I had no picture on my MTX512, so I bought a new LM1889N chip for the video board.
I now get a picture, but only black & white on the composite output (haven't checked the RF yet).
I was looking at the schematic for the video board and noticed that there are a link which can be set
in mode a or b, which switches the composite output between color and B&W and sure enough, my
video board was soldered with B&W setting. I resoldered the link for color and now I get color composite output.
I'm not sure if this is common knowledge, just thought I would write down my experience here in case anyone needs it.
MTX Video board
Re: MTX Video board
Hi,
thanks for taking the time to post your experience.
Whilst perhaps not "common knowledge", it is known, and I do mention in on my website - on this page amongst other places
http://primrosebank.net/computers/mtx/mtxmaint.htm
regards
Dave
thanks for taking the time to post your experience.
Whilst perhaps not "common knowledge", it is known, and I do mention in on my website - on this page amongst other places
http://primrosebank.net/computers/mtx/mtxmaint.htm
regards
Dave