Question about Kenwood KR-V990D Receiver
Hello, I have used and loved my Kenwood KR-V990D for quite some time, with no problems. I am not sure if one of my roomates bumped it or something (not likely because the unit is very secure), but the sound coming out at my comfort level (-35dB) is now non-existant, and in order to hear the speakers at all I have to turn the volume up to the -10db--0db range, which is normally in the region where either my ears or the speakers would break. I never abuse my sound, never crank it up all the way, and have no reason at all to suspect that anything is blown. What is going on? I have checked all connections countless times, and I cannot get the volume back up to the normal level. It is literally as if some protection mode was put up, and when the volume is turned up to maxx (0db), it is only slightly louder than before when -45db would produce the same sound. Thanks in advance to anyone who can solve my problem.
Check all (and I mean ALL) of your front panel buttons. It sounds like someone has pushed the tape monitor button or something like that. Be SURE to turn the volumn down BEFORE you start pushing buttons. Good luck.
Posted on Jan 31, 2007
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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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