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JVC GY-HM 600/700/800 Series Camera Systems
GY-HM6xx, HM7xx and HM8xx ProHD camcorders & decks.


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Old September 15th, 2009, 04:50 PM   #1
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Defect white Pixel

The first 10 hours no problems, after 41 hours of operation, great white hot spots in the middle of the pictures (not only 1 Pixel - really more are defect!). And from JVC Germany is nothing to hear or something helpful, because I use the Cam every day for some image-shots.
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Old September 16th, 2009, 05:21 AM   #2
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Eric,

I believe you have the 700? Do you have this problem with the 700?
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Old September 16th, 2009, 09:30 AM   #3
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Hi Eric

sad to hear that
what 's wrong with the HM 700 me first, you now, who is next ?

Damn it

Mike
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Old September 16th, 2009, 09:53 AM   #4
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I got the HM 700 since the beginning of July,
JVC Germany no answer,
the great hotpixel the last five hours.
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Old September 16th, 2009, 02:18 PM   #5
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I think JVC makes nothing - and I need the HM700 every day for some shots.
In one month I am on a music-festival-shot and I really need the Cam.

Yesterday I send the German sales-manager an email, because in the system-menu
I see the button for hot-pixel-detection but this can`t be changed.
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Old September 16th, 2009, 04:07 PM   #6
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Now I searched in the Cam to find the advanced menu and then the right way to activate the dead pixel detection, then this function is really hidden in the normal menu and after that you can search the dead pixel.

JVC isn`t really helpfull, I search my way to solve the problem.
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Old September 17th, 2009, 02:12 AM   #7
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Today JVC Germany called me on mobile-phone,
I told him, that I found the solution to mark
the wrong pixels.

Due to the CAs, it's the optic.

Due to the green light, JVC say it's not the
CCD, it is the optic/lens. My opinion that it can
be solved with a greater hood to shade the sun is
really right.
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Old September 17th, 2009, 02:53 AM   #8
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Eric,

how do you get access in the advanced menu? I have a HM700 running 50 hours with no problems yet and not looking forward for the problems you have, but i might.
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Old September 17th, 2009, 03:50 AM   #9
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Hi Eric glad than you fix it

how do you get access in the advanced menu?

Hi thomas

1. While pressing DISPLAY button, turn on the camera power.
2. While pressing on FOCUS ASSIST button located on the side of the camera, press the MENU button to display ADVANCED MENU.

Simple but if you don't know not easy to find it

for the HM 700

JVC Professional Customer Support - Firmware Upgrade

Mike
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Old September 17th, 2009, 04:20 PM   #10
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Bad pixel, bad pixel!

Eric, bad pixels are a fact of life with JVC cams (they also affect other cams as well, but not as much as the high end JVC cams).

I purchased two new 700's and both had dead pixels right out of the box (one had 1 dead pixel, the other a clump of three or four). JVC Japan says it's probably because the cams were imported via air carrier (gamma rays can cause bad pixels, so if you do a lot of air travel with your cam, expect dead pixels).

While it's great that JVC furnished us with a way to mask dead pixels, it's not to be taken lightly. Every dead pixel equals a loss (however slight) in resolution. If you have a clump of dead pixels, mask them, then do an extreme closeup on an actor, and that masked pixel area winds up on an eyelash, that eyelash is no longer going to be as crisp as the other lashes in the shot.

My personal method to test for and mask dead pixels is to warm up the camera for about an hour at 0 gain, then run it at 18dB for about 15 minutes, then punch it back to 0 gain and do the masking. Sometimes a cam that shows no dead pixels at 0 will show dead pixels at 0 gain after being boosted to 18dB for awhile.

Luckily, I have never had a stuck pixel, as those are very hard to fix.
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Old September 18th, 2009, 01:16 AM   #11
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I found the pixel during the use, during a shot 2 hours,
when I use the Focus-Tool with coloured edges,
at first highlighted dead or white pixel
you see it really better by using the focus tool,
so the cam this is a edge in your video picture.
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Old September 19th, 2009, 05:05 AM   #12
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Thanks Mike.
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