UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Nascom repair

julie_m · 24th Oct 2017, 2:48 pm

The circuit is pretty much textbook -- probably not surprising really, though, given that the textbooks were only written after the Nascom was designed!

If the display RAM chips are socketed, try wiring some of the output pins to 0V and leaving others floating. You should get a screen filled with the same character over and over again.

24th Oct 2017, 2:48 pm	#6
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: Nascom repair - Looking for clues please The circuit is pretty much textbook -- probably not surprising really, though, given that the textbooks were only written after the Nascom was designed! If the display RAM chips are socketed, try wiring some of the output pins to 0V and leaving others floating. You should get a screen filled with the same character over and over again. __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.