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Figuring out what's wrong with shutter (Yashica-Mat LM)

Started by Brownman, Jul 01, 2010, 02:22 PM

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Ron_g

Jul 31, 2010, 09:36 PM #60 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
Alex,here is a simple schematic of a typical soundcard based shutter tester.Mine is similar.
http://www.davidrichert.com/sound_card_shutter_tester.htm
There are a f

Mareklew

Aug 07, 2010, 10:57 AM #61 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
Try the circuit from Ron, it works best albeit requires power.
To check the PC side, just plug a mike jack in, nothing attached, you should get noticeable increase in signal level as soon as you touch middle contact with your bare finger. If yo

Donyet

Aug 10, 2010, 05:30 PM #62 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
Hi Marek,
 
I checked the PC at home and there seems to be a problem with the sound board, so I checked the one I use at work and it is fine. I guess I will be using the work computer, maybe during lunch break, to check my shutter speeds.  (:

Donyet

Feb 09, 2011, 08:16 PM #63 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
I have been busy the last few months and haven't had a chance to get back to the camera. I bought a new computer, so hopefully I will get a chance to try your shutter tester soon.
 
and thanks again for your help.
 
Alex

Ron_g

Feb 09, 2011, 09:50 PM #64 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
Have fun with it.Ron G

Paul Ron

Feb 10, 2011, 02:43 PM #65 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
WOW, Nice write up guys.

Mareklew

Feb 18, 2011, 06:13 PM #66 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
hope to hear the end of it ;)
Marek

Donyet

Jul 20, 2011, 12:26 AM #67 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
Well, the saga continues unfortunately. I finally got back to the camera and I tried putting a roll of film through it and have found that the winding mechanism is not working. When you wind the crank, the winder inside the camera seems to be dis-enga

Mareklew

Jul 24, 2011, 12:04 PM #68 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
I will follow the new topic, here:
https://kyp.hauslendale.com/classics/forum/messages/2/22192.html?1311278539
 
this old one left to the history ;)

Brownman

Feb 15, 2012, 06:59 PM #69 Last Edit: Sep 20, 2024, 01:00 AM by smf_adm
I know this is a very old thread but i want to put it here that this is so far the most comprehensive, detailed and least intimidating DIY guidance i have seen on camera repair. The flow of question and answer is very easy to follow as each one logicall