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Hk avr 340, buzzing power switch orange mode no buzzing, blue mode it buzzes blue light also not working

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: Speakers buzz for about 1 minute when powering on or switching

Building on what WheatService said for any other newbs (like me) who may run across this...
1) Go to Radio Shack, get yourself two of the 272-1030 470uF/35V capacitors mentioned ($1.29/each) and a cheap soldering kit (mine came with solder and extras for $8). just take those numbers to the clerk, once he or she tries to sell you a couple cell phones, they should help you find the parts.
2) go home. disconnect the subwoofer from the wall, speakers, and dvd player
3) remove the 8 screws around the edge of the metal plate on back of subwoofer and carefully remove the metal plate and all the goodies attached to it. make sure to disconnect the two wires leading from the rest of the subwoofer to the circuit boards.
4) what you are looking at is two parallel circuit boards with a bunch of stuff in between them. to tell them apart, notice that one of the boards is home to a fan (amongst other things), and the other has the power cord running into it.
5) we want to remove the board that the power cord runs into, so make sure you've got the right one, and remove all of the screws which are holding it in place. again, be sure to unhook any cords before you yank off the circuit board.
6) once the board is removed, you should see two large heatsinks (pieces of metal). one is just a big rectangle that sticks straight up towards one end of the board and the other is kind of t-shaped (from the end) and a monstrosity. you'll want to look in the area between the two heat sinks but towards the smaller, rectangular one.
7) in that area, there may be some white foamy stuff sprayed around. take a look at the capacitors from radio shack and note their size. you are looking for two identical black, cylindrical capacitors roughly the same size as the ones you purchased (but a bit smaller). if you think you have the right ones, take a look at the side of them. you may have to scrape off some foamy stuff, but they should say 470uF/25V.
8) the basic idea here is that those 25V guys need to be replaced with 35V ones (the ones you bought). i'm no expert, but what worked for me is pulling lightly on the existing capacitors while melting the contact points from the bottom with the soldering tool. once those are removed, put the new ones in (push them almost all the way down so most of the wire is coming out the bottom). now turn the board back over and apply a generous bead of solder to each of the four wire points.
9) clip off the excess wire from the bottom, and marvel at your newfound expertise.
10) put the whole thing back together (steps 2-5 in reverse), remembering to connect the wires as you go.
11) turn it on and enjoy!

Posted on Apr 28, 2009

  • 1 Answer

SOURCE: My viper 5701 2way remote works, but gives buzz for all functions

hi did you get this unit from ebay? i am going through the same experience right now and there is a problem with the early units that were manufactured. It will need to be replaced. I am currently trying to get a refund.

Posted on Feb 08, 2010

  • 308 Answers

SOURCE: AVR amber light will not return to blue after

There is an internal reset switch mounted on the transformer board. Open the unit, look at the boards attached to the transformer, the pushbutton is facing up. Measure the voltage on the 2 pins of the switch. If it is a logic low, the switch is partially shorted. Replace the switch or just cut the jumper wire just below thw switch. When this switch fails, it constantly resets the receiver and stops it from powering up. It does not fix a protection mode problem.

Posted on Mar 04, 2010

  • 4234 Answers

SOURCE: HK AVR-247 protect mode

This is an indication of an internal problem. Typically this is shorted output transistors. Expect a parts cost in the $25-$40 range for this repair.


Posted on Apr 06, 2010

  • 1 Answer

SOURCE: My Harman/Kardon AVR 140 is stuck on stand by mode

Try unplug the power. Wait a few minutes. Reconnect the power.

Posted on Jul 25, 2010

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We were listening to music , cd , & a buzzing sound came over sound system then nothing. no functions work at all. Main board lights up but that is it.

If the screen lights up then shuts down this could mean it's going into safe mode the other option is that part of the power supply could of failed this is normally only a capacitor or resistor

Aug 03, 2013 | Denon AVR-2307Ci Receiver

1 Answer

No picture no sound loud humming sound for a short period when you turn it on than a orange light flashing at bottom where the blue light is when you turn it on.

AV cables reversed perhaps. Sounds like VIDEO (Yellow, Green, Blue or Red) cable is plugged into the AUDIO section. Perhaps you have switched the RED (Left audio) cable plugged into the RED (Component) Video cables. This would account for the loud buzz and since the set isn't getting an image it goes into standby mode. Just a thought.

Nov 25, 2010 | HP Pavilion MD5020N 50" DLP HDTV

1 Answer

Only 2 of the 4 buzz controllers work on the ps3

1. Hold the power switch on the 4 controllers till the blue light at the bottom of the controller stays on.
2. Once all the blue lights are on the controllers, hold in the button on the USB stick till it blinks.
3. Tap the button on the side of the USB stick and all 4 controllers will sync with the system.

Nov 08, 2009 | RTO Buzz Quiz Tv for PlayStation 3

2 Answers

My Harman/Kardon AVR 140 is stuck on stand by mode

I have the same problem on my AVR 1550 - its been bugging me for ages then it works again, then it doesn't ...

Aug 28, 2009 | Harman Kardon AVR 140 Receiver

2 Answers

Humming sound (speakers)when HK AVR is powered up.

In my case the buzz was only on front speakers. There are 3 capasitors (100uF/25V) very close to the cooling ribs of 3 regulators in the power supply. In my case the C922 was bad.

Apr 02, 2009 | Harman Kardon AVR 500 Receiver

2 Answers

Harmon kardon avr 125 shuts down

If you want to fix it:

It must be a contact problem arount the power switch, power cable, fuse or the condensator area.
Maybe you can se a black color on the board.
And checking the solderind points with a magnifyer can help too.

Thats all from that distence.

Nov 11, 2007 | Harman Kardon AVR 130 Receiver

1 Answer

All sound just dissapeared

you need to reset the receiver, hold the sure mode and tuner mode at the same time with the unit of(or in stand by).this will reset thwe receiver the only down fall is you will have to reset all of your settings.

Jul 01, 2007 | Harman Kardon AVR 340 Receiver

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