Mamiya RB67 bodies coming into the repair shop go through several testing phases to determine working condition. After a visual inspection where I am looking for signs of impact, water or sand damage, Mamiya factory test fixtures are attached to the body to determine if the camera is working to specifications. The lens/shutter is also tested at this time for overall function and speed accuracy. Focus is checked at the viewfinder focus screen.
A report will be sent regarding the state of the camera with estimate for needed repairs.
After repairs are made the camera goes through testing once more to ensure that it is as close to factory specifications as possible.