Pac-man original newbie repair

[BadMonkey]

So I purchased an all original pac-man from a guy who claimed he upgraded the monitor to lcd but original monitor came with the pac. The upgrade was a dell slapped in with a conversion board held in with tape and the old mounts wedged underneath. My plan is to 'shotgun' the k4600 but in the meantime i need to get the wave and tick out of the dell that is currently sitting in the machine. Naturally the coin mechs he claimed worked do not work and there is some cabinet work needed to the original paint. Cab is solid and all parts are there but its rough. So, any thoughts on the lcd dell wave issue? The menu for the monitor does not wave like the gameplay and the speaker also puts out distortion when the volume is raised. Cap the board? Transistor issue? Could power supply cause this?

[VertexGuy]

my guess is the coin switches are not hooked up or getting no voltage.
the wave in the monitor can be caused by faulty fuses, bad grounding, shitty edge connector or bad power brick.

[BadMonkey]

Thank you. I did check the fuses already. I am going to go through the power to make sure the supply is correct. I tried the usual 're-seating' of connectors and such. It seems to get worse the longer it is on. I will continue tomorrow after I take in a few more youtube video's. I want to get caught up on the journey restoration also.

Thanks for the input. I will update as I trial and error for this pac-man problem. I am having a hard time deciding if I want to try a total restore or leave it original and beat up.

[VertexGuy]

dude it takes no videos to know a few things..

Even though those fuses look good, and the contacts look good.. does not mean they are good.
two coming in from the power chord ,  4 over on the right.

[BadMonkey]

Initial voltage tests look good. Fuses good. Cleaned them hoping that was the issue but no luck. I am off to get replacement filter caps. Hope this is all it is. Will keep updating.

[John's Arcade]

Monitor wave (hum bar) can be caused by a bad fuse block or edge connector as Vertex said.

You can read this:

http://www.twobits.com/Humbar/

However, I don't recommend buying anything from them. Go to Bob Roberts instead.

[BadMonkey]

Thanks. Ordering the newer block. Been trying to fix all these broke machines i've been picking up. Got the buck hunter running with a cap kit and flyback. Just picked a tron that has a yellow screen. The power supply has corrosion from leaky battery. Original dk with white screen also. Bob roberts will need a big box for my order.

[BadMonkey]

Replaced the fuse block and allthe fuses. Still wavy screen. Going to try caps next. Will update.
I'm off to work on dk. Has a white screen, reading 3.8, 4.3, 4.4 volts on test points.

[P-feif]

Yes having the same problem with my Mrs. Pacman. I did find that someone did a really bad repair the the edge of the PCB board so I ordered the repaire kit that Bob Roberts sells to fix the edge of the PCB.

http://www.therealbobroberts.net/pace.html

And the kit to fix the PCB wire harness connector and fues block.....

http://www.therealbobroberts.net/pacfuse_special.gif

I also ordered the PCB cap kit.

I hope this fixes the wave because if it doesn't then I'll be trying to t-shoot the trasformer assymblely in the bottom of the cabinet.

[BadMonkey]

So....it's been a year. I have messed with so many other cabs that pac has sat all this time. So to update; I had previously done all that was stated before. I just recently put a different pac board in and same wave across the screen. I replaced the edge connector (22/44 bob Roberts) and still the same issue.
So... I just ordered a new RFI filter from twisted and a pac pcb "Humbar repair kit" which is just 3 caps for the pcb.
I am running out of options. I am hoping this RFI filter does it. Next would be the power brick but my voltages look good coming out of it. I will update after I receive the filter.
Does anyone have any thoughts/experience with Humbar/wave outside of the normal fuse block/edge connector fix?
Thanks

[iankellogg]

have you replaced the b+ filter cap on the monitor? or any of the caps on that monitor for that matter.

[BadMonkey]

I still have an lcd monitor in the game. The original 4600 is on the side waiting to be reinstalled. The game was working with no wave when I bought the cab. Started "waving" after I got it home sometime. I thought it may be the conversion board for the lcd monitor. The monitor works well without the input (menu and such). The input from the board (game)is what is waving. I need to put a new connector to hook up the original monitor again. When I picked it up, the previous owner stated the monitor didn't work so he put some POS dell monitor in it with the conversion board. I found a used working chassis for my 4600 but it is not tested yet.

[iankellogg]

i miss read your last message, i thought you had already replaced the caps. the new PCB caps should fix it.

[BadMonkey]

It seems odd though that I am having the same problem with two different pcb's. I will change the filter then test. And then the pcb caps, then test. I will post the results.

[iankellogg]

The caps are often bad and are often a problem.

The other issues that can cause the humbar are
poor grounding (bad connection to the harness and to ground)
RF filter PCB still being used. IF that board with the yellow strap is still attached to the harness. throw it out, it causes issues.