20 Most Recent Zeiss Humphrey 740 Visual Field Analyzer Questions & Answers

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.

The trouble is with the CPU. It needs to be replaced

The two most common problems when trying to find a blind spot are: A.) Forgetting to patch the eye, and B.) Choosing the correct eye in the machine itself.

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.

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.

Yes it affect all tje instrument calibration when it is turn on, and when you have patient test the result is afected because the patien has light for the bavk and he is not able to see all the diferents type of lights

You sjould press the patient button and the same time turn it the instrument on keep in button press until you see in tje display the calibration message of the touchscreen

erro 99

is the cooling fan turning?

Did you move the brighness control. It is on the right side of the equipment. If not, it could be the video board inside of the equipment

Call a repair tech from Zeiss.

This is a brand name, not a specific device and model. That said, here is a page describing mode switch in the setup screen using the touch screen for a specific device. I assume a touch screen would have an icon for turning a device off. Zeiss HUMPHREY 720i User Manual System Setup

The battery is soldered to the CPU. People from Zeiss Germany said that it needs to replace all the CPU. Now a days there is no longer spare parts for that instrument. I recommen you just change the day and time each time you turn it on

Unfortunatly you should contact Zeiss representative for load again the completecomplete Visucam programprogram.

This is very funny. I was just looking to find a similar solution for my laboval. Haven't measured it yet, but it keeps blowing the light bulbs. Do you run it at 110 or 220V?

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Technical Manual and other suggestions. Professional machines really need professional service as the repair is very specialized, and the dangers of using incorrectly sterilized tools injurious to health.

T echnical Manual

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Watch out for These 7 Common Autoclave Problems

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