Mamiya 6: Power Switch Not Turning Off After a Previous Repair
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
This Mamiya 6 had the complaint of the power switch not turning off. Not a common issue so the top cover needed to be removed to investigate
The problem was caused by a previous repair (Oddly enough, this is the second camera that I have had on the bench in the last two days that was damaged by a previous repair). Photo two shows a close up of the main switch board and if you look at the two crosspoint screws holding it to the body, you can see that they are not across from each other as they should be. The one screw to the right is in a lower hole in the board. This threaded hole is for testing purposes, it allows the circuit to connect when the top cover is removed. Previous technician did not remove the screw when they were done with a service so the circuit was always connected. Also, photo three show a spring plate that I am installing that was missing (it is easy to fall off when the top is removed).
Fortunately for my client, the service turned out to by fairly minor (just changing the position of the screw) once the top cover was removed. Of course, the rangefinder was calibrated while the camera was apart.
Please be careful if you are repairing Mamiya 6/7 cameras. They have some parts and mechanisms that are different than other model cameras.
