Cheap upscaler

[mojo1999]

Hi
   
  Just got one of these for my 1200.  
   
  http://www.ebay.co.uk/itm/CGA-EGA-YUV-RGB-TO-VGA-converter-1-VGA-output-arcade-game-board-PCB-Brand-New?item=260947539632&cmd=ViewItem&_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D1%26po%3DLVI%26ps%3D63%26clkid%3D6795879106741393418
   
  Can some on help me with the Amiga video connector.  
   
  I have connected pin 3,4,5 (amiga) to RGB (scaler) and pin 10 (amiga) to sync (scaler).
   
  I connected the ground on the upscaler board to one of the ground connectors, pin 16 on the amiga video connector.
   
  I fired it up and it gave me a display at 800x600.
   
  The picture looks good, however I’m seeing grey lines in the image, especially on the kickstart screen.
   
     1)  Are these the correct pins on the amiga port

  2)      do I have to connect all the ground pins?
  3)      Is this a problem with the 1200?


   
  Overall the picture is not bad and is a cost effective way of using your amiga on an LCD display.
   
  Many thanks