Canon Demi
Canon Demi
I can't help with the exact question of meter repair. Till that is solved, though, the following might help in using your heirloom. It comes from a review of the Canon Demi (a long time ago) by A.M. Carlsson that was reprinted in THE HALF FRAMER (January, 1999).
(quote begins)
The following table shows the intermediate values set against the respective lens stops:
Aperture Shutter
f/2.8 1/30
f/4 1/45
f/5.6 1/60
f/8 1/90
f/11 1/125
f/16 1/190
f/22 1/250
(quote ends -- I hope the table format survives the posting.)
So when you set the aperture at the arrow you can have a pretty good idea of what shutter speed is being used and avoid the restriction to 1/30 sec at the flash synch setting. I haven't tried this system (the meter in my Demi still works); but, maybe it's worth a try. The Demi is a great camera.