EEVblog #454 - JVC Camcorder Teardown

Teardown Tuesday
Inside a JVC comsumer camcorder
What design and systems engineering awaits?

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[snarkyboojum]

Love the insight into the engineering and design process Dave gets into these teardown videos. Awesome.

[PooperScooperTrooper]

Love this fellas enthusiasm! Wish I had a fraction of his knowledge in Electronics!

[MudRFunR]

I have 2 mid grade JVC's. They have been through so many mud bogs in open trucks. So many times, I thought they must be ruined, all covered in thick mud. Now years later, one finally quit. It got mud in the zooming mechanism. The second one still works but recently got too close to my hand grinder and burnt little pits in the lens. Remarkably, it still records clearly except when the sun is facing the lens. JVC's are awesome! Nice to see the inside, thanks.

[harrisonhealey]

Wow that was amazing, thats the longest speech ive heard explaining why the infared sensor was positioned there, you're fantastic at teardowns :D

[FXGreggan.]

It's always fun to get some recognition for all the work consumers never will understand,
on behalf of all engineers - cheers! :)

[mikeselectricstuff]

A reason for analogue video to the screen is to share hardware with analogue TV-out

[SproutyPottedPlant]

The lens was always a mystery to me, thanks for tearing it down and showing me it is a lot simpler than it looks, I guess it is quite realiable too!

[Shawn_White]

36:10 you might want to disable auto-focus on your main camera if it supports it. I noticed that it was trying to compensate for your adjustments to the camera lens assembly during that experiment.

[superdau]

Usually year and month (or week) of production. AFAIK they are not part of the original mold but moveable inserts that can be changed around so the date can be changed without having to produce a new mold.

[rangehold]

Out of curiosity... I don't think you will be putting it together again, so what do you do with the remains? Bin?

[PhattyMo]

13:07 Notice that they've punched holes in the (I'm assuming) hot/signal trace of one of the mic's! I assume this was a mono model, then? I assume they must use the same microphone assembly in more than one model? Why not just remove (omit) the unused mic in the first place? Save a whole 20 cents each!
Curious.

[MCRIPPPerutube]

what are those little numbered dial looking things that are always cast into plastic parts?

[UnreasonableSteve]

They're called "Date code wheels" generally, you can google them for more information.

[bitrot]

Perhaps the video DAC is just for the "COMPONENT" connector, and doesn't sit between the main ASIC and the Sony LCD driver...

[PhoneyGeek]

Sounds like Dave was getting a little nostalgic about his old job! Old habits die hard and all that!

[Razor]

If you get a chance, save the IR filter, they are pretty useful and are hard to get for cheap (great for building your own IR cut filter, or for other stuff)

[UnreasonableSteve]

They are manufacturing date/machine/line (depending on the dial) indicators.

[TheSkogemann]

The heat sink on and around the CMOS is not for "cooling", but for minimizing infrared interference.

[isashach]

Although I'm sure that JVC sells lots of models, I'm guessing they're all very similar - the differences may be in the external housing + a few extra buttons here and there and some features unlocked on the processor. The TV industry does the same thing to obfuscate their TV's (especially Samsung, they literally have a model number per retailer) so that if one model number starts getting bad reviews or bad press, the rest of their business won't be affected as much I guess.

[dalriada]

It also had component out. The socket was immediately to the right of the hdmi connector.