UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Non-working Commodore PET 3016

SiriusHardware · 25th Feb 2021, 5:22 pm

OK, could you capture UD6 pin 20 (scope channel 1) against each of the other data lines DA1-DA7 (Scope channel 2) at the CPU mainboard socket.

Also check the voltage on pin 21 (CS3) of UD6 (should be high ~5V).

Mark, you were the one who originally suggested that scope - do you know if it has any kind of logic analyser capability? It came with an awful lot of test clips, which suggests that it might.

25th Feb 2021, 5:22 pm	#668
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,588	Re: Non-working Commodore PET 3016 OK, could you capture UD6 pin 20 (scope channel 1) against each of the other data lines DA1-DA7 (Scope channel 2) at the CPU mainboard socket. Also check the voltage on pin 21 (CS3) of UD6 (should be high ~5V). Mark, you were the one who originally suggested that scope - do you know if it has any kind of logic analyser capability? It came with an awful lot of test clips, which suggests that it might.