® Dell® PowerEdge® 6300 Systems SERVICE MANUAL www.dell.
____________________ Information in this document is subject to change without notice. © 1998 Dell Computer Corporation. All rights reserved. Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
CHAPTER 1 System Overview Dell® PowerEdge® 6300 systems are feature-rich, enterprise-class server systems that use Intel® Pentium® II Xeon™ microprocessor(s) with MMX™ technology and incorporate a high-performance PCI local bus. The PowerEdge 6300 systems have been designed for better serviceability and increased reliability. The sliding system board tray allows easy access to the system board for performing processor and memory upgrades.
• A minimum of 128 MB of system memory, upgradable to a maximum of 4 GB by installing combinations of 32-, 128-, and 256-MB buffered EDO DIMMs in the 16 DIMM sockets on the memory board. • BIOS in upgradable flash memory on the PCI bus. • Up to six hot-pluggable SCSI hard-disk drives. Two additional 1-inch drives can be installed in the optional removable media bay. • Three redundant, hot-pluggable power supplies and a power-supply paralleling board (PSPB). • Five redundant system cooling fans.
When following the text in this manual, assume that the location or direction relative to the computer is as shown in Figure 1-1. Figures 1-2 through 1-4 illustrate front-panel, back-panel, and interior features of the PowerEdge 6300 systems. back of computer left side right side front of computer Figure 1-1.
SCSI connector port mouse connector keyboard connector server management bus (SMB) connectors (2) serial port 1 connector AC power receptacles (3) parallel port connector serial port 2 connector video connector expansion slots (7) Figure 1-3.
hard-disk drive cooling fan assembly microprocessors external drive bays (4) memory module hard-disk drive bays (6) SCSI backplane board support panel PCI expansion card system-board fans tray latch system board Figure 1-4.
Accessing the Interior of the System To access the SCSI backplane board or the PSPB, release the system-board tray latch at the back lower corner of the tray (see Figure 1-5) and pull the tray open to the first stop position, or service position). NOTE: From the service position, if you depress and release the tray latch and pull the tray out again, you will come to a second stop position that is used by manufacturing.
System Memory System memory resides on a memory module card and consists of a minimum of 128 MB of 72-bit buffered EDO memory. Memory can be expanded up to 4 GB by installing combinations of 32-, 128-, and 256-MB buffered EDO DIMMs on the memory module. NOTE: DIMMs must be rated at 50 or 60 ns. With a mixture of 50- and 60-ns DIMMs, system memory will run at 60 ns.
See “DIMMs” in Chapter 4 of this document for information on removing and replacing DIMMs. PCI Expansion Subsystem The Resource Configuration Utility (RCU) included with the system automatically configures installed PCI expansion cards. For more information on the RCU, see Chapter 5, “Using the Resource Configuration Utility,” in the Dell PowerEdge 6300 Systems User’s Guide.
SCSI Configuration Guidelines SCSI hard-disk drives must be configured as follows: • Disable termination on the drive. The SCSI backplane board provides termination for the SCSI bus. • Set the SCSI ID on all drives to 0. All SCSI ID numbers for the drives are set by the SCSI backplane board. • Configure the drive so that the drive motor waits for a start unit command from the SCSI host adapter before spinning.
The power supplies can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz. They provide the DC operating voltages and currents listed in Table 1-1. NOTE: The power supplies produce DC voltages only under their loaded condition. Therefore, when you measure these voltages, the DC power connectors must be mated to their PSPB harnesses at the bulkhead, and the harnesses must be connected to their corresponding power input connectors on the PSPB.
external-drives power cable connector (FD) system-board power cable connector (PWR2) system-board power cable connector (PWR1) system-board power cable connector (PWR3) SCSI backplane-board power cable connector (HD_B/P) cable connectors – power supply #1 PS1_PB1 (top) and PS1_PB2 cable connectors – power supply #2 PS2_PB1 (top) and PS2_PB2 cable connectors – power supply #3 PS3_PB1 (top) and PS3_PB2 Figure 1-7. Power-Supply Paralleling Board . Table 1-2.
Pin Assignments for the PSPB Power Connectors The power-supply output voltages can be measured at the back (wire side) of the connectors without disconnecting them. In the following diagrams, voltages for the PSPB PWRx connectors are shown as measured at the system board; voltages for the PSPB FD connector are shown as measured at the PSPB; voltages for the PSPB HD_B/P connector are shown as measured at the SCSI backplane.
+12 VL (yellow) common (black) common (black) +5 VL (red) +5 VL (red) PRES_DET (gray) common (black) 8 9 10 11 12 13 14 1 2 3 4 5 6 7 +5 VL (red) PLANAR_ID (gray) common (black) +3.3 VL (orange) I2C_SCL_EXT (gray) 12C_ALRT_EXT# (gray) I2C_SDA_EXT (gray) Figure 1-9.
NC_I2C_SCL_EXT (gray) NC_I2C_ALRT# (gray) NC_I2C_SDA_EXT (gray) +5 VL (red) common (black) common (black) +5 VL (red) +5 VL (red) 9 10 11 12 13 14 15 16 1 2 P2 3 4 5 6 7 common (black) common (black) +12 VL (yellow) +12 VL (yellow) common (black) common (black) +12 VL (yellow) Figure 1-12. PSPB Power Connector HD_B/P 1-14 8 +3.
System Board Layout The subsections that follow provide service-related information about the system board components. Figure 1-13 illustrates the location of important system board components.
SCSI Backplane Board Layouts Figure 1-14 shows the location of the connectors on the SCSI backplane board. SCA-2–compatible SCSI connectors on reverse side (SLOT0 through SLOT5) Ultra2/LVD SCSI cable connector (SCSI) system-board data cable connector (PLANAR) power input connector (POWER) cooling fan power cable connector (FAN) Figure 1-14.
System Board Jumpers Figure 1-15 illustrates the location of the system board jumpers, and Table 1-3 describes the jumper settings. jumpered unjumpered Figure 1-15.
Table 1-3. Jumper Descriptions Jumper Settings PASSWD Installed (default) to enable the password feature. Remove the jumper and boot the computer to remove an existing password. CARDBIOS Not installed (default) to allow normal boot operation from the system BIOS. Install the jumper only to boot the system from a BIOS expansion card. ISA_CLR Not installed (default) to retain the ISA configuration settings at system boot. Install the jumper and boot the computer to clear the ISA configuration settings.
Table 1-4. Interrupt Assignments (continued) IRQ Line Used/Available IRQ10 Available IRQ11 Available IRQ12 Used by the PS/2 mouse port unless mouse is disabled in System Setup program IRQ13 Used by the math coprocessor IRQ14 Available IRQ15 Used by embedded server-management functions DMA Channel Assignments Table 1-5 lists the default DMA channel assignments. Table 1-5.
Technical Specifications Table 1-6 lists detailed technical specifications. Table 1-6. Technical Specifications Microprocessor Microprocessor type . . . . . . 1 to 4 Intel Pentium II Xeon microprocessors Microprocessor speed . . . . . 400 MHz (100 MHz externally); higher internal speeds when available, all with 100-MHz external speeds Internal cache . . . . . . . . . . . 512-KB, 1-MB, or 2-MB L2 cache Math coprocessor . . . . . . . .
Table 1-6. Technical Specifications (continued) Integrated SCSI Controllers Types . . . . . . . . . . . . . . . . . . two Adaptec AIC-7890 Ultra2/LVD (Fast-40) controllers, with integrated 68-pin SCSI connectors on the system board; Adaptec AIC-7860 Ultra/Narrow controller, with integrated 50-pin SCSI connector on the system board Drives Externally accessible bays . . . . . . . . . . . . . . . . . . . Internally accessible bays . . . . . . . . . . . . . . . . . . . one 3.
Table 1-6. Technical Specifications (continued) Controls and Indicators Power control. . . . . . . . . . . . push button behind drive door on front panel Power indicator . . . . . . . . . . green LED behind drive door on front panel Fan/temperature status indicator . . . . . . . . . . . . . . . . Power-supply status indicator . . . . . . . . . . . . . . . .
Table 1-6. Technical Specifications (continued) Environmental Temperature: Operating . . . . . . . . . . . . 10° to 35°C (50° to 95°F) Storage . . . . . . . . . . . . . –40° to 65°C (–40° to 149°F) Relative humidity . . . . . . . . . . . . . 8% to 80% (noncondensing) Maximum vibration: Operating . . . . . . . . . . . . 0.25 G at 3 to 200 Hz for 15 min Storage . . . . . . . . . . . . . –0.5 G at 3 to 200 Hz for 15 min Maximum shock: Operating . . . . . . . . . . . .
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CHAPTER 2 Basic Troubleshooting This chapter describes basic troubleshooting procedures that can help you diagnose a computer system problem. These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the system. For a brief explanation of how to load and start the system diagnostics, see “Running the Dell Diagnostics” found later in this chapter.
3. Observe the user to determine if he or she is making an error, such as typing an incorrect key combination or entering a command incorrectly. Is the problem a result of user error? Yes. Instruct the user in the proper procedure, or direct him or her to the appropriate user documentation for the correct procedure. No. Proceed to the next section, “External Visual Inspection.
7. Inspect all external monitor controls for any obvious damage or improper settings. For proper settings of the video monitor controls, see the documentation for the monitor. 8. Inspect the keyboard to ensure that no keys are sticking. If one or more keys are sticking, it may be necessary to replace the keyboard. 9. Inspect the exterior of the computer, including all controls and indicators, and all user-accessible data storage devices for any signs of physical damage.
3. Watch the Num Lock, Caps Lock, and Scroll Lock indicators on the upper-right corner of the keyboard. After all three indicators flash momentarily, and following a long pause (approximately 30 seconds), the Num Lock indicator should light up and remain on (unless the Num Lock option is set to Off in the System Setup program). Do these indicators flash on and off within approximately 10 seconds after the boot routine starts? Yes. Proceed to step 4. No. Troubleshoot the system power supplies.
Internal Visual Inspection WARNING: The power supplies in this computer system produce high voltages and energy hazards, which can cause bodily harm. Only trained service technicians are authorized to remove the computer cover and access any of the components inside the computer. CAUTION: Before you proceed with the internal visual inspection described in this section, ensure that the user has saved all open files and exited all open applications if possible.
4. Verify that all jumpers are set correctly. For information about these jumpers, see “System Board Jumpers” in Chapter 1. 5. Check all cable connectors inside the computer to verify that they are firmly attached to their appropriate connectors. 6. Reinstall the computer cover. 7. Reconnect the computer and any attached peripherals to their power sources, and turn them on. Does the problem appear to be resolved? Yes. No further steps are necessary. No.
If no errors are found in RAM, the diagnostics loads and the Diagnostics Menu appears.
CHAPTER 3 Codes and Messages This chapter describes beep codes, system messages, alert messages from the Dell OpenManage HIP application, and SCSI hard-disk drive indicator codes that can occur during POST or during normal system operation. Tables 3-1 and 3-2 list faults that can cause a beep code or system message to occur and the probable causes of the fault in each case. Table 3-3 explains the hard-disk drive indicator patterns.
Table 3-1. System Beep Codes 3-2 Code Cause Corrective Action 1-1-3 NVRAM write/read failure Replace the system board. 1-1-4 BIOS checksum failure This fatal error usually requires that you reflash the BIOS firmware. 1-2-1 Programmable interval-timer failure Replace the system board. 1-2-2 DMA initialization failure 1-2-3 DMA page register write/read failure 1-3-1 Main-memory refresh verification failure Remove and reseat the DIMMs. If the problem persists, replace the system board.
Table 3-1. System Beep Codes (continued) Code Cause Corrective Action 3-1-1 Slave DMA-register failure Replace the system board. 3-1-2 Master DMAregister failure 3-1-3 Master interruptmask register failure 3-1-4 Slave interrupt-mask register failure 3-2-4 Keyboard-controller test failure Check the keyboard cable and connector for proper connection. If the problem persists, run the Keyboard Test Group in the Dell Diagnostics to determine whether the keyboard or keyboard controller is faulty.
Table 3-1. System Beep Codes (continued) Code Cause Corrective Action 4-3-1 Faulty or improperly seated DIMM, DIMMs not installed in sets of four, or a faulty or improperly seated memory module Be sure that the DIMMs are installed in sets of four and in the proper sockets for each memory bank in use. If this does not resolve the problem, remove and reseat the DIMMs or the memory module. If the problem persists, replace the DIMMs or the memory module.
System Messages Table 3-2 lists (in alphabetical order) system messages that can appear on the monitor screen. These messages can help you find the source of a problem. Some of these messages indicate fatal errors. When a fatal error occurs, the system cannot usually be rebooted until an appropriate hardware change has been made. Table 3-2.
Table 3-2. System Messages (continued) Message Cause Corrective Action Diskette drive 0 seek failure Faulty or improperly inserted diskette, incorrect configuration settings in System Setup program, loose diskette/tape drive interface cable, or loose power cable Replace the diskette. Run the System Setup program to correct the diskette drive type. Check the diskette/tape drive interface cable and power cable connections to the drive.
Table 3-2. System Messages (continued) Message Cause Corrective Action Embedded server management error Embedded server management memory may be temporarily corrupted Shut down the system to clear the memory, and then restart the system. Gate A20 failure Faulty keyboard controller (defective system board) Replace the system board. General failure Operating system corrupted or not installed properly Reinstall the operating system.
Table 3-2. System Messages (continued) Message Cause Corrective Action I/O parity interrupt at address Expansion card improperly installed or faulty Reinstall the expansion cards. If the problem persists, replace the expansion card. Keyboard clock line failure Keyboard cable connector loose or improperly connected, defective keyboard, or defective keyboard/ mouse controller (defective system board) Check the keyboard cable connection. Replace the keyboard.
Table 3-2. System Messages (continued) Message Cause Corrective Action Memory address line failure at address, read value expecting value Faulty or improperly seated DIMM, DIMMs not installed in sets of four, a faulty or improperly seated memory module, or a defective system board Be sure that the DIMMs are installed in sets of four and in the proper sockets for each memory bank in use. If this does not resolve the problem, remove and reseat the DIMMs and then the memory module.
Table 3-2. System Messages (continued) Message Cause Corrective Action No boot device available Faulty diskette, diskette/tape drive subsystem, hard-disk drive, hard-disk drive subsystem, or no boot disk in drive A Replace the diskette or hard-disk drive. If the problem persists, replace the system board.
Table 3-2. System Messages (continued) Message Cause Corrective Action Reset failed Improperly connected diskette/tape drive, hard-disk drive, or power cable Check the diskette/tape drive interface cable and power cable connections to the diskette drive. Replace the diskette drive interface cable. Reinstall the harddisk drive. Check the interface cable and power cable connections to the backplane board.
Table 3-2. System Messages (continued) Message Cause Corrective Action Unexpected interrupt in protected mode Faulty or improperly seated DIMM, DIMMs not installed in sets of four, a faulty or improperly seated memory module, or a defective system board Be sure that the DIMMs are installed in sets of four and in the proper sockets for each memory bank in use. If this does not resolve the problem, remove and reseat the DIMMs and then the memory module.
Alert Messages from the Dell OpenManage HIP Application The Dell OpenManage Hardware Instrumentation Package (HIP) server management application generates alert messages that appear in the simple network management protocol (SNMP) trap log file. To see the trap log, select any enterprise under the SNMP trap log icon. Alert log messages consist of information, status, warning, and failure messages for drive, temperature, fan, and power conditions.
Table 3-3. Dell OpenManage HIP Application Alert Log Messages (continued) 3-14 Message Cause Corrective Action Current sensor warning detected The system is consuming more power than the power supplies are rated to output. The power supply name is provided. Verify that all of the expansion cards in the system are functioning properly. Verify that the load requirements of the hardware configured in the system does not exceed the capacity of the power supplies.
Table 3-3. Dell OpenManage HIP Application Alert Log Messages (continued) Message Cause Corrective Action Power supply lost redundancy detected The system has detected that one of the three power supplies has failed and thus lost power supply redundancy. If a second power supply fails, the system will be inoperable. Check the power supply indicators for a power supply failure. Check to make sure the latch switch on each power supply is enabled. Check each connection to the power source.
Table 3-3. Dell OpenManage HIP Application Alert Log Messages (continued) 3-16 Message Cause Corrective Action Temperature sensor detected a failure A temperature probe on the backplane board, system board, or drive carrier in the specified server has exceeded its temperature failure range. If possible, the chassis number and probe number are provided. Check for a fan failure. If needed, replace the fan or fan assembly.
SCSI Hard-Disk Drive Indicator Codes Three indicator lights in each SCSI hard-disk drive carrier provide information on the status of the SCSI hard-disk drives (see Figure 3-1). The SCSI backplane firmware controls the drive online and drive failure indicators. hard-disk drive online indicator hard-disk drive activity indicator hard-disk drive failure indicator Figure 3-1. Hard-Disk Drive Indicators Table 3-4 lists the drive indicator patterns established by the SCSI backplane firmware.
Table 3-4. SCSI Hard-Disk Drive Indicator Patterns 3-18 Condition Indicator Pattern Identify drive All three drive status indicators blink simultaneously. Drive being prepared for removal The three drive status indicators flash sequentially. Drive ready for insertion or removal All three drive status indicators are off. Drive being prepared for operation The drive online indicator is on. The drive activity light may flash briefly. Drive bay empty All three drive status indicators are off.
CHAPTER 4 Removing and Replacing Parts This chapter provides procedures for removing the components, assemblies, and subassemblies in the computer. Unless otherwise noted, each procedure assumes the following: • You have performed the steps in “Precautionary Measures” found later in this chapter. • You have removed the computer cover and/or front bezel as necessary. • You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided.
Precautionary Measures Before you perform any of the procedures in this chapter, take a few moments to read the following warning for your personal safety and to prevent damage to the computer system from ESD. WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the computer, perform the following steps in the sequence listed: 1. Turn off the computer and any attached peripherals. 2.
Computer Cover computer cover keylock Figure 4-1. Computer Cover Removal To remove the computer cover, follow these steps: 1. Turn the keylock on the back edge of the cover clockwise to the unlocked position (see Figure 4-1). 2. Slide the cover a half-inch (about a centimeter) or so toward the back of the computer. 3. Grasping the top of the cover at both ends, lift it away from the chassis. To replace the cover, make sure the keylock is in the unlocked position.
Front Bezel front bezel hooks (3) tabs (4) Figure 4-2. Front Bezel Removal To remove the front bezel, follow these steps: 1. Remove the computer cover. 2. Gently pry the four tabs along the right edge of the bezel loose, and then disengage the three hooks on the opposite edge from the chassis (see Figure 4-2). 3. Rotate the bezel to the left to disengage it.
Control Panel Assembly ribbon cable control panel thumbscrew Figure 4-3. Control-Panel Assembly Removal To remove the control panel assembly, follow these steps: 1. Disconnect the ribbon cable from its connector on the left side of the control panel assembly (see Figure 4-3). 2. Loosen the thumbscrew securing the control panel assembly to the front of the chassis. 3. Slide the control panel assembly to the right (or up if system is in rack-mount position) to disengage the card from the chassis hooks.
Drives Figure 4-4 shows an example of drive hardware that can be installed in the computer. Refer to this figure when you perform any of the procedures in the following subsections. diskette drive SCSI CD-ROM drive diskette-drive interface cable Ultra/Narrow SCSI host adapter connector (SECONDARY SCSI) diskette-drive interface connector (FLOPPY) DC power cable Ultra/Narrow SCSI cable Figure 4-4.
Externally Accessible Drives The chassis provides three bays for 5.25-inch externally accessible drives and a bay dedicated to a 3.5-inch diskette drive. Front-Panel Inserts front-panel inserts Figure 4-5. Front-Panel Inserts To remove the front-panel insert that covers an unused bay (see Figure 4-5), first remove the front bezel.
To remove a close-out panel, pry the bottom of the panel outward at the center until you can unhook a securing tab at one end and work out the other end. When installing close-out panels, install 1.6-inch panels from the bottom up. Make sure the overlap lip is at the bottom and projecting toward you. Insert the tab on one side of the panel into the appropriate slot in the drive cage, bow the panel slightly, and fit the second tab into the slot in the other side of the cage.
5.25- and 3.5-Inch Drives drive-release tabs (2) Figure 4-6. Externally Accessible Drive Removal To remove a 5.25-inch drive assembly from one of the externally accessible drive bays, follow these steps: 1. Press the two drive-release tabs toward the center of the drive, and slide the drive out the front of the bay (see Figure 4-6). 2. Disconnect the DC power cable and the interface cable from the back of the drive.
4. If the drive is a SCSI drive, record the setting of the SCSI address jumpers and SCSI bus termination jumper. 5. If the drive is a SCSI drive, remove the 50-pin-to-68-pin adapter from the SCSI connector on the back of the drive (if present). Some drives use a 50-pin-to-68-pin adapter between the SCSI cable and the drive connector. Check the back of the drive for an adapter, if present; remove it and retain it for use on the new drive. NOTES: When you install a 5.
Hard-Disk Drives in External Bay external drive-bay insert drive in drive carrier flat-head screw release tabs (2) drive-carrier handle drive-carrier locking bar Figure 4-8. Hard-Disk Drives in External Bay Two SCSI hard-disk drives can be installed in the external bay using the harddisk drive carrier insert (see Figure 4-8).
Hard-Disk Drives hard-disk drive keylock drive-carrier handle drive carrier Figure 4-9. Hard-Disk Drive Removal Remove a SCSI hard-disk drive from an internal drive bay as follows: 1. If the system does not have a PowerEdge Expandable RAID Controller installed, shut down the system and go to step 3. CAUTION: Hot-pluggable drive installation and removal is not supported for systems without a Dell PowerEdge Expandable RAID Controller host adapter card.
5. Remove the drive from its carrier by removing the four screws (two on each side) that secure it in the carrier. Before installing a new drive, set all jumpers and remove termination from the drive. When installing the drive, raise the carrier handle until it latches to ensure that the drive is fully seated in the backplane board.
SCSI Backplane Board thumbscrew SCSI backplane board Figure 4-10. Removing a SCSI Backplane Board To remove a SCSI backplane board, follow these steps: 1. Slide the system board tray out to the service position. See “Accessing the Interior of the System” in Chapter 1 for instructions. 2. Remove the hard-disk drives. 3. Disconnect all cables from the SCSI backplane board, noting where cables connected. 4. Loosen the thumbscrew on the backplane board (see Figure 4-10). 5.
CAUTION: Should you remove power from the SCSI backplane board (either by removing the power cable or during replacement of the system board battery), you may need to reflash your system’s firmware. The original firmware on the SCSI backplane is stored in EEPROM. However, if the SCSI backplane firmware is ever updated, the update is stored in volatile RAM. If power is removed from an updated backplane board, the update will be lost and the board will revert to its original firmware in EEPROM.
System Power Supply cutouts (2) legs (2) handle locking bar latch Figure 4-11. Power Supply Removal To remove a power supply, follow these steps: 1. Disconnect the AC power cable from the electrical outlet, and then disconnect the other end of the cable from the power supply. 2. Press the locking bar in the power supply handle to the left (or up if the system is in rack-mount position) until the latch disengages from the chassis (see Figure 4-11). 3.
Power-Supply Paralleling Board screw PSPB Figure 4-12. Power-Supply Paralleling Board Remove the PSPB as follows: 1. Slide the system board tray out to the service position. See “Accessing the Interior of the System” in Chapter 1 for instructions. 2. Disconnect all power harnesses and cables from the PSPB. 3. Loosen the captive screw securing the PSPB to the chassis wall (see Figure 4-12). 4.
System Cooling Fans system board fans (2) hard-disk drive fan assembly Figure 4-13. System Cooling Fans Five cooling fans are installed in the Dell PowerEdge 6300 chassis. The drive fan assembly consists of three fans mounted in a carrier above the hard-disk drive enclosure; the system-board fan assembly consists of two fans mounted in a carrier on the inner wall of the system board tray (see Figure 4-13). The drive fan assembly is hot-pluggable and must be replaced as a unit.
Hard-Disk Drive Fan Assembly fan power-cable bundle connector release tab fan power-cable bundle guide rail Figure 4-14. Hard-Disk Drive Fan Assembly The drive fan assembly is hot-pluggable and can be quickly replaced while the system is running. WARNING: If replacing this assembly while the system is running, make sure you have the new assembly handy, and perform the procedure quickly to avoid overheating the drives. Follow these steps to remove a drive fan assembly: 1.
Fan Power-Cable Bundle NOTE: This is not a hot-pluggable procedure. To remove the power cable bundle that mates to the bottom of the drive fan assembly, follow these steps: 1. Remove the drive fan assembly. 2. Squeeze the ends of the power-cable bundle connector (see Figure 4-14) while pulling the cable from it from under the metal support bracket. 3. Disconnect the other end of the cable from the FAN connector on the SCSI backplane. Drive Fan retention tabs (2) Figure 4-15.
System Board Fans Figure 4-16. System Board Fans The system board fans are hot-pluggable and can be quickly replaced (see Figure 4-16) while the system is running. WARNING: If replacing this assembly while the system is running, make sure you have the new fan assembled and handy, and perform the procedure quickly to avoid overheating the microprocessor(s). 1. Assemble the new fan. Use the push fasteners that came with the new fan to install the finger guard on the fan.
System Board Components The subsections that follow contain procedures for removing system board components. Refer to Figure 4-17 for the location of components.
Expansion Cards keylock in access-door release position latches (2) Figure 4-18. Expansion-Card Access Door NOTE: PCI cards are not hot-pluggable under Microsoft ® Windows ® 95 or Windows NT ® 4.x operating systems. They will become hot-pluggable under Windows NT 5.0, when available. To remove an expansion card, follow these steps: 1. Unlock the keylock, remove the key, and then turn the keylock to the access door release position (see Figure 4-18). 2.
4. For the card you want to remove, press in and hold the clip on the back of the computer. At the same time, from inside the computer, press the curved release lever in the middle of the expansion-card latch toward the bottom of the card. After the release lever clicks into the latch cutout, rotate the latch away from the expansioncard bracket (see Figure 4-19). CAUTION: Do not use a tool to force the latch open.
Interior Support Panel screws (2) support panel Figure 4-20. Interior Support Panel Removal To access the microprocessors or the memory module, you must remove the interior support panel as follows: 1. Loosen the thumbscrews on the left side of the panel (see Figure 4-20). 2. Rotate the panel outward slightly, and lift the hinge side of the panel to clear the tabs from the hinge slot.
DIMMs securing clips Figure 4-21. DIMM Removal To remove a DIMM, follow these steps: 1. Remove the interior support panel. 2. Remove the memory module by grasping it by the corners and pulling it from its connector. 3. Press outward on the socket’s securing clips until the DIMM pops free of the socket (see Figure 4-21). notches 2. securing clips 1. Figure 4-22. DIMM Installation To replace a DIMM, press outward on the securing clips until they snap open (step 1 in Figure 4-22).
SEC Cartridge and Heat Sink Assembly To remove an SEC cartridge and heat sink assembly, follow these steps: WARNING: The SEC cartridge and heat sink assembly can get extremely hot during system operations. Be sure that it has had sufficient time to cool before touching it. WARNING: When handling the SEC cartridge and heat sink assembly, take care to avoid sharp edges on the heat sink. 1.
Terminator Cartridge terminator cartridge release latches (2) guide bracket assembly Figure 4-24. Terminator Cartridge Removal To remove a terminator cartridge, follow these steps: 1. Remove the interior support panel. 2. Press outward on the two SEC cartridge release latches until they snap into the open position (see Figure 4-24). 3. Pull the terminator cartridge straight up out of the connector and guide bracket assembly (some force may be required).
System Battery battery BATTERY socket Figure 4-25. System Battery Removal WARNING There is a danger of the new battery exploding if incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions. To remove the system battery, follow these steps: 1.
System Board Assembly system board tray tray latch Figure 4-26. System-Board Assembly Removal The system board assembly consists of the system board and a mounting plate. The system board is held to the mounting plate with screws and mounting clips. To remove the system board assembly follow these steps: 1. Disconnect all cables from the system board. Be sure to record where each cable is attached. 2.
System Board inner card guide brackets thumbscrew Figure 4-27. System Board Removal To remove the system board from the system board tray, perform the following steps. (If you are replacing the system board, you may want to remove the expansion cards, memory, processors, and processor guides and install them on the replacement system board.) 1. Remove the system board assembly (optional). 2.
Guide Bracket Assembly Figure 4-28. Guide-Bracket Assembly Removal To remove the guide bracket assembly, follow these steps: 1. Remove the system board assembly. 2. Remove the system board from the system board tray. 3. Remove terminator card and SEC cartridge heat sink assemblies if necessary. 4. From the underside of the system board, use a T25 Torx driver to remove the screws at each end of the bracket(s) (see Figure 4-28). 5.
