Yamaha A3000 Owner's Manual page 326

Installing an Internal Hard Disk
Appendix
324
Check the hard disk settings.
2.
Be sure that the hard disk's terminator is set to ON. For information about how to make
this setting, refer to the instructions provided with the disk.
It is recommended that you set the hard disk's SCSI ID to 4, although you are free to set
the ID to any value other than 6 (the factory-set ID for the A3000). For information
about how to make this setting, refer to the instructions provided with the disk.
Switch off the A3000 power, and unplug the power cord from the wall outlet.
3.
Remove the screws holding the A3000 top cover in place.
4.
Set the A3000 upside down on the workbench and unscrew the 6 screws along the sides
of the bottom (see drawing). Then turn the A3000 right side up again and unscrew the 3
screws along the top. Then unscrew the 5 screws holding the cover to the rear panel.
Bottom
Hold the two sides of the cover and slide the cover straight back (over the rear
5.
panel) and off.
Top
Rear panel