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devices, their configuration requirements are different. For details

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www.dell.com | support.dell.com SCSI devices installed by Dell are configured correctly during the manufacturing process. You do not need to set the SCSI ID for these SCSI devices. If you attach additional optional SCSI devices, refer to the documentation for each device for information about setting the appropriate SCSI ID number. NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dell computers. Device Termination SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all devices in between. Dell recommends that you use terminated cables and that you disable termination on all devices. See the documentation provided with any optional SCSI device you purchase for information on disabling termination on the device. General Guidelines Follow these general guidelines when installing SCSI devices in your computer: • Although you install SCSI devices essentially the same way as other devices, their configuration requirements are different. For details on configuring your particular SCSI subsystem, refer to the documentation for your SCSI devices and/or your host adapter card. • Configure the device for a SCSI ID number and disable termination, if necessary. • To use an external SCSI device, you must have a SCSI controller card installed in your computer. Connect one end of the external SCSI cable to the connector on the back of the SCSI device. Attach the other end of the external SCSI cable to the connector on the controller card installed in the computer. 76

Section	Page
Service Manual	1
Notes, Notices, and Cautions	2
Contents	3
Before You Begin	7
Safety First—For You and Your Computer	9
When Working Inside Your Computer	9
1 Turn off the computer and any peripherals.	9
2 Wear a wrist grounding strap, and clip it to an unpainted metal surface, such as the padlock lo...	9
3 Disconnect your computer and peripherals from their power sources.	9
Protecting Against Electrostatic Discharge	11
2	13
SECTION 2	13
Removing and Installing Parts	13
Computer Cover	15
Opening the Computer Cover	15
1 Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 t...	15
2 If you have installed a padlock through the padlock ring on the rear panel, remove the padlock.	15
3 Lay the computer on its right side.	15
4 Open the computer cover:	15
a Slide the cover release latch toward the top of the computer (see the following figure).	15
b Raise the back of the cover, and pivot it toward the front of the computer.	15
Opening the Computer Cover	16
Closing the Computer Cover	16
1 Check all cable connections, especially those that might have come loose during your work. Fold...	16
2 Ensure that no tools or extra parts (including screws) are left inside the computer.	16
3 Close the computer cover by pivoting the cover down toward the back of the chassis and into pos...	16
Closing the Computer Cover	17
4 Stand the computer upright.	17
5 If you are using a padlock to secure your computer, reinstall the padlock.	17
Interior Service Label	19
Interior Service Label	19
Inside Your Computer	21
Inside the Computer	21
System Board Components	23
Components	23
System Board Components	24
Labels	25
System Board Labels	25
Jumpers	26
System Board Jumpers	26
System-Board Jumper Settings	27
Drive Door	29
Removing the Drive Door	29
1 Open the drive door to a 90-degree angle (see the following figure).	29
Opening the Drive Door	29
2 Unsnap the top hinge, and pull the top of the drive door outward, away from the chassis.	29
Removing the Drive Door	30
3 Lift the bottom hinge off of the chassis.	30
Replacing the Drive Door	30
Front Panel	31
Removing the Front Panel	31
1 Turn off the computer and devices, disconnect them from their electrical outlets, wait at least...	31
2 Disconnect and remove all disk drives from the chassis drive bay.	31
3 Release the front panel by pressing each of the seven front-panel release buttons (see the foll...	31
Removing the Front Panel	32
4 Close the computer cover halfway and rotate the top of the panel outward, away from the chassis.	32
5 Pull the panel downward, away from the chassis.	32
Replacing the Front Panel	32
Front-Panel Inserts	33
Removing Front-Panel Inserts	33
1 Turn off the computer and devices, disconnect them from their electrical outlets, wait at least...	33
2 Disconnect and remove any disk drives from the chassis drive bay that obstruct your access to t...	33
3 Remove the front-panel insert for the chassis drive bay you want to use.	33
a Open the externally accessible drive door.	33
b Use your thumb to press the center of the insert until it snaps free through the front of the f...	33
Removing Front-Panel Inserts	34
Replacing Front-Panel Inserts	34
1 Connect and replace any disk drives you removed from the chassis drive bay.	34
2 Close the computer cover and stand the computer upright.	34
3 Replace the front-panel insert.	34
a Facing the front panel, open the drive door.	34
b Insert the left securing tab into the drive bay.	34
c Press the right securing tab into the drive bay until the panel snaps into place.	34
Front-Panel Button	35
Removing the Front-Panel Button	35
1 Turn off the computer and devices, disconnect them from their electrical outlets, wait at least...	35
2 Remove the front panel.	35
3 Lay the front panel down with the inside of the panel facing up.	35
4 Use a small screwdriver to push in the two plastic clips that secure the power button to the co...	35
Removing the Front-Panel Button	36
Replacing the Front-Panel Button	37
Dell Shield	39
Removing the Dell Shield	39
1 Turn off the computer and devices, disconnect them from their electrical outlets, wait at least...	39
2 Remove the front panel.	39
3 Lay the front panel down with the inside of the panel facing up.	39
4 Use a Phillips screwdriver to unscrew the shield from the inside of the front panel.	39
5 Pull the shield down and push it away from you, through the front of the front panel.	39
Removing the Dell Shield	39
Replacing the Dell Shield	40
Power Supply	41
Removing the Power Supply	41
1 Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 t...	41
2 Remove the expansion cards.	41
3 Remove the expansion-card cooling fan and guide.	41
4 Disconnect the power supply cables and the expansion-card cooling fan cable from the system boa...	41
Removing the Plastic Cable Retainer	42
5 Remove the cable retainer.	42
a Pull up on the cable retainer release button.	42
b Slide the cable retainer to the right.	42
c Lift the cable retainer out of the four securing slots in the chassis.	42
6 While pressing the power supply release button, slide the power supply toward the back of the c...	43
7 Lift the power supply away from the chassis (see the following figure).	43
8 Slide the power supply cables out of the chassis through the hole.	43
Removing the Power Supply	43
Replacing the Power Supply	43
1 Slide the power supply cables through the hole into the chassis.	43
2 Insert the power supply securing tab into the power supply securing slot on the chassis. Ensure...	43
3 Slide the power supply toward the front of the computer. See \	43
4 Install the cable retainer.	43
a Place the cable retainer into the four securing slots in the chassis.	44
b Slide the cable retainer to the left until it locks into place.	44
5 Connect the power supply cables and the expansion-card cooling fan cable to the system board, a...	44
6 Replace the expansion-card cooling fan and guide.	44
7 Install the expansion cards.	44
8 Close the computer cover and restart the computer.	44
Computer Memory	45
Memory Module Label	45
System Board Memory Components	46
Memory Riser Board Components	47
System Memory Installation Guidelines	47
System Board Installation	47
Riser Board Installation	48
Removing a Memory Module	48
1 Press the securing clips at each end of the memory socket outward simultaneously until the modu...	49
2 Lift the module away from the socket.	49
Removing a Memory Module	49
Installing a Memory Module	49
1 Press the securing clips at each end of the socket outward until they snap open (see the follow...	49
2 Align the slots on the bottom of the module with the ridges inside the socket.	49
3 Press the module straight down into the socket until the securing clips snap into place at the ...	49
Installing a Memory Module	50
Removing Memory Riser Boards	50
1 Remove the microprocessor airflow shroud.	50
2 Remove the memory riser board retention bracket (see the following figure).	50
a Lift the retention bracket up to disengage it from the chassis.	50
b Lift the bracket away from the chassis.	50
3 Remove memory riser board A:	50
a Press the securing clips of system board memory socket 1 outward simultaneously until riser boa...	50
b Lift riser board A away from the retention brackets on riser board B.	51
4 Remove memory riser board B:	51
a Press the securing clips of system board memory socket B outward simultaneously until riser boa...	51
b Lift riser board B away from socket 2.	51
Removing Memory Riser Boards	52
Installing Memory Riser Boards	53
1 If any RIMMs occupy memory sockets on the system board, remove those modules.	53
2 Install memory riser board B (see the following figure):	53
a Align the slots on the bottom of riser board B with the ridges inside memory socket 2 on the sy...	53
b Press riser board B straight down into socket 2 until the securing clips snap into place at the...	53
3 Install memory riser board A:	53
a Align the edges of riser board A with the retention brackets on riser board B.	53
b Align the slots on the bottom of riser board A with the ridges inside memory socket 1 on the sy...	53
c Press riser board A straight down into socket 1 until the securing clips snap into place at the...	53
4 Install the memory riser board retention bracket:	53
a Lower the bracket to the chassis so that the two bracket tabs insert into the chassis slots.	53
b Press the bracket straight down until it is secured in the chassis.	53
Installing Memory Riser Boards	54
Disk Drives and Media	55
Drive Types	56
Installing a CD, Zip, or Other Externally Accessible Drive	57
1 Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 t...	57
2 If you are replacing a drive that is already installed in the computer, continue with step 3. I...	57
3 Disconnect the DC power cable and interface cable from the back of the drive you are replacing.	57
4 Remove the drive from the chassis drive bay.	57
a Squeeze together the tabs at each side of the drive to disengage the drive bracket from the cha...	57
b Slide the drive bracket upward, and remove it from the chassis (see the following figures).	57
Removing an Externally Accessible Drive	58
Removing the Diskette Drive	59
5 Unpack the replacement drive and prepare it for installation.	59
6 If the replacement drive does not have bracket rails attached, remove the rails from the old dr...	59
Attaching Bracket Rails for an Externally Accessible Drive	60
7 Slide the drive/bracket assembly into the drive bay until both drive bracket tabs snap securely...	60
Installing an Externally Accessible Drive	61
Installing the Diskette Drive	62
8 If you are installing a drive that has its own controller card, install the controller card in ...	62
9 Connect the cables to the drive. See \	62
10 Connect the interface cable(s) to the system board or a controller card, depending on the type...	63
Attaching Cables for an Externally Accessible Drive	64
Attaching Cables for the Diskette Drive	65
11 Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for...	65
12 If the drive bay was previously empty, remove the corresponding insert from the front panel.	65
13 Close the computer cover.	66
14 Stand the computer upright.	66
15 Reconnect the computer and devices to their electrical outlets, and turn them on.	66
16 Enter system setup and update your drive configuration information:	66
17 If you installed a hard drive, partition and logically format the drive before proceeding to t...	66
18 Test the drive to verify that it is operating properly.	66
Installing a Hard Drive	67
1 Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 t...	67
2 If you are replacing a drive that is already installed in the computer, continue with step 3. I...	67
3 Disconnect the DC power cable and interface cable from the back of the drive you are replacing.	67
4 Remove the drive from the chassis drive bay.	67
a Squeeze together the tabs at each side of the drive to disengage the drive bracket from the cha...	67
b Slide the drive bracket upward, and remove it from the chassis (see the following figure).	67
Removing a Hard Drive	68
5 Unpack the replacement drive and prepare it for installation.	68
6 If the replacement drive does not have bracket rails attached, remove the rails from the old dr...	68
Attaching Bracket Rails for a Hard Drive	69
7 Slide the drive/bracket assembly into the drive bay until both drive bracket tabs snap securely...	69
Installing a Hard Drive	70
8 If you are installing a drive that has its own controller card, install the controller card in ...	70
9 Connect the cables to the drive. See \	70
10 Connect the interface cable(s) to the system board or a controller card, depending on the type...	71
Attaching Cables for a Hard Drive	72
11 Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for...	72
12 If the drive bay was previously empty, remove the corresponding insert from the front panel.	72
13 Close the computer cover.	73
14 Stand the computer upright.	73
15 Reconnect the computer and devices to their electrical outlets, and turn them on.	73
16 Enter system setup and reset the Chassis Intrusion option as described in your User’s Guide, a...	73
17 Partition and logically format the drive before proceeding to the next step.	73
18 Run the Dell Diagnostics to test the drive.	73
19 If the hard drive you installed is the primary drive, install the operating system on the drive.	73
EIDE Device Installation Guidelines	74
Jumper Settings	74
General Guidelines	74
EIDE Cables	74
SCSI Device Installation Guidelines	75
SCSI ID Numbers	75
Default SCSI ID Settings	75
Expansion-Card Airflow Shroud	79
Expansion Cards	81
Expansion-Card Cooling Fan and Guide	89
Control Panel	93
I/O Panel	97
Chassis Intrusion Switch	99
Speaker	101
Microprocessor Airflow Shroud	103
Microprocessor	107
Microprocessor Cooling Fan	113
VRM	115
Computer Battery	119