stozek2000
New Member
Hello;
I have a Yamaha CA-2000 amplifier (CA-2010). There is a problem with the left channel. I hope to get help in this forum. The protection relay does not work. I checked all the power supply voltages, They're ok. I detected a problem in the left channel.
When I connect the amplifier through the bulb it starts to blink.
Look at the movie:
I noticed that this reaction is caused by a resistor fuse FR301 which I marked on the schematic.
I also found something else. When I disconnect any of the power branches ( +/-68; +/-27 ) the problem disappears.
Look at the movie:
The light bulb is my protection against high current. In no case does the protection relay not work. I checked all the transistors in the channel with my meter. I also checked all ceramic capacitors. They are all working. I replaced all electrolytic capacitors. You can help me with my amplifier problem? How can I find the cause of the + 68V branch overload? I add a schematic with marked FR301
Sorry for my English, I hope you understand me
I have a Yamaha CA-2000 amplifier (CA-2010). There is a problem with the left channel. I hope to get help in this forum. The protection relay does not work. I checked all the power supply voltages, They're ok. I detected a problem in the left channel.
When I connect the amplifier through the bulb it starts to blink.
Look at the movie:
I noticed that this reaction is caused by a resistor fuse FR301 which I marked on the schematic.
I also found something else. When I disconnect any of the power branches ( +/-68; +/-27 ) the problem disappears.
Look at the movie:
The light bulb is my protection against high current. In no case does the protection relay not work. I checked all the transistors in the channel with my meter. I also checked all ceramic capacitors. They are all working. I replaced all electrolytic capacitors. You can help me with my amplifier problem? How can I find the cause of the + 68V branch overload? I add a schematic with marked FR301
Sorry for my English, I hope you understand me