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1 PC Card reader 2 M2 x 3-mm screws (4) 3 connector pull-tab Back to Contents Page Pin Assignments for I/O Connectors Dell Precision™ M70 Service Manual USB Connector Video Connector S-Video TV-Out Connector Serial Connector USB Connector Video Connector S-Video TV-Out Connector Pin Signal 1 USB5V+ 2 USBP– 3 USBP+ 4 GND Pin Signal Pin Signal 1 CRT_R 9 5V+ 2 CRT_G 10 GND 3 CRT_B 11 MONITOR_DETECT– 4 NC 12 DDC_DATA 5 GND 13 CRT_HS 6 GND 14 CRT_VS 7 GND 15 DDC_CLK 8 GND Serial Connector Back to Contents Page S-Video Pin Signal 1 GND 2 GND 3 DLUMA-L 4 DCRMA-L Composite Video Pin Signal 5 SP_DIF 6 DCMPS-L 7 SP_DIF Pin Signal Pin Signal 1 DCD 6 DSR 2 RXDA 7 RTS 3 TXDA 8 CTS 4 DTR 9 RI 5 GND Back to Contents Page Smart Card Reader Dell Precision™ M70 Service Manual Removing the Smart Card Reader 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the display assembly. 3. Remove the keyboard. 4. Remove the palm rest. 5. Locate the smart card reader and disconnect the smart-card ZIF connector from the system board. 6. Remove the single M2 x 3-mm screw in the neck of the smart card reader. 7. Lift the smart card reader slightly and slide it out from under the tabs holding it in place. Back to Contents Page CAUTION: Before performing the following procedures, read the safety instructions in your Product Information Guide. NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer. 1 smart card reader 2 M2 x 3-mm screw 3 smart-card ZIF connector Back to Contents Page Speakers Dell Precision™ M70 Service Manual 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the coin-cell battery. 3. Remove the display assembly. 4. Remove the keyboard. 5. Remove the palm rest. 6. Remove the M2.5 x 5-mm screw from the speakers. 7. Disconnect the speaker cable from the system board. Back to Contents Page CAUTION: Before performing the following procedures, read the safety instructions in your Product Information Guide. NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer. NOTICE: Handle the speakers with care to avoid damaging them. 1 speakers 2 M2.5 x 5-mm screw 3 speaker cable connector 4 computer base Back to Contents Page System Board Dell Precision™ M70 Service Manual Removing the System Board The system board's BIOS chip contains the Service Tag, which is also visible on a barcode label on the bottom of the computer. The replacement kit for the system board includes a CD that provides a utility for transferring the Service Tag to the replacement system board. 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove any installed modules. 3. Remove the mini PCI card. 4. Remove the modem. 5. Remove the display assembly. 6. Remove the keyboard. 7. Remove the palm rest. 8. Remove the video-card thermal cooling assembly. 9. Remove the microprocessor thermal-cooling assembly. 10. Remove the video card fan. 11. Remove the microprocessor fan. 12. Remove the memory. 13. Remove the microprocessor. 14. Remove the hard drive. 15. Remove the smart card reader. 16. Remove the PC Card carrier. 17. Remove the speakers. 18. Remove the two M2.5 x 5-mm screws from the button board. CAUTION: Before performing the following procedures, read the safety instructions in your Product Information Guide. NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer. NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. 19. Remove the M2 x 3-mm screw from the system board support. 20. Remove the three M2.5 x 5-mm screws that secure the system board to the computer base. 21. Remove the system board from the computer base. a. Ensure that you have disconnected all cables from the system board. b. Gently lift the board starting from the left side, and then pull to the left to dislodge the audio connectors from the holes in the base. 1 M2 x 3-mm screw 2 system board support 1 M2.5 x 5-mm screws (3) c. After the connectors are dislodged, lift the board out of the base. Installing the System Board 1. Perform all the steps in "Removing the System Board" in reverse order. 2. Turn on the computer. 3. Insert the floppy or CD that accompanied the replacement system board into the appropriate drive. Follow the instructions that appear on the screen. Back to Contents Page NOTE: You may need to press outward on the base near the audio connectors to provide enough clearance for the audio connectors. NOTICE: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in da...