mcaddie7
Active Member
Howdy all,
So I have a Nikko NR 1019 that has been giving my troubles. After some time, the right channel will drop out. Now I've troubleshot this to be up to the Amp board as the receiver has a Pre Out / Main In jumper on the back. Both L/R Pre Amp signals go through the Left Amp fine, but both L/R amp signals are dropped (VU meter also stops dancing) going into the Right Amp Main in when it is acting up.
Soooo, I decided to clean all pots, as well as check the bias and DC Offset; all looked great, but problem not resolved.
I then decided to replace the relays and caps on the protection relay, as when you cycle power to this receiver, the right channel immediately comes back to life. Everything still worked but alas the issue persists.
My next thought is just to replace all caps, and transistors on the protection circuit, as well as the amp board. Any other tips / suggestions. I've been working on this for quite some time so am getting frustrated that this keeps cutting out on me.
Block Diagram
Amp Circuit
And here are the parts I want to replace. Resistors and Diodes I'm assuming are okay as those don't general cause these issues right? My thoughts were E caps and transistors:
Now I'm unsure if I should be replacing M caps as well, or if there are other troubleshooting guides / methods which might pin point the culprit. I also know that only some of these parts are for the right channel but am having a hard time telling as this would cut my list in half. Thank you for any and all help.
So I have a Nikko NR 1019 that has been giving my troubles. After some time, the right channel will drop out. Now I've troubleshot this to be up to the Amp board as the receiver has a Pre Out / Main In jumper on the back. Both L/R Pre Amp signals go through the Left Amp fine, but both L/R amp signals are dropped (VU meter also stops dancing) going into the Right Amp Main in when it is acting up.
Soooo, I decided to clean all pots, as well as check the bias and DC Offset; all looked great, but problem not resolved.
I then decided to replace the relays and caps on the protection relay, as when you cycle power to this receiver, the right channel immediately comes back to life. Everything still worked but alas the issue persists.
My next thought is just to replace all caps, and transistors on the protection circuit, as well as the amp board. Any other tips / suggestions. I've been working on this for quite some time so am getting frustrated that this keeps cutting out on me.
Block Diagram
Amp Circuit
And here are the parts I want to replace. Resistors and Diodes I'm assuming are okay as those don't general cause these issues right? My thoughts were E caps and transistors:
Now I'm unsure if I should be replacing M caps as well, or if there are other troubleshooting guides / methods which might pin point the culprit. I also know that only some of these parts are for the right channel but am having a hard time telling as this would cut my list in half. Thank you for any and all help.