Question about Kenwood Audio Players & Recorders
Select an input that is not connected, for example select CD with no cables going to the CD input on the backside. Will you then hear equal humming on both channels? If so, the amp stage is ok,
and the problem lies in the signal level circuitry.
Open the cover and use a plastic (insulated) stick to touch suspectible cables and components. When the sound returns, you've found the cause. Resolder or reseat the component/cable/card.
Use the insulated stick, NOT your fingers!
Posted on Jan 01, 2008
SOURCE: Speaker output
My unit does the same thing, I read online to install a RCA Patch cord from Main-In to Main Out and it worked.
I contacted Yamaha and they wanted to charge me to fix the issue and they will not fix it under warranty because I did not buy the unit from a authorized Yamaha dealer. Obviously a design flaw.
Posted on Jan 07, 2008
Does the gtr still work on the unit? The mic jack may be bad / dirty and not routing regular audio. Try plugging the gtr cord in and out a few times. Or inspect the jack itself for tarnish, bad solder joints. Fine sand paper can be used to clean the contacts on the jack, if it's not a sealed jack.
Hope that helps...
Posted on Mar 24, 2008
unit needs repair. Look at the b speakers. Conect a speaker or two to the B position. If you have no sound than your surrond sound is ok and the unit is bad. Sound comes directly into the b speaker and not threw the surrond system. My 6070 has a cold start up problem. no sound. time to purchase a new one. to costly to repair.
Posted on Feb 09, 2009
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Feb 19, 2012 | Audio Players & Recorders
It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.
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