AFL-HM55 Series Panel PCPage V3.9.3 Clear CMOS Jumper........................................................................................ 273.9.4 COM1 Pin 9 Setting ......................................................................................... 293.9.5 COM3 TX Function Select Jumper .................................................................. 313.9.6 COM3 RS-232/422/485 Jumper....................................................................... 323.9.6.1 COM3 RS-422 and RS-485 Pinouts ......................................................... 333.9.7 COM3 RS Function Select Jumper .................................................................. 343.9.8 ME Debug Mode Jumper ................................................................................. 353.9.9 iTPM Setting Jumper ....................................................................................... 363.9.10 ME RTC Select Jumper.................................................................................. 373.9.11 SPI Setting Jumper ......................................................................................... 383.10 M OUNTING THE SYSTEM ........................................................................................ 393.10.1 Wall Mounting................................................................................................ 393.10.2 Panel Mounting.............................................................................................. 423.10.3 Arm Mounting ................................................................................................ 453.10.4 Cabinet and Rack Installation (15-inch and 17-inch models only) ............... 463.11 BOTTOM PANEL CONNECTORS ................................................................................ 473.11.1 LAN Connection ............................................................................................. 473.11.2 Serial Device Connection............................................................................... 483.11.3 USB Device Connection ................................................................................. 493.11.4 VGA Monitor Connection............................................................................... 503.12 AT/ATX M ODE SELECTION .................................................................................... 513.12.1 AT Power Mode.............................................................................................. 513.12.2 ATX Power Mode ........................................................................................... 514 SYSTEM MAINTENANCE ....................................................................................... 534.1 SYSTEM M AINTENANCE I NTRODUCTION .................................................................. 544.2 ANTI - STATIC PRECAUTIONS ...................................................................................... 544.3 TURN OFF THE POWER .............................................................................................. 554.4 REPLACING COMPONENTS ........................................................................................ 554.4.1 Memory Module Replacement ......................................................................... 554.4.2 SATA DOM Card Replacement ........................................................................ 584.4.3 HDD Card Replacement .................................................................................. 585 BIOS SETUP ................................................................................................................ 595.1 I NTRODUCTION ......................................................................................................... 60