adding a second processor
NOTICE: See "Protecting
Against Electrostatic Discharge" in your System Information document.
|
- Turn off the system, including any attached peripherals, and
disconnect the power cable from its power source.
- Open the system doors.
- To remove the retention clip that secures the heat sink to the
microprocessor socket, press down firmly on the release tab on the retention clip, and then remove
the clip from the heat sink (see Figure 35).
Figure 35. Retention Clip
 |
| 1 |
Press here to release retention clip |
|
|
NOTICE: Never
remove the heat sink from a microprocessor unless you intend to remove the microprocessor.
The heat sink is necessary to maintain proper thermal conditions.
|
|
CAUTION: The
microprocessor chip and heat sink can become extremely hot. Be sure that the
microprocessor has had sufficient time to cool before handling. |
- Remove the heat sink.
NOTICE: Be careful not to
bend any of the pins when removing the microprocessor chip. Bending the pins can
permanently damage the microprocessor chip.
|
- Remove the microprocessor chip from the socket by pulling the
socket release lever straight up until the chip is released (see Figure
36) and then lifting the chip out of the socket.
Leave the release lever up so that the socket is ready for the new microprocessor.
Figure 36. Removing the Microprocessor
 |
| 1 |
Microprocessor chip |
| 2 |
Release lever |
| 3 |
Microprocessor socket |
|
|
- Unpack the new microprocessor.
NOTICE: Identifying the pin-1
corners is critical to positioning the chip correctly.
|
- Identify the pin-1 corner of the microprocessor by turning the
chip over and locating the tiny gold triangle that extends from one corner of the large
central rectangular area. The gold triangle points toward pin 1, which is also uniquely
identified by a square pad.
Figure 37. Pin-1 Identification
 |
| 1 |
Pin-1 corner (gold triangle) |
|
|
NOTICE: Positioning the
microprocessor incorrectly can permanently damage the chip and the system when you turn on
the system.
|
- Align the pin-1 corner of the microprocessor chip (see Figure 38)
with the pin-1 corner of the microprocessor socket.
Figure 38. Installing the Microprocessor Chip
 |
| 1 |
Pin-1 corners of chip and socket aligned |
|
|
- Install the microprocessor chip in the socket (see Figure 38).
- If the release lever on the microprocessor socket is not all the way up, move it to that
position now.
NOTICE: When placing the
microprocessor chip in the socket, be sure that all of the pins on the chip go into the
corresponding holes of the socket. Be careful not to bend the pins.
|
- With the pin-1 corners of the chip and socket aligned, set the chip lightly in
the socket and make sure that all pins are matched with the correct holes in the socket.
Because the system uses a ZIF microprocessor socket, there is no need to use force (which
could bend the pins if the chip is misaligned). When the chip is positioned correctly, it
should drop down into the socket with minimal pressure.
- When the chip is fully seated in the socket, rotate the socket release lever
back down until it snaps into place, securing the chip.
NOTICE: To avoid possible damage to
the microprocessor, you must align the heat sink so that the triangular mark on the heat
sink points toward the triangular mark on the system board.
|
- Install the heat sink. See Figure 39 for
the correct heat sink orientation.
- If the heat sink provided has a foil thermal interface material strip on the bottom of
the heat sink, place the heat sink on the microprocessor.
- If the heat sink provided has a thermal grease tab, remove the tab and place the heat
sink on the microprocessor.
- If heat sink thermal grease is provided separately, clean the heat sink and apply the
thermal grease before placing the heat sink on the microprocessor.
- To replace the retention clip, hold the clip by the release tab
so that the release tab is
adjacent to the triangular marks on the heat sink and the system board. Hook the
opposite end of the clip over the tab on the edge of the socket closest to the cooling fans; then
press down on the release tab to snap the clip over the tab on
the socket (see
Figure 39).
Figure 39. Installing the Heat Sink
 |
| 1 |
Retention clip
release tab |
| 2 |
Heat sink |
| 3 |
Microprocessor chip |
| 4 |
Microprocessor socket |
| 5 |
Release lever |
|
|
- If you are adding a second microprocessor, insert the VRM in the
secondary VRM socket, making sure that the latches at each end of the socket engage (see Figure 40).
Figure 40. Installing the VRM
 |
| 1 |
VRM |
| 2 |
Latches |
| 3 |
VRM socket |
|
|
- Close the system doors.
- Reconnect your system and peripherals to their
electrical outlets and turn them on.
- Press <F2> to enter the System Setup
program, and check that the microprocessor categories match the new system configuration.
See the system’s User’s Guide for instructions.
As the system boots, it detects the presence of the new
processor and automatically changes the system configuration information in the System
Setup program.
The system battery maintains system configuration, date,
and time information in a special section of memory when you turn off the system. The
operating life of the battery ranges from 2 to 5 years, depending on how you use the
system (for example, if you keep the system on most of the time, the battery gets little
use and thus lasts longer). You may need to replace the battery if an incorrect time or
date is displayed during the boot routine along with the following or similar message:
Time-of-day not set -- please run SETUP program
Strike the F1 key to continue, F2 to run the setup utility
or
System CMOS checksum bad -- Run SETUP
Strike the F1 key to continue, F2 to run the setup utility
or
Invalid configuration information -- please run SETUP
program
Strike the F1 key to continue, F2 to run the setup utility
To determine if the battery needs replacing, re-enter the
time and date through the System
Setup program. Turn off the system for a few hours, and then turn it on again. Enter
the System Setup program. If the date and time are not correct in the System Setup
program, replace the battery.
|
NOTES: Some software may
cause the system time to speed up or slow down. If the system seems to operate normally
except for the time kept in the System Setup program, the problem may be caused by
software rather than by a defective battery. If the system is turned off for long periods of time (for weeks or
months), the NVRAM may lose its system configuration information. This situation is
not caused by a defective battery. |
You can operate the system without a battery; however, the system configuration
information maintained by the battery in NVRAM is erased each time you shut down the
system. Therefore, you must re-enter the system configuration information and reset the
options each time the system initializes until you replace the battery.
The battery is a
3.0-V coin-cell CR2032-type battery. To remove the battery, perform the following steps.
|
CAUTION: There is a danger of a new battery
exploding if it is incorrectly installed. Replace the battery only with the same or
equivalent type recommended by the manufacturer. Discard used batteries according to the
manufacturer’s instructions. |
- Enter the System Setup program and, if possible, make a printed copy of the System Setup
screens.
See "Using the System Setup Program" for instructions.
- Shut down the system, including any attached peripherals, and disconnect the system from
the electrical outlet.
NOTICE: See "Protecting Against
Electrostatic Discharge" in your System Information document.
|
- Open the
system doors.
If necessary, remove the expansion cards to gain access to the battery.
Remove the battery.
Pry the battery out of its socket with your fingers or with a blunt, nonconductive object
such as a plastic screwdriver.
Install the new battery with the side
labeled "+" facing up (see Figure 41).
Figure 41. Battery Replacement
- Reinstall any expansion cards
removed in step 5.
- Close the system doors,
reconnect the system and peripherals to their power sources, and turn them on.
- Enter the System Setup program to confirm that the battery is operating
properly.
- Enter the correct time and date through the System Setup program's Time
and Date settings. Also enter any system configuration information that
is no longer displayed on the System Setup screens, and then exit the System Setup
program.
- Turn off the system and peripherals, and leave them off for at least an hour.
- After an hour, turn on the system and enter the
System Setup program. If the time and date are still incorrect,
replace the system board.
Back to Contents Page
|
