thats it. on the JDM one doing the area switches doesnt do anything.
you should have a PN2613/14 for the jap unit. I have the FSM for that here if someone wants to host it.
the area 'code' is hard coded into the CPU and the face. its not as simple as moving two jumpers around. a LOT more has to change to fix the radio issue. the AM/FM front end is one of them.
mving the jumper for bose does two things. drops the output volume,enables the amplifier turn on.
the non bose units DO NOT have the amp on ckts.