Question about RCA RT2390 System

2 Answers

With the volume at 40( and now even lower) and audio "spike" causes the system to shut off...What's happening?

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  • proverbs3_5_ Aug 28, 2010

    Thanks for your advice. I found that I had one of the speakers wired incorrectly. I have since put the wires in there respective ports and waaalaa the system cranked out sound at full volume with on shut downs...

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2 Answers

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  • RCA Master
  • 17,130 Answers

It can be the input is bringing the HF noise to falsely trigger a high currrent output that incidentley cuts off the amp to protect.
If after removing the input the amp does not hum or cut off when the volume is turned then we must check on this unit.
However even after removing the fault appears, check the load of the speakers connected. Repair /replace if bad.
If not there is a power filter fault that is issuing the noise to the circuits. check for poorr value of filter capacitors in the main supply, the regulators to the pre amp or the filter capacitors to the preamp.
If the fault disappeared with the input source being removed , check the power supply of this unit.

Posted on Aug 29, 2010

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  • Master
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Shutdown will be caused by overvoltage on the input or shortcircuit/low resistance on the output. Remove the speakers one by one at the same volume level. If the problem persists with all the speakers removed the unit is faulty and needs to be sent in for repair.Did you change or reconfigure/rewire the outputs/speakers recently?
If the resistance(impedance) on the output is too low it will cause the unit to shut down. Wiring additional speakers incorrectly will cause this. If a speakers' voice coil is starting to fail you will get the same result. Remove one speaker at a time until the unit no longer shuts down in order to identify the channel that is causing the problem.

Posted on Aug 28, 2010

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I set the volume to 40. After a little while the volume starts dropping down. If you do not turn the volume back up the volume will eventually go to zero all by it self and turn off the system.


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From page 57 in the manual...

• Turn down the volume.

• Lower the 40 Hz and 125 Hz equalizer levels in the Manual MCACC setup on page 34.

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Disconnect the remote control from the subwoofer. Then what you need to do is unscrew the remote volume/bass control unit (4 little screws). Swab the contacts on the volume dial with a cotton bud (q tip) denaturated alcohol or even perfume will work. Make sure you do it several times until all the slight dirt that is causing the volume fluctuation/spikes to happen. Also remove any remnants of cotton that might get stuck.Now you'll have it working as new as long do not cause any other damage to the unit.

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