Lenovo IdeaCentre B345 Hardware Maintenance Manual page 31

Identifying parts on the motherboard
The motherboard (sometimes called the planar or system board) is the main circuit board in your computer.
It provides basic computing functions and supports a variety of devices that are factory-installed or that
you can install later. The following illustration shows the location of connectors and components on the
front of the motherboard.
1. Fan connectors
2. Camera connector
3. Touch control board connector
4. Front function board connector
5. Optical drive SATA connector
6. Hard disk drive SATA connector
7. Scalar board connector
8. B-CAS Connector
9. Wi-Fi card connector
10. TV-Tuner card connector
11. Rear I/O connector
12. Power switch board connector
13. Speaker connector
14. Front LED indicator board connector
15. Card reader
16. USB connector
17. Microphone jack
18. Headphone jack
19. USB connector
20. Memory slots
21. CPU Socket
22. Power supply connector
23. Battery
24. Power supply connector
25. Optical drive power connector
26. Hard disk drive power connector
27. Bluetooth connector
.
Chapter 7 Locating connectors, controls and components
25