Vertex FTL 2011
Hi. Thanks for your help. Now I check the circuit and look for that part. Layers with a better preset so I can download it, since it is very strong. On the other hand I planned to eliminate it directly, and incorporate a 555 as a pulse generator to scan the 4 channels. With an NPN setting the Chanel button. Let's see what comes out.
I thank you
Alejandro LW7EEA
Now I'm telling you what you want to do ... I suggest you try to find the model that comes with a display that has the option of SCAN. I uploaded a photo to your original message with the control board to see what model it is .... some come with registration but others do not. The one I am referring to no longer has a battery to keep the memories. The other two have a battery soldered to the CR2032 PCB.
Well, looking at the schematic pin 33 has no connection. But I found on pin 21 says TONE. I don't know if it will be that.
Regards
Good perfect. At first glance the plate is the same 1A. But right now I don't have the radio with me. Yes, the one with a display already has a scan, but I want to do it with this one. The odd thing that pin 33 with connection does not appear in the service manual, unless for 1A and 1C they are different service manuals, which I do not believe.
From my point of view I suppose that it will be easier for you to make the model board that has a display to adapt with a 555 + counter + adapter / button + control logic because the scan must stop when it finds a signal or jump in search of a Empty channel and being able to get stuck in it as scheduled and do all that with discrete analog logic is more difficult than doing what I said. To change the version of the device, you have to read a device with more channels, change the front in the 4-channel device and record with that data the original 4-channel device to expand it to more channels.
The scheme of the board 1A is not the one that you climbed so there is no pin 33 connected. Each plate has its scheme and its nomenclature is more they are not 100% interchangeable with the MAIN plates. There is not only one service manual but one for each plate model. Find one that has 1A and you'll see what it tells you.
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