Compaq 4120T, 4130T, 4150T, 4140T, 4131T, 4200 Design Overview - Computer, System Unit, System Board

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1.8Design Overview - Computer

This section presents a design overview of the 4100 and 4200 Families. The overview is limited to field replaceable parts. All replacement parts are listed in Chapter 3. Removal and replacement procedures are presented in Chapter 5.

The computer is a traditional clamshell design with a display unit attached to a system unit. The computer opens to reveal a backlighted LCD display and a full-sized keyboard. The display is designed for a continuously adjustable tilt angle. The system unit houses the keyboard, I/O ports, operator controls and indicators, and DualBay devices.

1.8.1System Unit

The system unit contains the following field-replaceable parts:

■System board

■Processor board

■Display assembly

■CPU/keyboard cover

■Internal microphone

■Optional memory expansion boards

■Lithium Real Time clock battery

■Hard drive

■Diskette drive

■Handle

■Pointing device

■CPU base cover

■PCMCIA assembly

1.8.2System Board

The Compaq Armada system electronics are integrated on two printed circuit assemblies; the system board and the processor board. The 4100 system boards are not compatible with the 4200 Family system boards. Similarly, the 4200 system boards are not compatible with the 4100 Family.

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