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USB connectors: See "Input/output connectors" on page 78 for the location of the
USB connectors.
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Audio connectors
The audio connectors are used to connect external audio equipment to your
computer. See "Input/output connectors" on page 78 for the location of these
connectors.
Line in (blue)
Line out (green)
Mic (pink)
Line out: This connector is used to send audio signals from the computer to
external devices, such as powered speakers with built-in amplifiers, headphones,
multimedia keyboards, or the audio Line in connector on a stereo system.
Note: The internal speaker in your computer is disabled when any device is
attached to this connector.
Line in: This connector is used to accept audio signals from external devices,
such as line output from external audio equipment into the computer sound system.
Microphone: This connector is used to connect a microphone to your computer
when you want to record sounds on the hard-disk drive or use speech recognition
software.
Ultra160 SCSI connector
Some computer models come with a SCSI adapter, which supports an Ultra160
SCSI internal channel in a full-featured PCI 2.1-/2.2-compliant bus master package.
This configuration supports zero wait state, 32-bit memory transfers at 160 MB per
second, when low voltage differential (LVD) SCSI peripherals are attached. This
channel supports up to 15 SCSI devices. In addition, this adapter uses:
v Double-transition clocking to achieve high transfer rates
v Domain name validation to negotiate compatible data transfer speeds with each
device
v Cyclic-redundancy checking for improved data reliability
SCSI cabling requirements: If your computer comes with a SCSI adapter, you
can install five internal or external SCSI devices using the SCSI signal cable that
comes with your computer. If you plan to attach external SCSI devices, you must
order an additional SCSI cable. To select and order the correct cables for use with
external devices, contact your IBM reseller or IBM marketing representative. To
receive an indication of SCSI hard-disk drive activity, you must also connect the
SCSI adapter to the SCSI LED (J35) connector on the system board. See "System
board" on page 41 for the location of the SCSI connector.
Chapter 5. Installing options
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Troubleshooting
