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I have a humphrey lens analyzer model 350 and i am looking for a service manual. The Lens clamp is not locking.

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Posted on Jan 02, 2017

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How do I hook my external laser printer to my humphrey 740?


In the user manual they list some compatible printers that have a 25 pin parallel connector. We use Lexmark Optra E312L with good results. Once you hook it up, you have to go into one of the setup menus to port it over. The user guide tells the procedure.

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Why does my zeiss humphrey visual field machine keep shutting down?


Sounds like a heat, thermal issue. You may have a non- functioning cooling fan somewhere inside. There are several of them so don't be fooled if you hear one of them running. Same issue happens with CPUs on PC computers. Will suddenly shut off if too hot.

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Zeiss humphrey system startup state 19


I believe "state 19" is a weak main illumination bulb. Not sure if it's the same on your 740, but that's what the problem was with our 750i. Even though the bulb appears to be working, they dim over time and won't pass the start up calibration checks. On ours, there is a round access panel on top of the unit to service this bulb. Just be careful removing the bulb and don't bump any of the clear optical wheels. Part # 2660021106082 (for 750i. not sure about 740) Call Zeiss to confirm. Realize this is an old post so info is for future readers.

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Service manual


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Hello, I'm from Indonesia introduce doctoral pocket digital camera. to the problem of error 45 on kodak V610, V570, V705 caused by a focus motor carry. I often deal with the problem that I have about 430...


Error 45 usually shows up when there is a problem with the camera's lens. The camera locks up to prevent further damage. On some Kodak models, there is a notation in the user's manual that only says that the camera needs to go in for service.

So, what can you do? Try taking the camera and tapping the edge nearest the lens hard against your hand several times. This can dislodge any grit that might be jamming the lens. Turn on and test.

Clean with canned air. Using short bursts about 2 inches away and at an angle so as to blow any debris out instead of deeper in. Go around the lens turret and then test.

(At your own risk) set the camera on a tabletop and look at the lens to see if it is out of alignment. If it looks off center, push the lens toward the greater gap until you hear a click. Turn on and test.

If none of these work, then your camera needs to be physically examined by a repair technician.

hope this helps.

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Nikon N55 camera locks up


The F-- indicates that the camera is not communicating with the lens. There are several reasons for this.

The lens is not capable of communicating. If it's an old lens, without the electrical contacts, then you'll have to set the camera to Manual (M) mode in order to use this lens.

If the lens has an aperture ring, set it to the smallest aperture (biggest F/number) and lock it (if it has a lock).

If the lens has no aperture ring, then the contacts may be dirty. Remove lens, clean contacts on back of the lens and in the mount on the body, then reattach lens.

If that doesn't do it, then either the camera and/or the lens may require service.

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Hi, I have a Minolta 7D. I bought an M42 screw lens adapter, an almost flat plate, however the camera kept saying "no lens detected". Then somewher on the web I found a solution: On the menue screen I found "Shutter Lock" with the choice On or Off. By switching to off I can now use 42mm lenses. Though there is no AF and the metering works with setting the aperture manually. Good luck and maybe you find the Sony to be the same.
Roy Smith

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