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dear charlie_ps2, v4 Z pt - need your help
I haven't got a v4 open on the bench. But it would help significantly if you can get a continuity meter and test the NH3 Z point continuous with the Magic2/3 Z point. That would prove whether or not they are the same electrically.
As to the via, there is no via at Z. That is a copper pad that has to have the lacquer scraped off and then be soldered in the normal way. Your arrws obscured your picture so I can't comment on point 1.
OH..... Sorry.... Would you mind check this photo for clear image?
Point1 is the pad left next to "Reset"
Point2 is the small hole (via?) directly below Point1 (right next to Z pt of Magic2/3).
I am curious to Z pt because Future2k has tested NH3 before and he found that if Z pt was connected then he will have "tray doesn't close" problem. May be the diagram is incorrect? :O
Looking forward to your NH3 review~~ :P
I don't really understand what your problem is. Just attach to the Z pad in the Magic 3 diagram. No via need be involved.
But I would like you do a continuity check between that point and the one for the NH3 if you wouldn't mind. If there is continuity (Zero ohms) then the problem is with the NH3; if there is no continuity then it might be the wrong point and the Magic 3 point should be tried.