Panasonic AG-1980P - Diagonal Lines in certain colors.

[ENunn]

i've been having this issue for a while with my 1980, where in certain colors (mostly skin tones, reds, and yellows) there's these diagonal lines and i don't know what's causing it. it used to be really bad, but swapping out my s-video cables with some good ones fixed a lot of it, but some are still there. i run my vcr through either a datavideo tbc-3000 or a panasonic dmr-es15 (depending on the tape). i can filter most of it out with some denoising in avisynth, but sometimes it'll still show up slightly. i have my vcr set to edit mode. i haven't tried norm or detail but i'm not a fan of those because of the ghosting so I avoid using them.


i had a similar issue with my now dead jvc hooked up to my es15, but that was much much worse. but i think that was caused by the cables i was using.


it doesn't show up all the time but it seems to only show up when the tape has hifi audio, and even then it doesn't show up on all hifi tapes either. is there a fix for this? could it be my caps? i don't see why, they've been recapped. i posted something about this on a discord server, and someone mentioned it looks like something called hifi leak. i don't know how to fix that.

[Sharc]

What is your capture card / digitizer?
Electromagnetic interference? Mobile phone or similar near by?
Ground loop?
Is it in the luma (Y) or chroma (U,V) channels?
Do you get the same disturbance when connecting the 1980 straight to TV via S-Video or Composite?

[ENunn]

What is your capture card / digitizer?

io-data gv-usb2

Electromagnetic interference? Mobile phone or similar near by?

nah, just my capture pc, my monitor, and my crt tv. i have nowhere else to put them.

Ground loop?

i'm not sure. i have everything hooked up to a ups.

Is it in the luma (Y) or chroma (U,V) channels?

how do i find that out?

Do you get the same disturbance when connecting the 1980 straight to TV via S-Video or Composite?

i'm not sure. it's hard to tell with a 14" screen.

[ENunn]

i think i fixed it. it was my vcr's s-video cable :/ i switched my vcr's cable with my tbc's cable and everything seems to be good. man i wish i could find some good short s-video cables

[Sharc]

i think i fixed it. it was my vcr's s-video cable :/ i switched my vcr's cable with my tbc's cable and everything seems to be good. man i wish i could find some good short s-video cables

This one (from kenable UK) is reasonable. Dont know if available in US.
https://www.amazon.de/-/en/Copper-S-Video-4-Pin-Mini-DIN-Gold-Plated-darkblue/dp/B003P...0&sr=8-13&th=1

[ENunn]

This one (from kenable UK) is reasonable. Dont know if available in US.
https://www.amazon.de/-/en/Copper-S-Video-4-Pin-Mini-DIN-Gold-Plated-darkblue/dp/B003P...0&sr=8-13&th=1

it can't ship to the us unfortunately

[johnmeyer]

It has become really hard to get quality cables. I wish I could give you a recommendation on where to get them.

I built my original home theater in the early 1990s and was able to get "premium" cables (although I avoided the stupid "Monster Cables" which provide no benefit). When I finally upgraded to HD in 2012 (I was late to that game) about 2/3 of those cables came out (I still have a laserdisc player, tape deck, and VHS player installed, so some analog cables are still used). I am holding on to those premium analog cables in case I end up getting a big tape transfer project dumped in my lap.

I have had the same experience as the OP, where a puzzling problem that didn't look like it could possible be from a bad cable ended up turning out to be exactly that problem.

[Sharc]

It has become really hard to get quality cables.

Unfortunately yes, most of these thin cables (the majority) are insufficiently screened (individual screening of Y and C wire plus overall shield is a must) and therefore cause chroma<->luma crosstalk which is sometimes worse than what one would get from composite video.
Anyway, keeping the length as short as ever possible can mitigate the problem somewhat.

[aramkolt]

Kind of depends what caps were recapped whether it could need more recapping. Certain refurbishers only change the SMT caps on the TBC card and that's it. I recap the full TBC card including through hole ones, Both front boards, Head Amp, Full Power supply, and a few other select caps that I've seen go bad on some machines.

LP/EP tapes can sometimes just be that way depending on the player that made them and it'll tend to get worse if you have the sharpness slider beyond the middle point.