CHAINTECH 9EJL4 User Manual page 16

Chapter 2
FAN1/FAN2/FAN3 (CPU/System/ North Bridge Cooling Fan Connectors):
The board's hardware management is able to detect the CPU and system fan speed in
rpm (revolutions per minute). The wiring and plugging may vary depending on the
manufacturer. On standard fans, the red is positive (+12V), the black is ground, and
the yellow wire is the rotation signal. Connect the north bridge-cooling fan to FAN3.
CN2/CN2A (CD-ROM Audio-in Connector):
Use the audio cable enclosed with your CD-ROM drive to connect the CD-ROM to
your motherboard. This will enable your CD-ROM's audio function.
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