Question about Sony STR-DB840 Receiver
My STR-DB840 had no sound from center channel nor sub channel, other four channels worked fine. Ended up being a faulty AK4527 DAC chip on the digital board. This little ****** has 3 serial data inputs: First one takes care of L and R, second is for rears and the third is for center and sub. No idea how a thing like this can fail, i bought the unit almost new but second-hand eight years ago and used it until now with 2 large front speakers and rears so maybe the problem was there all the time.
Swapped the data lines 2 and 3 by soldering and crossed the analog wires at the AU switch board connector so that the three front channels and sub are now okay but the rears are sacrificed. Works for my 2.1 setup though.
the AVR could still be used for 5.1 with an external decoder as the 5.1 inputs do not need the DAC.
Posted on Dec 03, 2011
Make sure sub is working .Power it up , remove sub RCA jacks from receiver .Gently tap on RCA with fingers.You should here a hum when touched .You can also try audio from TAPE REC OUT .If you dont get audio .Check setting at sub .If it working okay check setting at receiver and or sub level at receiver
Posted on Jul 21, 2009
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:
Oct 07, 2011 | Sony STR-DH810 Receiver
Mar 21, 2011 | Sony STRDH810
Feb 08, 2011 | Sony STR-DH500 A/V Receiver
Sep 26, 2010 | Sony STR-DB840 Receiver
Jan 08, 2010 | Sony STR-DE598 Receiver
Aug 21, 2009 | Sony STR-DH700 A/V Receiver
Feb 24, 2009 | Sony STR-DE475 Receiver
Jan 27, 2009 | Sony STR-DB840 Receiver
Oct 28, 2007 | Cerwin Vega VE-28S Subwoofer
Aug 28, 2012 | Sony STR-DB840 Receiver
414 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: