this radio is from December 92, the board is PC 412AG. This radio is made in the Philippines. It has a lot of resistors 1/8 and 1/4. As you see in the video, the PL is unlocked. When i got the radio it has noise toy echo board and variable power double voice lock and audio mods. I'm trying to put it back as stock maybe the problem is on the voice lock which is unlocked now. I hope you can help.