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01-29-2021, 03:58 AM - 1 Like   #1
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DSLR Pentax bodies with solenoid

Pentax DSLR bodies have one or two Japan-solenoids,
(not recommended: Solenoids from some late SLR bodies, as explained HERE, nevertheless, better than no solenoid)

Avoid: Any solenoid from DVD/CD drives or a Sony-Walkman!
They have different data (impedance, holding force),
won't work in most cases but even if they do for a short period they will do damage to your Pentax!
More details as well HERE


2 solenoids:
- Pentax *ist D
- Pentax *ist DS / DS2 (Samsung GX1 and GX1s)
- Pentax *ist DL / DL2 (Samsung GX1L)

2 solenoids, but sometimes (mostly in Europe) a green China-Solenoid for the pop-up-flash):
- Pentax K100D / K110D
- Pentax K200D
- Pentax K-m (K2000)
- Pentax K-x
- Pentax K-r

1 solenoid:
- Pentax K10D (Samsung GX10)
- Pentax K20D (Samsung GX20)

Green China-Solenoid:
K30/50/500/70
KS-1, KS-2


If you check for used cameras on ebay or similar, have a close look! If the flash doesn't close, fingers off, then the solenoid in the flash-circuit isn't working or was swapped against the green one.
Sometimes you can see clear markings on the JIS screws which show the camera has been disassembled already,
possibly for the Japan-Solenoids:

Attached Images
 

Last edited by photogem; 01-29-2021 at 04:04 AM.
01-29-2021, 04:02 AM - 1 Like   #2
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you are an absolute gem, photogem.

Thanks a lot for all the effort!
01-29-2021, 07:11 AM   #3
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As always quite helpful Photogem.
01-29-2021, 07:43 AM   #4
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Great info, Heinrich - thanks for posting.

I'm glad I already own my low shutter count *ist DL, K10D, GX-1L and 3 x GX-10. In future, I can see a lot of these models being butchered for the solenoids, then re-sold on eBay and elsewhere. It's going to become harder to find unmolested examples


Last edited by BigMackCam; 01-29-2021 at 08:16 AM.
01-29-2021, 07:50 AM - 1 Like   #5
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I have a white solenoid rescued from a K-X (or maybe a K-R?) stashed away "just in case".
02-06-2021, 07:49 AM   #6
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How about analogs pentax MZ50, or MZ5, you can buy them for 5e, or even less.
You wrote in other topic that that they ma have reverse polarity, and the force might be a little bit different.
but are they good enough to do the job? for longer time

well, it is much easier to scrap mz50 than kill fully funcional *ist
02-06-2021, 08:59 AM   #7
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QuoteOriginally posted by pentarad Quote
How about analogs pentax MZ50, or MZ5, you can buy them for 5e, or even less.
You wrote in other topic that that they ma have reverse polarity, and the force might be a little bit different.
but are they good enough to do the job? for longer time

well, it is much easier to scrap mz50 than kill fully funcional *ist
Read this one carefully:
A LITTLE BIT OF HISTORY: Development of the solenoid in Pentax cameras - PentaxForums.com
Manual: Solenoid Replacment Pentax K-30/50/500 + Discharge of flash-condenser - PentaxForums.com
This thread is for the 100% correct solenoid only.

The polarity can be changed, but not the 6V vs. 7.2V difference, which shows in release-time.

I would not kill any fully functional older Pentax DSLR bodies, but again and again damaged ones show up.

I see it like this:

This is a Pentax-forum and it is also for "how to take good photos":
We would not even discuss here how to take mediocre photos.
Nobody would consider that.
We discuss how to do it the best (and correct) way.



And that's how it is with the repair:

We discuss how to do it the best way!



Even the oldest, the K30 (which is a K50 with different design, particular if it got our 1.10 firmware) is still a great camera and it is WR.
The K-S1 is the smalles full-equiped DSLR of the world (I don't count some Canons, they lack too much which is important, but that is just mho)

Any of these if repaired proberly will work for a long time and I know for sure that any good photographer will get photos out of them which
will be right up in top league (well, even a K10D can produce something very special)


So if I take on all this work and just at the most spend US$40 for the correct solenoid, using something that is "just kind of o.k." is to me just mean towards a still great body.

If my Pentax would be really run down, then yes, but then I can also file/sand?


I don't know how much I'd invest into a K500, but would measure that on shuttercount condition as well.

Last edited by photogem; 02-06-2021 at 10:55 AM.
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