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5. Disconnect the button board cable from the system board. 6. Disconnect the speaker cable from the system board. 7. Remove the display assembly (see Removing the Display Assembly). 8. Remove the nine screws from the bottom of the computer. 9. Turn the computer over and remove the two screws securing the top of the palm rest. 10. Disconnect the touch pad connector and the device status lights LED connector from the system board. CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide. NOTE: It is not necessary to remove the Bluetooth cable connector from the system board connector. NOTE: The screw locations may vary slightly from the image shown below. NOTICE: Do not use force to separate the palm rest from the computer. If you encounter resistance, gently flex or apply pressure to the palm rest, or move along the edge, working away from the area of resistance, until the palm rest is free. 11. Moving from left to right, carefully lift the palm rest along the rear edge, near the hinge brackets, then gently lift the palm rest to remove it from the computer. Replacing the Palm Rest 1. Align the palm rest with the base of the computer and gently snap it into place. 2. Connect the touch pad connector and the device status lights LED connector to the system board. 3. Replace the two screws on the top of the palm rest. 4. Turn the computer over and replace the nine screws on the bottom of the computer to secure the palm rest. Back to Contents Page 1 screws (2) 2 palm rest 3 touch pad connector 4 device status lights LED connector 5 display hinge screw CAUTION: Before you begin the following procedure, follow the safety instructions in the Product Information Guide. Back to Contents Page ExpressCards Dell™ Inspiron™ 1525/1526 Service Manual Removing an ExpressCard or Blank Press the card or blank to remove it from its slot. Save a blank to use when no ExpressCard is installed in a slot. Blanks protect unused slots from dust and other particles. Installing an ExpressCard or Blank You can install an ExpressCard while the computer is running. The computer automatically detects the card. ExpressCards are generally marked with a symbol (such as a triangle or an arrow) or a label to indicate which end to insert into the slot. The cards are keyed to prevent incorrect insertion. If card orientation is not clear, see the documentation that came with the card. To install an ExpressCard: 1. Hold the card with the top side of the card facing up. 2. Slide the card into the slot until the card is completely seated in its connector. If you encounter too much resistance, do not force the card. Check the card orientation and try again. The computer recognizes the ExpressCard and automatically loads the appropriate device driver. If the configuration program tells you to load the manufacturer's drivers, use the media that came with the ExpressCard. Back to Contents Page CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. Back to Contents Page Pin Assignments for I/O Connectors Dell™ Inspiron™ 1525/1526 Service Manual USB Connector Video Connector S-Video TV-Out Connector 1394 Connector HDMI 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 1394 Connector HDMI Connector S-Video Pin Signal 1 GND 2 GND 3 DLUMA-L 4 DCRMA-L Pin Signal 1 TPB- 2 TPB+ 3 TPA- 4 TPA+ Pin Signal Pin Signal 1 TMDS Data 2+ 11 TMDS Clock Shield 2 TMDS Data 2 Shield 12 TMDS Clock- 3 TMDS Data 2- 13 CEC 4 TMDS Data 1+ 14 No Connect 5 TMDS Data 1 Shield 15 DDC Clock 6 TMDS Data 1- 16 DDC Data 7 TMDS Data 0+ 17 Ground 8 TMDS Data 0 Shield 18 +5V Power Back to Contents Page 9 TMDS Data 0- 19 Hot Plug Detect 10 TMDS Clock+ 20 SHELL Back to Contents Page Subscriber Identity Module (Optional) Dell™ Inspiron™ 1525/1526 Service Manual Subscriber Identity Modules (SIM) identify users uniquely through an International Mobile Subscriber Identity. Replacing the SIM 1. Follow the procedures in Before You Begin. 2. In the battery bay, slide the SIM into the compartment with the cut-off corner of the card facing away from the compartment. Removing the SIM Press the SIM into the slot to release it. When it is partially ejected, remove the SIM from the battery bay. Back to Contents Page CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. NOTE: Only GSM (HSDPA) type cards need a SIM. EVDO cards do not use a SIM. 1 SIM 2 battery bay Back to Contents Page Speaker Assembly Dell™ Inspiron™ 1525/1526 Service Manual Removing the Speaker Assembly ...