Dell PowerEdge 6850 User guide

Dell™PowerEdge™6850SystemsInstallationandTroubleshootingGuide
Introduction
Indicators, Messages, and Codes
Finding Software Solutions
Running the System Diagnostics
Troubleshooting Your System
Installing System Components
Installing Drives
Getting Help
Jumpers, Switches, and Connectors
I/O Connectors
Service-Only Parts Replacement Procedures
Notes, Notices, and Cautions
Abbreviations and Acronyms
For a complete list of abbreviations and acronyms, see the Glossary in your User's Guide.
Information in this document is subject to change without notice.
©2005DellInc.Allrightsreserved.
Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, PowerEdge, PowerVault, Dell OpenManage, Dimension, Inspiron, OptiPlex, Latitude, Dell Precision, PowerApp, PowerConnect, and DellNet
are trademarks of Dell Inc.; Intel is a registered trademark and Xeon is a trademark of Intel Corporation.
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 Inc. disclaims any
proprietary interest in trademarks and trade names other than its own.
Initial release: 28 Mar 2005

NOTE: A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

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Jumpers, Switches, and Connectors
Dell™PowerEdge™6850SystemsInstallationandTroubleshootingGuide
Jumpers—A General Explanation
System Board Jumpers
System Board Connectors
Memory Riser Card Connectors
SCSI Backplane Connectors
Disabling a Forgotten Password
This section provides specific information about the system jumpers. It also provides some basic information on jumpers and switches and describes the
connectors on the various boards in the system.
Jumpers—A General Explanation
Jumpers provide a convenient and reversible way of reconfiguring the circuitry on a printed circuit board. When reconfiguring the system, you may need to
change jumper settings on circuit boards or drives.

Jumpers
Jumpers are small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The wire connects
the pins and creates a circuit. To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated. FigureA-1 shows an
example of a jumper.
Figure A-1. Example Jumper
A jumper is referred to as open or unjumpered when the plug is pushed down over only one pin or if there is no plug at all. When the plug is pushed down
over two pins, the jumper is referred to as jumpered. The jumper setting is often shown in text as two numbers, such as 1–2. The number 1 is printed on the
circuitboardwithatrianglesothatyoucanidentifyeachpinnumberbasedonthelocationofpin1.
FigureA-2 shows the location and default settings of the server-module jumper blocks. See TableA-1 for the designations, default settings, and functions of
the jumpers.
System Board Jumpers
FigureA-2 shows the location of the configuration jumpers on the system board. TableA-1 lists the jumper settings.
Figure A-2. System Board Jumpers
NOTE: To access the jumpers, remove any expansion cards installed in slots 6 and 7. See FigureA-3.

Table A-1.SystemBoardJumperSettings
System Board Connectors
See FigureA-3 and TableA-2 for the location and description of the system board connectors.
Figure A-3. System Board Connectors

Jumper

Setting

Description
PASSWD
(default)
The password feature is enabled.
The password feature is disabled.
NVRAM_CLR
(default)
The configuration settings in NVRAM are retained at system boot.
The configuration settings in NVRAM are cleared at next system boot.

Table A-2.SystemBoardConnectors
Memory Riser Card Connectors
See FigureA-4 for the location of the connectors on the memory riser card.
Figure A-4. Memory Riser Card Connectors

Connector

Description
BATTERY
Connector for the 3.0-V coin battery
BKPLN SIG
Backplane interface cable connector
PROC_n
Processor connector (4)
CPU3 VRM, CPU4 VRM
Voltage regulator modules (VRMs) for processors 3 and 4
CPU 3&4 CACHE VRM
Reserved
FIBRE CHAN
Integrated Fiber Channel module card
MEM A, B, C, D
Memory riser card connector (4)
NVRAM_CLR
NVRAM jumper. See TableA-1.
PASSWD
Password jumper. See TableA-1.
SCSI_A, SCSI_B
Connectors for the integrated SCSI controller (2)
SLOT n
Expansion slot connector (7)
RAID_BAT
Connector for the optional RAID battery
RAID_DIMM
Connector for the optional RAID memory module
RAID_KEY
Connector for the optional RAID key
RMC
Connector for the remote access controller (RAC)

SCSI Backplane Connectors
See FigureA-5 for the location and description of the connectors on the back of the SCSI backplane board.
Figure A-5. Connectors on Back of SCSI Backplane
Disabling a Forgotten Password
Thesystem'ssoftwaresecurityfeaturesincludeasystempasswordandasetuppassword,whicharediscussedindetailin"UsingtheSystemSetupProgram"
in your User's Guide.Thepasswordjumperenablesthesepasswordfeaturesordisablesthemandclearsanypassword(s)currentlyinuse.


1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

2. Open the system. See "Opening the System" in "Troubleshooting Your System."

3. Remove the expansion card from expansion slots 6 and 7, if installed. See "Expansion Cards" in "Installing System Components."

4. Remove the password jumper plug from pins 1 and 2 and place it on pins 2 and 3.
See FigureA-2 to locate the password jumper on the system board.
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5. Replace the expansion cards in expansion slots 6 and 7, if removed. See "Expansion Cards" in "Installing System Components."
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6. Close the system. See "Closing the System" in "Troubleshooting Your System."

7. Reconnect the system to the electrical outlet, and turn on the system.
The existing passwords are not disabled (erased) until the system boots with the password jumper plug on pins 2 and 3. However, before you assign a
new system and/or setup password, you must install the jumper plug on pins 1 and 2.

8. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.

9. Open the system. See "Opening the System" in "Troubleshooting Your System."

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as
authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not
authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
NOTE: If you assign a new system and/or setup password with the jumper plug still removed, the system disables the new password(s) the next
time it boots.

10. Remove the expansion cards from expansion slots 6 and 7, if installed. See "Expansion Cards" in "Installing System Components."

11. Reinstall the password jumper plug on pins 1 and 2 to enable the password protection feature.

12. Replace the expansion cards in expansion slots 6 and 7, if removed. See "Expansion Cards" in "Installing System Components."

13. Close the system, reconnect the system to the electrical outlet, and turn on the system.

14. Assign a new system and/or setup password.
To assign a new password using the System Setup program, see "Using the System Setup Program" in your User's Guide.
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

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I/O Connectors
Dell™PowerEdge™6850SystemsInstallationandTroubleshootingGuide
Serial Connector
Video Connector
USB Connectors
Integrated NIC Connectors
Network Cable Requirements
I/O connectors are the gateways that the system uses to communicate with external devices, such as a keyboard, mouse, printer, or monitor. This section
describes the various connectors on your system. If you reconfigure the hardware connected to the system, you may also need the pin number and signal
information for these connectors. FigureB-1 illustrates the connectors on the system.
Figure B-1. I/O Connectors
TableB-1 shows the icons used to label the connectors on the system.
Table B-1. I/O Connector Icons
Serial Connector
Serial connectors support devices such as external modems, printers, and mice that require serial data transmission. The serial connector is also used by the
BMC to provide remote access to the system. The serial connector uses a 9-pin D-subminiature connector.

Serial Connector Autoconfiguration
The default designation of the integrated serial connector is COM1. When you add an expansion card containing a serial connector that has the same
designation as the integrated connector, the system's autoconfiguration feature remaps (reassigns) the integrated serial connector to the next available
designation. Both the new and the remapped COM connectors share the same IRQ setting. COM1 and COM3 share IRQ4, while COM2 and COM4 share IRQ3.
Before adding a card that remaps the COM connectors, check the documentation that came with the software to make sure that the software can
accommodate the new COM connector designation.
FigureB-2 illustrates the pin numbers for the serial connector and TableB-2 defines the pin assignments for the connector.
Figure B-2. Serial Connector Pin Numbers

Icon

Connector
Serial connector
Video connector
USB connector
NIC connector
NOTE: If two COM connectors share an IRQ setting, you may not be able to use them both at the same time. In addition, if you install one or more
expansion cards with serial connectors designated as COM1 and COM3, the integrated serial connector is disabled.

Table B-2.SerialConnectorPinAssignments
Video Connector
You can attach a VGA-compatible monitor to the system's integrated video controller using a 15-pin high-density D-subminiature connector on the system front
or back panel. FigureB-3 illustrates the pin numbers for the video connector and TableB-3 defines the pin assignments for the connector.
Figure B-3. Video Connector Pin Numbers
Table B-3. Video Connector Pin Assignments
USB Connectors
The system's USB connectors support USB-compliant peripherals such as keyboards, mice, and printers and may also support USB-compliant devices such as
diskette drives and optical drives. FigureB-4 illustrates the pin numbers for the USB connector and TableB-4 defines the pin assignments for the connector.

Pin

Signal

I/O

Definition
1
DCD
I
Data carrier detect
2
SIN
I
Serial input
3
SOUT
O
Serial output
4
DTR
O
Data terminal ready
5
GND
N/A
Signal ground
6
DSR
I
Data set ready
7
RTS
O
Request to send
8
CTS
I
Clear to send
9
RI
I
Ring indicator
Shell
N/A
N/A
Chassis ground
NOTE: Installing a video card automatically disables the system's integrated video controller.

Pin

Signal

I/O

Definition
1
RED
O
Red video
2
GREEN
O
Green video
3
BLUE
O
Blue video
4
NC
N/A
No connection
5–8, 10
GND
N/A
Signal ground
9
VCC
N/A
Vcc
11
NC
N/A
No connection
12
DDC data out
O
Monitor detect data
13
HSYNC
O
Horizontal synchronization
14
VSYNC
O
Vertical synchronization
15
NC
N/A
No connection
NOTICE: Do not attach a USB device or a combination of USB devices that draw a maximum current of more than 500 mA per channel or +5 V. Attaching
devices that exceed this threshold may cause the USB connectors to shut down. See the documentation that accompanied the USB devices for their
maximum current ratings.

Figure B-4. USB Connector Pin Numbers
Table B-4. USB Connector Pin Assignments
Integrated NIC Connectors
Each of the system's integrated NICs function as a separate network expansion card while providing fast communication between servers and workstations.
FigureB-5 illustrates the pin numbers for the NIC connector and TableB-5 defines the pin assignments for the connectors.
Figure B-5. NIC Connector
Table B-5. NIC Connector Pin Assignments
Network Cable Requirements
The NIC supports a UTP Ethernet cable equipped with a standard RJ45-compatible plug.
Observe the following cabling restrictions.
lUse Category 5 or greater wiring and connectors.
lDo not exceed a cable run length (from a workstation to a hub) of 100 m (328 ft).
For detailed guidelines on operation of a network, see "Systems Considerations of Multi-Segment Networks" in the IEEE 802.3 standard.
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

Pin

Signal

I/O

Definition
1
Vcc
N/A
Supply voltage
2
DATA
I
Data in
3
+DATA
O
Data out
4
GND
N/A
Signal ground

Pin

Signal

I/O

Definition
1
TD+
O
Data out (+)
2
TD–
O
Data out (–)
3
RD+
I
Data in (+)
4
NC
N/A
No connection
5
NC
N/A
No connection
6
RD–
I
Data in (–)
7
NC
N/A
No connection
8
NC
N/A
No connection
NOTICE: To avoid line interference, voice and data lines must be in separate sheaths.

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Service-Only Parts Replacement Procedures
Dell™PowerEdge™6850SystemsInstallationandTroubleshootingGuide
Before You Begin
Recommended Tools
Control-Panel Assembly
Fan Interposer Board
SCSI Backplane
System Board
Power Distribution Board
Chassis Intrusion Switch
Before You Begin

The procedures in this document require that you remove the cover and work inside the system. While working inside the system, do not attempt to service
the system except as explained in this document and the User's Guide available on support.dell.com. Always follow the instructions closely, and ensure that
you review all safety precautions in the Product Information Guide.
Recommended Tools
You may need the following items to perform the procedures in this section:
l#2 Phillips screwdriver
lWrist grounding strap
Control-Panel Assembly

Removing the Control Panel


1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

2. Open the system. See "Opening the System" in "Troubleshooting Your System."

3. Remove fan 1. See "Removing a System Fan" in "Installing System Components."

4. Remove the three control-panel securing screws from the system front panel. See FigureC-1.

5. Lift the control-panel assembly out of the chassis.

6. Disconnect the control-panel cable from the control-panel assembly.
Figure C-1. Removing and Installing the Control-Panel Assembly
CAUTION: See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting
against electrostatic discharge.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as
authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not
authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.