OM-4 shutter capping or shutter bounce?

<p>A fairly recently acquired OM-4 which is mostly excellent...<br>

I'm getting an underexposed band down the right hand side of the frame, it only appears on shots taken at 1/125 - seems fine faster or slower. Is this shutter bounce or shutter capping? It's a very well defined line and extends into the frame from the right-hand side about 8mm.<br>

It's been in for repair a couple of times, but still does it. Any ideas?</p>

<p>Thanks</p>

<p>Jim</p>

<p> </p><div></div>