4  Replacement Procedures 
Satellite A50S/TECRA A3X  Maintenance Manual (960-534)                 [CONFIDENTIAL]  4-iii 
Chapter 4  Contents 
4.1 Overview....................................................................................................................4-1 
Safety Precautions ................................................................................................4-2 
Before You Begin ................................................................................................ 4-3 
Disassembly Procedures ...................................................................................... 4-4 
Assembly Procedures........................................................................................... 4-5 
Tools and Equipment........................................................................................... 4-5 
Screw Tightening Torque .................................................................................... 4-6 
Grip Color............................................................................................................4-6 
Screw Notation.....................................................................................................4-7 
4.2  Battery Pack/PC Card................................................................................................ 4-8 
4.2.1  Battery Pack............................................................................................... 4-8 
4.2.2  PC Card....................................................................................................4-10 
4.3 Memory Module ...................................................................................................... 4-11 
4.4 MDC ........................................................................................................................ 4-14 
4.5 HDD......................................................................................................................... 4-16 
4.6  Wireless LAN Card..................................................................................................4-19 
4.7 Cooling Fin/CPU ..................................................................................................... 4-21 
4.8 Keyboard.................................................................................................................. 4-26 
4.9  Switch Membrane Board .........................................................................................4-30 
4.10 Optical Drive............................................................................................................ 4-32 
4.11 Display Assembly....................................................................................................4-34 
4.12 Sound Board.............................................................................................................4-38 
4.13  Parallel port board/Serial port board/S-Video board ............................................... 4-39 
4.14 FAN..........................................................................................................................4-46 
4.15  System Board/DC-IN Jack/RTC Battery................................................................. 4-47 
4.16  PC card cover........................................................................................................... 4-50 
4.17 Battery Latch............................................................................................................ 4-51 
4.18 Battery Lock.............................................................................................................4-53 
4.19 Touch Pad ............................................................................................................... 4-55 
4.20  LCD Unit/FL Inverter..............................................................................................4-57