Dell PowerEdge 4200 Series User manual

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Information in this document is subject to change without notice.
1997 Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and PowerEdge are registered trademarks of Dell Computer Corporation; Intel, Pentium, and LANDesk are
registered trademarks and MMX is a trademark of Intel Corporation; IBM is a registered trademark of International Business Machines Corporation; Microsoft,
Windows NT, and MS-DOS are registered trademarks of Microsoft Corporation; Novell and NetWare are registered trademarks of Novell, Inc.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer
Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
July 1997 P/N 55472

v
Contents
Chapter 1
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Advanced Expansion Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Integrated Server Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Video Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Integrated SCSI Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
SCSI Hard-Disk Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
SCSI Configuration Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
SCSI ID Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Device Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
System Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
System Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Redundant Power Supply Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Pin Assignments for the DC Power Connectors
(Nonredundant Systems). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
DC Power Distribution (Nonredundant Systems) . . . . . . . . . . . . . . 1-14
Pin Assignments for the DC Power Connectors
(Redundant Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Power-Supply Paralleling Board . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
DC Power Distribution (Redundant Systems) . . . . . . . . . . . . . . . . . 1-19
System Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Cooling Fan Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
System Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Main Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
System Board Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Interrupt Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
DMA Channel Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

vi
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Chapter 2
Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Initial User Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
External Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Observing the Boot Routine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Internal Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Eliminating Resource Conflicts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Running the System Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Getting Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Chapter 3
Beep Codes and Error Messages. . . . . . . . . . . . . . . . . . 3-1
POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Chapter 4
Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Computer Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Front Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Front-Panel Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Externally Accessible Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Hard-Disk Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
SCSI Backplane Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Cooling Fan in Upper Power Supply Bay . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Power-Supply Paralleling Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Power Connector Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Cooling Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
System Board Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Expansion Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
DIMMs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

vii
Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Microprocessor SEC Cartridge/Heat Sink Assembly. . . . . . . . . . . . . . . 4-23
Guide Bracket Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
System Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Appendix A
System Setup Program. . . . . . . . . . . . . . . . . . . . . . . . . . A-1
System Setup Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Screen Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Key Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Screen Color Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3
Boot Options Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-5
Advanced Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-6
Security Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-8
Exit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10
Index
Figures
Figure 1-1. Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 1-2. Front-Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 1-3. Front/Left Internal View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure 1-4. Back/Right Internal View . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Figure 1-5. I/O Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Figure 1-6. Power Supply Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Figure 1-7. Power Connector Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Figure 1-8. DC Power Connector J11 (P1). . . . . . . . . . . . . . . . . . . . . . . . 1-12
Figure 1-9. DC Power Connectors J12 (P2), J13 (P3), and
J14 (P4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Figure 1-10. DC Power Connector J15 (P5). . . . . . . . . . . . . . . . . . . . . . . . 1-13
Figure 1-11. Power Distribution (Nonredundant System) . . . . . . . . . . . . . 1-14
Figure 1-12. DC Power Connector PWR1 . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Figure 1-13. DC Power Connector PWR2 and PWR3. . . . . . . . . . . . . . . . 1-16
Figure 1-14. DC Power Connector PWRSCSI (DDBP). . . . . . . . . . . . . . . 1-16
Figure 1-15. DC Power Connector PWRFD (FD1–FD4). . . . . . . . . . . . . . 1-17
Figure 1-16. Power-Supply Paralleling Board Connectors . . . . . . . . . . . . 1-18
Figure 1-17. Power Distribution (Redundant System) . . . . . . . . . . . . . . . . 1-19
Figure 1-18. System Board Components . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

viii
Figure 1-19. System Board Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Figure 4-1. Computer Covers Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Figure 4-2. Keylocks on Computer’s Back Panel . . . . . . . . . . . . . . . . . . . 4-3
Figure 4-3. Front Bezel Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Figure 4-4. Front-Panel Insert Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Figure 4-5. Drive Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Figure 4-6. Externally Accessible Drive Removal. . . . . . . . . . . . . . . . . . . 4-6
Figure 4-7. Drive-Mounting Rails Removal . . . . . . . . . . . . . . . . . . . . . . . 4-7
Figure 4-8. Hard-Disk Drive Carrier Removal . . . . . . . . . . . . . . . . . . . . . 4-8
Figure 4-9. Hard-Disk Drive Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Figure 4-10. SCSI Backplane Board Removal. . . . . . . . . . . . . . . . . . . . . . 4-10
Figure 4-11. Power Supply Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Figure 4-12. Removing Fan in the Upper Power Supply Bay . . . . . . . . . . 4-12
Figure 4-13. Power-Supply Paralleling Board Removal
(Redundant Systems). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Figure 4-14. Power Connector Panel Removal (Nonredundant Systems). 4-15
Figure 4-15. Control Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Figure 4-16. Cooling Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Figure 4-17. System Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Figure 4-18. System Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Figure 4-19. Expansion Card Connector Locations. . . . . . . . . . . . . . . . . . 4-20
Figure 4-20. Location of DIMM Sockets. . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Figure 4-21. DIMM Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Figure 4-22. DIMM Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Figure 4-23. Removing a Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Figure 4-24. Microprocessor SEC Cartridge Release Latches. . . . . . . . . . 4-24
Figure 4-25. Microprocessor SEC Cartridge/Heat Sink Removal. . . . . . . 4-24
Figure 4-26. Inserting Microprocessor SEC Cartridge/Heat Sink
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Figure 4-27. System Battery Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Figure A-1. Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3
Figure A-2. Boot Options Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Figure A-3. Advanced Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-6
Figure A-4. Security Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Figure A-5. Exit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Tables
Table 1-1. DC Voltage Ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Table 1-2. Jumper Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

ix
Table 1-3. Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
Table 1-4. DREQ Line Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Table 1-5. Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Table 3-1. Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-2. System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Table A-1. System Setup Key Functions . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Table A-2. Main Menu Categories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4
Table A-3. Boot Options Submenu Categories . . . . . . . . . . . . . . . . . . . . .A-5
Table A-4. Advanced Menu Categories. . . . . . . . . . . . . . . . . . . . . . . . . . .A-7
Table A-5. Security Menu Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9
Table A-6. Exit Menu Categories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-11

R
ead This First
W
arnings, Cautions, and Notes
Throughout this manual, there may be blocks of text printed in bold type or in
italic type. These blocks are warnings, cautions, and notes, and they are used as
follows:
NOTE: A NOTE provides helpful information about using the computer system.
A prerequisite for using this manual to service Dell computer systems is a
basic knowledge of IBM®-compatible PCs and prior training in IBM-
compatible PC troubleshooting techniques. Moreover, only service techni-
cians trained in Dell removal and replacement methods should perform the
procedures explained in this manual.
In addition to information provided in this manual and the User’s Guide that
came with the system, Dell provides the Installation and Troubleshooting
Guide for troubleshooting procedures and instructions on using the Dell di-
agnostics to test the computer system.
WARNING: A WARNING indicates the potential for bodily harm and
provides instructions for how to avoid the problem.
CAUTION: A CAUTION indicates either potential damage to hardware
or loss of data and provides instructions for how to avoid the problem.
x

System Overview 1-1
Chapter 1
System Overview
T
he Dell®PowerEdge®4200 system is a high-speed, high-availability,
upgradable server system built around the Intel®Pentium®II family of
microprocessors. For ease of expansion, the PowerEdge 4200 system provides
both PCI expansion slots as well as industry-standard EISA expansion slots.
The PowerEdge 4200’s system board supports a variety of expansion features
including a second microprocessor upgrade and eight DIMM connectors that
permit expanding main memory from a standard 64 MB to 512 MB. A jumper
block on the system board permits easy selection/deselection of system features
such as password protection, onboard video controller, and internal processor
clock speed.
Up to six internal hard-disk drive bays and four external hard-disk drive bays
provide for a variety of CD-ROM, tape backup, diskette drive, and hard-disk
drive installation options.
For increased system availability and ease of servicing, the PowerEdge 4200
system is equipped with a hot-pluggable SCSI hard-disk drive backplane, ther-
mal and power-supply monitoring features, redundant fans, ECC memory,
optional redundant power supplies, and RAID capability.
The PowerEdge 4200 system is designed for freestanding operation but can also
be rackmounted.
S
ystem Features
The Dell PowerEdge 4200 system includes the following standard features:
•Pentium II microprocessor with math coprocessor, MMXTM technology, and
Single Instruction, Multiple Data (SIMD), a technique that allows the
microprocessor to process multiple data elements in parallel
•Support for symmetric multiprocessing when a second microprocessor is
installed (requires multiprocessing operating system such as Microsoft®
Windows NT®3.51 or higher or Novell®NetWare®4.11 SMP or higher)
•512 KB of cache memory located in the microprocessor/single-edge contact
(SEC) cartridge/heat sink assembly that also houses the Pentium II
microprocessor
•64 MB of 72-bit-wide, buffered, EDO system memory, upgradable to a
maximum of 512 MB by installing combinations of 32- to 128-MB DIMMs
in eight DIMM sockets on the system board; fast-page mode and EDO
DIMMs are supported

1-2 Dell PowerEdge 4200 Systems Service Manual
•Hot-pluggable SCSI backplane that supports up to six hard-disk drives
•Optional, redundant hot-pluggable power supply and power-supply parallel-
ing board
•Redundant cooling fans
•Error correction feature built into the memory controller on the system
board
•Advanced combination EISA and PCI expansion subsystem
•Five PCI and three EISA expansion-card slots (none shared)
•Integrated VGA-compatible video subsystem attached to the PCI local bus,
with 1 MB video memory
•Integrated super I/O controller attached to the EISA bus that controls
the bidirectional parallel port, two serial ports, and the diskette drive
interface
•Integrated Ultra/Wide and Ultra/Narrow SCSI controllers
•Integrated server management circuitry that monitors critical system volt-
ages and temperatures as well as the operation of the system cooling fans
•SCSI CD-ROM drive in an externally accessible drive bay
•Recessed power and reset buttons to prevent accidental system interruptions
NOTES:For a complete list of system features, see “Technical Specifications” found
later in this chapter.
For information about installing the PowerEdge 4200 system in a rack, see the
Dell PowerEdge 4200 rack installation documentation.

System Overview 1-3
Figure 1-1. Computer Orientation
NOTE: When following the text in this manual, assume that the location or
direction relative to the system is as shown in Figure 1-1.
Figure 1-2. Front-Panel Features
back of computer
right side
left side
front of computer
powerswitch
resetbutton
hard-disk drive
online indicators (6)
power indicator
diskette-drive
access indicator
hard-disk drive
activity indicators (6)
hard-disk drive
failure indicators (6)

1-4 Dell PowerEdge 4200 Systems Service Manual
Figure 1-3. Front/Left Internal View
CAUTION: To avoid possible data or file structure corruptions, the
front-panel reset button should be used only to restart your system when
the normal shutdown and restarting procedure fails. Before using the
reset button to initiate a hardware reset, close any open application pro-
grams and files if possible. If you are using MS-DOS®, the system can be
rebooted by pressing <Ctrl><Alt><Del>.
external
drive
bays (4)
internal
drive
bays (6)
system board
microprocessor SEC
cartridge/heat sink
assemblies (2)
expansion
slots
intrusion
detection
switch

System Overview 1-5
Figure 1-4. Back/Right Internal View
SCSI backplane
board
external drive
bays (4)
internal drive
bays (6)
SCSI interface
cable
(Ultra/Wide)
SCSI power
connector
server
management
connector
control panel connector
diskette interface
cable
(Ultra/Narrow)
power supply (optional) or cooling fan power supply SMB connector

1-6 Dell PowerEdge 4200 Systems Service Manual
Figure 1-5. I/O Panel
System Memory
The PowerEdge 4200 systems have a minimum of 64 MB of 72-bit-wide, buff-
ered EDO memory. The system memory capacity can be expanded to 512 MB
by using combinations of 32- and 128-MB buffered, EDO DIMMs.
The system board has eight 168-pin DIMM sockets. The socket population rules
for the DIMMs are as follows:
•Populate the DIMM sockets in order from DIMM_A (upper) to DIMM_H
(lower).
•The DIMMs should be obtained from Dell to guarantee compatibility. All
system memory operates at the speed of the slowest DIMM installed.
•DIMMs of both capacities can be installed in the system. However, the
larger-capacity DIMMs should be installed in the top sockets, beginning
with socket DIMM_A, with the smaller-capacity DIMMs installed after-
wards in order toward socket DIMM_H.
keylocks (2)
parallel port
connector
AC power receptacle
serial port 1
connector
mouse
connector
keyboard
connector
serial port 2
connector
video
connector
server-
management
serial port
connector
security
cable slot
power supply
(optional) or
cooling fan
SMB connector
power-supply
fault LED (red)
power-supply
online LED
(green)
SCSI
connector
power supply

System Overview 1-7
The 72-bit-wide, buffered EDO DIMMs support the ECC feature, which detects
memory errors and corrects single-bit memory errors. The ECC feature pro-
vides more reliable memory and less downtime, and is built into the memory
controller on the system board.
See “DIMMs” in Chapter 4 for information on removing and replacing DIMMs.
Advanced Expansion Subsystem
The computer system offers an advanced expansion subsystem that can support
a mixture of traditional EISA expansion cards, Plug and PlayISA expansion
cards, and PCI expansion cards. The EISA Configuration Utility, included with the
system, provides a means of avoiding resource conflicts that might arise from such
an arrangement.
After all legacy cards have been configured with the EISA Configuration Utility,
the system automatically assigns required memory space, IRQ lines, and DMA
channels to any installed Plug and Play ISA expansion cards and PCI expansion
cards the next time the system is rebooted. Chapter 5, “Using the EISA Config-
uration Utility,” in the Dell PowerEdge 4200 Systems User’sGuide describes the
EISA Configuration Utility and provides instructions for using it to configure the
system.
The eight expansion-card slots include three EISA expansion-card connectors
and five PCI expansion-card connectors. The expansion-card connectors are
located on the system board (see Figure 1-18).
Integrated Server Management
The system board contains integrated server management circuitry that moni-
tors critical system voltages and temperatures, as well as the operation and
speed of the system cooling fans. The integrated server management circuitry
works in conjunction with the Intel LANDesk®Server Management suite.
Video Controller
The video subsystem, built into the system board, is a high-speed, high-
resolution, VGA-compatible video subsystem connected to the PCI local bus.
The standard video subsystem contains 1 MB of DRAM memory (the video
memory size is not upgradable).
Maximum noninterlaced resolutions are 640 x 480 pixels with 16.7 million col-
ors, 800 x 600 pixels with 65,536 colors, and 1024 x 768 pixels with 256 colors.
Integrated SCSI Controllers
A built-in Adaptec 7880 Ultra/Wide SCSI controller provides an Ultra/Wide
Fast SCSI interface via a 68-pin connector on the system board. This SCSI con-
troller attaches to the PCI bus to provide a high-performance SCSI bus that
controls up to six SCSI hard-disk drives in the SCSI hard-disk drive bays.
In the standard Dell PowerEdge 4200 system configuration, the Ultra/Wide
SCSI host adapter on the system board controls the SCSI backplane board.
When used in combination with an optional PowerEdge Expandable RAID

1-8 Dell PowerEdge 4200 Systems Service Manual
Controller host adapter card, the SCSI backplane board allows you to remove
and insert hard-disk drives without shutting down the system. External hard-
disk drives are not supported by the built-in SCSI controller.
A built-in Adaptec 7860 Ultra/Narrow SCSI controller provides a SCSI inter-
face via a 50-pin connector to the CD-ROM drive in the externally accessible
drive bay and to any other SCSI drives installed in the other two bays.
SCSI Hard-Disk Drives
Six internally accessible hot-pluggable hard-disk drive bays are located under
the externally accessible drive bays at the front of the computer (see Figure 1-
4). These bays can contain up to six 1- to 1.6-inch-high SCSI hard-disk drives
(either Ultra/Wide or Ultra/Narrow).
NOTE: The externally accessible drive bays at the front of the computer are
normally used for diskette drives, CD-ROM drives, and/or tape drives. Hard-
disk drives should be installed in the SCSI hard-disk drive bays. For detailed
information about installing externally accessible drives, see Chapter 4 of this
manual.
SCSI Configuration Guidelines
Although SCSI devices are installed essentially the same way as other devices,
their configuration requirements are different. To configure your SCSI sub-
system, follow the general guidelines offered in the following subsections.
SCSI ID Numbers
Each device attached to the 7860 Ultra/Narrow SCSI host adapter must have a
unique SCSI ID number from 0 to 7.
When Narrow SCSI devices are shipped from Dell, the default SCSI ID num-
bers are assigned as follows:
•The computer’s built-in Ultra/Narrow SCSI host adapter is configured
through the BIOS as SCSI ID 7.
•A SCSI CD-ROM drive (installed in an externally accessible drive bay) is
configured as SCSI ID 5.
•A SCSI tape drive (if installed) is configured as SCSI ID 6.
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or
that devices be attached to the cable in order by ID number.
Devicesattached to the Ultra/Wide SCSI host adapter need no IDsettings or ter-
mination; ID settings and termination are handled automatically by the SCSI
backplane.
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. Therefore,

System Overview 1-9
regardless of whether you are installing internal or external devices, use the fol-
lowing guidelines:
•A single SCSI device (such as the standard CD-ROM drive) is terminated.
•If two or more SCSI devices are installed, connect the devices as follows:
—Attach oneof the devices to the end connector on theSCSI cable, and leave the
terminator enabled on that device.
—The other endof the SCSIcable connectstothecomputer’s built-in Ultra/Narrow
SCSI host adapter or to an optional SCSI host adapter card, which needs no
termination.
—Disabletheterminators onallother devices you attach to the cable.
The standard SCSI CD-ROM drive is configured as the last device on the SCSI
cable. Therefore, any additional devices attached to the cable should have their
terminators disabled.
See the documentation provided with the SCSI device for information on dis-
abling the device’s terminator.
S
ystem Unit
The following subsections provide service-related information about the system
unit.
System Power Supply
The PowerEdge 4200 system contains either one 700-watt power supply (non-
redundant configuration) or two 700-watt power supplies (redundant
configuration).
Each installed power supply can operate from an AC power source of 90 to 265
VAC at 50 or 60 Hz. When the red LED on a power supply is lit (except during
start-up), it indicates that the power supply has failed (see Figure 1-5). When
the green LED is lit, it indicates that +5 VDC is on. The system power supply
provides the DC operating voltages and currents listed in Table 1-1.
NOTE: The power supply produces DC voltages only under its loaded condi-
tion. Therefore, when you measure these voltages, the DC power connectors
must be connected to their corresponding power input connectors on the system
board or drives.
.

1-10 Dell PowerEdge 4200 Systems Service Manual
Redundant Power Supply Option
Systems with the optional redundant power supply feature contain a power-
supply paralleling board and a second 700-watt power supply module. In this
case, the two power supply modules each provide part of the power for the sys-
tem and are hot-pluggable (either power supply module can be removed and
replaced while the system is online and operational). Power distribution dia-
grams for both the redundant and nonredundant power configurations are
provided later in this chapter.
Pin Assignments for the DC Power Connectors
(Nonredundant Systems)
The power-supply output voltages for nonredundant systems can be measured
at the connectors on the back of the power supply (P1, P2, P3, P4, and P5) or at
Table 1-1. DC Voltage Ranges
Voltage Range Maximum Output
Current 1
+3.3 VDC +3.135 to +3.465 VDC 15.0 A
+5 VDC +4.90 to +5.25 VDC 50.0 A
+12 VDC +11.40 to +12.60 VDC 25.0 A
–12 VDC –10.80 to –13.20 VDC 0.3 A
–5 VDC –4.50 to –5.50 VDC 0.3 A
+5 VFP 2+4.85 to +5.36 VDC 0.25 A
1Maximum continuous DC output power shall not exceed 700 W.
2VFP (volts flea power) — sometimes called “standby power.”