Now you’ve got a real problem. (actual circuit problem)
check the voltage in the relay input pins with a multi meter. There should be no voltage. If there is a voltage then there is a problem with the amplifier circuit.
If you’ve done that already and there is no voltage there, then, well..now you are getting into real and actual problem solving of a complex set of circuits.... and that is just not going to work out very well on a forum, in a few posts.
Additionally, due to the age of the unit and the parts that Panasonic was issuing at the time, a notable amount of some of the smaller signal capacitors probably need replacement. Those capacitors are 38-39 years old as of this year.
FYI, it is identical to the su-v909, where the 909 is brown faced and has international voltage switching.
check the voltage in the relay input pins with a multi meter. There should be no voltage. If there is a voltage then there is a problem with the amplifier circuit.
If you’ve done that already and there is no voltage there, then, well..now you are getting into real and actual problem solving of a complex set of circuits.... and that is just not going to work out very well on a forum, in a few posts.
Additionally, due to the age of the unit and the parts that Panasonic was issuing at the time, a notable amount of some of the smaller signal capacitors probably need replacement. Those capacitors are 38-39 years old as of this year.
FYI, it is identical to the su-v909, where the 909 is brown faced and has international voltage switching.