WG4600 slight flagging/rolling

toolguy

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Anyone know why my WG4600 has a slight horizontal flag, or roll. It is so slight, a pic or vid would not even pick it up. Just wondering if its normal or not, this is only the second arcade I've owned, my first has an XY monitor. I cannot adjust it out either.

This is what I did when I rebuilt it:

Every CAP replaced, even the large 1600V.
New HOT transistor and the transistor on the opposite side. B+ voltage is where it should be too.
New .156 terminals, coming from the board, going to the male terminals on the one daughter board.
Fixed any grounds whose wires were brittle at either ends.
Checked the big red yoke wire, going to the flyback for looseness.
Reflowed solder to every single solder joint on all three boards.
I did the humm bar mod, where you place sheet metal over the transformers, found on Roberts site. This did nothing...

I searched the site and found to adjust the metal silver square, with a slot for a reg screw driver, found on the vert/hor daughter card. I just did this and all it did was distort the vertical it seemed on the right side.

I also put all new CAPS on the main board PCB's and the game has all its proper yellow ground straps.

So now I have no idea, unless I'm being too picky here, the pic looks great, nice vibrant colors. The monitor was degaussed and rejuvinated too.

Any ideas what could cause a slight roll/flag?

Thanks,
 
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I have seen some WG K7000 serires have a rolling or jitter/shake to the entire picture if the monitor frame wasn't getting a good earth ground. Hooked a good ground to the frame and the pic stabilzed completely. Worth checking IMO.
 
OK thanks The Count! I'll check my grounds real good, one at a time.
 
Cehcked all my grounds and then added a few temporary grounds with alligator clips. No change, but it was a good suggestion.

I then again covered the power suppies and fuses with metal like the humm bar mod and no change.

Any other ideas?

Could it be my horz width coil?

Its really seen better days and the ceramic is gone all the way down to its winding, cracked off. I would not suspect this but the wave is horizontal.
 
H hold causes this issue.

The "silver box with the slot" is L351 and it is the coarse adjustment for sync. The H hold is the fine adjustment for sync.

Center the H hold, then adjust L351 until you get the best picture possible. Onece you have the best pic possible fine tune it with the H hold.
 
H hold causes this issue.

The "silver box with the slot" is L351 and it is the coarse adjustment for sync. The H hold is the fine adjustment for sync.

Center the H hold, then adjust L351 until you get the best picture possible. Onece you have the best pic possible fine tune it with the H hold.

Well I did this and it's still the same.

Followed your instructions exactly and the end result was just the sceen moving up or down (vertically I might add) when I turned the H hold, after adjusting the silver box of course.
 
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and adjusting the V hold to stop the up & down did what?

Never tried V hold that day, just what you suggested.

I can try it tonight though and report back.

Thanks for your help!
 
sometimes you have to work them both to get everything perfect

Adjusted the V hold and it moved the pic verticle. I then tried to adjust both V and H and no change. The flagging is still there and never lessons up. It is there as soon as the machine is turned on and never increases.

I wonder what the heck is the issue here?
 
And you tried a different gameboard?

No, its the only one I have.

However, the game did go to a repair place which replaced my old P board, with the current after saying mine had issues. I do not believe it needed to be replaced as it was just taken there for a convergence issue (the guy just adjusted the convergence rings) but I got the never style P board out of the deal for cheap. The older P board was the kind where you should install the black pot backwards for ease of tuning.

So, I've had two different P boards before, but the monitor has always had this flag even with the other P board.
 
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