to N9IB
Thanks a lot, so the battery holder has the positive in the solid one. Like a battery. The (my) "female" in the radio plug has a RED line. showing that that is positive and therefore there should be plugged the solid "male" from battery holder. I did not mention it, because I dont know if that was Yaesu idea, or I marked it myself when my battery holder was damaged. Maybe all radios have that red line in the "female" clip, I mean the one with the wire, not the battery holder.?
In the meantime, I checked the service manual, and saw that the input has a diode to avoid inverse voltage. The other is ground. That is the good thing. The bad thing is that the diode goes directly to pin 20 of microprocessor Q05 and pin 15 of uP17 in CPU Unit.
So the connector itself, I think it has to be handled with care to avoid static, What I have never done haha
Again, thanks and 73
EA1FC
