UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Sharp MZ-80K help needed on repair

SiriusHardware · 12th Oct 2021, 8:05 pm

Sorry, I think maybe my terminology leaves something to be desired - for me a digital 'waveform' is any signal which has a mixture of high parts and low parts in it, not necessarily 50-50 high-low like the ones you saw on the address lines in the NOP test.

The pulses you see (when you alter the time / div) need to look nice and sharp and square, not buckled or rounded.

What about the H-Hold control on the CRT display, can you get to that to try adjusting it a little?

12th Oct 2021, 8:05 pm	#286
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,556	Re: Sharp MZ-80K help needed on repair Sorry, I think maybe my terminology leaves something to be desired - for me a digital 'waveform' is any signal which has a mixture of high parts and low parts in it, not necessarily 50-50 high-low like the ones you saw on the address lines in the NOP test. The pulses you see (when you alter the time / div) need to look nice and sharp and square, not buckled or rounded. What about the H-Hold control on the CRT display, can you get to that to try adjusting it a little?