03-06-2015, 01:14 AM
The digital readouts are quite tricky to work on. The input signal is constant currant in and resistors are switched to produce a voltage that is measured by a DAC to translate them into digital codes that are used to select what is to be displayed from some kind of memory.
It then displays them on the CRT all using late 1970s TTL.
I had a quick look at the manual tonight and had my first poke with another scope. So far I have eliminated some chips and got no conclusive result from others.
More manual reading to do now.
It then displays them on the CRT all using late 1970s TTL.
I had a quick look at the manual tonight and had my first poke with another scope. So far I have eliminated some chips and got no conclusive result from others.
More manual reading to do now.
