Question about Yamaha RX-V2700 Receiver

4 Answers

Left front main speaker level drops after being on for a few hours

When i first switch on my rx-v2700 the speakers are in balance, but after a while the level on the front left drops significantly ...have to manually adjust speaker levels to balance with front right on -5 and front left on +10

Have swapped my left speaker and connected to right output and it works fine so have ruled out speaker or speaker cable ....have used several optical input cables ...no change .....it does it on all inputs incl tuner which would suggest an internal problem in the receiver given i have ruled out speaker/cable ?

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  • tone_man Jul 05, 2008

    like i said in my post ..this isnt a problem in not being able to balance the speakers .....I know how to and can do that through the menus ...its more about the fact that they are in balance when i turn on the receiver, and after a while the left output level drops noticeably ...I then have to go into the menus to adjust left level up and right level down to get balanced output from my main front speakers. Have taken it to 2 authorised yamaha service centres and they cant diagnose any fault, and in my mind i have ruled out any faults with my speakers or other av source components ....

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Your problem is in the power amp. section the STK IC chip is defected already and the coupling capacitor there is leaky or dry. This is the most common problem,of imbalance function of channel.You better change that parts so performance will be better again, and need some reheating of that section.due to brittle,crack or cold solder..

Posted on Jul 05, 2008

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Hi tone_man

The unit has an audio path problem internally if it is doing it on all sources and inputs, proved as you say by the fact it happens on tuner as well. One thing to check is that any rec outputs you may have from RCA leads on the rear are not going shorted. I have seen this happen before, and will kill level to one channel.
other than that I am afraid it is off to an authorised repairer to get sorted.
I am more than happy to answer any other questions you may have about it, please get back to me here, or use the ASK function to go straight to me :) If you are still unsure, have problems, or we need to look at the situation more deeply, then before you give a rating for this advice, hit the ASK button Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards robotek

Posted on Jul 05, 2008

  • Graeme Ross
    Graeme Ross Jul 05, 2008

    Hi tone_man

    Your mind IS correct. Just wanted to confirm with you that you have no REC out connections off the back of the amp. The techs checking the unit are probably just not seeing the fault as you do. This is quite common, as in the workshop, bench test conditions are often not the same as the environment that you are running it. Ambient temp, the time for the problem to kick in, all these things make it hard to see a symptom if it is intermittent. Faults like this can be difficult to pin down, unless the have gotten to the bottom of it previously.

    If the unit is still under warranty(I am assuming it is) I would be addressing the problem with Yamaha Service in writing. From my career long experience with providing warranty support on AV products, they will probably ask you to send it yet again to an authorised service center, a preferred one that they will most probably nominate. Do what they ask. Then when the unit is on the bench there, Yamaha service management then have a contact point for their top experts to offer advice. I advocate this approach to you because I know this works. Being the third trip in for the same problem they cant pin down, puts the unit into the "too hard basket" They will oblige you with a replacement unit. Making a bit of noise about it with them will help to get some action from them.... "oil the squeaky wheel" so to speak.

    So don't take ownership of the problem, hand it back up to Yamaha. They are geared to sort it out for you.

    regards
    robotek




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Run the speaker test mode :

While running the speaker test tone to balance your speakers, you cannot adjust the balance of the Main speakers independently. The speaker test allows you to balance the sound (dB) levels of the Center speaker, Rear Left, Rear Right speakers to match the level of the main speakers. So, the first thing you do is press the [TEST] button on the remote. Next, adjust the [MASTER VOLUME CONTROL] until you can adequately hear the level from the main left and right speakers. Then, as the tone travels clockwise to each speaker, listen carefully from your main seating position in the room to determine which speakers (if any) need to be adjusted in level (either up or down) in order to balanced the sound to the main speakers output. Then adjust the Center, Rear Left or Rear Right speakers accordingly until the proper balance of level is attained. If you would like to change the level between the mains, you can use the [BALANCE CONTROL] either located on the front panel of the receiver or in the Set-Menu. A common challenge people have is that they try to adjust the main speakers to match the center or rear levels. If your center speaker is louder than your mains, You cannot adjust the main level up, you need to adjust the center speaker level down. All speakers need to be adjusted to match the main level.

Posted on Jul 05, 2008

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Volume Potensiometer may need dismantle and clean with special solvent

Posted on Jul 05, 2008

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