Strangely enough another try today came up with this I posted around 2 years ago.
Please note it’s for the removal of the NC1 door cards and actuator. The guts the other side of the door card and actuator will be pretty much the same on later models (NC2>)
The door card on NC2 onwards I’ve never removed (never owned) so perhaps someone else can chip in with that, there can’t be much difference.
Hope this helps but of course before going to the trouble of removing and buying a new unit, or if available SH (bit rare to find on ebay etc) do make sure that this is your particular problem. What you’re experiencing suggest it is the actuator at fault.