Sarita,Vikki,SRCC,DU E-RESOURCE 45 Entify and Understand Front Panel Switches and Back Panel Connections of Computer Front Panel details of Tower model computer Sarita,Vikki,SRCC,DU E-RESOURCE 46 1. Power on Switch. 2. Power on (LED) indicator. 3. Reset Switch. 4. Hard Di sk Activity indicator. 5. CD-Open / Close / Stop button. 6. CD-Drive Activity indicator. 7. Play / Skip button. 8. Previous Track button. S arita, Vikki, SRC C ,DU 9. Turbo button. 10. Head Phone Volume controller. 11. Head Phone Jack. 12. Floppy Disk Eject button. 13. Floppy Disk Insertion slot. 14. Floppy Disk Activity button. 15. CD-R/W Speed. 16. Emergency Eject hole. E-RESOURCE 47 Sarita,Vikki,SRCC,DU PC Back Panel details

E-RESOURCE 48 1. AC-Power in (From Main or UPS) 2. AC-Power out (To Monitor) 3. Exhaust Fan. 4. Keyboard Port(For AT2 Keyboard connector) 5. Keyboard port (For PS2 Keyboard connector) 6. Mouse Port(For PS2 Mouse connector) 7. USB Port (2 No"s for Inkj et Printer) 8. Fire wall port S arita, Vikki, SRC C ,DU 9. Serial Port (COM1 and COM2 for Mouse / Modem Connector) 10. Parallel Port (LPT1 for printer connection) 11. Video Port (For Monitor) 12. Multimedia Ports. (For mic, speaker, line-in connection) 13. Network Ports (RCAJACK / BNC for network cable connection) 14. SCSI ports (For connecting external SCSI hard disk) E-RESOURCE 49 Sarita,Vikki,SRCC,DU E-RESOURCE 50 PRACTICE CONNECTING THE CABLES INTO THE BACK PANEL OF COMPUTER Sarita,Vikki,SRCC,DU E-RESOURCE 51

PHYSICAL COMPONENTS OF COMPUTER Mother Board: It is also called as system board / panel board / main board. It is a large printed circuit board (PCB) inside a system unit. It holds the majority of crucial components of the system providing connectors for other peripherals. Sarita,Vikki,SRCC,DU E-RESOURCE 52 Sarita,Vikki,SRCC,DU AGP Slot Socket 7 CPU RAM Slots PCI Slots Floppy EIDE Connector Connectors ISA Slots CMOS Battery Motherboard

E-RESOURCE 53 Processor Chip: It is also called as Central Processing Unit (CPU). It carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. All calculations and processing of computer is executed using processor. The CPU plays a role of somewhat analogous to the brain in the computer. Two typical components of a CPU are the Arithmetic Logic Unit (ALU), which performs arithmetic and logical operations, and the Control Unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary. Eg: Intel Pentium 4, AMD Athlon Sarita,Vikki,SRCC,DU E-RESOURCE 54 Sarita,Vikki,SRCC,DU C.P.U.