Batboard

I've tried a search and can't find anything that has this problem.
I just bought two vhf a4 spectra low power radios. The came with the control heads set up as remote mount. I want to use one as a dash mount so installed one head onto the radio control unit.
When I attempted to program the radio it would read and write to the radio but I kept getting a fl 01/90 error code. The radio would work, but act goofy.
When I set it up as remote mount it works just fine.
Any ideas as to what I might be doing wrong?

Dennis

What's the part number on the interconnect board for the dash-mount radio? Certain versions are incompatible with A4 heads and cause erratic behavior.

FAIL 01/90 Is a very general fail code which could be caused by almost anything unfortunately.


-Josh

Check the cables between the radio and the control hade, I hade the same problem and it turned out to be the connection at the control hade end, but it could also be the power cable.

Fail 01/90 is actually a pretty specific fail code, it means there is a communications failure between the radio and control head, basically for whatever reason the processors in the radio and head aren't talking to each other.

Since you say yours works okay as a remote mount I would also suspect the interconnect board.

I'm not at home at the moment, I'll check the model number of the interconect board Thur. It should be faily new though, it came out of version 6+ mlm radio.

Dennis

Also make sure none of the interconnect pins got bent when you put it in. I've seen that happen a few times, two pins will get bent together and forced into one hole, or an end pin will miss the hole.

The model number of the board is hln6285a, the pins look ok but when I put it back I'll make sure. This board came with an a5 head.

Dennis

I just put the A5 head on the radio as a dash mount and still have the same problem. I'm getting a headache.

Dennis

A5 and A7 heads are the same, the only difference is the faceplate and what the radio thinks it is... and that's just a hex edit away from being whatever you want.

The whole phenomenon, however, is very interesting to me because I usually have the problem of having errors when running a remote setup rather than dash-mount.

The radio should work the same whether it's dash or remote configured. Since you've tried it with two different radios with the same result, this is mind-boggling.

-Josh

HLN6285A should work with an A4 or A5 head, perhaps the one you have is bad... inspect it for cut traces, jumpered traces, solder bridges, poor solder joints. See if you can get another known good one to try.

What model radios are they anyway?

i have 2 cradles and when i fit the XTS3000 radios to the cradles i get the same fault 01/90
i know the radio is good.
the cables are good
changes a 4053 chip in the cradle now the control head gets power showing this 01/90 fault code.
to get power i changed a voltage reguator.
What ever is faulty took out the regulator and a 4053 chip.
this is why i have repaced those.