AndrewD4492
New Member
Hi all
Im in the middle of refurbing a Marantz (1180DC). So far sounds great, but now at mid volume and above I'm getting distortion on both channels that is worse on the left.
I can reduce volume and distortion goes. Cant get volume past 10.00 o'clock.
I was thinking that the MV1 varistors are not doing their job. However at a loss with what I can replace them with. Any ideas? If its not them - I am at a loss of where to go. Please refer me to another thread if more appropriate.
I dont have an oscilloscope so cant see whats happening live. I have replaced all transistors with new including small signal, medium drivers and power trannies. Have tested resistors for integrity and value. I have seperated pre and power amp. Preamp very good. Issue seems to be with power amp alone. Disconnected relay board and peak indicator board, problem still persists. Also replaced all caps. Help in troubleshooting needed! Thanks Andrew
Im in the middle of refurbing a Marantz (1180DC). So far sounds great, but now at mid volume and above I'm getting distortion on both channels that is worse on the left.
I can reduce volume and distortion goes. Cant get volume past 10.00 o'clock.
I was thinking that the MV1 varistors are not doing their job. However at a loss with what I can replace them with. Any ideas? If its not them - I am at a loss of where to go. Please refer me to another thread if more appropriate.
I dont have an oscilloscope so cant see whats happening live. I have replaced all transistors with new including small signal, medium drivers and power trannies. Have tested resistors for integrity and value. I have seperated pre and power amp. Preamp very good. Issue seems to be with power amp alone. Disconnected relay board and peak indicator board, problem still persists. Also replaced all caps. Help in troubleshooting needed! Thanks Andrew