Question about Cambridge Audio Azur 840A Amplifier

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The volume jumps up and down when i turn the volume up .also the balance tuns completely left on its own

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Years ago the volume and balance on amps were on seperate circuits. But these days they are on one. It sounds like this problem is all down to an IC in the pre-amp stage. If you trace the connection from the volume control to the PC board you will find this chip. If you come accross more than one, put the code numbers into Google and see what they do. If you see one the at deals with volume and balance, you have got the culprit!

Posted on Sep 21, 2010


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Related Questions:

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Volume balance between the speakers as there doesn't seem to be a balance left/ right switch.

Check all of the connections affecting the two channels. Speaker wires, inputs, outputs, etc. A poor connection can have resistance that will affect proper balance between channels.

Also check your volume and/or balance controls for proper tracking. With the unit completely turned off, turn the volume control many times from extreme counterclockwise position to clockwise position. Ditto for any and all speaker switches. If none of these steps clear up the anomaly you have a difference in gain between amps responsible for unequal outputs and the unit will need to be troubleshooted for bad cap and/or resistor causing the anomaly.

Mar 10, 2015 | Audio Players & Recorders

1 Answer

I am not getting equal sound from right as I am on left. The right is a little less on volume and wattage meter,when I balance it fully to right and turn the volume up, the sound gets static and scrat

Check your connecting terminals on both ends for that channel that the polarity is correct and firmly connected. If you find no problem with that, then swap the connections...if the problem repeats to the other side then the speaker is damaged. If the problem stays on right side then it is the unit and needs to be investigated further.

Dec 22, 2014 | Pioneer Sx-1080 Monster Receiver Beautiful...

1 Answer

Balance control

The channel that is weak will either have a faulty transistor or a bad capacitor on it. Most engineers would test it by injecting signals into the circuit at different points. Working backwards from the front end. When the signal goes weak, you have found the faulty stage.

Jul 02, 2017 | Yamaha RX-V690 Receiver

1 Answer

Car stereo speaker only works with volume turned way up

try the fade button, if its a 4 speaker system you have balance left and right, and fade front and rear.

Dec 21, 2011 | Clarion Car Audio & Video

1 Answer

How to use jvc kd-hdr20 car stereo. I need to know how to fix balance,bass,bluetooth,ect.

To pair a bluetooth device with the radio, turn on the Bluetooth function of the device. Then press the SRC (source) button on the receiver. Select BT Audio or BT Phone, depending on the device you want to pair with the radio. Use the up/down arrows to select New Device and press the down arrow. Select Open and then press the down arrow. Then enter the PIN by using the left/right arrows to select a digit and turning the volume knob until the correct digit is entered. (For some devices, you need to enter a specific PIN. Consult that device's manual.) Press the down arrow to set the PIN. Enter the PIN in the device you are pairing to the receiver (if it doesn't have a required PIN). Wait for the message "Connected" to appear.

To use the device in the future, press SRC and choose the appropriate Bluetooth type. Then use the right/left arrows to select the registered device. Press the down arrow and then use the right/left arrows to select Connect and press the down arrow. (See the manual, link below, for setting the autoconnect or autoanswer.)

To adjust the sound system balance, press and hold Menu to open the menu and then turn the volume knob to Audio. Press the center of the Volume knob. Then navigate to balance and adjust the unit as needed.

The manual for the KD-HDR20 is available from JVC on the product support page: . The direct link to the instruction manual is .

I hope this helps.

Cindy Wells

Oct 13, 2011 | Car Audio & Video

1 Answer

Tried to turn the volumn down but it would not instead it went up had to use the remote to turn the volumn down plus i do not get a equal balance with my speakers rear center is always the loudest and I...

volume up not down is not normal there is a problem with the variable resistor (volume nob) every thing else is normal thats dolby certain sounds make them louder where as other sounds make them quieter it helps make you feel more emersed in the audio

Jan 11, 2011 | Pioneer VSX-D498 Receiver

1 Answer

My left speaker is louder than the right one.... i have checked the left-right balance on my player and also the connector pins at the back of the sub... eveything seems fine... please help..

This problem occurs a lot i even have this problem with mine. What i did to fix it is turn down the volume on the computer to in between 50-75. next set the balance on the computer's volume setting to a little more to the right one. It does take a little testing to see how far to the right you want it. I did this with mine and its like there is nothing wrong with it.

Sep 29, 2010 | Logitech Z-2300 Computer Speakers

1 Answer

Head Unit of boat stereo cutting out at higher volume

check your ground wire ..
then check battery has enough charge..
usually fault is in where your stereo is connected to your ground source.. good luck ,if no luck try your checking your speaker wires for a short..

May 14, 2009 | Kenwood Car Audio & Video

1 Answer

NAD 302 stereo balance problem

I would replace the output transistors of the bad channel and any very low ohm resistors associated with them.
Whilst youre in there replace the electrolytic caps in the power amp section. Caps are cheap and plentiful.
I dont know what the rest of the circuit looks like but there might be a need to balance the DC offset after replacing transistors. and carry many good replacement transistors.

Dec 30, 2008 | Audio Players & Recorders

1 Answer


WOW never heard this one . You might check the volume down button on the tv to see if it is depressed in . What is the model # and do you clean the picture tube with windex ? Maybe some of it has seeped down onto the control board and has gummed up the volume down button. Good luck

Mar 03, 2008 | Sony KV-27V42 27" TV

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