Well I'll continue my thoughts on moding it here then. Karyudo it appears even my electrical knowledge is more than yours. It does appear that you hit a hitch, though, as laserman says there are five independent NTSC decoders on board, which are then used together in the final output. I understand this complicates things for several reasons. My best advice for Laserman would be to mod a more expendable - but similar NTSC unit first, and see if it works. Yes your dummy unit won't have the same complications of the 5 NTSC processors, but it will provide a starting point.

Yes, there is no "tap here for pal" - but it's really not THAT complicated. It wants to process the picture it's read, all you have to do is feed it's information through the right circuitry in the right way. The first, and most obvious thing is the frequency, changing that is no problem. The only real problem is the fact there's no PAL processor on board to decode a PAL output. You may be able to coax the NTSC ones into it, however you'd still have an ntsc signal. Laserman I expect could explain this to you far better than I ever could, but basically the PAL standard features more stable hues, wider luminance bandwidth and a higher gamma ratio than NTSC. So, when I play an NTSC DVD on my home player I have it set to output PAL to take advantage of those features of the PAL signal system. It outputs PAL-60 instead of NTSC, which has the same number of lines as NTSC at the same frame-rate, but better colour and contrast. And it is visibly better on my TV. Fleshtones look much more consistent, NTSC likes to make fleshtones look too red.

Now if you play a PAL LD and output it in a hybrid 50hz NTSC signal, well you loose all the advantages of the PAL colour system. You lose the contrast definition, and the hue stability.