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

Timbucus · 4th Sep 2021, 8:06 pm

I don't actually use a probe so can't help on that - I suppose we should establish what that situation means - perhaps an indication of a square wave? What shows if you probe the Z80 Clock pin (pin 6)? - Also confirm that the Ground (Pin 29) and 5v (pin 11) show an expected Low and High to prove the probe is working.

4th Sep 2021, 8:06 pm	#9
Timbucus Octode Join Date: Mar 2019 Location: Barry, Vale of Glamorgan, Wales, UK. Posts: 1,364	Re: Sharp MZ-80K help needed on repair I don't actually use a probe so can't help on that - I suppose we should establish what that situation means - perhaps an indication of a square wave? What shows if you probe the Z80 Clock pin (pin 6)? - Also confirm that the Ground (Pin 29) and 5v (pin 11) show an expected Low and High to prove the probe is working.