Pentax 6x7 shutter speed / curtain problem

Hi guys!

I'm new to the forum so excuse me if I'm posting in the wrong sub.

I've recently bought a pentax 6x7, it seemed to be working since it fired, battery indicator worked, and the mirror didn't stick. However upon closer inspection, the curtains didn't seem to open (they move but don't open). And setting a speed doesn't seem to be doing anything. Whether on bulb mode or any other speed, it seems to be firing at the same speed on any of the settings. I have cleaned the contacts as seen in a couple of youtube videos. Even cleaned the contacts under the speed setting dial. But still the same problem.

Does anyone know if there is a fix i can do myself? In other words does anyone know what the problem might be? It doesn't necessarily sound like a pure curtain problem to me since firing different speeds don't do anything. Or do I have to send it in for repair, and if so is it worth it?

Thanks in advance!

I'm remembering from stuff I haven't looked at for a very long time, but it depends I think on which version of the Pentax 6x7 you have. I have a feeling that the setting of speed before or after winding the shutter might be critical in early models and it could be easy to upset the shutter mechanism. Do you have the instruction book? If not, then Oldtimer Cameras probably do and a copy might answer your questions.

If it's not working though, ultimately a service may well be required. These are very large focal plane shutters and they do need some servicing at regular intervals.

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Best regards, John

Thanks for your reply! Setting the speed before or after winding the shutter does not make a difference.
But yeah since I'm sure the previous owner hasn't touched it in 30 years it might be overdue for a servicing. It is the i think earliest version of the 67 so the 6x7 no MLU.

Given how much 67s are going for these days a service is probably worth it.

K.

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Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
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The prices are ridiculous to be honest. Some repair places I contacted pretty much said they cant do anything for me since parts are apparently impossible to come by (here in the Netherlands). I already fell in love though so I either buy a new one for a astronomical amount of money or use a service manual and take the old thing apart. If theres anyone out there with tips please let me know!