Page 1 of 1

IFR COM-120B Real Time Clock Failure

Posted: Thu Apr 26, 2018 3:46 pm
by JRayfield
I've got a COM-120B in which the battery in the Real Time Clock (RTC) apparently went dead.

I replaced the RTC module (got several from China) but the Self Test still shows the RTC failure.

Of course, it's possible that the RTC modules that I from China are defective.

Or it's possible that I damaged the circuit board while getting the old RTC module out (the board looks ok, though, and I installed a low profile socket, so I didn't have to solder the new RTC module back in).

Has anyone replaced the RTC module in a COM-120B and had the monitor to continue to show an RTC failure?

Any suggestions?

John Rayfield, Jr.

Re: IFR COM-120B Real Time Clock Failure

Posted: Fri Apr 27, 2018 4:22 am
by jry
it has to be programmed

Re: IFR COM-120B Real Time Clock Failure

Posted: Fri Apr 27, 2018 5:56 am
by JRayfield
Can someone tell me how this is programmed?

John

Re: IFR COM-120B Real Time Clock Failure

Posted: Tue May 01, 2018 4:10 am
by AdrianH
Hello John

Can you tell me if you have anything to program the device with, out side of the IFR as a few bits need to be set. It may be possible to 'poke' some settings into the RTC in the IFR using serial but I have not discovered how to yet.

Adrian