[frankwm]

This can be an issue with powered Akai doors.
Only a few days back I took a mint 1987 GX-8 from its box - stored
about 2 years.
Inserted tape - then door wouldn't re-open.
Took some time to realise the problem was after the door shuts and the
tape heads are engaged for playback that the transport mechanism didn't
then disengage - leaving the casstte 'locked' into place - with the
powered door trying to open.
The problem is caused by the grease points having solidified/thickened
over time (same on 8000 series Beocords).
If the Philips mechanism is similar check the raise/lower cycle without
a tape in place. If it doesn't disengage smoothly and quickly then
simply oil the relevant joints.