Polaroid sx-70 fresnel mirror lifting delay problem

[jacksonwade]

My Polaroid sx-70 sometimes has a delayed ejecting problem. When I press the shutter, I hear a very short noise, but the image can still be seen in the viewfinder, and then nothing happens. After waiting maybe dozens of seconds, the camera suddenly kicks into gear, snapping the last moments and ejecting the film. Does anyone know the reason? How can I fix it?

According to my research, the problem should be a delay in lifting the fresnel mirror.

 

[Andrew O'Neill]

I wish I knew the answer because mine occasionally does it, too... but not for dozens of seconds. Maybe for 1 or 2 seconds.