HP LTE Notebook PC 5250 LTE 5000 Family of Personal Computers Maintenance and - Page 16

10 Docking sensor Access to a microswitch that initiates the docking scenario when the computer is being docked. Also serves as a guide for the MPEG Adapter. 11 Mono microphone jack Connects a powered electric condenser microphone. 12 Volume control Controls volume to the built-in speakers or to external speakers or headphones connected to the computer or MultiBay Expansion Base. 13 MultiBay device release Releases a drive or battery pack from the MultiBay. 14 Ventilation exhaust Exhaust vent for proper airflow to help prevent the computer from overheating. 15 Infrared port Transfers data to another computer or external device that accepts IrDA format. 16 Security slot Provision for an optional security cable lock to be attached to the computer. Chapter 1.4 Design Overview - Computer This section presents a design overview of the computer. The discussion is limited to the field replaceable parts. All replaceable parts are identified in Chapter 3, and removal/replacement procedures are presented in Chapter 5. The computer is a traditional clamshell design with a display unit and system unit. The computer opens to reveal a backlighted LCD display and keyboard. The display is designed for a continuously adjustable tilt angle. The system unit houses the system board, processor board, power board, keyboard, I/O ports, operator controls and indicators, mass storage device bays, and battery bay. The main components of the system unit include the following: o Processor (Intel Mobile Pentium 75 MHz, 90MHz, 100MHz, 120MHz, 133mhz, or 150 MHz) o System controller (OPTi 556/557/558N, OPTi 602A) o VGA controller (Cirrus CL-GD754x) o Keyboard controller (Intel 80C51SL) o PCMCIA controller (Cirrus 6722)