I just picked up a '04 JDM Accord, and I have no idea how to operate the CD changer, and the car didn't come with the owner's manual. I can put in one disc easily, but how to load another? As far as I can see, the unit is identical to all Accords. Any help would be appreciated!

Push Load button, wait for LCD to say 'Load' then put CD in the slot - it will pull it in. Hit Load again and repeat.

The manuals are online, go through the FAQs here and you'll find the online manual links.

Problem solved, now you have an OM.

I went through the TSX FAQ here: https://acurazine.com/forums/1g-tsx-2004-2008-124/faqs-04-05-tsx-information-center-652196/ and found no reference to an online manual, any help?

Its a seperate thread under FAQ titled "TSX Owners Manuals". We have links to on-line versions of all the First Gen owners manuals. Follow this link

Maybe this is a dumb question, but did the JDM Accord come with a changer? Or is a single disc unit? Can you post a picture of the head unit?

If it's the same as the changer in the TSX, there's a load button to the left side of the CD slot, an eject to the right. The 6 presets select which disc you want to listen to and the seek up and down changes the tracks forward and backward. Holding down the seek button forward or back allows you to fast forward or rewind the track.

Additionally.... On the changer, you can HOLD the Load button, and after a second or two, a beep! (and the CD slot light) indicates that you an load multiple discs. Likewise, holding down the Eject button, a beep! sounds (I think), and all the discs are spit out in order, beginning with the last one being played.