Sony DSBK-1800 Série Manuel D'installation page 13

2
Remove the appropriate blank panel from the rear panel of
the unit.
The blank panel to remove depends on the optional board
you are installing.
To install the DSBK-1801 or DSBK-1601, you need to
remove two blank panels (see the figure below).
Remove to install the DSBK-1801/1601.
Rear panel of unit
Remove to install the DSBK-1802/1602.
Remove to install the DSBK-1803.
How to remove a blank panel
(Continued)
13