Thanks for the info. Unfortunately, as my luck might have it, all of the models that you refer to are NOT available on the LDDB index of manuals.
I'll do some Google searching to see if I can locate them elsewhere and if so, be sure to submit them for inclusion on LDDB.
My specific reason for wanting the service manual is that the player I am getting has the issue that "the disc tray gets stuck". I'll have to see exactly what that means when I get it in later this coming week. Might just need to be cleaned, regreased and possibly the tray timing reset. Either way, it should be a step up from my current CLD-980.