Components of a computer: – microprocessor, memory, video slot/card, sound card, I/O card, FDD and CD controllers, serial and parallel interfaces, expansion modules.
Microprocessor: – Specifications, speed, data and address bus widths
Memory: – RAM, ROM, cache, floppy and hard disk, CD and DVD ROM, USB. Maintenance, testing and cleaning drives.
I/O: – Serial and parallel, RS232, RS423, Centronics, serial and parallel cables and connector testing for use in current PC systems
Monitors and Displays: – Definitions, types, uses and applications.
Printers: – types, applications and specifications. Principles of operation of inkjet and laser printers, paper handling, printer cables and connections.
Power supplies. Ratings: – Voltage, current and power requirements, DC and AC. The energy saving function, block diagram, typical faults, software setup and menu-driven adjustments.
Electro-Static Discharge (ESD) and Safety Precautions.
Installing and commissioning functioning systems.
Fault Diagnosis: – PC boot-up sequence, Power On Self Test (POST), virus checking and clearing, Software diagnostics and flowcharts. Component and module substitution and testing techniques.