Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: ForKChop on July 30, 2004, 03:27:34 pm

Title: Centipede not centered on monitor, please help!
Post by: ForKChop on July 30, 2004, 03:27:34 pm

I've put a Sampo KGR-1901H monitor into my Centipede. I've got the image to sync and it looks just fine, OTHER than it's not centered vertically. (Horizontally to the monitor) This monitor has a jumper with three tabs L(eft) C(enter) and R(ight) for the horizontal position, and the image does move if I move the jumper, but nowhere near enough to get this image centered. It's wrapping around the top and bottom of the screen. Anybody know I fix this?

(http://superluckyelephant.com/images/centipede_monitor.jpg)

Thanks
Vanessa

Title: Re:Centipede not centered on monitor, please help!
Post by: MonitorGuru on July 30, 2004, 04:25:50 pm

I'd start with a cap kit, but that is some pretty severe positioning problems.    Also try playing with the horizontal width coil to see if that does anything useful.  I don't know anything about a Sampo monitor, so can't help you with exact specifics.

The OTHER thing you could do is to flip the yoke wires to rotate the image 180 degrees, and see if that helps centering, but then you'd have to rotate the monitor in the cabinet.

I know I've done this on a Wells Gardner K4600 monitor that would not display Arkanoid II jamma board correctly on one orientation, but flipped the yoke signals and rotated it and it fit the screen much better.

Post if you need assistance in flipping the yoke correctly.

Title: Re:Centipede not centered on monitor, please help!
Post by: ForKChop on July 31, 2004, 01:18:04 am

I think I'll give the cap kit a whirl first.  Hopefully it'll work and I'll post back that it's all good, otherwise I guess the yoke flip is next...

Thanks :)

Title: Re:Centipede not centered on monitor, please help!
Post by: MonitorGuru on July 31, 2004, 09:45:21 pm

Yoke flip is MUCH easier and costs nothing.  Cap kit will cost you at least an hour of time, plus ordering and waiting for the parts.

I'd do the yoke flip just to see if it brings things in better.  Just swap the yellow + green wires, and then the red+blue wires running to the yoke (with the tube off).  If on power up you don't have a full sized picture, only a single vertical or horizontal line or a single hugely bright dot in the center, power off IMMEDIATELY as you've oviously not reconnected the wires correctly.