Question about Audio Players & Recorders

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I have a Harman Kardon AVR 3600 and am experiencing intermittent video and audio "dropout" while viewing material from the HD cable box. The trouble starts after the unit is on for perhaps 10-30 minutes. It is on an open shelf so ventilation is a non-issue. The box is hooked up via HDMI and is plugged in the port as described in the manual. The receiver is hooked into the TV via the HDMI monitor slot. I recently returned the unit I purchased 3 months ago to HK and received this new unit yesterday and have the same problem!! There is no "dropout" when the HD cable box is connected directly to the TV. No dropout yet from the Bridge III or the game connection.

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  • annpat315 Apr 15, 2011

    I tried both offered suggestions, unplugging the receiver and resetting the system, neither corrected the problem. There is no dropout with the Bridge for the ipod and the game systems seem to operate ok. Since this is the 2nd brand new AVR 3600 I'm testing could the problem lie with the HD cable box or the signal strength? When on, the picture quality seems very good.

  • annpat315 Apr 15, 2011

    TV: Sony 46" LCD XBR5, has 1,3 HDMI on back, HDMI 2 on the left side
    Cable Box: Scientific Atlanta Explorer 8300 HD

    The dropouts occur at any point. After a few minutes or after an hour. Sometimes the audio for 1-2 seconds, sometimes both audio and video for 1-2 sec. and now, st times, both the audio/video don't return at all with out rebooting

  • Vishwa Nov 19, 2011

    My HK AVR 3600 is exactly doing the same thing for a last few months. Now dropout is happening almost like every 2 minutes. Did you find any solution to your problem?

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3 Answers

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  • Master
  • 2,098 Answers

Hi annpat315,
There was no problem with your TV, Amplifier and to your HD cable box. This was caused by weak signal chained from your HD cable box to your Harman Kardon reciever and then to your TV. The picture/sound will be fine first then became worst after an operation because the source withdrawing to much current to generate the signal.
You need the HDMI BOOSTER to enhance the the transmission of signal and have a much quality of picture and sound without an interruptions.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Posted on Apr 16, 2011

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  • Master
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Hi -

It's definitely not a problem with the cable box or signal strength, but I need a little more information from you to assist me in solving this problem. As you can connect the cable box directly to the TV without any problem, it's more likely to be an HDMI compatibility problem between the TV and the HK receiver. Please could you let me know he following information:

- Brand and model number of TV
- Brand and model number of cable box
- Are there any specific points when the video and audio drops out, e.g. when a channel cuts to a commercial break?
- How long are the dropouts - a second or two or does the signal not return after the dropout?

Personally, I would always connect the cable box directly to the TV anyway and run a digital optical cable from the cable box to the receiver for audio - unless there are specific reasons for connecting the cable box via the receiver, e.g. limited HDMI inputs on the TV.

It could be an HDCP issue, a change in the audio signal type from the cable box, or it's possible there is an unresolvable compatibility issue between the receiver and your specific TV. If you can let me know the answers to the questions above, I can hopefully determine where the problem is or at least make some suggestions which should help.

Thanks,
BElectric

Posted on Apr 15, 2011

  • DILLIGAF
    DILLIGAF Apr 16, 2011

    Thanks for getting back to me. Unfortunately, you replied while I was sleeping and I missed the default time limit for replying to you so you've probably received another answer as well by now.



    This isn't really a 'fault' with the equipment. You could try an infinite number of this model HK receiver (and other receivers) and still have the same problem. You should be able to resolve the issue by changing the audio setttings on the cable box and/or receiver, but failing that, you will need to connect the cable box directly to the TV with the HDMI cable and run a digitial optical audio cable from the cable box to the receiver for surround sound audio.



    I suspect the dropouts are occuring when the receiver detects a different type of audio signal from the cable box and switches to a different audio processor. Your receiver is probably set to auto-select the audio format and this can change during viewing. This is most likely to happen when you switch channel, a new program starts, or the channel cuts to a commercial break, but it can also happen during a program. This would explain the varying times between dropouts. You're not getting the dropouts from the game system or the iPod bridge as the audio format from these is constant.



    There is a momentary delay while the receiver switches to a different processor and the connection to the TV is temporarily lost. Following the switch the receiver may be failing to output the audio and video signal to the TV again or the TV may be failing to pick up the audio and video signal. You may also notice the surround mode displayed on the front of the receiver changes when the dropouts occur?



    You could probably resolve the problem without rebooting the receiver by switching to a different input on the receiver and then back to the HDMI input from the cable box. It may also be necessary to switch the TV to another input, then back to the HDMI input before the audio and video returns. Obviously, this isn't ideal and you don't want to be doing this all the time while watching a program or movie, so this is what I suggest you do . . .



    1. Try a different audio setting on the cable box.



    - Switch on the TV, receiver and cable box so you have the output from the cable box on the TV

    - Press the SETTINGS key on the cable box remote twice to open the GENERAL SETTINGS

    - Use the DOWN arrow to highlight AUDIO: DIGITAL OUT

    - Press the RIGHT arrow to change the digital out setting **

    - Press the yellow A key to save the change

    - Press EXIT to close the menu



    ** If the cable box is set to Dolby Digital, switch to Other (for Linear PCM / LPCM) and vice-versa.



    If you are still experiencing audio and/or video dropouts, change the cable box back to the original audio setting, then turn off auto-select on the receiver for the cable box input.



    2. Change the surround mode on the receiver for TV viewing.



    - Switch on the TV, receiver and cable box so you have the output from the cable box on the TV.

    - Press the SURROUND MODE key on the HK remote to display the surround mode list.

    - Select STEREO (5CH or 7CH Stereo - depending on how many speakers are connected) or select MOVIE and try different audio options (Logic 7, DTS, Pro Logic II or IIx)



    You need to choose an option which gives you audio from all of the connected speakers. With auto-select switched off, the receiver wont be able to switch audio format during viewing.



    If you've tried all of the above and you are still having audio and video dropout, there really is no option other than to connect the cable box directly to the TV and then connect a digital optical audio cable from the cable box to the receiver for surround sound audio. I would suggest doing this anyway.



    I hope this helps. If you need further assistance or explanation of anything I've written above, please let me know.



    Regards,

    BElectric.

  • DILLIGAF
    DILLIGAF Apr 18, 2011

    Hi. Just wondering whether you read my last message and if you still need assistance with this problem?

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  • Audio Player... Master
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Hello
The dropout you describes here is related to its buffer section. There is a section that buffers the HDMI signals, like in our computes. and si composed of ICs. If any one of them wond function well, the 'Buffer Under Run" process will be interupted, and the video will aso effected. The only way to confirm is to reset the processor. The processor reset method is described in its user manual. Anyway I'll give it to you here. Dual 24-bit, twin core Texas Instruments DA 710DSP processors, at 192Khz/24bit Analogue to Digital and Digital to Analogue converter type of processor is used in your system.
To reset processor:

First tun off the

Main Power Switch and unplug the AC power cord for at least

3 minutes. Plug the cord back in and turn the receiver on. If this
doesn't help, reset the AVR.

NOTE: A system reset erases all user configurations, including

video resolution, 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 3600, place it in Standby mode (press the frontpanel

Standby/On Switch so that the Power Indicator turns amber).

Then press and hold the front-panel OK Button for at least 5 seconds
until the RESET message appears.
Check after this process. If it helps you, you are lucky. If not, the set should be service by Authorised Herman Cardon service center, because, no user servicable parts in this section, and to service this section, very sophisticated testing equipments must available. These equipments can't afford to alocak serivce technican at all, because of it high cost.
Check this first. If you have some doubt, refer to its user manual too. OK.

Posted on Apr 10, 2011

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