Hi, I have a story to address emaks k888 original post
For several decades I have owned a Hasselblad 2000FC which together with a 500CM shot most of my professional studio work on colour reversal and negative film stock
However after leaving the business of commercial work my Hasselblad kit simply lay stored in equipment cases, whilst my personal project photography was done with 35mm cameras. Several years ago I decided to resume using medium format to make black and white prints, so both Hasselblads were put back to use
The 2000FC worked as normal fitted with 'C' type leaf shutter lenses until one day it began misfiring. On pressing the shutter release the mirror would flip up but the focal plane shutter blinds would not open or allow the rest of the exposure sequence to trigger. Then from years ago I recalled a comment from a Hasselblad UK technician when I had the camera serviced calling into the question the reliability of the 2000FC electronics. I assumed that was it, the electronics were kaput and there is no one who is able to make repairs to the 2000 series cameras plus there are absolutely no spare parts available
During my research into repair solutions, I discovered some online conjecture about the electromagnets or solenoids going bad that control the shutter opening and closing. In reality they only fail to operate when there is insufficient power to energize the coils. Occasionally I would try winding and firing the 2000FC but it still refused to work even with a new battery, but sometimes there would be a rapid clicking noise from inside the body and a couple of times the shutter would open and close twice then go dead again. There must be something going on I thought
Thinking back to previous repairs I have made to cameras and equipment with built in electronics the most common problem was poor conductivity or broken continuity in the electrical circuits caused by corrosion or oxidation on metal parts often not easy to see. As I have a dead 2000FC body, I could disassemble it, clean up as much as possible, then reassemble to probably still have a dead camera. So nothing lost and nothing gained
Knowing that Hasselblads are extremely complex mechanical machines I took extra care in separating the inner body core from the outer shell and made certain that nothing was touched that would alter the alignment of film plane, focusing screen, mirror, gear trains or lens register. Then I used an aerosol can of electrical contact/switch cleaner with a long straw nozzle to spray into the base of the camera where most of the electronic components are fitted.
Wiped clean with alcohol the complex array of gold plated tracks and resistors on the side that control shutter speeds. Allowed all to dry off. Finally lubricated with watch oil or synthetic grease any moving parts that might need it, then put it all back together again
Fitted fresh battery, turned the wind on crank, pressed the shutter button and VOILA! the camera went through the exposure sequence perfectly and worked at all shutter speeds. So I now have a resurrected 2000FC that works great in focal plane or leaf shutter mode with a newly acquired 120 macro lens