EF Johnson 51SL models not communicating

[Pinzmog]

I wanted to post this and see if anyone has ran into a similar situation involving EF Johnson 51 model radios. I am Programming a small group of Radios in V4 and V6 models.......lets just name them Radio A thru Radio Z .......all are programmed the same with 3 Analog and 3 P25 Conventional channels using same 3 frequencies in a Bank 1, Bank 2 grouping.......really simple layout.

Here's the Problem........Radio "A" will communicate with Radios C thru Z perfectly.....but not Radio "B"
Radio "B" will communicate with Radios C thru Z perfectly......but not Radio "A"

So Radio A and B are deaf and mute "only" to each other.......but work perfect with the rest of the fleet.

Both are 51SL partial keypad models V4 and updated to latest V4 update.

LOL, it's like having siblings that are angry with each other.......they talk with everyone else but not to each other!

I have looked at the codeplug over and over.........all are the same except the PTT ID numbers which are unique to each radio......also all V4 models with partial keypads programmed using same codeplug with only PTT ID numbers changed.........no duplicates in PTT ID either which was my first thought.

Any ideas?................Thanks in Advance!

 

[AM909]

Assuming you have two other partial-keypad radios in the batch – "C" and "D", read and save all four codeplugs. Then, put the C codeplug in A, D codeplug in B, A codeplug in C, B codeplug in D. Now test. What happens? Does the problem remain in the A and B radios or did it move to the C and D radios (both when talking to E, F, G, etc.)?

 

[ecps92]

When did each radio last see a Service Bench ?

 

[Pinzmog]

No documentation provided by the Agency who inherited them from another Group…….probably haven’t seen a bench in a long time.

Great idea on swapping the codeplugs around……I’ll try that this week when I get some free time. If I have to, I guess I’ll just mark them for parts, but hoped to save them if possible. I’ll update when I try switching the codeplugs around…..Thanks!