It took about 24-hours after my payment before I was able to get to the download. Apparently, payment processing is not 100% automated. That is no big deal, just be aware of that going in.
After I got to it, it was in good shape, easy to read, etc. Not some cheap FAX copy looking thing.
Also, this site was the cheapest I found. Another Plus!
Text excerpt from page 14 (click to view)
CDX-5V661/5V661A/5V661D/5V661S
2-17. OP BLOCK ASSY
1 two flexible board (CN201, 301)
3 cover (flexible)
2 two screws (special flat head M1.7)
5 Rotate the OP block assy in the direction of arrow B. Remove the OP block assy up straight carefully to prevent the portion a from being caught by the tray. a
tray
4 Slide the lever fully in the direction of arrow A. A A
A B A
4 Slide the lever fully in the direction of arrow A.