Hi everyone, it looks like 2 of the channels on this 3 channel choke (L14) are open circuit on this Aiwa J202MkIII. I exposed the copper as I thought there may be trace damage as it is close to the jack but this is not the case (unless I damaged it with heat adding solder to these traces, but I know the ground one was open for sure). I did remove it to verify. Does anyone know where I could find one or what type of alternate fix would be suitable? (Complete bypass?). Any guidance would be appreciated. Jehr
I read from somewhere that you can rewire it with 0.1mm enameled copper wires. 3 wires 13 turns in the same direction.
Ok, I just took it apart and I think you are right! 12.5 turns (as it goes to the other side), wire is 0.07mm it seems. I think I can rebuild this under the scope. I’ll let you know how it goes. Thank you!
Hi, You can use three individual units instead the chip one. There are coils with the same appereance of an axial carbón resistor, typically green coated actually they are coils. I could get those fron an other aiwa unit, and could fix It. You have to check that have the same henrios
Success! I picked up 0.1mm on Amazon and wound it up. It is spilling over the channels a bit so 0.07mm would be better. I did 12.5 turns as that is what I thought I took off. Not sure if there is any significant performance difference but seems to work great. Note that I glued it with E6000 to a wood skewer to help with the surgery . Once complete, I sanded some of the enamel off at the leads and pre-soldered it before reattaching to the board. I think the issue was that the other inductors nearby were hand soldered and there was quite a bit of corrosion in the area. Thanks for the idea.
