How can I clean the oil off the shutter magnet of an OM-{F, G}?
Here’s a case report for the Camera Repair FAQ. Thanks to John Hermanson, who told me how… The patient: An OM-F that was over exposing. Shutter tester showed that all exposures were longer than they should be. Even on B, the shutter would hesitate before closing. Diagnosis: Oil on the magnet. Explanation: This camera uses a very weak electromagnet to pull on a lever and hold the shutter open. If the magnet gets oily, the lever will tend to stick to it and take a moment to let go after the magnet de-energizes. Repair procedure (surprisingly quick): On this camera, the floor of the mirror box simply lifts right out. Remove the lens, hold the shutter open on B so the mirror stays up, then look carefully at the floor of the camera. You’ll see a small notch near the front right. Using the notch for leverage, pull the floor up and out, exposing the magnet. Clean the magnet with a degreaser — I did this by packing a Kimwipe around it and then applying a couple of drops of a fluorocarbon so
