Time Killers board not syncing. Any TK Buffs???

whoamonga

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Hi,

Well I thought this might be remedied with some monitor adjustments, but to no avail... The manual shows that dip #1 toggles between Positive and Negative sync. In my k4900, neither works, even after tedious adjustments.

Tried it in my working Street Fighter, and same thing... so it's gotta be the board.

I'm working through re-seating all the socketed chips now, and have already re-seated all the interconnecting board pieces.

Does anyone know what part of the board might help to control this? I have another Time Killers board that's simply dead, and could maybe swap out the parts? The manual's not very helpful...

Thanks tremendously for any help!!!
 
Well, I just looked at the Time Killers installation manual, and it doesn't say anything at all about standard or medium resolution. If the resolution was incorrect for the monitor, though, the image would look doubled or quadrupled.

First thing I would do is hook it up to a rebuilt monitor (hopefully the 4900), hook it up for negative sync (with only the horizontal sync wire for a 4900 or 7000), and set dip switch #1 on the board to OFF for negative sync.

Next thing to check is that the connector actually has all three required voltages - +5, +12, and -5. Not all JAMMA games require -5, and some connectors/cabinets don't include it if it's not needed. If you don't have all three voltages, the board will not run correctly.

Then, trace the line back from the sync pad on the PCB and look for any damages. I had one board with no sync, and I found a burnt trace about an inch into the board....
 
It's GOTTA be standard rez, cause the board worked perfectly not too long ago...

I did put it in another working k4900, and the board had the same exact issue.

And because it had just worked a few days ago, and because several other games have worked in this cabinet, that leads me to believe that the sync is connected correctly. Am I wrong?

But speaking of, could you clear the air for me once and for all Mod? What is the black wire, and what's the white wire? One's sync and the other video ground, right?

I'll also check the voltages, but I think there's definitely a possibility of finding something if I trace that sync line back through the board. I'll give it a look-over and see what's up!

EDIT** Here's some videos of what it's doing. Funny, but the screen behaves a little more clearly in test mode...
http://s282.photobucket.com/albums/kk259/whoamonga/arcades/?action=view&current=TKVideo002.flv
and attempted gameplay:
http://s282.photobucket.com/albums/kk259/whoamonga/arcades/?action=view&current=TKVideo003.flv

Thanks for all your help man.
 
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Usually, on a JAMMA harness, the black wire is ground and the white wire is composite negative sync. Every JAMMA harness I've ever seen has those wire colors, but if you are using a custom made one, or an adapter, then it might be different.

The easiest way to tell if you actually have it hooked up correctly is to get a meter and do a continuity check from the PCB edge connector pad to the monitor pin. It's possible there is an intermittent break in there or something.

Another thing to check would be that sync selection dip switch. If it broke internally while you were having problems earlier, it may be stuck on the wrong sync, or stuck in between allowing neither sync to work.

If you are trying it with only the one white wire connected to the monitor sync pins, have you tried making a jumper to the other sync pin as well, just to see what happens?
 
Usually, on a JAMMA harness, the black wire is ground and the white wire is composite negative sync. Every JAMMA harness I've ever seen has those wire colors, but if you are using a custom made one, or an adapter, then it might be different.

This is probably a really good thing to double check. With TK using some of the normally n/c pins/pads/whatever in the jamma standard instead of a kick harness, it's possible that whoever wired the harness got creative with the coloring of the wires. At the least check the colors at the harness end to make sure that the wire coming off of P is the white one and if there's other white wires that they're not the ones connected to the sync pin on the monitor.
 
I was checking out the sync trace on the TK board, when i lost it underneath one of those silver, boxy chips. I think it's one of those security chips... I can take a pic if needed.

But my question is, can I remove this thing w/o damaging the board, as long as I don't fire it up w/o putting it back on? This is so that I might be able to see where the trace ends up going. the trace is in tact up to this point, but I can't locate where it goes from any of the nearby solder points.
 
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