By now I have a lot of experience on repairs of many early Canon SLRs. They're great to work on, but the one issue I see across them consistently is miscalibration (or previous faulty servicing) of the shutter speeds like 1/8-1/30s. I've seen brief mention that it can be fixed by adjusting the 2nd curtain release lever, and that the "tween" speeds are controlled by doing as such, due to those speeds functioning through However I see no way of adjusting it, except by height, which I don't believe is the factor.
I also have experience in working on Pentax cameras, and on those it is easily corrected by shifting the position of the pallet rod at a fixed speed (1/15 I believe).
Interestingly, on both cameras, miscalibration of the speeds can result in a "whirr" sound after the shutter is fired on any slow speed, and/or cause erratic behavior where the speeds cycle back to slow speeds such as both 1s and 1/8s performing as 1s, which I only assume is caused by severe mis-positioning of one of the rods.
Anyone ever run into this on these old Canons?
I also have experience in working on Pentax cameras, and on those it is easily corrected by shifting the position of the pallet rod at a fixed speed (1/15 I believe).
Interestingly, on both cameras, miscalibration of the speeds can result in a "whirr" sound after the shutter is fired on any slow speed, and/or cause erratic behavior where the speeds cycle back to slow speeds such as both 1s and 1/8s performing as 1s, which I only assume is caused by severe mis-positioning of one of the rods.
Anyone ever run into this on these old Canons?
