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Chapter 4 - System Board 4-7
Table 4-3 Connector Functions
Connector Function
CN1 3-pin power connector
CN2 10-pin power connector
CN3 10-pin power connector
CN4 14-pin power connector
CN5 RDM connector
CN6 RDM connector
CN7 Backplane LED connector
CN8 12-pin power connector
CN9 Front panel connector for twin-tower housing
CN10 Diskette drive connector
CN11 PS/2 keyboard/mouse connector
CN12 IDE hard disk connector
CN13 Serial port connector
CN14 Parallel port/VGA port connector
CN16 Hard disk LED connector
CN17 Reset/RDM cable connector
J1 VRM connector 1 (for CPU 1)
J6 VRM connector 2 (for CPU 2)
J17 50-pin narrow SCSI connector
J20 68-pin wide SCSI connector
Figure 4-5 shows the CN15 default setting indicating the clock frequency ratio of
3. Ask a qualified technician when changing the clock frequency ratio.
Figure 4-5 Clock Frequency Ratio Setting (CN15)