User Guide

3-22 AcerAltos 19000Pro4 System Guide

3.2 System Board

The system board carries all the major system components including

the two sockets for the Intel Pentium Pro CPUs. Figure 3-23 shows

the major components on the system board.

3.2.1 Layout

1. VRM connector 1

2. Pentium Pro CPU socket 1

3. VRM connector 3

4. Pentium Pro CPU socket 3

5. BIOS

6. Battery

7. +12V, +5V downside power connector

8. Buzzer

9. Narrow SCSI interface

10. Wide SCSI interface 1

11. Wide SCSI interface 2

12. PCI slots

13. EISA slots

14. Keyboard controller

15. Pentium Pro CPU socket 4

16. Parallel port

17. Video port

18. Serial port 1

19. Serial port 2

20. Mouse port

21. Keyboard port

22. VRM connector 4

23. VRM connector 2

24. RDM connectors

25. Pentium Pro CPU socket 2

26. ±12V, ±5V power connector

27. +12V, +5V power connector

28. VCC3 power connector

29. Memory board slot

30. IDE connector

31. Front Panel Connector

32. Diskette drive connector

Figure 3-23 System Board Layout