wdatkinson
Member
After fixing the last audio issue (jumping pins 9 and 12 on the accessory connector) on my last TK-730, I stumbled across another radio on ebay that by description exhibited the same problem. So I picked it up, hoping that it would be as simple a fix as the last. As I opened the package, I immediately noticed that this radio had the loopback connector on it. After a quick continuity test on the connector showed that it was ok, I started looking a little deeper.
I am getting some audio out of the radio, both on at the head and at the radio itself (pins 9 & 12). If I hold the speaker up to my ear, I can hear the audio faintly. I can also adjust its level by rolling the volume control up or down. This was the same characteristic that my other unit had when the loop back was not in place.
When I had my initial problem, I scoured forums, all over the net looking for different solutions. I remember one mentioning that there were some internal mods that needed to be done to properly send audio to the head. So I popped the top on the new-to-me unit and noticed somethings that I did not notice in my other unit. Most obvious is what appears to be an accessory board of some sort. As well as the connector and wires soldered on the black coated PCB in the middle of the board. Whatever that piece is, its tied into CN107 and CN108.
I've attached a pic of the board. I'm looking for the following:
1). A reminder on what had to be done inside the radio to properly get audio to the control head.
2). Can someone identify the extra board and wiring in this unit? I pulled CN107 and CN108, isolating the extra board and the radio appears to run fine.
I am getting some audio out of the radio, both on at the head and at the radio itself (pins 9 & 12). If I hold the speaker up to my ear, I can hear the audio faintly. I can also adjust its level by rolling the volume control up or down. This was the same characteristic that my other unit had when the loop back was not in place.
When I had my initial problem, I scoured forums, all over the net looking for different solutions. I remember one mentioning that there were some internal mods that needed to be done to properly send audio to the head. So I popped the top on the new-to-me unit and noticed somethings that I did not notice in my other unit. Most obvious is what appears to be an accessory board of some sort. As well as the connector and wires soldered on the black coated PCB in the middle of the board. Whatever that piece is, its tied into CN107 and CN108.
I've attached a pic of the board. I'm looking for the following:
1). A reminder on what had to be done inside the radio to properly get audio to the control head.
2). Can someone identify the extra board and wiring in this unit? I pulled CN107 and CN108, isolating the extra board and the radio appears to run fine.
