UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - MK14 programming interface

SiriusHardware · 8th Apr 2019, 12:54 am

Well, curiosity got the better of me so:

(Assuming the keypad edge connector pins are numbered 1-16 from top to bottom starting at the reset switch end):

On my (original) issue II MK14...

Taking edge connector pin 16 (Row 0-7 according to me) to edge connector pin 6 produces an '8' keypress.

Taking edge connector pin 16 to edge connector pin 8 produces a '9' keypress.

Those 'NC' connections do therefore go somewhere, but I have never needed to connect them to get an external keypad (or something which simulates one) to work.

Looking at the MK14 diagram (or at least, the diagram for the issue II) the keypad is definitely shown as having keys 0-7 on one row and keys 8-9 on their own row.

Am I right in thinking that the 'fix' for getting this to work with the JM board is to swap over the connections going to edge connector pins 3 and 4?

8th Apr 2019, 12:54 am	#24
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,586	Re: MK14 programming interface - MK2 Well, curiosity got the better of me so: (Assuming the keypad edge connector pins are numbered 1-16 from top to bottom starting at the reset switch end): On my (original) issue II MK14... Taking edge connector pin 16 (Row 0-7 according to me) to edge connector pin 6 produces an '8' keypress. Taking edge connector pin 16 to edge connector pin 8 produces a '9' keypress. Those 'NC' connections do therefore go somewhere, but I have never needed to connect them to get an external keypad (or something which simulates one) to work. Looking at the MK14 diagram (or at least, the diagram for the issue II) the keypad is definitely shown as having keys 0-7 on one row and keys 8-9 on their own row. Am I right in thinking that the 'fix' for getting this to work with the JM board is to swap over the connections going to edge connector pins 3 and 4?