IIc 9" monitor with American motherboard

[mcoppey <mark.coppey@gmail.com>]

I just swapped the 02-motherboard for my European IIc to an American
03-motherboard. Is it possible that this affects the output to the
monochrome 9" monitor? With the old 02-European motherboard the view
was perfectly centered on the screen. With the American 03
motherboard, I can't get the output centered, it moves to the left and
some lines (4) downwards. Finetuning with the rear knobs doesn't
change anything. Am I correct that apart from swapping character
generator and keyboard decoder ROM, I also have to swap the US 60 Hz
IOU chip for the European 50 Hz version and the Video ROM? (the 28pin
2764 equivalent instead of the 2732 equivalent on the US model). And
where is this video rom situated on both motherboards?

mcoppey