UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Help needed with

frsimen · 18th Feb 2023, 10:10 pm

Hello Mark,

Before changing IC24, just check that there are pulses on all four input pins (9, 10, 11 and 12) just in case the main counter has stopped. If they are all present and there is no pulse on the output, IC24 has failed.

Paula

18th Feb 2023, 10:10 pm	#113
frsimen Heptode Join Date: Jan 2011 Location: Croydon, London, UK. Posts: 773	Re: Help needed with - Racal Dana 9081 Hello Mark, Before changing IC24, just check that there are pulses on all four input pins (9, 10, 11 and 12) just in case the main counter has stopped. If they are all present and there is no pulse on the output, IC24 has failed. Paula