Sony DSBK-1800 Série Manuel D'installation page 12

Installation
Installation
• If this option is installed incorrectly, personal injury or
• Before starting the installation operation, be sure to switch off
Proceed as follows to install an optional DSBK-1801/1802/
1803/1601/1602 board in the DSR-1800/1800P/1600/1600P
(called "the unit" below).
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Cautions
damage to peripheral items may occur due to fire, shock, or
other accidental circumstances. To avoid such risks,
installation should be performed by qualified service
personnel.
the power of the videocassette recorder or player.
Remove the top panel of the unit.