Thank you for having the manual I needed for an older model Aiwa stero I had found on Ebay --- I wanted the Aiwa because I had tapes and cd's but I did not have a manual as to how to operate the system... I found what I needed and it has enabled me to set the system up for my enjoyment.
I wished detailed information of the JBL S310 and here I found it! Very happy with the service from this site!
Text excerpt from page 15 (click to view)
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Turn the screws clockwise to lift the front edge of the hood and use a spirit level to check the hood is positioned at right angles to the wall before fitting the security system. The wall brackets have two studs and when the cooker hood is hung onto the brackets the studs project trought the holes above the levelling screws. When the hood is level fit the two shake proof washers and nuts supplied to fully secure the cooker hood.