Repair information needed Petri FTX

I had recently acquired a Petri FTX in it's guise as a K-mart Focal TTL. Shutter is extremely slow when set to anything below 1/15th of a second (tick......tick....tick..thick,tick, kerchunk). Likely it's some gummed up lubrication somewhere in the mechanism. I had already looked in the bottom of the camera and everything seems in order there. Top of the camera is fairly obvious on how it should be opened, and I've identified the screws on the knobs that need to be undone, except for one. I have no clue how the ISO selection knob should be removed. I can't identify any screw holding it in, and I don't want to try to force, and potentially (read likely) break it.

Information on repairing these cameras online is rather sparse, and what there is didn't cover removing the top in any well documented manner. If there is anyone here who have been inside one of these cameras I'd appreciate some pointers before I risk breaking it. It's a lovely camera and I have a soft spot when it comes to Petries.

I've taken a FT apart just to see how they work and see if repair was possible. The camera I took apart the shutter was frozen, it was gear that had broken teeth, 3 in a row, without a replacement I could not fix it. On the FT one of screws found on the bottom, not sure of it's function, seems to to be made of brass. I used a solvent to loosen any lock thread, but using standard screw driver I striped the slot. I have a few texts on camera repair, could not find reference to brass screws. Not sure how the teeth on the gear got broken, I can see 1, but three? I have 2 more FT and a FT1000 and FTEE, the lens are pretty good, the mechanics are bottom feeders. I don't recall how I removed the top plate, I may have saved the digital images I took as I was disassembling it. I will post you if I find them.

Paul Howell said:

I've taken a FT apart just to see how they work and see if repair was possible. The camera I took apart the shutter was frozen, it was gear that had broken teeth, 3 in a row, without a replacement I could not fix it. On the FT one of screws found on the bottom, not sure of it's function, seems to to be made of brass. I used a solvent to loosen any lock thread, but using standard screw driver I striped the slot. I have a few texts on camera repair, could not find reference to brass screws. Not sure how the teeth on the gear got broken, I can see 1, but three? I have 2 more FT and a FT1000 and FTEE, the lens are pretty good, the mechanics are bottom feeders. I don't recall how I removed the top plate, I may have saved the digital images I took as I was disassembling it. I will post you if I find them.

Click to expand...

Strange. I was surprised at how well built my copy was when I took the bottom off. Perhaps I'm easily impressed. If you can find those images that would be great.