Panasonic AG7500 - Capstan spinning, but tape doesn't move

Recently got a Panasonic AG7500 professional video cassette recorder. Multiple issues, mostly mechanical. Currently looking for clues, why doesn't the tape advance in play mode, even though capstan now working correctly and following even the JOG wheel. Rewind works normally, play mode does not.

[@DesertPunks]

Hey! I got a 6500 and im trying to work out E-5 and E-6 codes on it. Have you run into those on yours?

[@diegomoschini4493]

Have you solved and fix the problem? I have the same issue. In play start mechanism, the tape doesnt move and the mechanism come back at rest position...

[@Sixta16]

Have not solved it yet. I know, been long time since, but I have moved and this equipment was left at my previous location, waiting to be restored some time in the future. Definitely not going to throw this beauty away. Seems the source of all the problems in this thing is stiff mechanics, due to shitty grease used to lube it.