IBM 6643 - Manual (Page 32)

2. Remove the four thumb screws holding the system board cover.
3. Lift the rear EMC cover up and rotate it as shown by the arrow. It is not
necessary to remove the hard disk drive assembly.
Diskette drive/CD-ROM drive/DVD drive removal
1. Remove the upper base cover, see“Upper base cover and base cover wing
removal” on page 22.
2. Release the drive unit device bay to the down position.
3. Remove the device bay bezel by gently pulling it out from both sides.
4. Unplug the two signal cables from the interface card.
5. Push the two white plastic release clips on the top and side of the drive
assembly forward to release the drive assembly from the device bay.
6. Unplug the other two cables (power and speaker) from the interface card.
7. Remove the drive bracket assembly from the front of the device bay.
Removing the drives from the drive bracket assembly
1. Unplug the back interface card from the drives.
2. Remove the eight screws from both drives.
3. Pull drives out from the drive bracket assembly.
24 Hardware Maintenance Manual