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Message |
    
Alex7sii
Tinkerer
Username: Alex7sii
Post Number: 1
Registered: 02-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, February 10, 2011 - 08:30 am: | 
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Hi!
I've recently got hold of a Hi-Matic 7SII, which is in excellent condition, except that the meter does not work. I've already replaced the mercury battery with a Wein-Cell and reatteched the cable to the battery tray since it has been totally corroded.
Unfortunately, the meter still does not work. I searched the forum here (among others) and noticed one interesting thing: from what I understand, the needle is supposed to be at the top without a battery or if the CdS cell is broken. In my case, however, it stays at the bottom and only moves a little when I press the release button.
Do you have any advice for me, what would be advisable to check next?
Best regards,
alex |
Juliard1
Tinkerer
Username: Juliard1
Post Number: 23
Registered: 04-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, February 14, 2011 - 03:16 pm: |
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Hi Alex, I think that the CdS meter has zip to do with the battery and powers the needle on its own photon generated micro voltage. Just check that the CdS is clean, all the wires are properly soldered and the needle swings freely. Do not use a multi meter to check the opposing field coils you will blow them. If that does not work, find a new unit. I may have some here somewhere .... |
Monopix
Tinkerer
Username: Monopix
Post Number: 192
Registered: 11-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 15, 2011 - 01:49 am: |
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Cds cells NEED battery power. You're confusing it with a selenium cell. |
Milosdevino
Tinkerer
Username: Milosdevino
Post Number: 15
Registered: 03-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, March 09, 2011 - 01:11 am: |
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I too have exactly the same problem, and have done the same as alex re batteries etc. Does anyone have any answers? |
Monopix
Tinkerer
Username: Monopix
Post Number: 201
Registered: 11-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, March 09, 2011 - 03:44 am: |
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You could be looking at a dead Cds cell. They do fail sometimes. |
Milosdevino
Tinkerer
Username: Milosdevino
Post Number: 16
Registered: 03-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 21, 2011 - 03:25 am: |
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Found the problem/solution after delving much further into the camera's innards than I had intended. In behind the lens board is a small switch which is activated once the aperture is set to auto. You have to remove the lens board to get to it. Mine looked OK to a cursory glance, but closer examination revealed that the two blades of the switch were not in contact when they were supposed to be. So, no power to the meter. I bent the leaves a ittle to make them contact when required and it now goes just llike a bought one. Next step is removing the front lens elements so I can tighten up the droopy lens.
That is after I get the beach out of the insides. |
Thereplicant07
Tinkerer
Username: Thereplicant07
Post Number: 4
Registered: 03-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 27, 2011 - 09:47 am: |
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Milosdevino:
I have a meter problem with my Hi-Matic 7s. Almost the same camera but I see no switches underneath the lens board.
Any details where this switch is so I can check mine?
Thanks. |
Milosdevino
Tinkerer
Username: Milosdevino
Post Number: 17
Registered: 03-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 28, 2011 - 03:33 am: |
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replicant007,
let me say from the start that I know nothing about the Hi matic 7s.
Having said that, assuming that they are similar, this is what I did.
1)Remove the top and bottom covers.
2)Remove the leatherette covering from both sides of the front of the camera.
You will now find four screws holding the whole lens/shutter/self timer/meter sub assembly onto the main body of the camera.
3)Remove these four screws and the sub assembly should be able to be removed from the body. There will stil be a couple of wires attached, but you don't need to disconnect these.
4)With the camera lying on it's back, lift up the board and place it lens down next to the camera.
Look at the board and the switch is located at 10 o'clock. It comprises two slivers of metal with a wire soldered to each one. The slivers are pushed together by a prong when the shutter is set to auto. On my one, the slivers didn't touch, so no power to the meter. I used a multi meter attached to either side of the switch to test for continuity. Careful though, when I first tested, I pushed the switch closed by applying too much pressure and so got a false positive.
I should have taken some photos but my digital camera had run out of battery.
I still have to try and fix the wobbly lens, so might try to take some pics if I'm in there again.
Hope this helped, let me know how you get on.
Regards |
Thereplicant07
Tinkerer
Username: Thereplicant07
Post Number: 5
Registered: 03-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 28, 2011 - 10:39 am: |
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Thanks for the take-down, Milosdevino.
I took the lens board off my 7s about a week ago and took a few pictures as I went. As you can see, I don't see a switch so the 7s and 7sII may be slightly different.
http://www.flickr.com/photos/thereplicant07/5567940081/ |
Alex7sii
Tinkerer
Username: Alex7sii
Post Number: 2
Registered: 02-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 04, 2011 - 12:59 pm: |
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Thanks, Milosdevino for posting the solution to your problem. I hope I'll have some time to disassemble mine in the next few days and I will report my progress.
Regards |
Alex7sii
Tinkerer
Username: Alex7sii
Post Number: 3
Registered: 02-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 02, 2011 - 01:57 pm: |
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Indeed, my 7sii had exactly the same issue with the switch of the meter. Thanks to your detailed description I could easily fix mine.
Greets! |
Milosdevino
Tinkerer
Username: Milosdevino
Post Number: 19
Registered: 03-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, June 06, 2011 - 06:25 am: |
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Glad to be of service |
