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 manual and elsewhere in Dell
documentation. Always follow the instructions closely. Make sure to review all
of the procedures in "Safety Instructions" in your System Information
document.
This section provides servicing procedures for components inside the system. Before you
start any of the procedures in this section, perform the following tasks:
The front bezel has status indicators. Swinging the bezel open provides access to the power switch, diskette drive, CD drive, hard
drive(s), and power supplies. You must open or remove the bezel and remove the system cover to gain access to internal components.
NOTE: The retaining pins are spring loaded. After rotating the pins downward and releasing the
pins, they will automatically be inserted into the retaining hinge. You may need to move the bezel
slightly to properly align the pins with the retaining hinge.
Align the two bezel retaining pins with the retaining hinge on the front of the
system (see Figure 2).
Rotate the pins downward, and release the pins to attach the bezel to the system.
The system is enclosed by a front bezel and a cover. To upgrade or
troubleshoot the system, remove the system cover to gain access to internal
components. The cover is attached to the chassis by three thumbscrews.
The system board can accommodate up to seven PCI expansion cards (six PCI or
PCI-X cards at 64-bit/33–100 MHz and one PCI card at 32-bit/33 MHz). The system memory is contained on two separate riser cards that must be populated with at least two memory modules each for the system to operate. The peripheral bay provides space for a 3.5-inch diskette drive, a CD drive, and two other devices (two hard drives or one tape drive).
The hard-drive bays provide space for up to eight 1-inch SCSI hard drives. These hard drives are connected to a SCSI host adapter on the system board or on an expansion card, via the SCSI backplane board.
The power distribution board (PDB) provides AC switching, hot-plug logic, and power distribution for the system. The system has two AC power inputs available to support AC power redundancy. The system can operate from either input and automatically switches from a failing AC source. Three hot-pluggable power supplies that are front-loadable and slide into connectors mounted on the PDB provide power to the system board, SCSI backplane board, and internal peripherals. There is an option for a fourth hot-pluggable power supply to provide redundant DC power.
For non-SCSI drives such as the diskette drive and CD drive, an interface cable connects the interposer board, attached to the diskette drive and CD drive, to the system board. 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.
Turn off the system, including any attached peripherals, and disconnect
the system from the electrical outlet.
NOTICE: The power supplies are hot-pluggable. The system requires three power supplies to be
installed for the system to operate normally. The system is in the redundant mode when all four
power supplies are installed. Remove and replace only one power supply at a time.
Remove the power supply by grasping the power supply handle, pressing down on the
release lever, and pulling the power supply straight out to clear the chassis (see
Figure 7).
NOTE: There are cables routed over the cooling shroud through retaining clips. You must
remove the cables from the retaining clips before you can remove the cooling shroud.
Remove the cables from the cooling shroud's retaining clips.
Loosen the two thumbscrews securing the cooling shroud to the system (see
Figure 8).
Lift the cooling shroud up to clear the memory riser cards and the chassis (see
Figure 8).
The system includes two fan assemblies containing a total of six fans. The front fan assembly contains two fans and the back fan assembly contains four fans.
The daughter card fits between the sides of a card guide above the drive bay. To install
the daughter card in the card guide, performing the following steps:
Hold the daughter card by its edges with the component side facing up and the
card connector facing the SCSI backplane board (see Figure
12).
Ensure that the retention lever is in the open position.
Position the card in the drive bay so that the notches on the left and right edges of
the card are aligned with the tabs on the card guide above the drive bay.
Lower the card into the card guide.
Close the retention lever to slide the daughter card into the SCSI backplane connector
and lock the card into place (see Figure
12).
Reconfigure the SCSI cable connections to the SCSI backplane as necessary to
operate the backplane as a 2x4 split backplane.
Each SCSI hard drive is mounted in a hard-drive carrier.
NOTICE: See "Protecting Against Electrostatic Discharge" in the safety instructions in your
System Information document.
NOTICE: Hot-pluggable hard drives are only supported if the
optional integrated RAID controller (or an approved RAID controller card) and
appropriate software is installed.
If an approved optional RAID controller and software are installed, hot-pluggable
hard drives can be individually shut down and replaced while the system is operating.
To remove a hard drive and its carrier, perform the following steps.
CAUTION: Read the safety instructions
in your System Information document.
If the system does not have an approved RAID controller
installed, shut down the system and disconnect the cables.
Turn off the system, including any attached peripherals, and disconnect the system
from the electrical outlet.
Prepare the controller card and drive for installation.
Ground yourself by touching an unpainted metal surface on the back of the
system, unpack the drive and controller card, and compare the jumper and
switch settings with those in the drive documentation. Change any settings
necessary for your system's configuration.
Check all cable connections that may have been loosened during this procedure, and
arrange cables so that they will not catch on the system cover or block the airflow of
the fans or cooling vents.
The SCSI backplane automatically
configures SCSI ID numbers and SCSI termination on individual hard drives, greatly
simplifying drive installation.
The SCSI backplane board has connectors on the front that connect to the
eight hard drives. On the back of the SCSI backplane board are connectors for connecting cables to the system board SCSI connectors or to an expansion card
connector (see Figure 18). Also on the back of the SCSI backplane board is a DC power connector
for connecting a power cable from the power distribution module.
The SCSI B cable from the SCSI backplane
board, if applicable
The DC power cable from the SCSI backplane board
Loosen the thumbscrew that secures the SCSI backplane board to the chassis
(see Figure 19).
Slide the SCSI backplane board up about 12.7 mm (0.5 inch), then pull the SCSI backplane board away, off its grounding tabs
(toward the back of the
system), and out of the system chassis (see Figure 19).
The strain-relief bracket prevents the deflection of cables connected to SCSI
expansion cards in your system. Deflection of these cables can damage the
expansion cards.
CAUTION: Read the safety instructions
in your System Information document.
CAUTION: If your system's operating system does not support hot-plug PCI or
PCI-X expansion cards or the expansion card itself does not support hot-plug
removal, turn off the system, including any attached peripherals, and disconnect
the system from its electrical outlet.
NOTICE: See "Protecting Against Electrostatic Discharge" in the safety instructions in your
System Information document.
Unlock and open the expansion-card access cover.
Press the switch next to the expansion card that you are removing and wait until the
LED turns off.
NOTE: Slot 1 is not a hot-pluggable connector.
Disconnect any cables connected to the card.
To release the expansion card, rotate the latch to the open position (see
Figure 22).
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-card 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.
If the card is a SCSI controller, remove any SCSI cables attached to connectors SCSI A
and B on the system board (see Figure 36). These cables are routed under the front
fan assembly.
CAUTION: Read the safety instructions
in your System Information document.
CAUTION: If your system's operating system does not support hot-plug PCI or
PCI-X expansion cards or the expansion card itself does not support hot-plug
installation, turn off the system, including any attached peripherals, and
disconnect the system from its electrical outlet.
Unlock and open the expansion-card access cover.
See the documentation that came with the expansion card for information on configuring the card, making internal connections, or otherwise customizing the card for your system.
NOTICE: See "Protecting Against Electrostatic Discharge" in the safety instructions in your
System Information document.
Rotate the expansion-card latch to the open position, and remove the filler bracket from the
expansion-card slot (see Figure 22).
If your system's operating system does not support hot-plug expansion cards, turn off
the system, including any attached peripherals, and disconnect the system from its
electrical outlet.
If your system's operating system does support hot-plug expansion cards, press the switch next to the expansion-card slot and wait until the LED turns off.
Position the expansion card so that the card-edge connector aligns with the
expansion-card connector on the system board.
Insert the card-edge connector firmly into the expansion-card connector until the
card is fully seated.
When the card is seated in the connector and the card-mounting bracket is aligned
with the brackets on either side of it, close the expansion-card latch.
Connect any cables that should be attached to the card.
See the documentation that came with the card for information about its cable connections.
NOTE: SCSI cables connected from an expansion card to the SCSI backplane board
should be routed under the front fan assembly.
NOTE: If there is an expansion card in the other expansion-card slot on that bus and the
expansion card that you are installing has a different operating speed, you must also power
down the expansion card that is already installed. This will ensure that both expansion cards
on that bus will power up at the slower operating speed.
Press the switch next to the expansion card that you installed and wait until the LED
turns green.
If you turned off your system in step 3 due to your system's operating system not supporting hot-plug expansion cards, close the expansion-card access cover, reconnect the system to its electrical outlet, including any attached peripherals, and turn on the system.
Grasp the memory riser card by the extractor tabs, located on the top corners of the
card, and lift it straight up to clear the chassis (see Figure 25).
The memory modules are contained on two memory riser cards. Each riser card has six memory module sockets. Between the two memory riser cards, the system can accommodate
from 512 MB to 12 GB of registered memory modules. The memory module sockets on each riser card are arranged in pairs (A and B) on three banks (1–3). Memory modules must be installed in at least one bank on each memory riser card for the system to operate. The memory modules should be installed starting with bank
1 and ending with bank 3 (see Figure 26). Each bank on each memory riser card must contain the same memory module size. For example, if bank 1 on one riser card contains 128-MB memory modules, bank 1 on the other riser card must also contain 128-MB memory modules.
To obtain the desired total memory for your system, you may need to install memory modules of different sizes. This is supported as long as the memory modules installed in each bank are the same size and the largest size is installed in bank 1. For example, if you wanted the total memory in your system to be 6 GB, each memory riser card configuration could be as follows:
The system is upgradable to 12 GB by installing combinations of 128-, 256-, 512-MB, and 1-GB registered memory modules. You can purchase memory upgrade kits as needed.
NOTE: The memory modules must be PC-1600
compliant (200 MHz).
Memory module sockets are arranged in pairs, labeled A and B on each memory
riser card. A pair of sockets on each memory riser card forms a single memory
bank. See Figure 26 to identify the sockets on a memory riser card.
When
you install memory modules, follow these guidelines:
You must install memory modules in matched sets of four, two in each memory riser
card.
Install a identical memory modules in sockets A and B for bank 1 before installing
memory modules in sockets bank 2.
NOTE: This table is a sample configuration of just one memory riser card. For the total desired
memory, you must configure both riser cards identically with the same memory module sizes.
Replace the system cover, reconnect the system to the electrical outlet, and turn on
the system.
After the system completes the POST routine, it runs a memory test.
The system detects that the new memory does not match the system configuration information, which is stored in NVRAM. The monitor displays an error message that ends with the following words:
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.
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 4 again, checking to make sure that the
memory modules are firmly seated in their sockets.
Locate the memory module sockets on each memory riser card in which you will install
a memory module (see Figure 26).
Press down and outward on the memory module socket ejectors, as shown in
Figure 27, to allow the memory module to be inserted into the socket.
Align the memory module's edge connector with the alignment key, and insert the
memory module in the socket (see Figure 27).
The memory module socket has an alignment key that allows 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 27).
When the memory module is properly seated in the socket, the memory module socket ejectors should align with the ejectors on the other sockets with memory modules installed.
Repeat steps 6 through 9 of this procedure to install the remaining memory modules.
To take advantage of future options in speed and functionality, you can add a second microprocessor or replace either the primary or secondary microprocessor.
NOTICE: The second microprocessor must be of the same type as the first. If the two
microprocessors are different speeds, both will operate at the speed of the slower
microprocessor.
Each microprocessor and its associated cache memory are contained in a PGA package that is installed in a ZIF socket on the system board. A second ZIF socket accommodates a secondary microprocessor.
In a single microprocessor system, the microprocessor must be installed in the PROCESSOR_1 socket.
The following items are included in the microprocessor upgrade kit:
Press down and pivot the securing clip latch to release the clips from the retaining tabs
on the ZIF socket (see Figure 28).
Remove the securing clips.
CAUTION: The microprocessor and heat sink can become extremely hot. Be sure
the microprocessor has had sufficient time to cool before handling.
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.
If the release lever on the microprocessor socket is not all the way up, move it to that
position now.
Align the gold triangle on the microprocessor (see Figure 30) with the triangle on
the microprocessor socket.
NOTE: Zero insertion force is needed to install the microprocessor. If the microprocessor is
aligned correctly, it should drop into the microprocessor socket.
Install the microprocessor in the socket (see Figure 31).
NOTICE: Positioning the microprocessor incorrectly can permanently damage the
microprocessor and the system when you turn on the system. When placing the microprocessor
in the socket, be sure that all of the pins on the microprocessor go into the corresponding holes.
Be careful not to bend the pins.
When the microprocessor is fully seated in the socket, rotate the socket release lever
back down until it snaps into place, securing the microprocessor.
Reconnect your system and peripherals to their electrical outlets, and turn on the
system.
Press <F2> to enter the System Setup program, and check that the PROCESSOR 1
and PROCESSOR 2 categories match the new system configuration.
As the system boots, it detects the presence of the new microprocessor and automatically changes the system configuration information in the System Setup program. If you installed a second microprocessor, the following message is displayed:
While grasping the system board tray handle, pull the system board
tray retaining pin (see Figure 33), and slide the tray out until the retaining pin locks
in the first position.
Disconnect the following cables:
Power distribution board power cables from system board connectors POWER 1,
POWER 2, and POWER 3 (see Figure 36)
The control panel cable from the control panel mounted on the front panel
The intrusion switch cable from the system board (see Figure
36)
The interposer cable from the interposer board on the diskette/CD drives
Any cables from the peripheral bay, if applicable
Any cables connected to the system board connectors SCSI A, SCSI B, and
BACKPLANE (see Figure 36)
While grasping the system board tray handle, pull the system board
tray retaining pin (see Figure 33), and slide the tray out until the retaining pin locks
in the second position.
While grasping the system board tray handle, pull the system board
tray retaining pin, and slide the tray out until it clears the chassis (see Figure 34).
While grasping the system board tray handle, align the system board tray
with the tray rails inside the chassis, and slide the tray in until the
retaining pin locks in to position (see Figure 34).
The integrated RAID option adds three components to the system board: a RAID
hardware key, a RAID memory module, and a RAID memory backup battery module, located
beneath the system board. You must turn off the system power and disconnect
the power cords before replacing any of these three components.
CAUTION: Read the safety instructions
in your System Information document.
NOTICE: See "Protecting Against Electrostatic Discharge" in the safety instructions in your
System Information document.
NOTICE: To avoid possible data loss, back up all data on the hard drives before changing the
mode of operation of the integrated SCSI controller from SCSI to RAID.
Push the ejectors on the RAID_DIMM memory module socket down and outward, as
shown in Figure 37, to allow the memory module to be inserted into the socket.
See Figure 36 for the location of the RAID memory module connector.
Align the memory module's edge connector with the alignment keys, and insert the
memory module in the socket (see Figure 37).
The memory module socket has two alignment keys that allow the memory module to be installed in the socket in only one way.
NOTE: The RAID controller memory module must be an unbuffered memory module, rated
to run at 100 MHz or faster. Do not substitute registered memory modules such as those
used for system memory.
Press 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.
Insert the RAID hardware key into its socket on the system board (see
Figure 36) and
secure the key with the latches on each end of the socket (see Figure 38).
Hook the front edge of the battery assembly onto the slot in the bay, and then snap the
back edge of the battery assembly into place so that the battery lies flat (see Figure 39).
CAUTION: Read the safety instructions
in your System Information document.
CAUTION: Avoid
touching the cable connectors on the power-supply distribution board. Wait 10 to 20 seconds after
disconnecting the power cord before removing the power supply or coming into contact
with the PSDB components or connectors.
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
If the date and time are not correct in the System Setup program, replace the battery.
NOTE: 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.
NOTE: 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-volt (V), coin-cell CR2032-type
battery.
CAUTION: Read the safety instructions
in your System Information document.
CAUTION: Before you perform this procedure, you must turn off the system and disconnect it
from its power sources. For more information, see the safety precautions in your
System Information document.
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.
NOTICE: To avoid damage to the battery connector, you must firmly
support the connector when installing or removing a battery.
Remove the battery (see Figure 36 for the battery location).
Support the battery connector by holding it firmly on the
positive side (see Figure 41). While pressing
the battery toward the positive end of the connector, pull the securing tabs on
the negative side outward slightly and pivot the battery up and out of the
connector.
Reconnect the system to the electrical outlet and turn on the system, including any
attached peripherals.
Enter the System Setup program
to confirm that the battery is operating properly.
In the System Setup program, enter the correct time and date and re-enter
any system configuration information that is no longer displayed on
the System Setup screens, and then exit the System Setup program.
To test the newly installed battery, power down and
disconnect the system from the electrical outlet for at least an hour.
After an hour, connect the system to an electrical outlet and turn on the power.
