Lenovo C345 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. HDMI-out connector
2. CPU and socket
3. Memory connector
4. USB connectors
5. Headphone connector
6. Microphone connector
7. Memory card connector
8. Speaker connector
9. Power control connector (TBD)
10. Wi-Fi card connector
11. TBD
12. Battery
13. TV-Tuner card connector
14. Rear I/O module connector
15. DC-in connector
16. Front function board (TBD)
17. Hard disk drive power connector
18. Optical drive SATA connector (Red)
19. Hard disk drive SATA connector (Balck)
20. Converter connector
21. Camera connector
22. System fan connector(22&23 TBD, LVDs is missing
in the drawing)
.
Chapter 7 Locating connectors, controls and components
25