IBM NetVista Owner's manual

IBM NetVista Type 6838, 6848
Hardware Maintenance Manual


IBM NetVista Type 6838, 6848
Hardware Maintenance Manual


:
Note: Before using this information and the product it supports, be sure to read the general information under “Notices” on
page 119.
First Edition (November 2000)
INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION ″AS IS″WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied
warranties in certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information
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the product(s) and/or the program(s) described in this publication at any time.
This publication was developed for products and services offered in the United States of America. IBM may not offer the products,
services, or features discussed in this document in other countries, and the information is subject to change without notice.
Consult your local IBM representative for information on the products, services, and features available in your area.
Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing representative.
IBM NetVista Type 6838, 6848 Hardware Maintenance Manual
© Copyright International Business Machines Corporation 2000. All rights reserved.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

About this manual
This manual contains diagnostic information, a Symptom-to-FRU index, service
information, error indications, and configuration information for the IBM NetVista
Type 6838 and Type 6848 computers.
Attention: This manual is intended for trained servicers who are familiar with
IBM PC computer products.
Important safety information
Be sure to read all caution and danger statements in this book before performing
any of the instructions.
Leia todas as instruções de cuidado e perigo antes de executar qualquer operação.
Prenez connaissance de toutes les consignes de type Attention et
Danger avant de procéder aux opérations décrites par les instructions.
© Copyright IBM Corp. 2000 iii

Lesen Sie alle Sicherheitshinweise, bevor Sie eine Anweisung ausführen.
Accertarsi di leggere tutti gli avvisi di attenzione e di pericolo prima di effettuare
qualsiasi operazione.
Lea atentamente todas las declaraciones de precaución y peligro ante de llevar a
cabo cualquier operación.
Online support
Use the World Wide Web (WWW) to download Diagnostic, BIOS Flash, and Device
Driver files, and Documents.
The Web address is:
http://www.ibm.com/support
iv IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

Contents
About this manual ..........iii
Important safety information ........iii
Online support .............iv
Chapter 1. General checkout ......1
Chapter 2. General information.....3
Features and specifications for Type 6838 .....4
Features and specifications for Type 6848 .....5
Chapter 3. Diagnostics........7
POST .................7
POST beep code descriptions ........7
Small computer system interface messages (some
models) ................7
IBM Enhanced Diagnostics .........8
Textmessages.............9
Starting the diagnostic programs.......9
Using the diagnostics CD........10
Downloading the diagnostics program . . . 10
Using the diagnostic diskette ......10
Viewing the test log ..........11
System board memory...........11
RIMM diagnostic approach ........13
Recovering your operating system and preinstalled
software...............13
Recovering BIOS ...........14
Recovering or installing device drivers ....15
Recovering your operating system......16
Performing a partial or full recovery ....16
UsingNortonAntiVirusforIBM......17
Using the ConfigSafe program .......17
ClearingCMOS.............17
Replacing the battery ...........17
Chapter 4. Configuration .......19
Using the Configuration/Setup Utility program . . 19
Starting the Configuration/Setup Utility program 19
Choices available from the Configuration/Setup
Utility main menu ...........19
Usingpasswords...........22
Using the SCSISelect Utility program (some models) 22
Starting the SCSISelect Utility program ....22
Choices available from the SCSISelect menu . . 22
Chapter 5. Installing options Type 6838,
6848................25
Beforeyoubegin ............25
System reliability considerations ......25
I/O connector/port locations - Type 6838 and 6848 26
Removingthecover...........26
Internal drive removal and replacement .....27
Installing internal drives in bays 1, 2 and 3 . . . 28
CD-ROM drive jumper settings......29
Installing internal drives in bays 4, 5, 6 and 7 . . 30
Hard disk drive jumper settings .....32
Installing a security U-bolt .........32
Installing memory modules .........33
Installing adapters ............35
Adapter slots .............35
AGP adapter .............37
Audio adapter ............38
ADSL modem ............38
Replacingthecover............38
Chapter 6. FRU information (service
only)................39
Types 6838 and 6848 removals ........39
System board layout ..........39
System board jumper settings ......39
System board memory.........40
RIMM diagnostic approach .......42
Replacing a system board ........42
Replacing a processor ..........43
Speaker removal............43
Power supply ............44
20-pin main power supply connection . . . 44
6-pin power supply connection ......45
4-pin power supply connection ......45
Power supply removal.........46
Chapter 7. Symptom-to-FRU index . . . 47
RIMMmemoryerrors...........48
Hard disk drive boot error .........48
Beepsymptoms.............48
Diagnostic error codes...........49
POST error codes ............66
Miscellaneous error messages ........69
Undetermined problems ..........71
Security features.............71
Passwords..............71
Power-onpassword .........72
Removingapower-onpassword.....72
Administrator password ........72
Administrator password control .....72
Operating system password .......72
Vital product data ...........72
Management Information Format (MIF) ....73
Alert on LAN ............73
BIOSlevels..............73
Flash (BIOS/VPD) update procedure ......74
Flash recovery boot block jumper .......74
Power management ...........75
Automatic configuration and power interface
(ACPI) BIOS .............75
Advanced Power Management .......75
Automatic Hardware Power Management
features...............75
© Copyright IBM Corp. 2000 v

Setting Automatic Hardware Power Management
features...............76
AutomaticPower-Onfeatures.......76
Network settings ............77
Flash over LAN (update POST/BIOS over network) 77
WakeonLAN.............77
Chapter 8. Parts listing........79
System, Type 6838 ............79
Keyboards...............81
Powercords..............82
System, Type 6848 ............83
Keyboards...............85
Powercords..............86
Chapter 9. Related service information 87
Safety information ............87
General safety ............87
Electrical safety ............88
Safety inspection guide .........89
Handling electrostatic discharge-sensitive devices 90
Grounding requirements .........91
Safety notices (multi-lingual translations) . . . 91
Send us your comments! .........118
Problem determination tips.........119
Notices ...............119
Trademarks..............120
vi IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

Chapter 1. General checkout
This general checkout procedure is for type 6838, 6848 computers.
Attention:
The drives in the computer you are servicing might have been rearranged or the drive startup sequence changed. Be
extremely careful during write operations such as copying, saving or formatting. Data or programs can be
overwritten if you select an incorrect drive.
Diagnostic error messages appear when a test program finds a problem with a
hardware option. For the test programs to properly determine if a test Passed,Failed
or Aborted, the test programs check the error-return code at test completion. See
Chapter 3, “Diagnostics”, on page 7.
General error messages appear if a problem or conflict is found by an application
program, the operating system, or both. For an explanation of these messages, refer
to the information supplied with that software package.
Notes:
vType 6838, 6848 computers default to come up quiet (no beep and no memory count and checkpoint code
display) when no errors are detected by POST.
vTo enable beep and memory count and checkpoint code display when a successful POST occurs, do the following:
1. Select Start Options in the Configuration/Setup Utility program (see “Using the Configuration/Setup Utility
program” on page 19).
2. Set Power-On Self-Test to Enhanced.
vBefore replacing any FRUs, ensure that the latest level of BIOS is installed on the system. A down-level BIOS
might cause false errors and unnecessary replacement of the system board.
vIf multiple error codes are displayed, diagnose the first error code displayed.
vIf the computer hangs and no error is displayed, go to “Undetermined problems” on page 71.
vIf an installed device is not recognized by the diagnostics program, that device might be defective.
001
1. Power-off the computer and all external devices.
2. Check all cables and power cords.
3. Make sure the system board is seated properly.
4. Set all display controls to the middle position.
5. Power-on all external devices.
6. Power-on the computer.
7. Check for the following response:
vReadable instructions or the Main Menu.
DID YOU RECEIVE THE CORRECT RESPONSE?
If NO, continue to 002.
If YES, proceed to 003.
002
© Copyright IBM Corp. 2000 1

If the Power Management feature is enabled, do the following:
1. Start the Configuration/Setup Utility program (see “Starting the
Configuration/Setup Utility program” on page 19.)
2. Select Power Management from the Configuration/Setup Utility program
menu.
3. Select APM.
4. Be sure APM BIOS Mode is set to Disabled. If it is not, press Left Arrow (←)or
Right Arrow (→) to change the setting.
5. Select Automatic Hardware Power Management.
6. Set Automatic Hardware Power Management to Disabled.
7. If the problem persists, continue to 003.
003
Run the Diagnostic programs. If necessary, refer to “Starting the diagnostic
programs” on page 9.
vIf you receive an error, replace the part that the diagnostic program calls out or
go to Chapter 3, “Diagnostics”, on page 7.
vIf the test stops and you cannot continue, replace the last device tested.
2IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

Chapter 2. General information
Features and specifications for Type 6838 .....4 Featuresandspecifications for Type 6848 .....5
© Copyright IBM Corp. 2000 3

Features and specifications for Type 6838
The following table provides a summary of the features and specifications for the
tower model. Some features and specifications might not apply.
Microprocessor:
vIntel®Pentium®4 with 256 KB
Level-2 cache
Memory:
vMinimum: 128 MB
vMaximum: 2.0 GB
vType: PC600 or PC800 Rambus
RIMMs only
vSlots: 4 dual inline
Drives: (depending on your model)
vDiskette: 1.44 MB
vCD-ROM: IDE
vHard disk drive
Expansion bays:
vTwo 5.25-in. bays (1 CD-ROM drive
installed)
vTwo 3.5-in. bays (1 diskette drive
installed)
vThree 3.5-in. slim-high bays
available (1 hard disk drive
installed)
PCI expansion slots:
vThree 33 MHz/32-bit on the system
board (some models come with a
SCSI adapter installed)
vTwo 33 MHz/32-bit on the PCI Bus
extender board
AGP slot: Accelerated graphics port
(AGP)
vVideo adapter installed on the
system board
Power supply:
One 340 watt (90-240 V ac)
Video: (depending on your model)
vNVidia AGP4 with 16 MB
SDRAM video
vNVidia GeForce2 with 32 MB
SDRAM video memory
Size:
vHeight: 470 mm (18.5 in.)
vDepth: 508 mm (19.9 in.)
vWidth: 165 mm (6.5 in.)
vWeight: approximately 19.5 Kg (43
lb.) when fully configured or 15.9
Kg (35 lb.) minimum
Integrated functions:
v10BASE-T/100BASE-TX Ethernet
controller on the system board
with an RJ-45 Ethernet port
vTwo serial ports
vOne parallel port
vFour USB ports
vKeyboard port
vMouse port
vMIDI port
vAudio ports
– Line out
–Linein
–Mic
vDual-channel bus mastering IDE
controller
Acoustical noise emissions:
vSound power, idling: 6.6 bel
maximum
vSound power, operating: 6.8 bel
maximum
Environment:
vAir temperature:
– Computer on: 10° to 35° C (50.0°
to 95.0° F). Altitude: 0 to 914 m
(2998.7 ft.)
– Computer on: 10° to 32° C (50.0°
to 89.6° F). Altitude: 914 m
(2998.7 ft.) to 2133 m (6998.0 ft.)
– Computer off: 10° to 43° C (50.0°
to 109.4° F). Maximum altitude:
2133 m (6998.0 ft.)
vHumidity:
– Computer on: 8% to 80%
– Computer off: 8% to 80%
Heat output:
Approximate heat output in British
Thermal Units (Btu) per hour
vMinimum configuration: 341 Btu
(100 watts)
vMaximum configuration: 1604 Btu
(470 watts)
Electrical input:
vSine-wave input (50-60 Hz) required
vInput voltage low range:
– Minimum: 90 V ac
– Maximum: 137 V ac
vInput voltage high range:
– Minimum: 180 V ac
– Maximum: 265 V ac
vInput kilovolt-amperes (kVA)
approximately:
– Minimum: 0.08 kVA
– Maximum: 0.52 kVA
4IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

Features and specifications for Type 6848
The following table provides a summary of the features and specifications for the
tower model. Some features and specifications might not apply.
Microprocessor:
vIntel®Pentium®4 with 256 KB
Level-2 cache
Memory:
vMinimum: 128 MB
vMaximum: 2.0 GB
vType: PC600 or PC800 Rambus
RIMMs only
vSlots: 4 dual inline
Drives: (depending on your model)
vDiskette: 1.44 MB
vCD-ROM: IDE
vHard disk drive
Expansion bays:
vTwo 5.25-in. bays (1 CD-ROM drive
installed)
vTwo 3.5-in. bays (1 diskette drive
installed)
vThree 3.5-in. slim-high bays
available (1 hard disk drive
installed)
PCI expansion slots:
vThree 33 MHz/32-bit on the system
board (some models come with a
SCSI adapter installed)
vTwo 33 MHz/32-bit on the PCI Bus
extender board
AGP slot: Accelerated graphics port
(AGP)
vVideo adapter installed on the
system board
Power supply:
One 340 watt (90-240 V ac)
Video: (depending on your model)
vATI Radeon with 32 MB SDRAM
video memory
vNV11 with 32 MB SDRAM video
memory and TV OUT
Size:
vHeight: 470 mm (18.5 in.)
vDepth: 508 mm (19.9 in.)
vWidth: 165 mm (6.5 in.)
vWeight: approximately 19.5 Kg (43
lb.) when fully configured or 15.9
Kg (35 lb.) minimum
Integrated functions:
v10BASE-T/100BASE-TX Ethernet
controller on the system board
with an RJ-45 Ethernet port
vTwo serial ports
vOne parallel port
vFour USB ports
vKeyboard port
vMouse port
vMIDI port
vAudio ports
– Line out
–Linein
–Mic
vDual-channel bus mastering IDE
controller
Acoustical noise emissions:
vSound power, idling: 6.6 bel
maximum
vSound power, operating: 6.8 bel
maximum
Environment:
vAir temperature:
– Computer on: 10° to 35° C (50.0°
to 95.0° F). Altitude: 0 to 914 m
(2998.7 ft.)
– Computer on: 10° to 32° C (50.0°
to 89.6° F). Altitude: 914 m
(2998.7 ft.) to 2133 m (6998.0 ft.)
– Computer off: 10° to 43° C (50.0°
to 109.4° F). Maximum altitude:
2133 m (6998.0 ft.)
vHumidity:
– Computer on: 8% to 80%
– Computer off: 8% to 80%
Heat output:
Approximate heat output in British
Thermal Units (Btu) per hour
vMinimum configuration: 341 Btu
(100 watts)
vMaximum configuration: 1604 Btu
(470 watts)
Electrical input:
vSine-wave input (50-60 Hz) required
vInput voltage low range:
– Minimum: 90 V ac
– Maximum: 137 V ac
vInput voltage high range:
– Minimum: 180 V ac
– Maximum: 265 V ac
vInput kilovolt-amperes (kVA)
approximately:
– Minimum: 0.08 kVA
– Maximum: 0.52 kVA
Chapter 2. General information 5

6IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

Chapter 3. Diagnostics
POST .................7
POST beep code descriptions ........7
Small computer system interface messages (some
models) ................7
IBM Enhanced Diagnostics .........8
Textmessages.............9
Starting the diagnostic programs.......9
Using the diagnostics CD........10
Downloading the diagnostics program . . . 10
Using the diagnostic diskette ......10
Viewing the test log ..........11
System board memory...........11
RIMM diagnostic approach ........13
Recovering your operating system and preinstalled
software...............13
Recovering BIOS ...........14
Recovering or installing device drivers ....15
Recovering your operating system......16
Performing a partial or full recovery ....16
Installing alternate operating systems. . . 17
UsingNortonAntiVirusforIBM......17
Using the ConfigSafe program .......17
ClearingCMOS.............17
Replacing the battery ...........17
POST
When you turn on the computer, it performs a series of tests to check the operation
of system components and some of the options that are installed in the computer.
This series of tests is called the power-on self-test or POST.
If POST finishes without detecting any problems, the first window of your
operating system or application program appears.
Notes:
1. If you have a power-on password set, you must type the password and press
Enter, when prompted, before POST will continue.
2. A single problem might cause several error messages. When this occurs, work
to correct the cause of the first error message. After you correct the cause of the
first error message, the other error messages usually will not occur the next
time you run the test.
POST beep code descriptions
The possible types of beep codes that your system might emit are:
Repeating long beeps
Indicates that a memory error has occurred. Ensure that all RIMMs are
correctly installed.
One long beep and two short beeps
Indicates that a video error has occurred and the BIOS cannot initialize the
video screen to display any additional information. Ensure that the video
adapter is correctly installed.
Small computer system interface messages (some models)
The following table lists actions to take if you receive any error message.
Note: If your system does not have a hard disk drive, ignore any message that
indicates that the BIOS is not installed.
© Copyright IBM Corp. 2000 7

You will get these messages only when running the SCSISelect Utility.
Table 1. SCSI messages
SCSI Messages Description
All One or more of the following might be causing the problem.
vA failing SCSI device (adapter or drive)
vAn improper SCSI configuration
vDuplicate SCSI IDs in the same SCSI chain
vAn improperly installed SCSI terminator
vA defective SCSI terminator
vAn improperly installed cable
vA defective cable
Action: Verify that:
vThe external SCSI devices are turned on. External SCSI devices must
be turned on before the computer.
vThe cables for all external SCSI devices are connected correctly.
vThe last device in each SCSI chain is terminated properly.
vThe SCSI devices are configured correctly.
If the above items are correct, run the diagnostic programs to obtain
additional information about the failing device.
IBM Enhanced Diagnostics
The system diagnostic programs are stored on the Device Drivers and IBM Enhanced
Diagnostics CD. These programs are the primary method of testing the major
components of your computer.
Diagnostic error messages indicate that a problem exists; they are not intended to
be used to identify a failing part. Troubleshooting and servicing of complex
problems that are indicated by error messages should be performed by trained
service personnel.
Sometimes the first error to occur causes additional errors. In this case, the
computer displays more than one error message. Always follow the suggested
action instructions for the first error message that appears.
The following sections contain the error codes that might appear in the detailed
test log and summary log, when running the diagnostic programs.
The error code format is as follows:
fff-ttt-iii-date-cc-text message
where:
fff is the three-digit function code that indicates the function being tested
when the error occurred. For example, function code 089 is for the
microprocessor.
ttt is the three-digit failure code that indicates the exact test failure that was
encountered. (These codes are for trained service personnel and are
described in the Hardware Maintenance Manual.)
8IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

iii is the three-digit device ID. (These codes are for trained service personnel
and are described in the Hardware Maintenance Manual.)
date is the date that the diagnostic test was run and the error recorded.
cc are the check digits that are used to verify the validity of the information.
text message
is the diagnostic message that indicates the reason for the problem.
Text messages
The diagnostic text message format is as follows:
Function Name: Result (test specific string)
where:
Function Name
is the name of the function being tested when the error occurred. This
corresponds to the function code (fff) given in the previous list.
Result can be one of the following:
Passed
This result occurs when the diagnostic test completes without any
errors.
Failed This result occurs when the diagnostic test discovers an error.
User Aborted
This result occurs when you stop the diagnostic test before it is
complete.
Not Applicable
This result occurs when you specify a diagnostic test for a device
that is not present.
Aborted
This result occurs when the test could not proceed because of the
system configuration.
Warning
This result occurs when a possible problem is reported during the
diagnostic test, such as when a device that is to be tested is not
installed.
Test Specific String
is additional information that is used to analyze the problem.
Starting the diagnostic programs
The IBM Enhanced Diagnostics programs will isolate your computer hardware
from software that you have installed on your hard disk drive. The programs run
independently of the operating system, and must be run either from a CD or diskette.
This method of testing is generally used when other methods are not accessible or
have not been successful in isolating a problem suspected to be hardware related.
ADevice Drivers and IBM Enhanced Diagnostics CD comes with your computer. You
can also download the latest diskette image of the diagnostics from
http://www.ibm.com/pc/support on the World Wide Web.
Chapter 3. Diagnostics 9

Using the diagnostics CD
Complete the following steps to start the IBM Enhanced Diagnostics using the CD:
1. Turn off your computer and any attached devices.
2. Turn on all attached devices; then, turn on your computer.
3. When you see Press F1 For Configuration/Setup, press the F1 key.
4. When the Configuration/Setup Utility menu appears, select Boot.
5. Change the First Boot Device to the appropriate CD-ROM.
6. Note the device selected as the First Startup Device. Later, you must restore this
setting.
7. Press Esc one time to return to the Configuration/Setup Utility menu.
8. Select Exit from the main menu
Important:
When you finish running the diagnostics and utilities, remove the CD from the
CD-ROM drive and turn off the computer. You must restore the First Startup
Device to the original settings. Use steps 2 through 7 of this procedure to do
this.
9. Save your configuration.
Downloading the diagnostics program
Complete the following steps to download the latest image of the IBM Enhanced
Diagnostics from the World Wide Web and create a startable Enhanced Diagnostics
diskette:
1. Go to the following World Wide Web site: http://www.ibm.com/pc/support/
2. Download the diagnostics file for your computer to a hard disk drive directory
(not to a diskette).
3. Go to a DOS prompt and change to the directory where the file was
downloaded.
4. Insert a blank high-density diskette in diskette drive A.
5. Type in the following, and then press Enter: filename a: where filename is the
name of the file you downloaded from the Web.
The downloaded file is self-extracting and will be copied to the diskette. When the
copy completes, you have a startable IBM Enhanced Diagnostics diskette.
Using the diagnostic diskette
Complete the following steps to start the IBM Enhanced Diagnostics using the
diagnostics diskette:
1. Turn off your computer and any attached devices.
2. Insert the IBM Enhanced Diagnostics diskette into the diskette drive.
3. Turn on all attached devices; then, turn on your computer.
4. Follow the instructions on the screen.
5. Place the Device Drivers and IBM Enhanced Diagnostics CD in the CD-ROM
drive. The diagnostics will load. Follow the instructions on the screen to run
the diagnostics.
When the tests have completed, you can view the Test Log by selecting Utility
from the top of the screen.
If the hardware checks out OK but the problem persists during normal computer
operations, a software error might be the cause. If you suspect a software problem,
refer to the information that comes with the software package.
10 IBM NetVista Type 6838, 6848: Hardware Maintenance Manual

Viewing the test log
The test log records data about system failures and other pertinent information.
The test log will not contain any information until after the diagnostic program has
run.
Note: If you already are running the diagnostic programs, begin with step 4.
Complete the following steps to view the test log:
1. Insert the IBM Enhanced Diagnostics CD.
2. Turn on the computer and watch the screen.
If the system is on, shut down your operating system and restart the system.
3. If a power-on password is set, the system prompts you for it. Type in the
appropriate password; then, press Enter.
4. Run the appropriate diagnostics program and when the Diagnostic Programs
screen appears, select Utility.
5. Select View Test Log from the list that appears; then, follow the instructions on
the screen.
6. You can save the test log to a file on a diskette or to your hard disk drive.
Note: The system maintains the test-log data while the system is powered on.
When you turn off the power to the computer, the test log is cleared.
System board memory
RIMM connector 1
RIMM connector 2
RIMM connector 3
RIMM connector 4
Retaining clip
Rambus inline memory modules (RIMMs)
The IBM-installed RIMMs are ECC (error checking and correction) RDRAM
(Rambus dynamic random access memory) modules.
Chapter 3. Diagnostics 11

When installing or replacing RIMMs, take the following information into
consideration:
vRIMM connectors do not support dual inline memory modules (DIMMs)
vUse only PC600 or PC800 RIMMs.
vRIMMs must be installed in pairs. The RIMMs installed in a RIMM connector
pair must be of the same speed, and size.
vAny connector that does not have a RIMM installed must have a continuity
RIMM (C-RIMM).
vInstall only ECC RIMMS to enable ECC. If ECC and non-ECC memory are used
together, the memory will function as non-ECC memory.
Note: If PC600 and PC800 RIMMs are used together, all memory will function at
the speed of the slowest RIMM.
Memory placement for 4-RIMM Memory Card
2 RIMMs
4 RIMMs
4
RIMM
C-RIMM
3
C-RIMM
RIMM
1
RIMM
RIMM
2
RIMM
RIMM
Note: Memory must be installed in matched pairs.
Pair 1 Pair 2
The following matrix cross-references the name of the computer (printed on the
logo) and the size, speed, and type of memory modules supported in the
computer.
Note: RAMBUS inline memory module (RIMM) is used in the type 6838 and 6848
computers. RIMM modules are not compatible with SIMM or DIMM
memory modules. Refer to the information below regarding RIMM memory
for types 6838 and 6848.
Computer Name RIMM Memory Module
Size Memory Type
NetVista Types 6838, 6848 64 MB 128 MB 256
MB 512 MB
PC600 PC800 RDRAM
ECC/Non-ECC
Supported RIMM memory configuration
Types 6838 and 6848 have two memory channels with two memory sockets for
each channel, making a total of four RIMM memory sockets. RIMM sockets must
have a RIMM memory module or a C-RIMM (RIMM Continuity module) installed.
There can be no empty RIMM sockets. RIMM sockets must contain either a RIMM
or a C-RIMM. At least one socket from each memory channel must have a RIMM
memory module installed.
Note: Both memory channels must be populated the same.
vRIMM sockets 1 and 3 are on memory channel A.
vRIMM sockets 2 and 4 are on memory channel B.
Each RIMM socket supports a maximum of 512 MB of memory.
vIf new memory is to be added in a memory channel, remove a C-RIMM and
install the new RIMM. (You must also do the same with the other memory
Channel).
vIf memory is to be removed from a memory channel, remove the RIMM and
install a C-RIMM. (You must also do the same with the other memory Channel).
12 IBM NetVista Type 6838, 6848: Hardware Maintenance Manual