Media Subsystem - IBM pSeries 690 Service Manual

Media Subsystem

CD-ROM, DVD-RAM, or Tape Drive
Attention: DVD-RAM and 4-mm tape drives can be located in the rear of the media subsystem only if
the room is maintained at a nominal room temperature of 24°C (75.2°F).
Attention: Do not open the drive; no user adjustments or serviceable parts are inside.
CAUTION:
All IBM laser modules are designed so that there is never any human access to laser radiation
above a class 1 level during normal operation, user maintenance, or prescribed service conditions.
Data processing environments can contain equipment transmitting on system links with laser
modules that operate at greater than class 1 power levels. For this reason, never look into the end
of an optical fiber cable or open receptacle. Only trained service personnel should perform the
inspection or repair of optical fiber cable assemblies and receptacles.
C25, C26
Removal
1. Ensure that the SCSI drive is in idle mode (the activity light remains off).
2. Loosen the thumbscrew that holds the SCSI drive assembly in the subsystem (the top screw is for the
drive to the right, and the bottom screw is for the left drive).
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3. Grasping the thumbscrew and not the bezel, carefully pull the drive assembly out until you can access
the cables at the rear.
Attention: When performing the next two steps, always disconnect the power cable before
disconnecting the SCSI cable.
4. Disconnect the power cable from the rear of the drive assembly.
5. Disconnect the SCSI cable from the rear of the drive assembly.
6. Remove the four mounting screws that hold the drive or blank to the carrier bracket and remove it from
the carrier.
Replacement
Note: Ensure that the cables are routed through the grommet at the rear of the carrier.
Attention: When replacing a SCSI drive, always connect the SCSI cable before connecting the power
cable.
Replace in reverse order.
982 Eserver pSeries 690 Service Guide
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SCSI
SCSI
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