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Dell OptiPlex 270, Service Manual

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Dell OptiPlex 270 Service Manual Download Page 18

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System Board 

Dell™ OptiPlex™ GX270 Service Manual

 

 

 

Small Form-Factor System Board  

 

 

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

  

 

 

 

Small Desktop System Board  

 

 

1 

 

floppy-drive connector (DSKT) 

11 

 

CD drive audio cable connector (CD_IN) 

2 

 

CD/DVD drive connector (IDE2) 

12 

 

front-panel audio cable connector 

(FRONTAUDIO) 

3 

 

battery socket (BATTERY) 

13 

 

power connector (12VPOWER) 

4 

 

front-panel connector 

(FRONTPANEL) 

14 

 

serial port connector (SER2) for optional 

serial port cards 

5 

 

IDE hard-drive connector (IDE1) 

15 

 

microprocessor and heat sink connector 

(CPU) 

6 

 

serial ATA hard-drive connector 

(SATA1) 

16 

 

microprocessor fan connector (FAN) 

7 

 

internal speaker (SPEAKER) 

17 

 

memory module connectors (DIMM_1 and 

DIMM_2) 

8 

 

standby power light (AUX_PWR) 

18 

 

power connector (POWER) 

9 

 

AGP card connector (AGP) 

19 

 

RTC reset jumper (RTCRST) 

10 

 

PCI card connector 

20 

 

password jumper (PSWD) 

Summary of Contents for OptiPlex 270

Page 1: ...l Inc is strictly forbidden Trademarks used in this text Dell the DELL logo and OptiPlex are trademarks of Dell Inc 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 June 2004 Rev A01 NOTE A NOTE indicates important ...

Page 2: ...as you remove it from the chassis Chassis hooks may hold the cable in place inside the chassis 2 Slide the chassis intrusion switch out of its slot and remove the switch and its attached cable from the computer Small Form Factor Computer Small Desktop Computer CAUTION Before you begin any of the procedures in this section follow the steps in Safety Instructions NOTICE Before you disconnect a devic...

Page 3: ...l outlets and turn them on Resetting the Chassis Intrusion Detector 1 Enter system setup by pressing F2 during the computer s start up 2 Under the System Security tab reset the Chassis Intrusion option by pressing the left or right arrow key to select Reset Change the setting to Enabled Enabled Silent or Disabled NOTICE To connect a network cable first plug the cable into the network wall jack and...

Page 4: ...r and implement your changes Back to Contents Page NOTE The default is Enabled Silent NOTE If a setup password has been assigned by someone else contact the network administrator for information on resetting the chassis intrusion detector ...

Page 5: ...de of the computer and remove the computer cover from the computer CAUTION Before you begin any of the procedures in this section follow the steps in Safety Instructions NOTICE Before you disconnect a device from the computer or remove a component from the system board verify that the standby power light on the system board has turned off To locate the light see System Board NOTICE To disconnect a...

Page 6: ...the front I O panel see I O Panel 2 Using an 8 inch 2 Phillips screwdriver remove the screw that secures the control panel to the computer and lift the panel away from the computer Small Mini Tower Computer 1 To remove the top and bottom panels of the computer remove any installed CD drives and release all the tabs on each panel 1 metal control panel shield 2 screw ...

Page 7: ...at secures the control panel to the computer and pull the control panel away from the computer Replacing the Control Panel Small Form Factor Computer 1 Replace the control panel and the control panel shield 1 computer cover tab remove the CD drive to access this tab 4 bottom panel 2 top panel tabs 5 computer cover screw 3 top panel 6 computer cover tabs 2 NOTE To release the tab located by the CD ...

Page 8: ... front mask by releasing the tabs on the inside of the computer cover b Remove the accent door by pressing the middle of the door while you lift away the sides of the door 3 Replace the computer cover and ensure that the two metal hooks and tabs are securely in position 4 To replace the front mask and accent door press them into position Small Desktop Computer 1 accent door 2 front mask 1 metal ho...

Page 9: ...ntrol Panel procedure in the reverse order ensuring that all tabs are secure Small Mini Tower Computer Follow the steps in the Removing the Control Panel procedure in the reverse order ensuring that all tabs are secure Back to Contents Page ...

Page 10: ...e two release buttons shown in the illustration Then press the two release buttons as you lift the cover 2 Raise the back of the cover and pivot it toward the front of the computer Small Form Factor Computer Small Desktop Computer CAUTION Before you begin any of the procedures in this section follow the steps in Safety Instructions NOTICE To disconnect a network cable first unplug the cable from y...

Page 11: ... on the top of the cover with the other hand b Press the release button on the left side of the computer with one hand while pulling up on the top of the cover with the other hand c Hold the bottom of the computer with one hand and then pull open the cover with the other hand Back to Contents Page 1 security cable slot 2 padlock ring 3 release buttons one on each side 1 release buttons 2 2 securit...

Page 12: ...devices to electrical outlets and turn them on After you open and close the cover the chassis intrusion detector if enabled causes the following message to appear on the screen at the next computer start up ALERT Cover was previously removed 5 Reset the chassis intrusion detector by entering system setup and changing the Chassis Intrusion setting to Enabled or Enabled Silent Back to Contents Page ...

Page 13: ...g of the control panel cable as you remove it from the computer so that you can replace it correctly 4 From inside the computer cover remove the mounting screw that secures the I O panel to the computer 5 Remove the I O panel from the computer Small Form Factor Computer CAUTION Before you begin any of the procedures in this section follow the steps in Safety Instructions NOTICE Before you disconne...

Page 14: ...Contents Page 2 chassis intrusion switch cable 5 front audio cable 3 control panel cable 6 I O cable 1 chassis intrusion switch cable 4 control panel cable 2 internal speaker cable 5 front audio cable 3 I O cable 6 mounting screw 1 control panel cable 4 mounting screw 2 front audio cable 5 internal speaker cable 3 I O cable 6 chassis intrusion switch cable ...

Page 15: ...ove them from the system board and drives You must route these cables properly when you replace them to prevent their being pinched or crimped 2 Press the release button located on the floor of the computer frame CAUTION Before you begin any of the procedures in this section follow the steps in Safety Instructions NOTICE Before you disconnect a device from the computer or remove a component from t...

Page 16: ... clips while you pull on the metal clips with your fingers 3 Press down on the handle which in turn presses the release button 4 Slide the power supply toward the front of the computer approximately 1 inch 5 Lift the power supply up and out of the computer Small Mini Tower Computer 1 Disconnect the DC power cables from the system board and the drives Note the routing of the DC power cables underne...

Page 17: ...les 4 Connect the AC power cable to the connector 5 On the small desktop computer reattach the power cables to the side of the hard drive and replace the expansion card cage 6 Run the cables underneath the clips and press the clips to close them over the cables 7 Close the computer cover 8 Attach the computer stand if it is used 9 Connect your computer and devices to electrical outlets and turn th...

Page 18: ...13 power connector 12VPOWER 4 front panel connector FRONTPANEL 14 serial port connector SER2 for optional serial port cards 5 IDE hard drive connector IDE1 15 microprocessor and heat sink connector CPU 6 serial ATA hard drive connector SATA1 16 microprocessor fan connector FAN 7 internal speaker SPEAKER 17 memory module connectors DIMM_1 and DIMM_2 8 standby power light AUX_PWR 18 power connector ...

Page 19: ...NTPANEL 14 serial port connector SER2 for optional serial port cards 5 IDE hard drive connector IDE1 15 microprocessor and heat sink connector CPU 6 serial ATA hard drive connector SATA1 16 microprocessor fan connector FAN 7 internal speaker SPEAKER 17 memory module connectors DIMMs 1 3 2 and 4 8 standby power light AUX_PWR 18 power connector POWER 9 AGP card connector AGP 19 RTC reset jumper RTCR...

Page 20: ... CPU 6 serial ATA hard drive connector SATA2 17 microprocessor fan connector FAN 7 serial ATA hard drive connector SATA1 18 memory module connectors DIMMs 1 3 2 and 4 8 internal speaker SPEAKER 19 power connector POWER 9 standby power light AUX_PWR 20 RTC reset jumper RTCRST 10 AGP card connector AGP 21 password jumper PSWD 11 PCI connectors PCI 1 2 3 and 4 Jumper Setting Description PSWD default ...

Page 21: ...tem board 8 Disconnect all cables from the system board 9 Before you remove the existing system board assembly visually compare the replacement system board to the existing system board to make sure that you have the correct part NOTICE To disconnect a network cable first unplug the cable from your computer and then unplug it from the network wall jack CAUTION To guard against electrical shock alw...

Page 22: ...e the heat sink assembly and microprocessor from the existing system board and transfer them to the replacement system board 3 Configure the settings of the replacement system board 4 Set the jumpers on the replacement system board so they are identical to the ones on the existing board 5 Orient the replacement board by aligning the notches on the bottom to the tabs on the computer 6 Replace the s...

Page 23: ...Back to Contents Page ...

Page 24: ... possible damage to the system board wait 5 seconds after turning off the computer before disconnecting a device from the computer l To avoid shorting out your computer when disconnecting a network cable first unplug the cable from the network adapter on the back of your computer and then from the network jack When reconnecting a network cable to your computer first plug the cable into the network...

Page 25: ...ch any of your computer s electronic components such as the microprocessor You can do so by touching an unpainted metal surface on the computer chassis As you continue to work inside the computer periodically touch an unpainted metal surface to remove any static charge your body may have accumulated You can also take the following steps to prevent damage from electrostatic discharge ESD l Do not r...

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