Dell Precision 620 User Manual download pdf (Page 74)

Microphone Jack

You can use the microphone jack (see Figure 11) to attach a standard personal computer microphone. Connect the audio cable from the

microphone to the microphone jack. The microphone input is a mono source with maximum signal levels of 130 millivolts root mean squared

(mVrms).

Figure 11. Microphone Jack

Audio Line-Out Jack

You can use the audio line-out jack (see Figure 12) to attach most self-powered computer speakers with integrated amplifiers. The audio line-out

jack is amplified enough to power most head phones. Connect the audio cable from the speakers to this jack.

Figure 12. Audio Line-Out Jack

Audio Line-In Jack

You can use the audio line-in jack (see Figure 13) to attach record/playback devices such as cassette players, CD players, and VCRs. Connect

the line-out cable from any of these devices to the audio line-in jack on the back of your computer.

Figure 13. Audio Line-In Jack

Interrupt Assignments

Problems can arise if two devices attempt to use the same IRQ line. To avoid this type of conflict, check the documentation for the default IRQ line

setting for each installed device. Then consult Table 9 to configure each device for one of the available IRQ or other lines.

Table 9. Interrupt Assignments

Signal

I/O

Definition

Vcc

N/A

Supply voltage

DATA

Data in

+DATA

Data out

GND

N/A

Signal ground

NOTE: Do not use standard microphones. Use only microphones designed for use with computers.

NOTE: Do not use unpowered speakers. Use only self-powered speakers with integrated amplifiers.

NOTE: Interrupts for the integrated sound, NIC, and both SCSI channels are assigned dynamically by the computer's basic input/output

system (BIOS).

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Dell Precision 620 User Manual Page 74