Adjusting focus screen on Mamiya 645 Super

[cerber0s]

My 645 Super is off focus. I’ve tested with several lenses, and it’s most noticeable with wide angle lenses at infinity. When the when everything looks in focus in the viewfinder, focusing on an object far away, the scale on the lenses are at 3 meters. Images come out put of focus as well.

The mirror stop is fine.

I’d like to adjust the focusing screen, and I can get to the adjustment screws on the right side, but not the ones on the left side (under the contacts for the viewfinder). The plate with the contacts won’t come off, and I’m guessing it’s attached to a flat cable or something like that. Does anyone know how to remove the contact plate?

 

[ic-racer]

First step is to have the lens focus infinity correctly onto the film. This requires an autocollimator. Then, adjust the focus screen as needed.

 

[cerber0s]

First step is to have the lens focus infinity correctly onto the film. This requires an autocollimator. Then, adjust the focus screen as needed.

Yes, but either way I need to know how to get to the focus screen adjustment screws.

 

[ic-racer]

Yes, but either way I need to know how to get to the focus screen adjustment screws.

I guess I was considering the possibility that no one has found the screws previously and they might be still maintain the factory setting.

 

[cerber0s]

I guess I was considering the possibility that no one has found the screws previously and they might be still maintain the factory setting.

There’s probably something I don’t understand here. Would that change anything? The focus still needs adjusting, right?