OLD WG monitor problem

[chazbeenhad]

I have a SNK POW cabinet that has a very old 19" WG monitor in it. The machine is from 1988 I think.
I'm not sure what monitor model it is because the labels have fallen off.

The monitor has a pretty good picture with nice color. Its sharp enough. The problem is that the horizontal adjustment is so large I can't see a good section the game screens.

Right now I have a 1 slot Neogeo MVS system in the cabinet. It is so out in the horizontal that you cant see the last row on the right while playing magical drop. I'll attach a picture of Strikers 1945, you cant see player 2s stats at all hardly.

The one remaining label on the side lists a black cylinder as the Horizontal adjustment. I'll attach a picture with it circled. Is there a special tool to adjust this?

If I have to get a new monitor, is there a direct replacement for these older models? I'm very new to this so please fill me in on what my options are.

Thanks!

[SirPeale]

That is a K7000 series monitor.  Very nice, easy to work on, you don't want to replace it.

Besides, if everyone just went around replacing monitors every time one had a minor issue there wouldn't be many of them around!  They don't make any more!

The thing you're pointing to is the width coil.  It really won't help in this instance.

Bob Roberts sells a "width kit" for this monitor that contains a few different caps to help adjust width.  Unfortunately there isn't a pot to adjust it on this monitor.

[chazbeenhad]

Thank you. It is a nice monitor and I like it. However I have no confidence to install the width cap kit.

Also it makes a crackling sound when it is cold. The noise goes to a very light crackle every few seconds once the tube is warmed up.

I think i may just need to replace it.

I was thinking of taking an NEC svga monitor out of its case and mounting it in the cabinet. I did that for my MAME cab and its very nice. Then I can use one of these:
http://www.ambery.com/rgbcgatovgac.html
Anyone know if they are any good?

I would much prefer to buy a new replacement monitor. I have no idea of what types of monitors work with arcade cabinets. Does WG make a replacement? What are other brands and models I can look at to consider as a replacement?

[sarge]

You can try adjusting your width coil with a hex key found in a kit like one of these:

http://www.happcontrols.com/tools/92019600.htm

[chazbeenhad]

Thanks Sarge. I will order that.

I've contacted Bob Roberts and ordered the width kit from him. I'll give it a go and try my best.
I look at it this way: If I break it I was going to buy a new monitor anyway. If it works, well then I save myself around $300.

[Kevin Mullins]

And an SVGA monitor would not work in that machine. 

[chazbeenhad]

And an SVGA monitor would not work in that machine. 

It would work if I used this! Or so they say.


http://www.ambery.com/rgbcgatovgac.html

[chazbeenhad]

OK, I played with the "width kit" and although I could not get it as tight as I wanted, the width is usable now. I still have the 2 caps I wound up using on the test wires I put in there to play with different caps and not have to take the monitor out over and over again.

Somehow, and I dont know if I did it and didnt realize it or if it was like this, but the contrast knob at the end of the board doesnt work. I looked very close at it and it seems one of the legs is cracked on its way up to the knob.

Can I find replacelent adjustment knobs to replace the cracked one? Anyone know where or who might have this?

Also when I used a screwdriver on the monitor to discharge it. I got nothing, no spark no noise, nothing at all. I did it after each and ever time I had it on and every time, nothing.
I used a screw driver with a wire taped to it and an aligator clip on the chasis. I checked connection with my meter and it was good. Is it normal for some monitors to give no noise or spark?

[Kevin Mullins]

OK, I played with the "width kit" and although I could not get it as tight as I wanted, the width is usable now. I still have the 2 caps I wound up using on the test wires I put in there to play with different caps and not have to take the monitor out over and over again.

Did you try adjusting the width coil any ?

Can I find replacelent adjustment knobs to replace the cracked one? Anyone know where or who might have this?

Should be a 10K potentiometer. Bob has those too.... but can get them at many places like Mouser also. Just match the 10K and the "Type" top yours. (should be a Type C)
http://www.therealbobroberts.net/pots.html

Is it normal for some monitors to give no noise or spark?

Yes, most often there will be not much of anything..... but it's that ONE time there is and you'll have a whole new respect for going through the proper procedures.
 
And remember that it's the TUBE that holds the charge, not the anode wire. So make it a habit to re-discharge the TUBE before putting an anode wire back on.

[chazbeenhad]

I got the tools to adjust that pot, but it doesn't turn at all.

Thanks for that link, I'll match up the style, but how am I sure of the value of the pot?

Here is a list of what I got with the width kit:
F104K 250V
F104JK 250V (Heavier)
F224K 250V
F224K 630V
F334K 250V
F.47K 250V (F474K)
F.47JK 250V (Heavier)
F474K 630V

I wound up using 2 together F474JK 250 and F474K 630.
The origional says 334JS 200 on it.

Now I have no idea what the value mean. I just kept trying until it looked to fit the screen better.
Looking at the caps provided in the kit is there maybe a better combination to try?
I tried a whole bunch of combinations but the screen is a little too wide.