Mamiya 7II: Rangefinder Replacement After Failed Calibration
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
This Mamiya 7II arrived for a repair to the cable release socket initially. As part of the repair process, the complete camera gets evaluated and I found that the rangefinder was not calibrated. Client approved the repair and the rangefinder service. But, the rangefinder would not calibrate and I found the internal rangefinder lens ring was loose and adjusted all the way clockwise. Not a good sign.
Ultimately, the rangefinder would not calibrate or stay in adjustment. I don’t know why, perhaps an impact to the camera? There are some scuffs to the top cover, really can’t say what caused the issue at this point. The only solution that I have in cases like this is to replace the entire rangefinder (after first making sure all the parts in the rangefinder are tight and look in place). This is not something that I do that often as it is a costly repair.
Replacement rangefinder being installed in photo three. The fourth photo shows the circuit board with the viewfinder meter lights and the larger red led warning light is visible sticking up.
