InterServe 800
System Reference
April 1998
DHA027000
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 Unpublished rights are reserved under the copyright laws of the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.
InterServe is a trademark of Intergraph Computer Systems.
Microsoft, Windows, and MS-DOS are registered trademarks of Microsoft Corporation. Windows NT is a trademark of Microsoft
Corporation.
Other brands and product names are trademarks of their respective owners.
FCC/DOC Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy. If the equipment is not installed and used in
accordance with the instruction manual, it may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil
numérique de la classe A respecte toutes les exigencies du Règlement sur le materiél brouilleur du Canada.
Warnings
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.
The service and upgrade instructions should be performed by qualified personnel only. Qualified personnel 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.
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
Preface.........................................................................................................................ix
About This Document.................................................................................................. ix
Document Conventions................................................................................................ ix
Customer Support..........................................................................................................x
1 Accessing the Components.......................................................................................1
Avoiding Electrostatic Discharge...................................................................................2
Opening the Base Unit...................................................................................................2
Closing the Base Unit ....................................................................................................5
2 Replacing System Components................................................................................7
Preparing to Replace Components..................................................................................8
Floppy Disk Drive or Combo Drive................................................................................8
RAID Disk Drives........................................................................................................10
RAID Disk Drive Section (MESAN52)........................................................................12
AC Section (MESAN590)............................................................................................14
DIMMs........................................................................................................................15
System Board (MSMT497A)........................................................................................16
Power Distribution Board (MSMT498 or MSMT499).................................................. 18
LCD Board (MSMT344)..............................................................................................20
Power Supplies............................................................................................................22
Cooling Fans(CFAN123).............................................................................................25
Lithium (CMOS/Clock) Battery...................................................................................26
v
Hardware and Software Support Services.........................................................x
World Wide Web.............................................................................................x
Intergraph Bulletin Board Service ....................................................................x
FAXLink........................................................................................................ xi
Telephone ...................................................................................................... xi
More Support Options................................................................................... xii
300 Watt Power Supply (MPWS175)..............................................................22
550 Watt Power Supplies (MPWS139)...........................................................24
3 Upgrading the System............................................................................................27
Preparing to Upgrade the System ................................................................................. 28
Adding Memory...........................................................................................................28
Adding a Processor......................................................................................................30
Adding Expansion Cards .............................................................................................31
Slot Locations................................................................................................32
Upgrading Graphics Cards .............................................................................32
Installing Expansion Cards ............................................................................33
Assigning System Resources.......................................................................... 33
vi
Adding Peripherals ......................................................................................................34
Peripheral Device Locations...........................................................................35
Installing Devices in the Drive Bays...............................................................36
Adding External SCSI Drives ......................................................................................38
SCSI Cable Length Guidelines.......................................................................39
SCSI Cable Quality Guidelines.......................................................................39
SCSI ID Guidelines........................................................................................40
SCSI Termination Guidelines for External Devices ........................................40
Connecting the External SCSI Drive ..............................................................40
Changing SCSI Host Adapter or Device Settings............................................41
Disabling SCSI Sync Negotiation...................................................................41
4 System Hardware...................................................................................................43
Hardware Overview.....................................................................................................45
Functional Diagram .....................................................................................................46
Systems with a 300 Watt Power Supply (MPWS175)......................................46
Systems with 550 Watt Power Supplies (MPWS139)......................................47
LCD Board (MSMT344)..............................................................................................48
Board Layout..................................................................................................49
Cable Connectors...........................................................................................50
Cable Routing and Pinouts .............................................................................50
Power Distribution Board (MSMT498 or MSMT499).................................................. 51
Board Layout..................................................................................................51
Cable Routing and Pinouts .............................................................................52
AC Section (MESAN590)............................................................................................55
RAID Disk Drive Section (MESAN52)........................................................................56
Assembly Layout............................................................................................56
Cable Routing and Pinouts .............................................................................57
Channel Module.............................................................................................58
SAF-TE Card................................................................................................. 58
Jumper Settings..............................................................................................58
Power Supplies............................................................................................................59
300 Watt Power Supply (MPWS175)..............................................................59
550 Watt Power Supplies (MPWS139)...........................................................60
Operating Characteristics ...............................................................................61
Connector Pinout ...........................................................................................62
Cooling Fans and Temperature Sensors .......................................................................63
5 System Board ..........................................................................................................65
Slots and Sockets.........................................................................................................66
Cable Routing and Pinouts...........................................................................................67
Jumper Connectors ......................................................................................................71
External Ports ..............................................................................................................73
Configuration Data ......................................................................................................77
DMA Channels .............................................................................................. 77
Input/Output Addresses..................................................................................77
Memory Address Map....................................................................................78
PCI to ISA Bus Interrupt Mapping .................................................................78
Interrupt Requests (IRQs)...............................................................................79
6 Peripherals..............................................................................................................81
Peripheral Cables.........................................................................................................82
Internal Wide Ultra SCSI Cable (MCBL348A)...............................................82
Internal Narrow Ultra SCSI Cable (MCBL338A) ...........................................83
EIDE Cable (MCBL121A).............................................................................83
Floppy Cable (MCBL106A)...........................................................................84
Peripheral Drives.........................................................................................................84
EIDE CD-ROM Drive (CDSK177).................................................................84
SCSI CD Recorder (CDSK133)......................................................................85
Iomega Jaz 1 GB SCSI Internal Drive (CDSK168).........................................86
40 GB 8 MM Tape Drive (CMTP169)............................................................87
Floppy Disk Drive (CDSK146).......................................................................88
Disk Drives.................................................................................................... 88
7 System Specifications.............................................................................................91
System Model Number.................................................................................................92
Specifications...............................................................................................................93
System Configuration Summary...................................................................................94
System Board...............................................................................................................95
Sound Controller .........................................................................................................95
Hardware Monitoring and Power Management ............................................................96
Intrusion Alert Switch....................................................................................97
Temperature Sensors...................................................................................... 97
Fan Speed Monitoring....................................................................................97
Optional Hardware.......................................................................................................97
vii
A Firmware and BIOS Procedures ..........................................................................99
Installing RAID Disk Drive Section (MESAN52) Firmware ........................................99
Installing RAID Controller BIOS...............................................................................100
Index.........................................................................................................................101
viii
Preface
InterServe 800 System Reference describes how to service and upgrade an InterServe 800
system.
About This Document
InterServe 800 System Reference is organized as follows:
u
Chapter 1, “Accessing the Components,” describes how to open and close the case and
how to access internal components.
u
Chapter 2, “Servicing the System,” describes how to maintain the components of the
system.
u
Chapter 3, “Upgrading the System,” describes how to add components to expand the
system.
u
Chapter 4, “System Hardware,” provides a system hardware overview and technical
information on the components of the system.
ix
u
Chapter 5, “System Board,” provides technical information specific to the system board.
u
Chapter 6, “Peripherals,” provides connector locations for peripheral cables and drives.
u
Chapter 7, “System Specification,” provides system configuration summary and
specifications.
u
Appendix A, “Firmware and BIOS Procedures,” describes how to install the disk section
firmware and RAID Controller BIOS.
Document Conventions
Bold
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
CTRL+D Press a key while simultaneously pressing another key; for example, press
Commands, words, or characters that you key in literally.
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 and D simultaneously.
x
Customer Support
Intergraph Computer Systems offers an assortment of customer support options.
Hardware and Software Support Services
Intergraph Computer Systems provides a variety of hardware services for Intergraph and
third-party equipment. Services include warranty upgrades, repair depot service, on-site
hardware maintenance, system administration, and network consulting. Hardware
purchased from Intergraph Computer Systems includes a factory warranty ranging from 30
days to three years. A detailed warranty description is available on the World Wide Web;
see the Support pages at http://www.intergraph.com/ics.
Intergraph Computer Systems provides complimentary software support for 30 or 90 days
following shipment of a hardware or software product. This includes World Wide Web
access, Intergraph Bulletin Board Service access, FAXLink service, and telephone (Help
Desk) support. At the end of the complimentary support period, you can purchase other
levels of software support.
World Wide Web
You can visit Intergraph Computer Systems on the World Wide Web at
http://www.intergraph.com/ics. On these pages, you can get news and product
information, technical support information, software updates and fixes, and more.
Intergraph Bulletin Board Service
On the Intergraph Bulletin Board Service (IBBS), you can get technical support information,
software updates and fixes, and more.
To connect to the IBBS:
1. Set your system’s communications protocol for eight (8) data bits, no parity, one (1) stop
bit, and any baud rate up to 14,400.
2. Using a modem, call 1-256-730-8786. Outside the United States, call one of the mirror
sites listed on World Wide Web; see the Software Support pages at
http://www.intergraph.com.
3. At the login prompt, key in your user ID. If you have not connected before, key in new
to create a user ID.
4. Follow the menus to find what you need. The IBBS provides clear choices and online
help.
If you have trouble connecting to or using the IBBS, call the Customer Response Center at
1-800-633-7248 (product entry IBBS) or leave a message for the IBBS System Operator at
1-256-730-1413.
FAXLink
To use the FAXLink:
u
u
Telephone
To get customer support by telephone:
u
u
xi
Call 1-800-240-4300 for information on how to get technical support information using
the FAXLink.
Call 1-256-730-9000 to get documents (up to five per call).
In the United States, call 1-800-633-7248 between the hours of 7:00 a.m. and 7:00
p.m. Central Time, Monday through Friday (except holidays).
Outside the United States, contact your local Intergraph Computer Systems subsidiary or
distributor.
Have the following information available when you call:
u
Your service number, which identifies your site to Intergraph Computer Systems. You
use your service number for warranty or maintenance calls.
u
Your Customer Personal Identification Number (CPIN). You get a CPIN the first time
you call the Customer Response Center; it is associated with your service number for
future call logging.
u
The product’s name or model number.
u
The product’s serial number. Software product serial numbers are included in the
product packaging. Hardware product serial numbers are on a sticker affixed to the
hardware product.
u
Your name and telephone number.
u
A brief description of the question or problem.
xii
More Support Options
To get information on more customer support options:
u
Visit the Support pages on the World Wide Web at http://www.intergraph.com/ics.
u
For hardware support questions in the United States, call 1-800-763-0242.
u
For software support questions in the United States, call 1-800-345-4856.
Outside the United States, contact your local Intergraph Computer Systems subsidiary or
distributor.
1 Accessing the Components
This chapter describes how to access the internal components of the system so you can
service and upgrade an InterServe 800 system. It also describes methods for avoiding
electrostatic discharge and closing the base unit.
WARNING 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.
NOTE “Right side” and “left side” are as seen from the front of the unit.
Avoiding Electrostatic Discharge......................................................................................... 2
Opening the Base Unit......................................................................................................... 2
Closing the Base Unit .......................................................................................................... 5
1
2
Avoiding Electrostatic Discharge
Sensitive components inside the base unit can be damaged by static electricity. To protect
against this possibility, take the following precautions when working with the system’s
internal components.
u
Touch the bare metal of the base unit to ensure the base unit and your body are at the
same electric potential.
u
Handle all printed circuit boards as little as possible and by the edges only. Leave new
parts in their protective packaging until you install them.
u
Use a disposable or reusable antistatic wrist strap when servicing or upgrading the
system. Once a disposable wrist strap is used, it cannot be used again.
u
A reusable antistatic wrist strap can be attached to any bare metal part of the base unit.
The metal conductor in the elastic sleeve of reusable antistatic straps must contact bare
skin.
Opening the Base Unit
CAUTION The system produces high-leakage current. Flip the circuit breaker (if included) to the OFF
position when servicing or upgrading the base unit.
Tools are not required to remove the side panels because twist locks secure the panels to the
unit. The following table shows which panel to remove to access the internal components.
Panel
Components
Right side System board, memory, processors, main cooling fans
Left side AC section for redundant power supply only
Both CD-ROM drive, floppy disk (or combo) drive, power distributions board
assembly; 5.25-inch option devices, LCD board, RAID section
NOTE The redundant power supplies can be removed without taking off either of the side panels.
Side panel removal is necessary for removal and replacement of the fixed mount power
supplies.
CAUTION Use caution to avoid injury when removing side panels and other hardware.
WARNING For units installed in a stand-alone rack, ensure the rack’s front and side stabilizers
are extended at all times. If the rack includes adjustable feet on the stabilizers, they
must be in full contact with the floor. If the rack includes locking casters, they should
be locked.
To open the base unit:
1. Defeat the system’s intruder alert. See System Setup for more information.
2. Log off and shut down the operating system.
3. If your system contains two 550 Watt power supplies, flip the circuit breaker switch to
the OFF position.
If your system contains a 300 Watt power supply, turn the keyswitch to OFF and remove
the AC power cord before performing any service operations. Systems configured with
the 300 Watt power supply do not have a circuit breaker.
4. If the base unit is in a rack and uses Intergraph sliding shelves, slide the unit out of the
rack.
−
Remove the screw (located under the sliding shelf handle) securing the sliding shelf
to the rack.
−
Disengage the sliding shelf by lifting the release lever.
3
−
Pull the shelf out until it locks in the extended position. The rback of the base unit
should clear the front of the rack by two inches. You may need to disconnect cables
to fully extend the unit.
−
The base unit can remain on the shelf during the servicing or upgrade procedures.
WARNING For units installed in a standalone rack, ensure the rack’s front and side stabilizers are
extended at all times. If the rack includes adjustable feet on the stabilizers, they must
be in full contact with the floor. If the rack includes locking casters, they should be
locked.
5. Locate the twist locks on the back of the base unit. Turn the locks counter-clockwise to
disengage the side panels.
6. Pull the side panels back an inch then lift them off the unit. Figures on the following
page show internal views of the system.
4
Right panel
removed
Left panel
removed
7. Before performing the service or upgrade procedure, review the section “Avoiding
Electrostatic Discharge.”
Closing the Base Unit
CAUTION After servicing or upgrading the system, always replace the panels that were removed. The
panels 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. The system will not start unless the panels are properly
replaced.
To close the base unit:
1. Disconnect the antistatic wrist strap from the base unit.
2. Replace the side panels and turn the twist locks clockwise to lock the panels into place.
3. If the unit is rack-mounted:
−
Unlock the sliding shelf by pressing the release tab.
−
Push the base unit into the rack until it fully retracts and locks into place.
−
Secure the sliding shelf by installing the screw under the sliding shelf handle.
5
6
2 Replacing System Components
This chapter describes how to replace components in an InterServe 800 system.
Preparing to Replace Components........................................................................................ 8
Floppy Disk Drive or Combo Drive......................................................................................8
RAID Disk Drives.............................................................................................................. 10
RAID Disk Drive Section (MESAN52).............................................................................. 12
AC Section (MESAN590).................................................................................................. 14
DIMMs.............................................................................................................................. 15
System Board (MSMT497A).............................................................................................. 16
Power Distribution Board (MSMT498 or MSMT499)........................................................ 18
LCD Board (MSMT344).................................................................................................... 20
Power Supplies.................................................................................................................. 22
300 Watt Power Supply (MPWS175)....................................................................22
550 Watt Power Supplies (MPWS139)................................................................. 24
Cooling Fans(CFAN123)................................................................................................... 25
Lithium (CMOS/Clock) Battery......................................................................................... 26
7
8
Preparing to Replace Components
Obey all warning and caution labels while replacing parts. The procedures in this chapter
assume you have opened the unit to access the internal components. After you have finished
servicing the system, close the unit as described in Chapter 1, “Accessing the Components.”
Before replacing parts, ensure the problem has been correctly identified so that you do not
inadvertently replace a properly working part. The troubleshooting chapter in System Setup
has a list of potential problems and errors your system may exhibit.
WARNING Disconnect the system from AC power before servicing internal components! Failure
to remove AC power may result in equipment damage or personal injury.
WARNING 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.
CAUTION The system produces high-leakage current. Flip the circuit breaker (if included) to the OFF
position when servicing or upgrading the base unit.
Floppy Disk Drive or Combo Drive
Standard hardware for the server includes a floppy disk drive in the 3.5-inch slot. If your
system contains the combo drive (containing a floppy disk drive and a PC Card adapter), it is
replaced in the same way as the floppy disk drive. However, note the difference in cables as
stated in the following instructions.
To replace the floppy disk drive or combo drive:
1. Remove both side panels. The following figure shows the floppy disk drive from the
back.
9
Screws
Bracket
Floppy Disk
Drive
Floppy Cable
Power Cable
EIDE Cable
Peripheral
Cage
2. Disconnect the floppy cable and power cable from the drive. If the combo drive is
installed (not shown), also disconnect the two ISA bus cables (not shown). Note the
position of the red stripe on the floppy cable and ISA bus cables. The cables must be
installed on the new drive in the same orientation.
3. The drive is secured to the system using a bracket that extends to the sides of the
peripheral cage. Using a quarter-inch nutdriver, remove and retain the screws (two each
side) from the peripheral cage as shown above.
4. Disconnect the EIDE cable attached to the CD-ROM drive.
5. Lift up the floppy disk drive and slide it back, then out the side of the system.
6. Remove and retain the four screws (two each side) from the bracket.
10
Screws
Bracket
7. Secure the new drive to the bracket using the screws removed in the previous step.
8. Install the drive into the base unit, and secure it using the screws removed in step 3.
9. Connect the previously removed cables to the new drive.
10. Reconnect the EIDE cable to the CD-ROM drive.
RAID Disk Drives
The disk drives in the RAID disk section can be easily replaced as follows.
To replace disk drives:
1. Open the drive access door on the front of the system.
2. Flip the drive latches outward to disengage the disk drive. The LED adjacent to the
drive turns off.
3. Slowly pull the drive out of the system. Do not let the drive fall when it clears the rails
inside the internal disk section. Refer to the following figure.
Slot
Guides
11
Latches
NOTE The drive may continue to spin for a short duration after you remove it from the system. It is
best to let the drive stop spinning before removal to avoid damaging the drive. Wait at least
30 seconds from the time the LED goes out until you move the drive any more.
4. To insert the new drive, extend the latching clips on the disk drive and align the rails on
the sides of the drive with the slot guides. The metal casing of the drive faces up.
5. Push the drive between the latching clips until it slides all the way into the slot and
firmly engages the connector.
6. Close the latching clips to lock the drive in the slot.
7. Restart the system and ensure the LED for the new disk drive lights and remains steady
green.
8. Label the new drive with the same ADP, CH, and ID numbers used on the replaced
drive.
12
RAID Disk Drive Section (MESAN52)
The RAID disk drive section includes the disk drive cage, backplane, sensor boards and LED
boards. This assembly is always replaced as one unit.
To replace the RAID disk drive section:
1. Remove both side panels.
2. Remove all the drives from the disk drive section. Note the original slot location for
each drive. The drives should be reinstalled in the same slot locations from which they
were removed.
3. Disconnect the two SCSI cables from the top of the disk drive section.
4. Disconnect the four power cables attached to the disk drive section.
5. Disconnect the LCD and LED cables from the disk drive section on the left side of the
unit.
LCD Cable
LED Cable
6. Remove and retain the screw from each corner of the RAID disk drive section.
13
Screw
Screw
Screw
Disk
Drive
Section
Screw
7. Slowly pull the RAID disk drive section out of the base unit.
8. Verify that the jumper settings on the back of the replacement RAID disk drive section
match the one being replaced.
NOTE If the system uses the AMI RAID controller, the jumper connectors JP2 and JP3 must not
have any jumpers installed.
9. Insert the new RAID disk drive section and secure it with the screws removed earlier.
10. Reattach the LED cable and the LCD cable to the RAID disk drive section.
11. Reattach the SCSI and power cables to the backplane.
−
CH 0 on the RAID controller or Ultra Wide SCSI controller must be attached to the
CH 0 connector on the disk section, and same for CH 1.
−
The order of the power cables is not critical.
14
12. Insert the disk drives into the system. The drives should be installed in the same slots
from which they were removed.
13. Replace the side panels.
14. Restart the system and ensure the LED for each drive lights and remains steady green.
If not, refer to the System Setup for status LED information.
AC Section (MESAN590)
The AC section is used only in systems with dual 550 Watt power supplies.
To replace the AC section:
1. Turn OFF the circuit breaker and disconnect the power cord.
2. If the system is in a rack, slide it out of the rack.
3. Remove the left side panel.
4. Disconnect the AC input wires.
5. Remove the screw securing the AC box (located adjacent to the AC input wire plug.
AC Section
6. Slide the AC section out toward the front of the system. After moving only an inch or so
the AC section will be released from the chassis.
AC Input
Wires
DIMMs
15
7. Install the new AC section by locating the cutouts in the bottom of the housing above
the tabs on the mounting plane. Slide the housing toward the back of the chassis until it
rests against the back of the chassis. Secure it with the screw removed in step 5.
8. Connect the AC input wires.
9. Replace the right side panel.
10. Connect the AC power cord to the system to the AC receptacle.
11. Turn the circuit breaker back to the ON position.
See the section, “Adding Memory,” in Chapter 3, “Upgrading the System,” for important
details on handling DIMMs. The DIMM sockets are located just above the power connectors
P1 and P2 on the system board. See the system board diagrams in Chapter 5, “System
Board,” for connector and socket locations.
To replace a DIMM:
1. Access the DIMM sockets. See Chapter 1, “Accessing the Components,” for details.
2. Press the release tabs outward, away from each other.
3. Grasp the top edge of the DIMM and pull it out of the socket.
4. Remove the new DIMM from the antistatic package.
5. Orient the DIMM so that the notches match the keys in the socket.
DIMM
Release Tab Notch
6. Insert the DIMM at a 90-degree angle (vertical to the system board) into the socket.
7. Push gently straight down until the release tabs snap into place.
DIMM socket
16
System Board (MSMT497A)
This section describes how to replace the system board MSMT497A. The replacement board
comes with no processors or memory. After installation, you will remove the processors and
memory from the old board and install them on the new board. See the system board
diagrams in Chapter 5, “System Board,” for connector and socket locations.
Several Fastex fasteners are mounted in the right side of the chassis to secure the system
board and dual processor retention module (DPRM) supports. Do not overtighten the screws
to these fasteners. If you do, the fasteners may distort.
Hole in right side of chassis
Fas tex fastener
To remove the system board:
1. Remove the right side panel. The following figure shows the sytem board.
2. Note the location and orientation of all cables connected to the option cards to ensure
proper reinstallation. Remove the option cards and place on an antistatic surface.
3. Lay the chassis down on its left side.
4. Note the locations where all cables connect to the system board.
5. Disconnect the power cables from the center of the system board. Disconnect the EIDE,
floppy, and SCSI cables from the board. Disconnect any other cables from the board.
6. Remove the processor fan duct by removing 3 screws at the back of the chassis.
7. Remove the eight single jackscrews mounted in the I/O panel area. These are used to
secure the D-Shell I/O ports to the I/O panel.
WARNING Use care when removing or installing the screws to avoid damaging components on
the system board.
8. Remove the 19 screws holding the system board in place. Remove the six crews
securing the dual Pentium II processor support bracket, and then remove the processor
support bracket; retain it for reinstallation. Remove the remainder of the screws and
retain them for reinstallation.
9. Carefully remove the system board and place on an antistatic surface or in an antistatic
bag.
To install a new system board:
17
1. Remove the new system board from its antistatic packaging and orient it in the proper
way to install in the chassis.
2. Carefully set the new system board into the system, ensuring that the I/O ports are in
their proper locations against the I./O panel.
3. Reinstall the jack screws in the I/O panel locations where they were removed previously.
4. Install 13 of the screws used to secure the system board in place.
5. Install the dual processor support bracket using the remaining 6 screws.
6. Remove the processor(s), processor terminator or VRM (if installed), and memory
DIMM(s) from the old system board and install on the new system board in their
respective location(s).
7. Attach all internal cables to the system board that were disconnected earlier. If you need
help identifying cable connections, see Chapter 5, “System Board.”
8. Install the option cards in their original slots and secure them in place with the screws
removed previously.
9. Stand the unit up and reinstall the right side panel.
10. Attach all applicable external peripheral cables (mouse, keyboard, monitor, etc.).
18
Power Distribution Board (MSMT498 or MSMT499)
The power distribution board assembly contains the board, a metal support bracket, and
cables. If the power distribution board fails, the assembly is replaced as one unit.
u
Power Distribution Board MSMT498 is used for redundant power supplies.
u
Power Distribution Board MSMT499 is used for fixed power supply.
To replace the power distribution board assembly:
1. Remove the left and right side panels. The following figure shows the power
distribution board from the right side.
Power Distribution Board
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