Lenovo NetVista A20 (English) User guide - Page 89
Hard Disk Connector IDE1 & IDE2., Aux Line In connector.
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The system board, sometimes called the planar or motherboard, is the main circuit board in the system unit. It supports a variety of devices and provides other basic computer functions that are preinstalled or that you can install later. The system board shown on the previous page has the following parts: 1 Power connector. 2 Memory module sockets (for DIMMs). Your system board has two 168- pin sockets for Dual Inline Memory Modules (DIMMs). The DIMM sockets support 3.3V single-or double-sided Synchronous DRAM (SDRAM). The maximum system memory is 256MB (64 megabit technology) or 512MB (128 megabit technology) SDRAM. 3 Floppy Disk connector. 4 Hard Disk Connector (IDE1 & IDE2). 5 Battery. 6 Case connector. Power Switch, Power LED, Speaker and HDD LED are all connected to this connector block. 87 Clear CMOS jumper. 8 PCI adapter card connector. This is the first PCI adapter card connector. 9 PCI adapter card connector. This is the second PCI adapter card connector. 10 PCI adapter card connector. This is the third PCI adapter card connector. 11 Modem-In connector. 12 Aux Line In connector. 13 CD-In connector. 14 Audio Port connector. 15 Serial Port connector 1. 16 VGA Port Connector. 17 Parallel Port Connector. 198 Serial Port connector 2 (Optional). 19 Universal Serial Bus Port. 20 Mouse and Keyboard connector. Adding and replacing system board components 7-3