Intergraph TDZ 2000 Reference
TDZ 2000
System Reference
February 1998
DHA023820
Copyright
1998 Intergraph Computer Systems. All rights reserved. This document contains information protected by copyright, trade secret, and
trademark law. This document may not, in whole or in part, be reproduced in any form or by any means, or be used to make any
derivative work, without written consent from Intergraph Computer Systems.
Use, duplication, or disclosure by the United States Government is subject to restrictions as set forth in subdivision (c)(1)(ii) of the rights in
technical data and computer software clause at DFARS 252.227-7013. Unpublished rights are reserved under the copyright laws of the
United States.
Intergraph Computer Systems, Huntsville AL 35894-0001
Notice
Information in this document is subject to change without notice and should not be considered a commitment by Intergraph Computer
Systems. Intergraph Computer Systems shall not be liable for technical or editorial errors in, or omissions from, this document. Intergraph
Computer Systems shall not be liable for incidental or consequential damages resulting from the furnishing or use of this document.
All warranties given by Intergraph Computer Systems about equipment or software are set forth in your purchase contract. Nothing stated
in, or implied by, this document or its contents shall be considered or deemed a modification or amendment of such warrantites.
Trademarks
Intergraph Computer Systems and the Intergraph Computer Systems logo are registered trademarks of Intergraph Computer Systems.
Other brands and product names are trademarks of their respective owners.
Warnings
The service and upgrade instructions should be performed by qualified personnel only. Qualified personel do not have to be Intergraph
service personnel. Those who are familiar with servicing computers can follow instructions in a manual to service equipment, and do so
without harm to themselves or damage to the equipment.
To reduce the risk of electrical shock, do not attempt to open the equipment unless instructed. Do not use a tool for purposes other than
instructed.
There is a danger of explosion if the battery is incorrectly replaced. Replace the battery only with the same or equivalent type as
recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.
There are no user serviceable parts within the power supply. In the event of failure, the power supply must be replaced by qualified service
personnel. Use Intergraph power supplies only.
Changes or modifications made to the system that are not approved by the party responsible for compliance could void the user’s authority
to operate the equipment.
Notes
Read all safety and operating instructions before using the equipment. Keep these instructions for future reference. Follow all warnings on
the equipment or in the operating instructions.
This device is designed and manufactured to comply with approved safety standards for information processing and business equipment.
Contents
Introduction............................................................................................................... vii
Document Conventions............................................................................................... vii
Additional System Information ................................................................................... vii
1 Accessing the System................................................................................................1
Tools .............................................................................................................................2
Protecting Against Electrostatic Discharge.....................................................................2
Opening and Closing the Case .......................................................................................2
Access ing Components Be hind the Power Supply..............................................................4
2 Servicing the System................................................................................................7
System Illustrations........................................................................................................8
Case Components ........................................................................................................11
Peripheral Drives.........................................................................................................15
Floppy Disk Drive.......................................................................................... 15
CD-ROM Drive..............................................................................................16
External Bay Disk Drives............................................................................... 17
Internal Bay Disk Drives................................................................................18
External SCSI Terminator ...........................................................................................20
Power Supply...............................................................................................................21
Bus Termination Card .................................................................................................23
Processor Module.........................................................................................................23
Voltage Regulator Module (VRM)...............................................................................24
DIMMs........................................................................................................................25
System Board...............................................................................................................25
Expansion Cards.......................................................................................................... 27
Fans.............................................................................................................................27
Chassis Intrusion Alarm Switch ...................................................................................29
Lithium (CMOS/Clock) Battery................................................................................... 30
LEDs, Light Pipe, and Standby Switch......................................................................... 30
iii
3 Upgrading the System............................................................................................33
Adding Memory...........................................................................................................34
Adding a Processor......................................................................................................36
Single-to-Dual Upgrade..................................................................................36
Adding Expansion Cards .............................................................................................37
Slot Locations................................................................................................38
Upgrading Graphics Cards .............................................................................39
Installing Expansion Cards ............................................................................40
Assigning System Resources.......................................................................... 40
Adding Internal SCSI Drives .......................................................................................41
Device Locations............................................................................................41
iv
Installing Devices in the Drive Bays...............................................................43
Adding External SCSI Drives ......................................................................................46
SCSI Cable Length Guidelines.......................................................................47
SCSI Cable Quality Guidelines.......................................................................47
SCSI ID Guidelines........................................................................................47
SCSI Termination Guidelines for External Devices ........................................48
Connecting the Device ................................................................................... 48
Changing SCSI Host Adapter or Device Settings............................................48
4 System Hardware Overview and Specifications....................................................49
System Configuration Summary...................................................................................50
System Board...............................................................................................................51
Hardware Monitoring and Power Management ............................................................51
Intrusion Alert Switch....................................................................................52
Temperature Sensors...................................................................................... 53
System Model Number.................................................................................................53
Specifications...............................................................................................................54
Optional Hardware.......................................................................................................54
5 System Board ..........................................................................................................55
Slots and Sockets.........................................................................................................56
Cable Routing and Pinouts...........................................................................................57
Jumper Connectors ......................................................................................................62
External Ports ..............................................................................................................64
Sound Controller .........................................................................................................72
Configuration Data ......................................................................................................73
DMA Channels ..............................................................................................73
Input/Output Addresses..................................................................................73
Memory Address Map....................................................................................73
PCI to ISA Bus Interrupt Mapping .................................................................74
Interrupt Requests (IRQs)...............................................................................75
6 Peripherals..............................................................................................................77
Peripheral Cables.........................................................................................................78
Internal Wide Ultra SCSI Cable (MCBL254A) Connection Locations............78
Internal Ultra SCSI Cable (MCBL253A) Connection Locations .....................78
External Wide Ultra SCSI Cable (MCBL255A) Connection Locations...........79
EIDE Cable (MCBL252A) Connection Locations...........................................79
Floppy Cable (MCBL067A) Connection Locations.........................................80
Peripheral Configuration..............................................................................................80
EIDE CD-ROM Drive (CDSK177).................................................................80
SCSI CD Recorder (CDSK133)......................................................................81
Iomega Jaz 1 GB SCSI Internal Drive (CDSK168).........................................82
40 GB 8MM Tape Drive (CMTP169).............................................................83
Floppy Disk Drive (CDSK146).......................................................................84
4.3 GB and 9.1 GB Disk Drives (CDSK166, CDSK167) ................................ 84
7 Power Supply and Cooling Fans............................................................................. 87
Power Supply...............................................................................................................88
Cable Connectors...........................................................................................89
P1 Pinout .......................................................................................................89
P2 Pinout .......................................................................................................90
P3 and P5 - P9 Pinout ....................................................................................90
P4 Pinout .......................................................................................................90
Cooling Fans ...............................................................................................................91
Dynamic Fan Speed Control...........................................................................92
Index...........................................................................................................................93
v
vi
Introduction
This System Reference provides information necessary to service and upgrade a TDZ 2000.
For reference information on the TowerMate expansion base, see the TowerMate Expansion
Base Installation and Use guide, included with the TowerMate.
Document Conventions
vii
Bold
Commands, words, or characters that you key in literally.
Italic Variable values that you supply, or cross-references.
Monospace
SMALL CAPS Key names on the keyboard, such as D, ALT or F3. Names of files and
Output displayed on the screen.
directories. You can type filenames and directory names in the dialog boxes
or the command line in lowercase unless directed otherwise.
CTRL+D Press a key while simultaneously pressing another key; for example, press
CTRL and D simultaneously.
Additional System Information
A System Setup document is shipped with each system, and provides detailed information
about the following:
u
Setting up the system hardware.
u
Configuring the operating system and associated system software.
u
Using the system.
u
Using the AMIBIOS Setup program.
u
Reinstalling system software.
An online System Introduction is delivered with the system, and provides information about
the following:
u
Intergraph Computer Systems support.
u
System hardware features.
u
Basic system controls.
u
Available hardware options.
viii
1 A ccessing the System
This chapter lists hand tools and describes servicing restrictions, methods for avoiding
electrostatic discharge, and how to remove and attach cover panels.
This system features a new, extensible chassis architecture designed for ease of upgrades and
expansion. The design provides easy access to PCI and ISA card slots, memory, processors,
and power supply.
Tools .............................................................................................................................2
Protecting Against Electrostatic Discharge.....................................................................2
Opening and Closing the Case .......................................................................................2
Access ing Components Be hind the Power Supply..............................................................4
1
2
Tools
You will need the following tools to service the system:
u
Antistatic wrist strap
u
Antistatic mat connected to an earth ground
u
Quarter-inch nutdriver
u
No. 1 and No. 2 Phillips screwdrivers
u
Small or medium flat-blade standard screwdriver
NOTE You do not need any tools to open the TDZ 2000 case.
NOTE “Right side” and “left side” are as seen from the front of the unit.
CAUTION Follow all warnings and cautions in the servicing instructions. If you fail to follow
documented, approved procedures, personal injury and damage to equipment can result.
CAUTION Use an antistatic wrist strap for all servicing procedures to avoid the possibility of
electrostatic discharge.
Protecting Against Electrostatic Discharge
Electrostatic discharge (ESD) can damage sensitive components inside the unit. Take the
following precautions when working with internal components:
u
Unplug the unit from AC power before servicing any electronic component inside the
chassis. Remember that the TDZ 2000 is always on when connected to AC power.
u
Touch the bare metal of the chassis to ensure the chassis and your body are at the same
electric potential.
u
Attach the antistatic wrist strap to its connector on the antistatic mat. Ensure that the
metal conductor bead in the elastic sleeve of the antistatic strap contacts bare skin.
u
Handle all printed circuit boards as little as possible and by the edges only.
u
Leave new parts in their protective packaging until you install them.
Opening and Closing the Case
Opening the system for service or upgrades consists of two simple steps. Remove the top
cover first, then remove the left side panel. No tools are needed. You need only remove the
top cover and left side panel for most routine service procedures. See Chapter 2, “Servicing
the System,” for additional details on removing and replacing case components.
CAUTION Do not use the bottom portion of the face panel or the lip at the top, rear of the unit as a hand
hold when moving the system. Equipment damage and personal injury can result.
The left side panel has a tab that closes an interlock switch inside the power supply. When
you take off the left side panel, the safety interlock removes AC power to the system.
WARNING Do not attempt to defeat the safety interlock and run the system with the left side
panel removed. Personal injury and equipment damage can result.
CAUTION Before you open the case, shut down the system and turn off power to the system and
external devices (including peripheral drives and display). Use caution to avoid injury when
lifting the computer or removing covers and other hardware.
NOTE Removing the right side panel is necessary only for servicing internal bay disk drives, the
plastic cowling on the right panel, or the face panel.
To open the case:
1. Ensure the system is shut down and that you have disconnected the system and any
attached external devices from AC power.
3
2. Grasp the lip on the top cover at the rear of the system and press up on the release. See
the following figure.
3. Keep pressing the release, slide the top cover back until it stops, remove it from the
chassis, and set it aside.
Press up on release located under lip
4
4. Grasp the cowling at the bottom of the left side panel and lift.
5. Slide the left side panel back until it stops, remove it from the chassis, and set it aside.
6. Repeat steps 4 and 5 to remove the right side panel, if necessary.
To close the case:
1. Place the side panel on the chassis so that all tabs on the rear of the chassis insert into
their slots.
NOTE When installing the left side panel, ensure that the security tab aligns with its corresponding
slot on the panel.
2. Push the side panel toward the front of the chassis, then push down to seat the panel.
3. Repeat steps 1 and 2 to install the remaining side panel, if necessary.
4. Place the top cover on the chassis so that all tabs are inserted into their slots.
5. Slide the top cover forward until it locks into place.
CAUTION After servicing or upgrading the system, always replace the covers that were removed. Do
not defeat the AC interlock. The covers ensure the system maintains proper air flow, so
internal components do not overheat and fail. The covers also ensure that electromagnetic
interference (EMI) emissions remain below the standard requirements.
Accessing Component s Behind the Power Supply
To access the processors and DIMMs, remove the knurled retaining/grounding screw on the
rear of the chassis, disengage the locking plungers, and swing the hinged power supply out
of the chassis. Or, you can remove the power supply entirely. However, you need not
remove the power supply for most routine service or upgrade tasks. As needed, you may
want to disconnect power supply cables to peripheral devices to swing the power supply out
fully.
See Chapter 2, “Servicing the System,” for complete details on removing the power supply.
To access components behind the power supply:
1. Unplug the AC power cord from the rear of the unit.
2. Remove the top cover and left side panel. See the previous section for details.
3. Remove the knurled retaining/grounding screw just below the top system fan on the rear
of the chassis.
4. Grasp both knurled plungers on the power supply, pull them toward each other, and
then swing the power supply toward you.
Top plunger
Bottom plunger
NOTE Disconnect power cables to internal devices as needed to allow the power supply to swing out
fully.
5
5. Access the exposed components as needed.
To stow the power supply:
1. Reconnect any power cables that you disconnected.
2. Grasp both knurled plungers, pull them toward each other, and then swing the power
supply away from you, back into the chassis.
CAUTION Carefully swing the power supply back into the chassis. Avoid pinching cables. Hold the
external SCSI cable against the chassis brace or rearrange cables slightly while swinging the
power supply into the chassis.
3. Align the plunger holes and release both plungers.
4. Install the retaining/grounding screw on the rear panel.
5. Install the left side panel and top cover.
6. Plug the AC power cord into its connector on the rear of the chassis.
6
2 Servicing the System
This chapter describes how to replace the standard parts within the system. Obey all
warning and caution labels while replacing parts.
Note that internal parts servicing procedures assume you have removed the left side panel
from the system. After you have finished servicing the system, replace panels as described in
Chapter 1, “Accessing the System.”
System Illustrations........................................................................................................8
Case Components ........................................................................................................11
Peripheral Drives.........................................................................................................15
Floppy Disk Drive.......................................................................................... 15
CD-ROM Drive..............................................................................................16
External Bay Disk Drives............................................................................... 17
Internal Bay Disk Drives................................................................................18
External SCSI Terminator ...........................................................................................20
Power Supply...............................................................................................................21
Bus Termination Card .................................................................................................23
Processor Module.........................................................................................................23
Voltage Regulator Module (VRM)...............................................................................24
DIMMs........................................................................................................................25
System Board...............................................................................................................25
Expansion Cards.......................................................................................................... 27
Fans.............................................................................................................................27
Chassis Intrusion Alarm Switch ...................................................................................29
Lithium (CMOS/Clock) Battery................................................................................... 30
LEDs, Light Pipe, and Standby Switch......................................................................... 30
7
8
System Illustrations
The illustrations show various external and internal views of the system. The front, right
view below depicts the system with all covers in place.
The front, left view below depicts the major parts of the system. Covers, cables, system
board and expansion cards are not shown.
9
10
The back, left view below depicts the chassis with all major components removed.
Case Components
Ordinarily you will not need to replace any of the external case components unless they are
broken or cosmetically damaged. All case components are designed for durability, but the
item that may require replacement first is the door and hinge assembly.
WARNING Disconnect the system from AC power before servicing internal components! Failure
to remove AC power may result in equipment damage or personal injury.
NOTE See Chapter 1, “Accessing the System,” for instructions on opening the system and
protecting against electrostatic discharge.
CAUTION Follow all warnings and cautions in servicing instructions. If you fail to follow documented,
approved procedures, personal injury or damage to equipment can result.
CAUTION Use an antistatic wrist strap for all servicing procedures to avoid the possibility of
electrostatic discharge.
CAUTION Do not overtighten screws and other fasteners to avoid damaging threads.
To replace the hinge or door, you must first remove the top cover. To replace the face panel,
you must remove the top cover and the door.
11
To replace the top cover:
1. Remove the top cover. See Chapter 1, “Accessing the System,” for details.
2. Install the new cover.
To replace the door assembly:
1. Remove the top cover. See Chapter 1, “Accessing the System,” for details.
2. Lift the door and hold it at a 90-degree angle from the face panel.
3. Insert a small flat-blade screwdriver between the door and hinge, near one of the square
holes on the underside of the door.
12
Guide slot (1 per side)
Door
Locking tabs
Stop tabs
Hinge
Stop tabs
4. Pull the door toward you and pry the hinge and door apart until one side of the door
releases from its locking tab.
5. Repeat steps 3 and 4 for the other side of the door hinge.
6. Remove the door.
7. Do both of the following on the underside of the door:
−
Spread the release tabs on the large emblem and remove it
−
Squeeze the release tabs on the small emblem and remove it
8. Slide the hinge toward the front of the chassis until it stops.
9. Use a flat-blade screwdriver and pry each of the stop tabs on the hinge until the hinge
releases from the rails.
10. Orient the new hinge so that the locking tabs face down and insert the new hinge into
the track and push it forward until it stops.
11. Hold the hinge, align the beveled edges of the hinge with the guide slots on the door,
and push the door firmly onto the hinge until it snaps into place.
12. Press the two emblems onto the door until they snap into place.
13. Operate the door to test its movement.
14. Install the top cover. See Chapter 1, “Accessing the System,” for details.
To replace the hinge rails:
1. Remove the door. See the procedure above for details.
2. Slide the hinge toward the front of the chassis until it stops.
3. Use a flat-blade screwdriver and pry each of the stop tabs on the hinge until the hinge
releases from the rails.
Hinge rails
4. Remove the hinge from the rail.
5. Press a hinge rail toward the middle of the chassis until all four tabs release.
6. Lift the hinge rail off the chassis.
7. Orient the new hinge rail the same way as the one you removed, place the tabs in the
slots, and press outward until the rail snaps into place.
13
8. From the front of the chassis, slide the hinge into the rails.
To replace the face panel:
1. Remove the top cover and both side panels. See Chapter 1, “Accessing the System,” for
details.
2. Remove the door. See the “To replace the door assembly” procedure above for details.
3. Push the hinge back, away from the front of the chassis.
4. Use a flat-blade screwdriver to gently pry and release each of the plastic tabs on both
sides of the chassis. The tabs on the right side of the chassis are recessed. First release
the bottom tabs, release the middle tabs, and then release the top tabs.
CAUTION Release the tabs with care. Do not apply more pressure than necessary.
14
Tab
(3 per side)
Light pipe gui des
Standoff pos t s
(4 per si d e)
Tab
(3 per side)
Standb y sw i tch
5. Pull the face panel away from the chassis slightly to ensure all tabs are released.
6. Grasp the left side of the face panel and pivot it left to expose the standby switch and
cable.
7. Spread the switch mount locking tabs, grasp the switch, and pull the switch out of its
mount.
8. Turn the face panel downward until the standby switch button drops out.
9. Place the left side of the new face panel near the left, front of the chassis and orient the
switch so that the black and green wires are at the bottom.
10. Push the standby switch into the mount until it snaps into place.
11. Place the standby switch button into its hole and push firmly until it seats.
12. Align the new face panel with the tab notches and light pipe guides, and carefully push
the panel onto the chassis until all tabs engage.
13. Install the door, left and right side panels, and top cover.
To replace the left or right side plastic cowling:
1. Remove the top cover, then remove the side panel that has the plastic you want to
replace. See Chapter 1, “Accessing the System,” for details.
2. Place the side panel, with the cowling side down, on a flat, padded surface.
3. Remove the screw that secures the plastic to the side panel.
4. Grasp one side of the panel, press the release tabs, and lift the panel off the plastic.
5. Turn the side panel over and press the new plastic onto the panel until the release tabs
engage.
6. Turn the side panel over and install the screw.
7. Install the side panel onto the chassis.
8. Install the top cover. See Chapter 1, “Accessing the System,” for details.
Peripheral Drives
This section explains how to replace the floppy, CD-ROM, and internal and external bay
disk drives. See Chapter 6, “Peripherals,” for details on drive configuration and cables.
Floppy Disk Drive
To replace the floppy disk drive:
1. Disconnect the power cable and data cable from the drive. Note the position of the red
stripe on the data cable.
15
2. Remove the two screws that secure the floppy drive to the chassis. See the following
figure.
CD-ROM mounting
screws
Floppy drive mounting
screws
16
3. From inside the chassis, push the back of the floppy drive until the bezel clears the
chassis, and slide the device out.
4. Slide the new floppy drive into the chassis and align the mounting holes.
5. Install the two mounting screws.
6. Connect the data cable and the power cable.
CD-ROM Drive
The procedure for replacing a SCSI or an EIDE CD-ROM drive is the same, except for data
cables and jumper settings.
To replace the CD-ROM drive:
1. Disconnect the power cable, data cable, and audio cable from the CD-ROM drive.
2. Remove the screws that secure the CD-ROM drive to the chassis. See the previous
figure.
3. From inside the chassis, push the back of the CD-ROM until the bezel clears the chassis,
then slide the device out.
4. Remove the mounting guide from the right side of the CD-ROM. See the following
figure.
Mounting guide
5. Note the jumper settings on the rear of the CD-ROM.
6. Do one of the following on the new CD-ROM:
−
Set the EIDE master/slave jumper to the same position (Master) as the old drive if
you are installing an EIDE drive
−
Set the SCSI ID jumper to the same address as the old drive if you are installing a
SCSI drive
7. Install the mounting guide on the right side of the new CD-ROM.
8. Slide the new CD-ROM drive into the chassis and align the mounting holes.
9. Install the screws that secure the CD-ROM to the chassis.
10. Connect the audio cable, data cable, and power cable.
External Bay Disk Drives
If a Kingston or other brand of removable disk module is installed in the external bay, see
the vendor documentation for disk drive and module replacement instructions.
To replace an external bay disk drive:
1. Disconnect the SCSI cable and power cable from the disk drive.
2. Remove the two screws that secure the external bay disk drive tray to the chassis. See
the following figure.
17
External bay mounting screws
3. From inside the chassis, push the tray out of the external bay, grasp the front of the tray,
and then slide it out of the bay.
4. Remove the screws that secure the disk drive to the tray and remove the drive.
5. Do all of the following:
−
Note the SCSI ID jumper settings on the old drive
−
Set the SCSI ID on the new drive to the same ID as the old drive
18
−
Disable termination on the new drive
See Chapter 6, “Peripherals,” for details on these tasks.
6. Place the disk drive in the tray, align the mounting holes, and install the mounting
screws that secure the disk drive to the tray. See the following figure.
Mounti ng guide
Drive
7. Slide the tray assembly into the chassis and align the mounting holes.
8. Install the screws that secure the tray to the chassis.
9. Connect the SCSI cable and the power cable to the disk drive.
Internal Bay Disk Drives
To replace an internal bay disk drive:
1. Remove the right and left covers. See Chapter 1, “Accessing the System,” for details.
2. Disconnect the SCSI cable and power cable from the disk drive.
3. Remove the two screws that secure the drive bracket assembly to the left side of the
chassis.
Access hole (2)
4. Grasp the drive bracket assembly and remove the screw that secures the bracket to the
right side of the chassis.
5. Pull the drive bracket assembly out of the chassis.
6. Remove the four screws that secure the old drive to the bracket.
7. Do all of the following:
−
Note the SCSI ID jumper settings on the old drive
−
Set the SCSI ID on the new drive to the same ID as the old drive
−
Disable termination on the new drive
See Chapter 6, “Peripherals,” for details on these tasks.
8. Install the new drive on the bracket.
19
Alignment tabs
Rear mounting tab
Front mounting tabs
20
9. Insert the alignment tabs into the appropriate slots in the chassis.
Screw holes for front moun ting tabs
10. Install the two screws that secure the drive bracket assembly front mounting tabs to the
chassis.
11. Install the screw that secures the drive bracket assembly to the right side of the chassis.
12. Install the right side panel.
13. Connect the SCSI cable and the power cable to the new drive.
External SCSI Terminator
The connector for the external SCSI terminator board, MSMT283, is mounted on the rear of
the chassis just below the power supply. MSMT283 provides active termination for the
system end of the external Ultra SCSI bus. Cable MCBL253A connects the terminator to
J44 on the system board. See the system board diagram in Chapter 5, “System Board,” for
connector and socket locations.
To replace the external Ultra SCSI terminator board:
1. Swing the power supply out of the chassis. See Chapter 1, “Accessing the System,” for
details.
2. Unfasten the reusable wire tie that secures the power supply cable bundle.
3. Lift the power supply off its hinge pins and place it aside carefully.
4. Disconnect the SCSI cable (MCBL253A) from the terminator board. See the following
figure.
SCSI cable (to J44)
Term in ator board
Screws (2)
21
5. Remove the two small screws that secure the connector to the rear of the chassis.
6. Note the orientation of the terminator board and remove it from inside the chassis.
7. Orient the new terminator board component side down, align the mounting holes of the
new terminator with the chassis mounting holes, and install the two screws.
8. Connect the SCSI cable to the terminator.
9. Place the power supply on its hinge pins and fasten the wire tie on the cable bundle.
10. Swing the power supply back into the chassis and secure it with the plungers.
Power Supply
See Chapter 7, “Power Supply, Fans, and Hardware Monitoring Devices,” for details on the
power supply.
To replace the power supply:
1. Unplug the AC power cord from the rear of the unit.
2. Note the location of all power cable connectors on the system board and peripheral
devices.
22
3. Disconnect all power cables from all internal devices and the system board.
4. Place the power supply cable bundle outside the chassis.
5. Remove the knurled retaining/grounding screw on the back of the system. This fastener
is located between the top fan and the power supply fan.
6. Grasp and pull the power supply plungers toward each other, and then swing the power
supply out from the chassis.
Top plunger
Bottom plunger
7. Swing the power supply out sufficiently to avoid interference from the chassis or the top
system fan.
8. Lift the power supply off its hinges and set it aside.
9. If the new power supply does not have hinges and plungers, remove them from the old
supply and install them on the new power supply.
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