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andy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, December 22, 2004 - 08:17 pm: | 
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Anyone have any advice on how to recalibrate the meters in the Pentax ME Super models? I've taken a look under the hood of one of these before and don't just want to start tinkering without an idea of where to look and what to do. Thanks! |
Henry
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 23, 2004 - 11:12 am: |
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There is a couple variable resistors on the flex-board over the prism. I think the one for the meter is the rear one. Usually these don't need to be readjusted...you sure you need to?
Henry |
andy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 23, 2004 - 12:29 pm: |
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Henry,
I am reasonably certain that I do, as the camera has a tendency to call for 4 second exposures and, regardless of film speed, the meter never wants less than 1/125th. If you have any other ideas, please advise.
Andy. |
Henry
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 23, 2004 - 01:38 pm: |
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You could simply have dirty resistor tracks. Or you may have a break in the circuit where not all of the voltages are being added.
If the camera has never been opened...at least not by a screwdriver happy tinkerer...then I REALLY doubt you have a simple adjustment problem. Do this. Take a reading of a consistently lit thing...like a cloudless sky. Now cycle the aperture track about 50 times and the ASA track about fifty times. Now take the reading of the same spot in the sky. Do the readings match? If the reading has changed you definitely have dirty resistors.
Henry |
andy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 23, 2004 - 02:09 pm: |
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thanks, henry, i guess i'll just have to open it up and see what kind of internal gunk invasion i have on my hands.
to get on your nerves a little bit (you seems pretty good about quick responses) per an earlier question that hasn't gotten a response yet--when you take the mirror box out of an older canon (ftb/tx era) do you have to retension the curtains after reinstalling? got my FTb to wind & fire but the second curtain no longer follows.
thanks,
Andy. |
Henry
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 23, 2004 - 05:17 pm: |
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Unless your second curtain has zero tension, tension is not the problem. Check the clockwork. Maybe a catch is stuck or a spring installed wrong.
A good work practise is to check functionality after installing each part during a reassembly. When I follow this things go smooth...ALWAYS. But when I've short circuited it some times I wind up spending tons of time re-disassembling.
Check your catches...
Henry |
