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 51 (click to view)
5. Fit the ink cartridge over the yellow mounting base with the print head facing down. (When installed correctly, the label on the cartridge will be upside down.)
CAUTION: Avoid touching the yellow mounting base on which you place the cartridge--especially the circuit board on the side of the mounting base and the film cable that extends from the cartridge holder.
6. Push the lock lever down until it snaps into place.