Author Topic: WELLS GARDNER 19K4906 and Ultimarc Video Amp (Read 5073 times)

Chunce DeLeone · « **on:** September 19, 2009, 04:41:28 pm »

I have a WELLS GARDNER 19K4906 and Ultimarc Video Amp and want to know how to hook them up regarding the Sink, I hooked up RGB and Gr, and then used the neg H sink. I read on Any's site that on some monitors you have to split the sink. So my question is how should I hook it up, twist H and V sink together and use it, or separate the sinks and Neg or Pos. Curently i have the Neg H sink hooked up and the screen is scrolling crazy and i am uable to get it controled with V and h hold.

SirPeale · « **Reply #1 on:** September 19, 2009, 07:56:52 pm »

Have you tried moving the sync wire from one pin to the others to see if it changes?

Which pin did you try? The end? Try the one next to it.

Thenasty · « **Reply #2 on:** September 19, 2009, 11:45:47 pm »

by Default, the Video AMP is already COMPOSITE, so no need to TWIST h/v Sync (just use one wire).

If you need to separate the SYNC, then you need to CUT OUT or SPLICE the C-moon shape on the AMP.

WG 19k4906 is a COMPOSITE SYNC, so you just need to wire the R G B GND SYNC. Thats 5 wires.
Maybe some 19k4906 are SEPARATE SYNC, so you just need to try the DEFAULT first, then move on to cutting the C-moon shape on the AMP to get separate SYNC (you need 6 wires).

Kevin Mullins · « **Reply #3 on:** September 20, 2009, 12:03:24 pm »

Try poking a jumper wire in the chassis connector from Neg H Sync over to the Neg V Sync.

Chunce DeLeone · « **Reply #4 on:** September 21, 2009, 01:40:32 pm »

Thanks and i will try some of those suggestions: Here are some pix to show whats going on.

Chunce DeLeone · « **Reply #5 on:** September 21, 2009, 01:53:55 pm »

I tried looping the neg H & V sync to the chasis, and adding the pos H sync to the video amp and am having the same problems.

SirPeale · « **Reply #6 on:** September 21, 2009, 03:54:23 pm »

For starters: it looks like your ground is going to the wrong pin, assuming you're using the black wire as your ground. Move it to the polar opposite of what it is now.

Kevin Mullins · « **Reply #7 on:** September 21, 2009, 04:37:15 pm »

Quote from: SirPeale on September 21, 2009, 03:54:23 pm

assuming you're using the black wire as your ground.

That threw me off at first too.
But he does have a SYNC line form the amp going to ground.

Here..... cam across these pics on the net, see if they help any.
(ignore the wire coloring though)

Chunce DeLeone · « **Reply #8 on:** September 21, 2009, 06:13:49 pm »

I got all that wiring going on but still having hroizontal scrolling, sometimes slow sometimes fast. FYI i got this monitor from someone on here and saw it working perfectly in an afterburner cab just --BINGO! Either that, or I was attempting to say "before" but it was too many letters to type-- i bought it. I am 99 sure its not the monitor.

Kevin Mullins · « **Reply #9 on:** September 21, 2009, 06:37:26 pm »

Does the Horizontal Hold have ANY effect on the image ?

I'm assuming this is a MAME setup. (?)
What resolution and such are you running it at ?

Chunce DeLeone · « **Reply #10 on:** September 21, 2009, 06:43:36 pm »

I was running mamed robotron at its native rez with soft15k on it. I have a 19inch sharp that hooks up to the same pc with a jpac no problem, which is what i used to get robotron going and then i switched the monitor cable to the wells gardiner to try to fix it. I have turned every dial on that thing.

Kevin Mullins · « **Reply #11 on:** September 21, 2009, 07:02:54 pm »

Quote from: Kevin Mullins on September 21, 2009, 06:37:26 pm

Does the Horizontal Hold have ANY effect on the image ?

Gently hold the three pin (SYNC) connector to one side with a little pressure, then try adjusting the Horizontal Hold and Vertical Hold.

Check the Horizontal Hold potentiometer itself.
Check Q301, C315 and lastly IC301.

Has this 4900 been re-capped or any of the solder joints checked ?

Chunce DeLeone · « **Reply #12 on:** September 22, 2009, 08:32:33 am »

The resolution i was mostly using on this monitor was 640 480, but i have tried all sorts of other resolution that i know work on my Sharp and still the same issues.
I tried pushing on the 3 pin sync to the side and adjusting the Horizontal Hold and Vertical Hold, which both have an effect, but i still couldn't get it close to aceptable/playable. I was close a couple times where the image would almost stop scrolling, then it would speed up and go in all directions again all on its own. I am going to try and hook up the video amp to another monitor to prove that out.

To my knowledge this monitor has not been capped or solder joint tested, I just know that i saw it working perfectly on an afterburner cab when i bought it.

Quote

Check the Horizontal Hold potentiometer itself.
Check Q301, C315 and lastly IC301.

How do I do this? I have a multimeter, am I simply looking for connectivity through the caps or am i looking for a specific value on the meter like voltage or amperage? Also can i do this with the chasis still attached and without discharging the monitor? Please excuse my electrical ignorance.

Also I was wondering if the wires from the ISOLATION Transformer had anything to do with it. The wires are the same color, so does it matter which way they are hooked up, can they be crossed? Could any power issue be to fault with this type of problem?

Thanks for the advice and info!

SirPeale · « **Reply #13 on:** September 22, 2009, 06:42:53 pm »

Your isolation transformer is fine. It either works or it does not.

You're absolutely sure the computer is outputting the correct frequency?

Chunce DeLeone · « **Reply #14 on:** September 22, 2009, 07:07:30 pm »

Cool about the power if it works its good, i was worried because the wiring is weird and i just f't with it till it workt. Dude ...... The other day, I think i touched one of those round things on the side, and got the bejeezazballz shocked out of me. So i am wary about checking caps. Can i just put the muti meter leads right to the caps as they are without going through discharging? I don't know if the pc is putting out the right freq, i just know that when i switch to a monitor cable thats connected to a jpac and a very similar sharp 19inX??? it works perfect at 640X480 and many others. I also have soft 15k and have tried a bunch of different rezs that work on the sharp but end up scrolling all over the place. Could it be grounding related?

Noticed something today: when i pushed down with the tv tool on the Hhold pot the scrolling stopped. then started again upon release like a button. Not turning the pot just pushing down, it was like slowing down a record.........weird.

kjoel0123 · « **Reply #15 on:** September 22, 2009, 09:18:29 pm »

Touching a transistor on the side of the chassis while its on is is always a NO NO. Bad move indeed

Try doing this
- Connect RGBGS and on the 3 pin connector connect the sync wire from RGBGS to the 3 pin connector sync and do the same for the ground

Chunce DeLeone · « **Reply #16 on:** September 23, 2009, 10:55:42 am »

Wifey is going out tonight so i am going to hit this hard,
Just for my own sanity if anyone can difintively answer this question: The brightness of the Monitor is fine so I know it is getting the correct voltage from the vid amp. I am getting a picture on the monitor and the colors look good so those connections are good. The only problem is getting the picture to stay in one place, it wants to roll to the side then it starts going up vertically then down then diagonal then it will slow down to a crawl, mocking me like its going to fix itself and then it starts rolling again. I saw this monitor working on an Afterburner cab hooked up like a normal arcade, not pc. My question is: Isn't the only possible reason for a rolling screen some sort of sinc issue providing all the pots and caps are good? I just want to know so I can focus my assault this evening.

Chunce DeLeone · « **Reply #17 on:** September 23, 2009, 11:50:48 am »

Found this is the manual, going to try tonight

Chunce DeLeone · « **Reply #18 on:** September 24, 2009, 09:01:24 am »

First sorry for no pic but my wife had the camera last night.....will have one tonyt
Things have gone from bad to worse...the picture i am getting now is smaller and crazy, its shorter on the sides and on top, and wavy lines all over

Also the picture used to fill the whole screen but was just rolling all over the place sometimes slow sometimes fast, but i could easily diostinguish what was on teh screen, now it is absolutly crazy, things are flying around all over the place. H&Vhold change things but do not come close to righting the screen at alll anymore. I also hooked this up with normal jamma wiring, to bypass the vidamp and popped a Streetfighter pcb into the jamma harness and got no picture, then i put a jpac in there and got what i described earlier, which is the same that i got with the video amp, When I put the jpac into my Nintendo/Sharp monitor the picture is perfect. So I think this monitor is hosed. From the decription i gave does anyone have any idea how to fix this monitor or what parts may be the culprits?

I haven't tried any of the sugestions from Kevin Mullins about checking caps becasue i have never discharged a monitor before, don't know where or what the cold solder joints are and i am waiting till the last moment to do this.

kjoel0123 · « **Reply #19 on:** September 24, 2009, 12:53:20 pm »

Call me to discuss. I have PM'd you my #.

Monitor tested well as you seen before it was pulled from the cab. Possibly you could have blown something in it when you were the ground when you touched the transistor. Bring it on by and we'll toss it back in the cab. I also have a nice working nintendo monotor for ya but it will need to go with a nintendo wired cab as nintendo uses 100v and not 120v.

Chunce DeLeone · « **Reply #20 on:** September 24, 2009, 03:42:56 pm »

Thanks Keith!!!!!!!!

, cool I'll throw the monitor in my car and give you a ring tommorrow.

Chunce DeLeone · « **Reply #21 on:** September 24, 2009, 07:48:44 pm »

[youtube]http://www.youtube.com/watch?v=6j0TWUWksO8[/youtube]

There was a white line on the monitor when ist 1st started then it looked like the utube vid..

Chunce DeLeone · « **Reply #22 on:** September 25, 2009, 11:06:43 am »

Monitor is in the truck, does that vid mean anything to anyone? I had to open a utube account to post that vid.

Kevin Mullins · « **Reply #23 on:** September 25, 2009, 12:23:32 pm »

The vid appears to be Windows with Sync issue. Like a resolution that monitor is not fully capable of.

The pic looks like vertical collapse, which is a whole nother story.

Chunce DeLeone · « **Reply #24 on:** September 25, 2009, 02:41:56 pm »

What a cap kit fix this ?


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