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Pentax 645 motor runs continuously


a._valerio

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I obtained a used Pentax 645 recently. While testing out the shutter with the

back plate on, I dry-fired the camera without film a number of times to make

certain it was working right.

 

Somehow, I managed to fire off 58 frames in this manner, reaching the limit of

the frame counter. The motor then started to run, and stayed on approx 30 sec.

I assume it was trying to maybe rewind the film or something (I'm coming from

35mm SLRs and this would be my first medium format SLR).

 

The thing is, camera now runs its motor every time it's switched on. THe

shutter won't release or anything!

 

Anyone know if this is typical...or might there be something wronge with this

camera?

 

Thanks in advance!

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Try taking out the batteries and also the lithium one on the bottom. Maybe the logic got flip-flopped somewhere in there. There's no rewind on a 120 film camera BTW--it just ends up backwards on the take up spool. Also the end of film indicator is a little switch that is blocked by the paper in the film backing. Sometimes these contacts get dirty--I would manipulate all the contacts a few times to see if this clears up the problem.

 

HTH.

 

Warren

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  • 2 weeks later...

I'm the one who sold Mr. Valerio the 645. I had used it semi-regularly without problems, but I decided to upgrade to a 645n. He returned it to me and I'm giving him a full refund.

 

The problem is as described. I loaded a roll of film and the camera zipped right through it, neatly placing it on the pickup reel. The motor then stopped.

 

I turned the camera off, removed the insert, and turned the camera back on. The motor started running again.

 

Since I don't have a spanner wrench to change the lithium battery, I'll take it into SK Grimes/EP Levine in the morning and see if can be saved.

 

I'll report the final outcome here.

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