Either the shutter lubrication is getting stiff or an escapement is out of alignment.. One thing though, the rear shutter curtain must close to allow the mirror to drop. Getting the mirror to drop without that happening won't cause it to.
Andy Danzig wrote: > Thanks for the response. I wish it was just the mirror sticking. > When I remove the lens and pull the mirror down, it flips right back > up, continuing the exposure. > when I did advance the film, the shutter reset. > Although, this doesn't always happen. > Andy > > P > Please consider the environment before printing this e-mail. > > On Aug 19, 2008, at 2:32 AM, Cotty wrote: > > >> On 18/8/08, Andy Danzig, discombobulated, unleashed: >> >> >>> I have a 1979 Pentax MX. Every few years the shutters locks open. >>> The camera will be working great and without warning, in the middle >>> of >>> a roll, the shutter will lock open and won't release. I'm tired of >>> sending it off for service and am looking for help to troubleshoot >>> this problem myself. >>> Any advice or information you can provide is greatly appreciated. >>> >> You say the shutter locks open - is it indeed still exposing or is it >> just the mirror in the up position? >> >> Is the mirror sticking to the spongy mirror-stops? Next time it locks >> open, remove the lens and see if the mirror is still up. If so, try >> carefully helping it down with your finger, see if it finishes the >> exposure. >> >> Easy to see in a test - remove lens and film back and operate while >> observing. >> >> HTH >> >> -- >> >> >> Cheers, >> Cotty >> >> >> ___/\__ >> || (O) | People, Places, Pastiche >> ||=====| http://www.cottysnaps.com >> _____________________________ >> >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above >> and follow the directions. >> > > > -- You get further with a kind word and a gun, than with a kind word alone. --Al Capone. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
