Horizontal hold doesn't hold.

[Thredh]

Hey all, I'm new to the forum, but I've been doing the Mame thing for a while.  I've got a Mame Cabinet set up and working, made out of a streetfighter cabinet, using j-pac, arcadevga, etc.

I wanted to make another one using the same setup, so I went to the SuperAUCTIONS auction today in Los Angeles and picked up another Streetfighter machine.

Everything seems to be in order except the monitor.  It scrolls horizontally.  I can't find any vhold or hhold adjustments in the back of the thing.  Tomorrow I plan on taking the monitor out of the cab and checking it out, but I was just wondering what it sounds like the problem is, so I came to ask a few questions.

1.  Do all monitors have hhold and vhold adjustments?

2.  Is this a common "cap kit" problem?  In other words, is this something a cap kit commonly fixes.

3.  I swapped in my other streetfighter board, and the game worked fine, but the monitor still scrolled.   I then hooked the Jamma harness from the new (non working monitor) streetfighter into my J-pac that I have hooked into my working mame cab and I got no picture at all.  I then hooked it back into the working one and it still worked just fine.  The video on the cabinet comes through the jamma harness, so I assumed it would give me horizontally scrolling MAME instead of streetfighter.  Anyone know why it would give me nothing?

That's all for now...I'll come back with more info tomorrow, but if anyone has any suggestions, I'm all ears.

Thanks,

Mike

[Ken Layton]

All commercial arcade game monitors have horizontal hold (sometimes called horiz freq.) and vertical hold controls either on the main monitor circuit board or on a small "remote adjustment board" located somewhere in the cabinet and connected  via a harness.

[Thredh]

Well, So far I've only found the V-hold, v-position, h-position, and h and v size.  Can't find h-hold (or h-sync) anywhere on the board.  Either way, I'm still curious as to what other problems this symtom could indicate.

Could needing caps replaced cause horizontal scrolling?  A friend of mine mentioned something about a h-synch transformer (i think transformer, maybe he said transistor) that tended to go out because it gets hot.

Either way, I'm having trouble even figuring out what model monitor I have.  I'm not sure if the monitor is the original one from the cabinet, but the cabinet is an older atari cabinet modded into a sf2 cab.  The monitor does have a self degause board on it, I noticed, so it couldn't be that old.

Anyone have any more insight?  Any questions I could answer that might help?

[Ken Layton]

How about posting a picture of the back of the monitor? We may be able to identify it then.

[DaveJ-UK]

It's a long shot, but I didn't notice a couple of the adjustment pots on my monitor because the twisty bit (technical term) on the pot had come off and had been covered up by dust and other kak.

Or just try smacking the side of the cab like you do your old TV...