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 66 (click to view)
Appendices
Attaching the rack-mount adaptor
fig.um550
1. Remove three screws (on each side) from the right and left panels of the UM-550. 2. Using the screws you removed in step 1, attach the rack-mount brackets to the UM-550.
* You must use the screws that you removed. Do not use any other screws.
Attaching the desk-stand mount
fig.um550 fig.cushion
1. Remove three screws from the right panel of the UM-550. 2. Affix the cushion set (stickers) to the locations shown in the diagram at right.
Cushion set (stickers)
3. Using the screws you removed in step 1, attach the desk-stand mount to the UM-550. * You must use the screws that you removed. Do not use any other screws.
When standing the UM-550 on its side, make sure to position it so the power switch is at the bottom.