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M7 Power failure


Nick De Marco

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Not so long ago I picked up a nice .85 used Leica M7. It has worked fine up until recntly. Took it off the shelf the other day and no power, and unable to use shutter. So I bought new batteries and put them in, but still the same problem. Does anyone know what this might be?

Nick

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Guest Randle P. McMurphy

Can you see the "bc" sign when you put the new batteries inside ?

Are the batterie contacts clean ?

You put them in the right way ?

Is the shutter closed ? Rewinded ?

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Have you tried the two mechanical speeds I/60th & 1/125th? I believe that these should work even with no power.

 

I recently bought a used M7 and the batteries were low as the shutter speed display was flashing after half a roll. I found that three frames from that film hadn't been exposed at all. It was as though the shutter curtain hadn't opened even though the camera seemed to fire each time I pressed the release. With a new set of batteries this problem hasn't returned.

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I agree. While my first M7 had issues, this was not one of them. And my current M7 has been flawless so far.

 

Same here. I've had 2 M7s and never had an incident like this. Best of luck to the OP.

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Thanks for the comments

Checked inside the camera. Shutter works at 1/125 and 1/60. Took out batteries, checked and cleaned contacts and re-inserted. Still nothing. Batteries brand new. If I am lucky I bought some crap expensive batteries. Anyway I think the camera just might be still under warranty as second hand camera from the shop I bought it (Red Dot), which also sends off for repairs, so I shall take it there today, try a new pair of batteries or otherwise have it repaired. Good job I have a Zeiss Ikon!

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This has happened to most of us. Generally there is only one solution: Solms.

 

I have two M7s made within a year of each other. No such problems yet. I hope you simply got some bad batteries.

 

Which prompts me to ask - is simply measuring the voltage of a battery an adequate test of its quality? Where I buy batteries they let me test them in the shop, but I only get voltage readings.

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I have two M7s made within a year of each other. No such problems yet. I hope you simply got some bad batteries.

 

Which prompts me to ask - is simply measuring the voltage of a battery an adequate test of its quality? Where I buy batteries they let me test them in the shop, but I only get voltage readings.

 

The answer is no, not really. Modern multimeters have a very high input impedence, which put simply means that the battery doesn't really know it's there. So the measurement is "off-load". Batteries that are faulty, or nearly discharged, might well read normally "off-load", but their metered voltage drops like a stone as soon as they are meaured when driving (or trying to drive) a realistic load.

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Most is a bit strong. I've not heard of such a failure before.

 

I have two M7s; both have had the problem. That makes 200%. I call that "most".

Seriously: when this happened, it must have been 7 or 8 years ago, I heard of several similar cases.

 

Both cameras needed to be sent to Solms which was a good thing. The two of them are early production run

models, and when they came back from Solms they had new MP viewfinders and optical film speed readers fitted - all under the 5 year guarantee.

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Andy Barton said:

 

When my DX reader was changed (f.o.c.) a couple of years ago, they did not upgrade the finder.

 

When my DX reader was replaced -- probably three or four years ago now -- the finder was upgraded, also without charge. Seems to have been the luck of the draw and perhaps the goodwill of individual engineers and/or managers.... Whatever the reason, I was mighty grateful.

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Let me re-phrase my comment :)

 

When my DX reader was replaced a couple of years ago, IF they replaced the finder, they didn't tell me and if they did, I haven't noticed any difference :)

 

They did give it a CLA, though and I got a year's warranty too. So, I am not complaining.

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Problem Solved

 

It was not the fault of Leica or the M7.

 

If i can blame anyone other than myself, it was those horrible expensive new batteries I bought from 'Maplin'

 

When I took the camera to the shop (Red Dot) they tried some other batteries in it and it worked fine. Then we looked at the new batteries from Maplin. They were incased in some unnecessary blue plastic casing, the effect of which prevented proper contact between them and the camera when inserted in the M7. The good people of Red Dot then cut the plastic away and those batteries worked also, as does the M7 now.

 

A happy and free story I only share so as to negate any criticism of the M7 I caused or implied.

 

And another happy story today - I had my Epson 2880 printer fixed (in warranty) and can now print again - and for the first time accepted the attraction of an extended warranty (usually a waste of money). A special price of £44 gives me 2 years full warranty on top of the nearly expired original year.

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