Hi Ray. I looked in the service manual to see if I can offer any assistance (likely not). But I looked at the BITE routines and what gets tested. I was curious if there was a set of BITE tests that would give any indications on problems with the control head. I saw this table:

I know if the head isn’t working you can’t see the error codes, but have you tried initiating a bite test over the remote serial line? Any A20 bite faults reported? At one time you thought you might have a corrupted EEPROM/ROM. I think if the checksum wasn’t right, you should see an 03 fault.

73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos

From: [email protected] <[email protected]> On Behalf Of Ray Fantini via groups.io
Sent: Thursday, April 20, 2023 3:44 PM
To: [email protected]; [email protected]; [email protected]
Subject: [HarrisRadio] Next Thrill Packed video of my RF-5022

Ok, still don’t have the A20 card in my control head working but did build up a external cable and terminal strip thing so I can access the remote control bus and audio bus for the RF-5022, Have a video up of the set up and some stuff about using the Falcom software at:

https://www.youtube.com/watch?v=4fIefKIxRok

Ray F/KA3EKH

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