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03-25-2014, 04:35 AM   #1
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MX possible fault

So i picked up this Pentax MX cheap but I wonder what could be causing the issue or is it something I've missed.
It's the shutter speed I'm referring to. If I set it to 1/15th sec or faster the shutter seems to work fine. Set it to 1/8th or lower and the shutter stays open. "B" operates as it should.

Thoughts ??

03-25-2014, 05:32 AM   #2
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That's definitely a case for CLA.
But it won't be exactly cheap, and another MX from a seller who guarantees all functions may be cheaper.
Even if the fault is caused by dried out lubrication, or dirty guides where the shutter cloths run in.

EDIT:
I think the cloth of the shutter of the MX can be replaced.
But if the mechanics are worn out after probably 35 years of usage, this wouldn't make sense.

Last edited by RKKS08; 03-25-2014 at 05:39 AM.
03-25-2014, 06:23 AM   #3
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Possibly the slow speed 'retarder' clockwork is sticky. Send it to Eric for a CLA
03-25-2014, 06:25 AM   #4
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MX owners should "exercise" the camera periodically.
Run the clockwork on the 1 second setting.

03-25-2014, 06:31 AM   #5
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QuoteOriginally posted by wombat2go Quote
MX owners should "exercise" the camera periodically.
And that is true for all the mechanical or partly mechanical parts of all cameras, as shutters, self-timers, lens apertures.

---------- Post added 25-03-14 at 14:35 ----------

QuoteOriginally posted by arnold Quote
Send it to Eric for a CLA
Sending items to the US for repair (and get it back!) could be complicated from down under.
Have you tried it? I know Pentaxians in Germany are reluctant to do it.

Last edited by RKKS08; 03-25-2014 at 06:37 AM.
03-25-2014, 06:39 AM   #6
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QuoteOriginally posted by RKKS08 Quote
And that is true for all the mechanical
Oh Yes,
I took the top off my Ilex 3X recently , A huge shutter , it is a beautiful example of "American iron" engineering.
I checked its calibration and i know it will still be working for another 100 years.
03-25-2014, 06:42 AM   #7
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QuoteOriginally posted by RKKS08 Quote
Sending items to the US for repair (and get it back!) could be complicated from down under.
Have you tried it? I know Pentaxians in Germany are reluctant to do it.
Yes, I sent an SV over to Eric. Return post is about $70, and the service about $100 on average.
03-25-2014, 03:07 PM   #8
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Also this camera has damage to the material on the outside.
You know, the leather look stuff they put on the body, what's it called ? so I can look for it and buy some.

03-26-2014, 08:47 AM - 1 Like   #9
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QuoteOriginally posted by chromo Quote
Also this camera has damage to the material on the outside.
You know, the leather look stuff they put on the body, what's it called ? so I can look for it and buy some.
cameraleather.com


Steve
03-26-2014, 03:52 PM   #10
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QuoteOriginally posted by stevebrot Quote
Thank you excellent link and surprisingly cheap too.

The shutter has been fixed now too. Just a little lube in the right place done the job.
03-26-2014, 04:28 PM   #11
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QuoteOriginally posted by chromo Quote
Thank you excellent link and surprisingly cheap too.

The shutter has been fixed now too. Just a little lube in the right place done the job.
My pleasure.


Steve
05-29-2014, 05:32 AM   #12
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QuoteOriginally posted by chromo Quote
Thank you excellent link and surprisingly cheap too.

The shutter has been fixed now too. Just a little lube in the right place done the job.

Hi,

I saw you recently repaired your Pentax MX slow speed mechanism with a bit of lube. My MX has developed the same problem and I was wondering what part you had to lube to get it to work? I can see which is the slow speed mechanism, but I can't tell what part does what.

Perhaps this URL will help https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-prn1/54246_541945385832813_36229136_o.jpg
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