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Losing Preset information

My RSX-972 no longer retains the programmed settings if I switch off the unit at the power button. It used to retain all the settings previously. Is there a battery internally that I need to replace, or is the problem something else?


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Hi Cool
I had the same problem. I think it's a broken 5.5V 0.1F supercap.
Losing Preset information - df3be5e5-904c-4043-b94d-3de4b9b64c3d.jpgI replaced the part with this:
It's on the PCB in the middle of the amplifier.
I will test it the next day's, but I think that was the problem.

Posted on May 10, 2013

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Ho Cool

It will need a supercap or back up battery replaced. Do you know what these look like? Will be in proximity to central controller chip(on the front panel alot of the time. Looking for a cct to tell you exactly where.. back to you soon.


Posted on Mar 24, 2008

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I have a Kenwood stereo integrated amplifier R-42XL that I bought 25 years ago. It has served me very well and still does intermittently. Sometimes when I plug into the mains the red light on the volume...

our company has always said anything can be fixed its only the price that varys i think you have a fault in the switching mech as the unit is 25yrs old they didnt use digital switching back then i think your unit has the old spring loaded power button the problem is that the small spring behind the latch comes loose after many years and needs to be set correctly so take it to a shop and see if they know about spring switch resetting to see if this is deffinitly the problem push the button in hard if the power comes on but goes of as you realease it theres ya fault

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Did you try this....

In the event of a power outage, the RV-8 will display a BROWN
OUT!! PRESS STANDBY message. To turn the unit on, use the
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When set to OFF, the RV-8 will attempt to function during a
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If this makes no difference, it seems that it would need to go to the repair shop.

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5 Answers

Yamaha DSP A-1000 input selector switch not working properly

As that unit is well over 5+ years old, I seriously doubt the part is available any longer. I doubt that you will even find a used part, and even if you do, it will probably be as bad as your switch. As I have worked on audio for over40 years, I would use LPS 2. It is a lubricant. Do not try this with WD40 or similar. Just spray the LPS on the wafers, or through any open holes in the switch. You just need a little. If you just squeeze the button, you will see just a little bit of foam. That is all you need. No more; no less. Rotate the switch from from left to right and back again multiple times. Try that. BTW, no manufacture uses these mechanical switches any more.The controls are now called Rotary Encoders, which basically are inputs to a display microprocessor IC(a computer within the new product) which in turn controls the inputs of a switching IC. It's the same as your old switch, just electronic, and much more complicated. If you need more information, or would like to inquire about repairing your unit, please visit my website at You may contact me there. Thank you.

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Hello amos78

First, perform a visual inspection at the back of the unit and verify that speaker wires are not loose or shorting out with another connection. Find the impedance selector switch and verify that it is set to the proper position according to your speakers' impedance. It has to be all the way up or down, never in the middle. (Warning: Do not move the impedance selector while the receiver is powered. Make sure power is OFF on in standby, otherwise receiver will be damaged). Try power ON.

If these actions do not cure the problem, disconnect all speakers and try power ON again.
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Hope this helps you. Let me know.


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