Acer Aspire 7420 Service Guide
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Chapter 393 23.Remove the four screws (C) holding the left and right speakers. 24.Remove the left and right speakers from the upper case. Removing the USB Board 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the SD dummy card” on page 63. 3.See “Removing the PC and ExpressCard dummy cards” on page 63. 4.See “Removing the Lower Cover” on page 64. 5.See “Removing the Secondary HDD Cover” on page 65. 6.See “Removing the Secondary HDD Bracket and Connector” on page 66. 7.See “Removing the DIMM” on page 68. 8.See “Removing the WLAN Board Modules” on page 68. 9.See “Removing the Hard Disk Drive Module” on page 69. 10.See “Removing the Optical Drive Module” on page 70. 11 .See “Removing the Modem Board” on page 73. 12.See “Removing the Heatsink Fan Module” on page 74. 13.See “Removing the CPU and VGA Heatsink Module” on page 75. 14.See “Removing the CPU” on page 76. 15.See “Removing the VGA board (for Discrete model only)” on page 77. 16.See “Removing the Middle Cover and the Power Board” on page 78. 17.See “Removing the Keyboard” on page 79. 18.See “Removing the LCD Module” on page 81. 19.See “Separating the Upper Case from the Lower Case” on page 83. 20.See “Removing the Main Board” on page 89. StepSize (Quantity)ColorTo r q u e 1~4 M2 x L4 (4) Silver 1.6 kgf-cm
94Chapter 3 21.Remove the one screw (C) securing the USB board to the lower case. 22.Remove the USB Board from the lower case. StepSize (Quantity)ColorTo r q u e 1 M2 x L4 (1) Silver 1.6 kgf-cm
Chapter 395 LCD Module Disassembly Process LCD Module Disassembly Flowchart Main Screw List ItemScrewPart No. A M2.5 x L6 86.00E33.736 E M2.5 x L5 86.00F19.735 F M2 x L3 86.00C07.220 LCD MODULE LCD BEZEL LEFT HINGERIGHT HINGE Ax 8 Ex1 Ex 1 LCD ASSEMBLY LEFT LCD BRACKETFx2RIGHT LCD BRACKETFx2LCD FPC CABLE INVERTER BOARD LCD BACK PANEL ANTENNAS LCD MODULE DISASSEMBLY Ax2 Ax1 VGA CAMERAINTERNAL MICROPHONE
96Chapter 3 Removing the LCD Bezel 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.Remove the four upper bezel screw caps and the four lower bezel caps. 7.Remove the eight screws (A) on the LCD module in the order as shown. StepSize (Quantity)ColorTo r q u e 1~8 M2.5 x L6 (8) Black 3.0 kgf-cm
Chapter 397 8. Carefully pry open the LCD bezel and remove the bezel from the LCD module. NOTE: The bottom side of the bezel is glued to the lcd panel, be careful when trying to remove the bezel. Removing the LCD module with the Brackets 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.See “Removing the LCD Bezel” on page 96. 7.Disconnect the cable from the camera board.
98Chapter 3 8.Remove the three screws (A) securing the LCD module and the Inverter panel. 9.Detach the LCD with the brackets from the back cover. Removing the Inverter Board and FPC Cable 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.See “Removing the LCD Bezel” on page 96. 7.See “Removing the LCD module with the Brackets” on page 97. 8.Disconnect the inverter board cable from its connector, then disconnect the 2P cable on the inverter board to remove it. StepSize (Quantity)ColorTo r q u e 1~3 M2.5 x L6 (3) Black 3.0 kgf-cm
Chapter 399 9.Detach the acetic tapes holding the FPC cable from the LCD panel and detach the acetic tape securing the FPC connector. 10.Disconnect the FPC cable from the LCD panel. Removing the LCD Brackets 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.See “Removing the LCD Bezel” on page 96. 7.See “Removing the LCD module with the Brackets” on page 97. 8.See “Removing the Inverter Board and FPC Cable” on page 98. 9.Remove the four screws (F) securing the left and right LCD brackets to remove the brackets. StepSize (Quantity)ColorTo r q u e 1~4 M2 x L3 (4) Silver 1.6 kgf-cm
100Chapter 3 Removing the Left and Right Hinge 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.See “Removing the LCD Bezel” on page 96. 7.See “Removing the LCD module with the Brackets” on page 97. 8.Remove the two screws (E) securing the left and right hinge to the back cover. 9.Remove the left and right hinge from the back cover. Removing the Antennas 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.See “Removing the LCD Bezel” on page 96. 7.See “Removing the LCD module with the Brackets” on page 97. 8.See “Removing the Left and Right Hinge” on page 100. StepSize (Quantity)ColorTo r q u e 1~2 M2.5 x L5 (2) Black 2.5 kgf-cm
Chapter 3101 9.Loosen the aluminum tape holding the antennas in place. 10.Release the antenna cables from the latches. 11 .Remove the tapes together with the antenna cables from the back cover. Removing the Internal Microphone and Web Camera 1.See “Removing the Battery Pack” on page 62. 2.See “Removing the Lower Cover” on page 64. 3.See “Removing the WLAN Board Modules” on page 68. 4.See “Removing the Middle Cover and the Power Board” on page 78. 5.See “Removing the LCD Module” on page 81. 6.See “Removing the LCD Bezel” on page 96.
102Chapter 3 7.See “Removing the LCD module with the Brackets” on page 97. 8.See “Removing the Left and Right Hinge” on page 100. 9.See “Removing the Antennas” on page 100. 10.Remove the tape holding the internal microphone in place. 11 .Remove the internal microphone from the back cover. 12.Remove the Web camera from the back cover.