Alice Averlong🏳️⚧️arg. I got a video camera at the electronics fair, and I'm gonna need to pay more than the camera costs to get the fucking manual.
that should be illegal
This is a JVC GX-J700U color video camera, from approximately 1984.
It's got "excellent picture quality", 360 lines resolution!
It's got genlock, color bars, and built in character generator.
(It's also got a mic and viewfinder, but I pulled them off for this picture)
It's got "excellent picture quality", 360 lines resolution!
It's got genlock, color bars, and built in character generator.
(It's also got a mic and viewfinder, but I pulled them off for this picture)
I don't know why it's outputting B&W. this is supposedly a color camera.
I opened it up to check for anything obviously wrong. Nope. I'd need to actually buy the service manual to have any idea how to fix this.
vxo@foone nice analog delay line taking center stage there :3
@foone there is also a small external panel for the color registration adjustments (yes! That drifts!!)
You'd shoot a registration test pattern and use the pots to adjust the size of the image sent by the red and blue tubes. Centering is automatic I believe
Oops, I forgot to add the alt text. This is a small panel with screw head pots and toggle switches, R-H, R-V, B-H, B-V, and a few toggle switches to set which channels are sent to the test out jack.
@foone my favorite is the diagonal 'this is where I go' stripe across each card
In theory, somewhere out there, someone must have module extender cards to let you test on the cards with them popped out the side
Solarbird 
@moira it mostly works too!!
eyajpng@foone Cool mix of THT and SMT, I feel like electronics only looked like this for like…six years during the 80s
Tachibana Kanade@foone Could it be a PAL/NTSC thing?
@h0m54r I don't think so, I think this is only an NTSC camera, and so is my PVM
Rue Mohr@foone failure of a 3.57MHz oscillator?
@RueNahcMohr @foone that's kinda what I'm wondering, an oscilloscope will be telling
etherknot@foone there is a colour option on the top left of the switches? 🙃
@etherknot that's for the fade: you can fade out to solid colors
@foone but did you try it?
@foone Just to get in the right general ballpark - pop the video out up on a scope, set the trigger to TV line if available, or otherwise just set the trigger to normal mode, falling edge, adjust the level until it's below 0v and mess with it till it stabilizes. Do you have a burst at the beginning of each line?
(See my highly useful pinned... shitpost.)
(See my highly useful pinned... shitpost.)
@foone ya know what, this thing has officially surprised me
EIAJ connector on a camera that also provides genlock input and BNCs? That's a first to me - I mean, it kinda makes sense, EIAJ just has composite out as does the camera itself, but I was half expecting it to have something a little fancier. I guess JVC probably also sold at least semi-pro-quality (what format?) messenger bag VTRs with the EIAJ connection to match this.
Also I'm a little sad I didn't get to say hi there :D
@foone I tried throwing a few internet searches into the void for a picture of the shading controls on this thing to see if there's an externally accessible or labeled switch for making it spit out b/w only for level setup and came back only with an old magazine and fell down a rabbit hole
I dunno why I didn't expect to ever see a big magazine ad for the Tektronix TM500 series test equipment but here we are: https://archive.org/details/radio_electronics_1983-01/page/n29/mode/2up
(I have very mixed feelings about this TM500 stuff...)
Duke Hyena@foone perhaps it's not in B/W, it's an x-ray machine... 🙂