Question about Audio Players & Recorders
There is a humming noise coming from each speaker (5). The noise can be heard with the volume low and no input to the reciever.
I have a similar issue, except the hum only occurs for 4-5 minutes after powering up the unit. The level of hum is unaffected by the volume control, but is greatly reduced by the mute. The hum is on all channels. Looking at the schematic, there are only a few stages of amplification between the volume IC and the mute - all share the same regulated +/- 15 volt supply. My bet is that either the +15 or -15 volt bulk storage cap is going bad on my HK AVR110.
When I have time, I will open it up and use my vintage scope to confirm my diagnosis
Posted on Aug 20, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 30, 2010 | Harman Kardon AVR 510 Receiver
Dec 29, 2009 | Harman Kardon AVR 235 Receiver
Apr 02, 2009 | Harman Kardon HK 3550 Receiver
Mar 22, 2009 | Audio Players & Recorders
Jan 09, 2009 | Vizio VX32L Television
Jan 07, 2009 | Harman Kardon AVR 225 Receiver
Jul 28, 2007 | Harman Kardon AVR 110 Receiver
Dec 13, 2017 | Eclipse Audio Players & Recorders
471 people viewed this question
Usually answered in minutes!