Acer Aspire AM5610, Service Manual

Page: 108 / 113

102 Chapter 5
Jumpers
Clear CMOS Jumper: JBAT1
There is a CMOS RAM onboard that has a power supply from external battery to keep the data of system
configuration. With the CMOS RAM, the system can automatically boot OS every time it is turned. If you want to
clear the system configuration, set the JBAT1 (Clear CMOS Jumper) to clear data.
Important! You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin position.
Avoid clearing the CMOS while the system is on, or it will damage the main board.
BIOS Write Protect Jumper: BIOS_WP3
A boot block program is included as part of the system BIOS to recover the system from a situation when the
BIOS code is incorrect/corrupted or needs to be updated. When the BIOS code is corrupted or needs to be
updated, you have to at first disable the write protect function by shorting 1-2 pin of the BIOS_WP3 jumper. Then
the boot block will try to recover the BIOS code, usually by reading it from a specially-prepared floppy disk. Under
normal operation, we suggest that you enable the write protect function by shorting 2-3 pin of the BIOS_WP3
jumper to protect the boot block from virus infection.
Slots
PCI (Peripheral Component Interconnect) Express Slots
PCI Express architecture provides a high performance I/O infrastructure for Desktop Platforms with transfer rates
starting at 2.5 Giga transfers per second over a PCI Express x1 lane for Gigabit Ethernet, TV Tuners, 1394
controllers, and general purpose I/O. Also, desktop platforms with PCI Express Architecture will be designed to
deliver highest performance in video, graphics, multimedia and other sophisticated applications. Moreover, PCI
Express architecture provides a high performance graphics infrastructure for Desktop Platforms doubling the
capability of existing AGP 8x designs with transfer rates of 4.0 GB/s over a PCI Express x16 lane for graphics
controllers, while PCI Express x1 supports transfer rate of 250 MB/s.
Important! When adding or removing expansion cards, make sure that you unplug the power supply first.