Question about Harman Kardon AVR 140 Receiver

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Harman kardon avr 140 - all displays work but no sound

Checked all connections, unplugged, etc. All the displays work, but nothing else does -- no sound from bridge, tv, cd player, or dvd player. It was working perfectly, then resent the ipod twice, then said the bridge was unplugged. When we switched to the tv, nothing worked. I'm going crazy trying to figure this out.

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I have an HK AVR140 all of the displays work, even shows when a digital connection from the Blu-Ray player is connected but no audio comes from the speakers! I found some information that HK does not have DC protection so when there is a problem muting Circuit is initiated on the main Amp. I called HK and they want me to send it in to a service dept that is not close at all. Any ideas? Or is there a way to by-pass the muting circuit somehow?

Posted on Oct 31, 2010

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Posted on Jan 02, 2017

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2 Answers

HOW TO RESET HARMAN KARDON AVR70


Hi, Try this. Hope this helps and I have the link here to the manual.
Processor Reset
If the AVr behaves erratically after a power surge, first turn off the front-panel
main
power switch and unplug the Ac power cord for at least 3 minutes. plug the cord back
in and turn the AVr on. If this procedure doesn't help, reset the AVr's processor as
described below.
note: resetting the processor will erase all user configurations, including speaker and
level settings, and tuner presets. After a reset, reenter all of these settings from your
notes in the Appendix worksheets.

To reset the AVR's processor:

1. press the front-panel Standby/on switch to place the unit in the Standby mode (the
Standby Indicator led will turn amber).
2. press and hold the front-panel Standby and memory/folder buttons until the reSet
message appears on the front-panel message display.
3. press the memory/folder button again to reset the AVr's processor.
If the AVr does not function correctly after a processor reset, contact an authorized
harman
kardon service center for assistance.
to locate an authorized service center,
visit our web site at www.harmankardon.com.

https://www.harmanaudio.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw409ee4c9/pdfs/AVR700NEW_OM_EN.pdf

Jul 28, 2016 | Harmon Kardon Harman / Kardon Avr 70...

1 Answer

Install problems at AVR 142


ensure that you have the reciver connected to a display monitor e.g t.v. set, there you'l be able to make all the necessary ammendments.use the video out or use the HDMI out to connect to your t.v.
which speakers are using for the avr 142?

Dec 24, 2009 | Harman Kardon AVR 140 Receiver

2 Answers

I have a harman kardon avr 745....looks frozen


My device is AVR 645, but AVR 745 has the same power regulator board and you could check, if the problem is there.
(AVR 645 volume blue light was not pulsating)
When device is turned on, it shows all display indicators,
no blue light on volume button and no response to any remote or front panel buttons.
Reason for failure:
No 3.3V and 5VD voltages.
I checked bridge rectifier D701 on power regulator board.
One of the diodes was shorted. Also fuse F702 was blown.
Original D701 is KBU6G, but because regulator board is a bit difficult to get out, I decided to use KBU8G. The only difference is Amps rating 6A versus 8A.
Be sure to use SR-5-3.15A fuse to replace F702 and use heat sink paste (you know where) when board is reinstalled.
There is large heatsink in the middle of the receiver. Power regulator board is mounted on the right side of that heatsink. It is down there near the front panel and to get it out you most probably first have
to remove two PCBs hindering access to some regulator component screws. Here are pictures to clarify situation:

harman-kardon-avr-745-looks-frozen-igzigj2finjgh1nndvq1cugs-5-0.png harman-kardon-avr-745-looks-frozen-igzigj2finjgh1nndvq1cugs-5-1.png

Oct 26, 2009 | Harman Kardon AVR 140 Receiver

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

1 Answer

No sound,no video,front panel display will display.harman kardon


Check your audio settings on the main menu of the receiver. The audio input should be set to "auto" Next, make sure you don't have the unit in "6 channel input" mode or "direct" mode. This is usually a small button on the front panel. If you check all this and you still have a problem, post a comment and I will help you troubleshoot some more. Hope this helps

Jun 30, 2009 | Harman Kardon AVR 140 Receiver

3 Answers

Harmon kardon 745 displays "unlock" no sound for tv or movies


I also had this UNLOCK message on my Harman Cardon AVR 130.
The reason for this error was - in a hurry I've plugged the optical input into optical OUT! Double check that your connections in the back are correct and hopefully it fixes your problem.

Cheers,
Sergey

Jan 11, 2009 | Harman Kardon AVR 130 Receiver

1 Answer

Harman Kardon AVR 40 no sound


Check the fuses - there may be one inside the box as well. May also be a bad transformer. You can get a multi-meter at Home Depot and lookup how to check the power at the transformer.

Oct 19, 2007 | Harman Kardon AVR 100

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