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 10 (click to view)
Battery Replacement 1. Using the tip of a 1/4� guitar cable, push one of the release pins in on either side of the pedal, and remove the pedal from the pedal chassis. 2. Remove the battery from the battery compartment and disconnect the battery cable. 3. Connect a new battery to the battery cable and put it back in the battery compartment. Make sure the battery cable does not interfere with the spring or pedal switch arm. 4. Place one hole of the pedal over its corresponding pin. 5. Push the opposite pin in and lower the other side of the pedal into place over the depressed pin. Release the pin. When the pedal is properly fastened, both released pins are flush with the outer side of the pedal.