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Old Jun 9, 2002, 1:19 AM   #1
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Default Nikon 990 freezing

I have my 990 in a underwater housing.
Every once in awhile it will lock up and I
have to surface and take out the batteries to restore it.
I'm thinking its a heat related problem
but I'm not sure.
It's not happening outside the housing.
Is anyone else having a problem like this?

Marc
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Old Jun 9, 2002, 8:02 AM   #2
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Marc

It could also be batteries related. Try another(brand new) set, because sometime even 1 cell could go out of whack and the battery/set drops below the nominal voltage allowable for the 990 and the camera would just froze.

I have taken my 990 on very hot sandy beach with no problem (although don't abuse it just like any other camera)
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Old Jun 9, 2002, 3:44 PM   #3
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That's a interesting thought, how would I
measure for that?
Would I charge the batteries first and check using a volt meter ?
Or try discharing and measuring the voltage ?
I did make my own battery pack from
8-1800 mah batteries.
Pluged it into the ac-dc power plug on the front of the camera.
I had no problem with this set up.
Maybe because they were new batteries.

Understand one thing about the camera housing.
When the batteries discharge they produce a lot of heat.
The housing is made of PVC and will hold
heat like a thermos bottle.
Their's really no place for the camera's heat to dissipate too.
Thats why I made the external power supply.
The batteries are still in the housing but not inside the camera.
I thought it would keep the camera cooler.
It does the job nicely, but maybe your right?

Marc
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Old Jun 10, 2002, 12:32 AM   #4
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Marc

I don't think it's the heat since you can try with your custom battery pack on the beach/boat after the camera has been exposed to the sun heat.

If a cell dropout, it usually happen under load (ie zooming) or taking picture or something so if you measure them outside the 990 without loading it, you'll usually see good results; However, if a cell is really bad then you should see its voltage slighly less than the good ones...
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