Dell Precision™ WorkStation 330 Systems Service Manual Before You Begin Computer Cover Interior Service Label Inside Your Computer System Board Components Front Panel (Mini Tower Chassis Only) Front-Panel Inserts Front-Panel Buttons Power Supply System Memory Disk Drives and Media AGP Card Brace (Mini Tower Chassis Only) Expansion Cards Expansion-Card Guide I/O Cooling Fan (Mini Tower Chassis Only) Control Panel Hard-Drive Thermal Sensor Chassis Intrusion Switch Speaker Microprocessor Airflow Shroud Micropr
Back to Contents Page AGP Card Brace (Mini Tower Chassis Only) Dell Precision™ WorkStation 330 Systems Service Manual Removing the AGP Card Brace Replacing the AGP Card Brace Removing the AGP Card Brace To access some components on the system board in the mini tower chassis, you may need to remove the accelerated graphics port (AGP) card brace. CAUTION: Before you perform this procedure, see "Precautionary Measures." 1.
Back to Contents Page System Battery Dell Precision™ WorkStation 330 Systems Service Manual Removing the System Battery Replacing the System Battery Removing the System Battery CAUTION: There is a danger of the new battery exploding if it is installed incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions. CAUTION: Before you perform this procedure, see "Precautionary Measures.
Back to Contents Page Before You Begin Dell Precision™ WorkStation 330 Systems Service Manual Precautionary Measures Recommended Tools Restarting the System Precautionary Measures Before you remove the computer cover, perform the following steps in the sequence indicated. 1. Turn off your computer and any peripherals. 2. Disconnect your computer and peripherals from their power sources. Also, disconnect any telephone or telecommunication lines from the computer.
Back to Contents Page Chassis Intrusion Switch Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the chassis intrusion switch l Replacing the chassis intrusion switch Removing the Chassis Intrusion Switch (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
Mini Tower Chassis l Removing the chassis intrusion switch l Replacing the chassis intrusion switch Removing the Chassis Intrusion Switch (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off. To locate this indicator, see "System Board Components" or "Interior Service Label." 1.
Back to Contents Page Control Panel Dell Precision™ WorkStation 330 Systems Service Manual Components Desktop Chassis Mini Tower Chassis Components The following figure shows the control panel and the location of its principal connectors and components. Control Panel Components Desktop Chassis l Removing the control panel l Replacing the control panel Removing the Control Panel (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
Replacing the Control Panel (Desktop Chassis) NOTE: When mounting the control panel on the chassis, ensure that the control-panel alignment hole is positioned over the guide pin. See "Removing the Control Panel (Desktop Chassis)." To replace the control panel, perform the removal procedure in reverse. Mini Tower Chassis l Removing the control panel l Replacing the control panel Removing the Control Panel (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
Replacing the Control Panel (Mini Tower Chassis) NOTE: When mounting the control panel on the drive door, Ensure that the control-panel alignment hole is positioned over the guide pin. See "Removing the Control Panel (Mini Tower Chassis)." To replace the control panel, perform the removal procedure in reverse.
Back to Contents Page Computer Cover Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the computer cover l Replacing the computer cover Removing the Computer Cover (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." 1. Turn off the computer and peripherals, and disconnect them from their electrical outlets. 2. If installed, remove the padlock from the padlock ring on the back panel. 3.
Replacing the Cover (Desktop Chassis) Mini Tower Chassis l Removing the computer cover l Replacing the computer cover Removing the Computer Cover (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." 1. Turn off the computer and peripherals, and disconnect them from their electrical outlets. 2. If installed, remove the padlock from the padlock ring on the back panel. 3. Remove the computer cover. a.
b. Press the cover release button located at the bottom-left corner of the front panel (see the following figure). c. Rotate the bottom of the cover outward, away from the chassis. Removing the Cover (Mini Tower Chassis) d. Lift the cover away from the chassis. e. Lay the computer down on its right side before you begin working inside the chassis. Replacing the Computer Cover (Mini Tower Chassis) 1. Check all cable connections and fold cables out of the way so that they do not catch on the computer cover.
the cover into the three recessed slots on the computer chassis. b. Rotate the cover downward toward the bottom of the chassis. With both hands, press against the bottom edge of the cover to ensure that the securing hooks at the bottom of the cover click into place. Replacing the Cover (Mini Tower Chassis) c. Slide the two parts of the padlock ring together to lock the cover release mechanism.
Back to Contents Page Disk Drives and Media Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Drive locations l Removing the diskette drive l Replacing the diskette drive l Removing a CD, Zip, or other externally accessible drive l Replacing a CD, Zip, or other externally accessible drive l Removing a hard drive l Replacing a hard drive Drive Locations (Desktop Chassis) Removing the Diskette Drive (Desktop Chassis) CAUTION: Before y
5. Remove the mounting screw. 6. Rotate the left side of the diskette drive upward and lift it free from the drive bracket (see the following figure). Removing the Diskette Drive from the Bracket (Desktop Chassis) Replacing the Diskette Drive (Desktop Chassis) 1. Mount the diskette drive on the bracket: a. Lower the right side of the diskette drive onto the bracket, inserting the drive retention pins into the screw holes on the drive. See "Removing the Diskette Drive from the Bracket (Desktop Chassis)." b.
4. Connect a DC power cable to the power input connector on the back of the drive. 5. Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for the fan and cooling vents. 6. Rotate the power supply back into position until the securing tab snaps into the release latch. 7. Replace the computer cover and restart the system. 8. Run the Dell Diagnostics to verify that the drive is operating properly.
Replacing a CD, Zip, or Other Externally Accessible Drive (Desktop Chassis) 1. Attach the new drive to the drive bracket. Turn the drive upside down, and fit the bracket on the drive so that the screw holes align. To ensure proper installation, all screw holes should be aligned and the tabs on the front of the bracket should be flush with the front of the drive (see "Removing the Drive from the Bracket").
NOTICE: To avoid possible damage, you must match the colored strip on the interface cable with pin 1 on both the drive and system board connectors. a. If you are installing an EIDE device, ensure that the interface cable is properly connected to the EIDE connector on the system board. b. If you are installing a SCSI device, ensure that the SCSI interface cable is properly connected to the interface connector on the SCSI controller board. 4.
1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover. 2. Rotate the power supply away from the system board. 3. Disconnect the DC power and interface cables from the back of the drive. 4. Remove the drive bracket from the chassis. Remove the screw holding the drive bracket in the chassis.
1. Slide the drive into one of bracket bays, oriented so that the connectors on the back of the drive will face the interior of the chassis when the bracket is reinstalled. NOTE: Orient the drive in the bracket so that its bottom will face the left side of the chassis when the bracket is installed in the chassis. 2. Align the screw holes of the drive and bracket, and secure the drive in the bracket using the screws that came with the upgrade kit.
6. Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for the fan and cooling vents. 7. Ensure that the control panel cable is firmly connected to the system board. The control panel contains the hard-drive activity indicator. To locate the control panel system board connector, see "System Board Components" or "Interior Service Label." 8. Rotate the power supply back into position until the securing tab snaps into the release latch. 9.
Removing the Diskette Drive (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off. To locate this indicator, see "System Board Components" or "Interior Service Label." 1.
6. Remove the mounting screw. 7. Rotate the left side of the diskette drive upward and lift it free from the drive bracket (see the following figure). Removing the Diskette Drive from the Bracket (Mini Tower Chassis) Replacing the Diskette Drive (Mini Tower Chassis) 1. Mount the diskette drive on the bracket: a. Lower the right side of the diskette drive onto the bracket, inserting the drive retention pins into the screw holes on the drive.
Removing a Drive Bracket (Mini Tower Chassis) 6. Remove the drive from the bracket. Turn the drive/bracket assembly upside down and remove the four screws that secure the drive to the bracket (see the following figure). Removing the Drive from the Bracket Replacing a CD, Zip, or Other Externally Accessible Drive (Mini Tower Chassis) 1. Attach the new drive to the drive bracket. Turn the drive upside down, and fit the bracket on the drive so that the screw holes align.
2. Slide the new drive/bracket assembly into the drive bay until both drive bracket tabs snap securely into place (see the following figure). Installing the Drive Bracket (Mini Tower Chassis) 3. Connect the interface cable for the drive. See "Attaching Drive Cables (Mini Tower Chassis)." NOTICE: To avoid possible damage, you must match the colored strip on the interface cable with pin 1 on both the drive and system board connectors. a.
5. Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for the fan and cooling vents. 6. If the chassis drive bay was previously empty, remove the corresponding insert from the front panel. Hold the front panel with the outside facing you. Press the ends of the insert with your thumbs until the insert snaps free of the front panel. 7. Replace the front panel. 8. Rotate the power supply back into position until the securing tab snaps into the release latch. 9.
6. Remove the four screws that secure the drive in the bracket (see the following figure). 7. Remove the drive from the bracket Removing a Hard Drive from the Bracket (Mini Tower Chassis) Replacing a Hard Drive (Mini Tower Chassis) 1. Slide the drive into one of bracket bays, oriented so that the connectors on the back of the drive will face the interior of the chassis when the bracket is reinstalled. See "Removing a Hard Drive from the Bracket (Mini Tower Chassis).
NOTE: When you rotate the drive door back into place, ensure that the tabs on the drive door are inserted between the drive bracket and the drive cage. NOTE: Be sure to fold down the drive door handle so that the front panel can be replaced on the chassis. Installing the Hard-Drive Bracket (Mini Tower Chassis) 4. Connect the interface cable for the drive. See "Attaching Hard-Drive Cables (Mini Tower Chassis).
6. Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for the fan and cooling vents. 7. Ensure that the control panel cable is firmly connected to the system board. The control panel contains the hard-drive activity indicator. To locate the control panel system board connector, see "System Board Components" or "Interior Service Label." 8. Replace the front panel. 9. Rotate the power supply back into position until the securing tab snaps into the release latch. 10.
Back to Contents Page Expansion Cards Dell Precision™ WorkStation 330 Systems Service Manual Overview Removing an Expansion Card Overview The computer provides expansion slots for the following cards: l Up to five 32-bit, 33-MHz PCI expansion cards. l One 32-bit AGP card. The expansion slot supports AGP 4x or 2x Pro50 modes operating at 1.5 V. Expansion Card Types Removing an Expansion Card CAUTION: Before you perform this procedure, see "Precautionary Measures.
NOTICE: An AGP Pro50 card may use multiple screws on its bracket. Install all screws on the expansion card's bracket. 7. If you are removing the card permanently, install a filler bracket in the empty card-slot opening, using the screw you removed in step 5. If you need a filler bracket, contact Dell and order part number 81808. See the User's Guide for information on contacting Dell.
Back to Contents Page Expansion-Card Guide Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the expansion-card guide l Replacing the expansion-card guide Removing the Expansion-Card Guide (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
Replacing the Expansion-Card Guide (Desktop Chassis) Insert the two right tabs in the slots in the front chassis wall. Then, rotate the card guide toward the front chassis wall until the two left tabs snap into the slots in the left side chassis wall. See "Removing the Expansion-Card Guide (Desktop Chassis).
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Back to Contents Page Front Panel (Mini Tower Chassis Only) Dell Precision™ WorkStation 330 Systems Service Manual Removing the Front Panel Replacing the Front Panel Removing the Front Panel CAUTION: Before you perform this procedure, see "Precautionary Measures." 1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover. 2.
Back to Contents Page Front-Panel Buttons Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing front-panel buttons l Replacing front-panel buttons Removing Front-Panel Buttons (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." 1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover. 2.
its clip secures it to the cover. l To replace the power button, insert the button into the hole in the front panel of the computer cover so that the button's clips secure it to the cover. l To replace the reset button, insert the button into the hole in the front panel of the computer cover so that the button's clips secure it to the cover. Mini Tower Chassis l Removing front-panel buttons l Replacing front-panel buttons Removing Front-Panel Buttons (Mini Tower Chassis) 1.
l To replace the power button, insert the button into the hole in the front panel of the computer cover so that the button's clips secure it to the cover. l To replace the reset button, insert the button into the hole in the front panel of the computer cover so that the button's clips secure it to the cover.
Back to Contents Page Front-Panel Inserts Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing front-panel inserts l Replacing front-panel inserts Removing Front-Panel Inserts (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." 1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover. 2.
2. Remove the front panel. 3. Hold the front panel with the front facing you. 4. Remove the front-panel insert for the chassis drive bay you want to use. Use your thumbs to press the sides of the insert until it snaps free of the front panel (see the following figure). Removing Front-Panel Inserts (Mini Tower Chassis) Replacing Front-Panel Inserts (Mini Tower Chassis) Position the two ring-tabs over the posts on the inside of the bay opening, and then press the ring tabs over the posts.
Back to Contents Page I/O Cooling Fan (Mini Tower Chassis Only) Dell Precision™ WorkStation 330 Systems Service Manual Removing the I/O Cooling Fan Replacing the I/O Cooling Fan Removing the I/O Cooling Fan CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off.
Back to Contents Page Inside Your Computer Dell Precision™ WorkStation 330 Systems Service Manual Chassis Interior Chassis Interior The following figures show the desktop and mini tower chassis with their covers removed.
NOTE: Before you remove the cover from the mini tower chassis, you must first slide the outer padlock ring to the left to unlock the cover release mechanism. See "Cover Release Mechanism (Mini Tower Chassis).
Back to Contents Page System Memory Dell Precision™ WorkStation 330 Systems Service Manual Removing a Memory Module Replacing a Memory Module Removing a Memory Module CAUTION: Before you perform this procedure, see "Precautionary Measures." CAUTION: RIMMs can get very hot during system operation. Be sure that the RIMMs have had sufficient time to cool before you touch them.
2. Rotate the power supply back into position until the securing tab snaps into the release latch. 3. If you have a mini tower chassis, stand the computer upright. 4. Replace the computer cover and restart the system. The system detects that the new memory does not match the existing system configuration information and generates the following message: The amount of system memory has changed. Strike the F1 key to continue, F2 to run the setup utility 5.
Back to Contents Page Microprocessor Dell Precision™ WorkStation 330 Systems Service Manual Removing the Microprocessor Replacing the Microprocessor Removing the Microprocessor CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off.
3. Remove the microprocessor from its connector. Your microprocessor uses a zero insertion force (ZIF) socket with a lever-type handle that secures or releases the microprocessor. To remove the microprocessor, pull the socket lever straight up until the microprocessor is released. Then remove the microprocessor from the socket (see the following figure). Removing the Microprocessor Replacing the Microprocessor 1. Install the new microprocessor in the socket: a.
2. Install the microprocessor heat sink: NOTICE: If you are you are installing a microprocessor upgrade kit from Dell, remove the film covering the thermal grease on the bottom of the replacement heat sink before installing it. NOTICE: If you are not installing a microprocessor upgrade kit from Dell, reuse the original heat sink and securing clips when replacing the microprocessor.
Back to Contents Page Microprocessor Cooling Fan Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the microprocessor cooling fan l Replacing the microprocessor cooling fan Removing the Microprocessor Cooling Fan (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
l Replacing the microprocessor cooling fan Removing the Microprocessor Cooling Fan (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off. To locate this indicator, see "System Board Components" or "Interior Service Label." 1.
Back to Contents Page Microprocessor Airflow Shroud Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the microprocessor airflow shroud l Replacing the microprocessor airflow shroud Removing the Microprocessor Airflow Shroud (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
Mini Tower Chassis l Removing the microprocessor airflow shroud l Replacing the microprocessor airflow shroud Removing the Microprocessor Airflow Shroud (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off.
Back to Contents Page Power Supply Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Rotating the power supply l Removing the power supply l Replacing the power supply Rotating the Power Supply (Desktop Chassis) To access some of the components on the system board, you may need to rotate the system power supply out of the way. CAUTION: Before you perform this procedure, see "Precautionary Measures." 1.
6. Lift the power supply away from the chassis. Replacing the Power Supply (Desktop Chassis) 1. Insert the chassis pivot pin on the right rear of the power supply into the chassis socket. 2. Rotate the right side of the power supply toward the chassis. The right pivot pin inserts into the chassis slot. See "Removing the Power Supply (Desktop Chassis)." 3. Press the right side of the power supply down until the pivot pin snaps into the chassis slot. 4. Connect the power supply cables to the system board. 5.
Removing the Power Supply (Mini Tower Chassis) 1. Rotate the power supply away from the system board. 2. Disconnect the power supply cables from all drives. 3. Disconnect the power supply cables from the system board. 4. Lift the front of the power supply up to its fully extended position. 5. Rotate the right side of the power supply up and away from the chassis. The pivot pin on the right rear of the power supply rises up and exits the chassis slot. 6.
8. Lift the power supply away from the chassis. Replacing the Power Supply (Mini Tower Chassis) 1. Insert the pivot pin on the left rear of the power supply into the chassis socket. 2. Insert the retention arm pin on the left side of the power supply in the retention arm socket. 3. Rotate the right side of the power supply toward the chassis. The pivot pin on the right rear of the power supply inserts into the chassis slot. See "Removing the Power Supply (Mini Tower Chassis)." 4.
Back to Contents Page Speaker Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the speaker l Replacing the speaker Removing the Speaker (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off.
Replacing the Speaker (Desktop Chassis) NOTE: When mounting the speaker in the retention tabs in the front wall of the chassis, ensure that the speaker cable is oriented toward the top of the chassis. To replace the speaker, perform the removal procedure in reverse. Mini Tower Chassis l Removing the speaker l Replacing the speaker Removing the Speaker (Mini Tower Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
8. From inside the chassis, slide the speaker to the left side of the chassis to remove it from the retention tabs on the front chassis wall (see the following figure). 9. Lift the speaker and cable away from the chassis. Removing the Speaker (Mini Tower Chassis) Replacing the Speaker (Mini Tower Chassis) NOTE: When mounting the speaker in the retention tabs in the front chassis wall, ensure that the speaker cable is oriented toward the right side of the chassis.
Back to Contents Page Interior Service Label Dell Precision™ WorkStation 330 Systems Service Manual Service Label Service Label A service label affixed to the inside of your computer cover indicates the location of system board components and connectors.
Back to Contents Page System Board Dell Precision™ WorkStation 330 Systems Service Manual Removing the System Board Replacing the System Board Removing the System Board CAUTION: Before you perform this procedure, see "Precautionary Measures." NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the system board has turned off. To locate this indicator, see "System Board Components" or "Interior Service Label.
Replacing the System Board 1. Lower the system board into the chassis at an angle, with the I/O panel connectors lowered into the chassis. 2. Carefully push down evenly on both sides of the system board to engage the grounding clips onto their respective chassis tabs. NOTICE: Do not twist the system board as you position it in the chassis. 3. Slide the system board toward the rear of the chassis until it stops. This locks the system board into position. 4. Replace the system board mounting screw. 5.
Back to Contents Page System Board Components Dell Precision™ WorkStation 330 Systems Service Manual Components Labels Jumpers Components The following figure shows the system board and the location of its principal connectors and components. System Board Components Labels The following table lists the labels for connectors and components on the system board, and briefly describes the function of each.
KYBD PS/2 keyboard connector L_IN Line-in connector L_OUT Line-out/speaker connector MIC Microphone connector MICROPROCESSOR Microprocessor with heat sink MSE PS/2 mouse connector NIC NIC connector PANEL Control-panel connector PAR Parallel port connector PCIn PCI expansion-card connector POWER System power connector PSWD Password jumper RIMM_n RIMM socket RTCRST Real-time clock reset jumper SER Serial port connectors SPKR External speaker STANDBY_LED Standby power indicator
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Back to Contents Page Hard-Drive Thermal Sensor Dell Precision™ WorkStation 330 Systems Service Manual Desktop Chassis Mini Tower Chassis Desktop Chassis l Removing the hard-drive thermal sensor l Replacing the hard-drive thermal sensor Removing the Hard-Drive Thermal Sensor (Desktop Chassis) CAUTION: Before you perform this procedure, see "Precautionary Measures.
Replacing the Hard-Drive Thermal Sensor (Desktop Chassis) NOTE: When mounting the hard-drive thermal sensor in the clip in the front wall of the chassis, ensure that the sensor cable is oriented toward the top of the chassis. To replace the hard-drive thermal sensor, perform the removal procedure in reverse.
9. Remove the thermal sensor from the clip in the front wall of the chassis. The hard-drive thermal sensor is mounted on the chassis frame where the hard-drive bracket is installed. 10. Lift the thermal sensor and sensor cable away from the chassis.
Back to Contents Page Dell Precision™ WorkStation 330 Systems Service Manual Notes, Notices, and Cautions Notes, Notices, and Cautions 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 potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Back to Contents Page VRM Dell Precision™ WorkStation 330 Systems Service Manual Overview Removing the VRM Replacing the VRM Overview The voltage regulator module (VRM) senses the microprocessor's voltage requirements and ensures that the correct voltage is maintained. Removing the VRM CAUTION: Before you perform this procedure, see "Precautionary Measures.
a. Lower the clip onto the VRM so that the top corners of the VRM go through the slots in the clip. b. Press down on the two raised points of the clip's top surface to secure it to the VRM connector (see "Removing the VRM"). 4. Rotate the power supply back into position until the securing tab snaps into the release latch. 5. Replace the computer cover and restart the system.
