picture stuttering again (AWSD / Egret II)

[Oliversum]

Yeah, so after last time when I found a solution in my "picture-stuttering" problem, being caused by a unplugged composite sync (Atomiswave SD Cab converted to Egret II)
I've got another slightly similar problem.

Got a MV-1FZ board some days ago and tested some games (Puzzle Bobble, Metal Slug, Garou etc.) and I discovered, that the picture stutters sometimes again.
This time it's like only a single time in between 10 seconds, but this already gets on my nerves.
The picture shifts a bit up or down (some millimeters) and then back to the original position. It happens fast, so it seems like it hiccups/stutters a bit.

V-sync is set, composite sync is plugged in, and also happens on my 2-Slot MVS board.


Any solutions? Could it be the Jamma Loom?

[Oliversum]

it corrects itself

just now it started to stutter several times again, like with the disconnected composite sync (D1, D2)

[Oliversum]

Don't have a camera now (it's used by each family member), but pics would be impossible, because it's only some milliseconds from
shifting (up or down some millimeters) until correcting back.

[Oliversum]

Do you have a picture that shows where these pots are?

I just don't have "good" access to the chassis, because it's a bit too high when I access it from the back of the cab.
Or is it one of these black pots (not green plastic pots)? They're good to reach for me.

[Oliversum]

Can I remove two of the ground wires (they're under screws), because they wouldn't let me move the chassis.
And where do I have to be cautious not to touch the chassis?

And I thought I wouldn't have to bother with the chassis when I got my cab, but now there is now other way, am I right? ****

[Oliversum]

This animation should describe my problem:
(it's occuring frequently)

[Oliversum]

The b+ should be no problem for me to change, only have to get croc-clips for my multimeter.

If it's a dry solder joint, how the **** are you going to discover which it is?

[Oliversum]

Just changed the pots a bit on the front near the degauss-button and it disappeared.
I think it depends on the configuration of them.
But I will also get a look on my chassis in the future, adjusting my picture a bit (its rotation is a bit to the left)
and also the b+ pots if I'm man enough.

Also, thanks for your great help, giving me a little overview over the chassis.

[Oliversum]

I double checked the v.hold pot before.

It disappeared after I changed the vertical size or position of the picture.

[HyperDuel]

I had the problem before and I fixed it by making sure the cable from the chassis to the geometry knobs is not moving in the cab. I put on some tape on the wires next to the PCB compartment and the problem was solved.