WG 4600 line issue

toolguy

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Hope someone can help me.

My Ms Pac WG 4600 is making scrolling lines. It also seems the V hold will not hold the pic. Not sure if there related but maybe. V hold POT?

Here is a pic...

I bought it like this and just did a cap kit. I did every cap but the 1600v .10uf cap. I have one, but have not installed it.

Its not a board issue as its out for repair.

While doing the cap kit, I touched each and every solder joint and especailly on the header pins.

Anyone got any suggestions as to what is causing this?

I hope its not the POTS as I went to replace them all and discovered they are obsolete. The only one that's new is the black POT.


I hope the issue can be seen from the pic. It has a scrolling green line and smaller white lines, from left to right, like reading a book.


Thanks!
 

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If you bought the capkit from Zanen Electronics, then it would have included a brand new "black level control" trimpot for the video interface board. I would also assume that you installed said trimpot and adjusted it for the correct brightness first.

Your picture looks like there is no video signal to the monitor.

Is this the original monitor in your machine or is this a replacement? If it's been replaced, does it have the correct video interface board?

http://www.ionpool.net/arcade/tech/19K4600_pinout.txt
 
Thanks Ken!

Yes, the cap kit I got did come with the black pot and I instaleld it.

The monitor did this even with the board connected. I assume that what you mean by no vid signal and I would say right, cause the boards are not there. I've adjusted the brightness every way and the lines stay and pic does not stay centered.

I'm looking at your doc now, and pretty sure my vid interface board is a P317, because the black pot is mounted to it. I'm not sure if its the original monitor though, or not...

I suppose I'll check the p205 and p204 pinouts, per your doc?
 
You did remember to connect the neck board to the video interface board, right?

-Ian

Ah ha! Well I did not at first, but when I got no picture, I realized it was connected wrong. Both have four male pins... I connected it properly and then got the pic you see.

Could I have damaged something from it not being connected properly then?
 
If you bought the capkit from Zanen Electronics, then it would have included a brand new "black level control" trimpot for the video interface board. I would also assume that you installed said trimpot and adjusted it for the correct brightness first.

Your picture looks like there is no video signal to the monitor.

Is this the original monitor in your machine or is this a replacement? If it's been replaced, does it have the correct video interface board?

http://www.ionpool.net/arcade/tech/19K4600_pinout.txt


OK Ken, my monitor does not follow your doc.

At my 205, pinout is:

1 RED
2 WHT
3 YLW
4 not used
5 not used

My 204 which is not labeled and I assume directly under labeled 205 as seen in pic, is:

1 not used
2 GRN
3 GRN

The board is labeled P317 and the monitor is an RCA 19K4606.

Here's a pic of what I see...
 

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OK Ken, my monitor does not follow your doc.

At my 205, pinout is:

1 RED
2 WHT
3 YLW
4 not used
5 not used

My 204 which is not labeled and I assume directly under labeled 205 as seen in pic, is:

1 not used
2 GRN
3 GRN

205
1 Function = Red
2 Function = Green
3 Function = Blue

204
2 Function = Sync
3 Function = Sync

Regardless of the physical wire color......Haven't looked in the manual, but it would probably show you what wire colors they used, but it's the "function" of each wire that matters.

Maybe try turning the SCREEN control down a bit on the NECKBOARD.
Personally, I wouldn't try to adjusting much of anything else until you have a working boardset in it.
 
Alright, I'll wait for the board to come back, then checkit out. Just thoguth I could fix this while it was gone, thinking it is not a board issue.

And I do have the manual, but I just don't know where to start and what to fix. I can fix anything, but knowing what to is the battle.
 
I got my board back, installed it, tuned in the monitor and the machine works perfectly now! There is no monitor issue...
 
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