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04-01-2017, 01:52 AM   #16
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That is reassuring. Shame that the basic ZX series had this problem, I really loved my ZX-5n but glad I sold it before it blew up. Happy to have a PZ-1P which seems immune to this problem. It really is a helluva camera. Funny how so many hesitate to call it a "pro" model, using terms such as "semi-pro" and such when modern "Pro" DSLR's have no chance of lasting decades like the PZ-1P.

09-26-2018, 12:32 AM   #17
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I know this thread is old, but I would like to share info on how to get the mirror motor gear repaired.

My MZ-S gear died in 2012 and no one in Singapore or Malaysia could fix it and so it stayed in my Dri cabinet until this year when a buddy when to Japan for a business trip and happened to find this company that can repair all older Pentax bodies and lenses. The company is staffed by former Pentax Engineers that were laid off by HOYA when they bought Pentax.

In my case the plastic gear had melted in the camera and so could not move the mirror.

The company is called NSB Tekunos.

Address is
265-1 .kakuyama.ogawa-machi.hiki-gun.saitama
355-0316
Attn: Mr Toshiyuki Nishimura
Tel: +81-493-59-8616 (Voicemail is in Japanese though, I cannot understand a word)
10-17-2018, 08:10 PM - 1 Like   #18
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QuoteOriginally posted by felixkh Quote
I know this thread is old, but I would like to share info on how to get the mirror motor gear repaired.

My MZ-S gear died in 2012 and no one in Singapore or Malaysia could fix it and so it stayed in my Dri cabinet until this year when a buddy when to Japan for a business trip and happened to find this company that can repair all older Pentax bodies and lenses. The company is staffed by former Pentax Engineers that were laid off by HOYA when they bought Pentax.

In my case the plastic gear had melted in the camera and so could not move the mirror.

The company is called NSB Tekunos.

Address is
265-1 .kakuyama.ogawa-machi.hiki-gun.saitama
355-0316
Attn: Mr Toshiyuki Nishimura
Tel: +81-493-59-8616 (Voicemail is in Japanese though, I cannot understand a word)
Thanks for sharing your experience, this is good to know. I very much enjoy my MZ-S, which is still working and I hope it continues to do so - same with my ZX-L. However, my ZX-5N failed, so I know what this gear motor failure is like.
10-17-2018, 10:05 PM - 1 Like   #19
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QuoteOriginally posted by OldChE Quote
Thanks for sharing your experience, this is good to know. I very much enjoy my MZ-S, which is still working and I hope it continues to do so - same with my ZX-L. However, my ZX-5N failed, so I know what this gear motor failure is like.
I think the weather also plays a part. I stay in a relatively high humidity region with all year summer so we do need to keep gear in dricabinets and if not things will break down and spoil.

10-18-2018, 08:59 AM - 3 Likes   #20
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I still find it odd that so many MZ and Z variants have met their demise due to the failing of that drive gear, yet @felixkh 's account above is literally the only one I've read on these forums or otherwise specifically related to the MZ-S. Seems reasonable to assume that either the gear was switched in production at some early point, or that there is simply more to it relating to mechanical differences and other tolerances. I hope to never find out, but I've two replacement brass pieces on stand-by that I ordered 2 or 3 years ago. My MZ-S is still purring along happily and it was a very (already) well-used copy when I purchased it 4 (or 5?) years back. But then again, my MZ-3 is also just fine on with it's original gear. Knock on wood in both cases I suppose, however it's still interesting that we've simply heard of virtually no MZ-S failures in this regard beyond speculation and (that I know of) one direct account.
10-23-2018, 06:56 AM - 1 Like   #21
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I've had two MZ-S and I've sold both because of fear of eventual demise of a very expensive (to me) camera.

The "melting" issue in the MZ-S rang a bell, but not for the mirror gear. The only issue I experienced was with the weather sealing rings on the big control dials. My first MZ-S became almost impossible to adjust -- a trip to the local repair shop showed that the rubber rings had melted and were jamming the works. The shop cleaned out the rubber and it worked perfectly. So long as I was OK with not having weather sealing on those dials, it was great. My second MZ-S was a bit grabby on the dials but not as bad as the first, so I didn't have it cleaned out.

Of course in the mean time I've added an MZ-5n and MZ-3 to the collection. So far the MZ-3 is still going but the MZ-5n packed it in this summer. I ordered 2 custom replacement gears in brass in case I ever decide to have one of these cameras fixed. So maybe it's time to embrace the MZ-S, knowing that I have a gear in stock if it should ever fail?
10-30-2018, 04:10 PM   #22
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QuoteOriginally posted by filmamigo Quote
I've had two MZ-S and I've sold both because of fear of eventual demise of a very expensive (to me) camera.

The "melting" issue in the MZ-S rang a bell, but not for the mirror gear. The only issue I experienced was with the weather sealing rings on the big control dials. My first MZ-S became almost impossible to adjust -- a trip to the local repair shop showed that the rubber rings had melted and were jamming the works. The shop cleaned out the rubber and it worked perfectly. So long as I was OK with not having weather sealing on those dials, it was great. My second MZ-S was a bit grabby on the dials but not as bad as the first, so I didn't have it cleaned out.

Of course in the mean time I've added an MZ-5n and MZ-3 to the collection. So far the MZ-3 is still going but the MZ-5n packed it in this summer. I ordered 2 custom replacement gears in brass in case I ever decide to have one of these cameras fixed. So maybe it's time to embrace the MZ-S, knowing that I have a gear in stock if it should ever fail?
Yes, you should be using the MZ-S more often.
10-30-2018, 06:42 PM   #23
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FWIW, There was an eBay auction for an MZ-S a few months ago with a broken mirror gear. Just some more evidence that at least some of these cameras have the plastic gear problem.

10-30-2018, 07:15 PM   #24
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I hope my MZ-S never suffers this issue. It's the best camera I've ever used for me.
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