Olympus OM10 Jammed Shutter and Mirror Lock-Up

Shutter and mirror lock-ups usually occur at the same time because there is a mechanical coupling between them. They arranged the mechanism in such a way so that when the shutter fails to operate properly due to depleted batteries, the mirror locks-up, which also locks the shutter. The mechanism makes use of an electromagnet / solenoid type of component, which keeps the system unlocked whilst there is sufficient power in the batteries. However, as soon as the power level drops, the solenoid plunger moves the linkages such that the mirror and shutter remain locked.

Check the voltage level of the batteries by using a digital meter, because it will give a more precise reading. Depleted batteries will require replacement.

Sometimes the problem occurs with the solenoid where the grease around the plunger and linkages dries up preventing the plunger to move freely. This is an extremely delicate mechanism, which involves very small forces, and therefore hardened grease will have an impact on its proper operation. This type of problem usually occurs after the camera has been stored away for many years.

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