For Authorized McIntosh Service, use your zip code in this Service Locator.
You should be able to use another input. If AUX was used for HT bypass, then you would need to change HT bypass in the preamp's setup menu to the other input selected.
Ground Loop Video and advice.
For Authorized McIntosh Service, use your zip code in this Service Locator. You should be able to use another input. If AUX was used for HT bypass, then you would need to change HT bypass in the preamp's setup menu to the other input selected. |
From watching the video and reading your explanation I think one of your Interconnects has a broken connection on the Ground or Return side With the power cable resting on the ICs ... it pushes the return wire and makes contact with the ICs shell and is grounded When you lift the power cable the return wire is pulled away from the shell and causes an open which you hear as that buzzing Rest the power cable back on top of the ICs and it pushes the return wire back just far enough to make contact with the ICs shell and the buzz goes away Pick the power cord up and tapping the ICs shows an intermittent problem ... when you tap and apply pressure to the ICs it pushes the return wire back in contact with the ICs shell and the ground is complete and buzzing stops until the wire opens up again and the buzzing returns The pressure of the power cord resting on cables and or the tapping of the cable both complete the circuit by pushing return wire back in contact with the ICs shell or ground point I think you have a bad Interconnect with a broken solder joint on the ground or return side Try replacing the interconnects with another pair to see if that solves the problem . |
From watching the video and reading your explanation I think one of your Interconnects has a broken connection on the Ground or Return side With the power cable resting on the ICs ... it pushes the return wire and makes contact with the ICs shell and is grounded When you lift the power cable the return wire is pulled away from the shell and causes an open which you hear as that buzzing Rest the power cable back on top of the ICs and it pushes the return wire back just far enough to make contact with the ICs shell and the buzz goes away Pick the power cord up and tapping the ICs shows an intermittent problem ... when you tap and apply pressure to the ICs it pushes the return wire back in contact with the ICs shell and the ground is complete and buzzing stops until the wire opens up again and the buzzing returns The pressure of the power cord resting on cables and or the tapping of the cable both complete the circuit by pushing return wire back in contact with the ICs shell or ground point I think you have a bad Interconnect with a broken solder joint on the ground or return side Try replacing the interconnects with another pair to see if that solves the problem . |