HP 748 Service Manual download pdf (Page 80)

7-4

Using Mass Storage Devices

CD-ROM Drive and CD-ROM Media Descriptions

NOTE: The Volume Control, Headset Jack, and Audio Jack features of the CD-ROM

drive are supported through applications only.

CD-ROM Media

CD-ROM discs are 120 mm (4.7 in.) in diameter, and use one data surface

with a capacity of approximately 600 megabytes. The data surface contains

pits and flat spots arranged in a continuous spiral track, which is read at a

constant speed. You may access files and data stored on a CD-ROM disc,

but you may not write files or data to a CD-ROM disc.

CD-ROM data discs are identical to audio compact discs (CDs) except that

they store computer data and information.

Table 7-1 CD-ROM Controls and Features

Control/Feature Purpose

Headset Jack You can plug mini-headphones with a 3.5-mm diameter

miniature stereo plug into this jack.

Volume Control Use the volume control to adjust the audio output volume to

the headset jack.

Busy Indicator The Busy Indicator lights during a data access operation and

blinks during a data transfer. The indicator blinks initially

and then stays lit when there is one of the following:

• A defective disc

• A disc insertion error (for example, an upside-down disc)

• No disc present

Eject Button Press the Eject Button to open the Disc Tray and insert or

remove a disc. When the drive is in use, you must press the

eject button for more than one second to open the Disc Tray.

Emergency Eject By removing the Phillips type screw and inserting the end of

a paper clip, you can open the Disc Tray when the

workstation does not have power.

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HP 748 Service Manual Page 80