> I photographed both sides of the board and merged the pictures together to > make a front/back composite. The trace for the cathodes of the 3 diodes > links together on the back of the board and doesn't go anywhere else. The > front trace from V302 cathode goes straight to R312. The anodes DO link with > the monitor driver board through the connection marked MON though.
OK, probably some kind of luminance signal. Was there ever a monochrome version of this unit? > One of the reasons I'm asking these questions is I'm trying to see if > there's another source of composite sync given that the MR9735 itself > doesn't do it, even though it should. I doubt it.... Why would there be? Is the MR9735 doing anything? Is it accessing memory, for example? I still wonder if it has to be initialised (say to vewdata rather than teletext mode) and if this is not occuring. -tony
