Russound D850 사용자 매뉴얼

1. Remove the original source input cables and replace with a headphone-to-

RCA cable connected to the portable device.

2. Choose some music to play. An Internet Streaming source (e.g. Pandora) is 

best because it will play a constant audio stream.

3. Verify that the amplifier zone turns on and off reliably when connecting or 

disconnecting the RCA cable from the portable device according to the delay 
period timing that is configured for that zone. 

4. If the signal sensing is still not reliable: 

5. Disconnect all cables, including speaker connections and RCA connections. 

6. Set the delay of Zone 1 to the shortest time setting.

7. Reboot the amplifier.

8. Make sure music is playing on the portable device.

9. Connect the portable device to Zone 1 Line Input Only. 

10. The Zone 1 amp should turn on.

Zone LED is blinking red/blue - This indicates a short-circuit condition on 

the wiring.  Power down the amplifier and verify all speaker wiring connections 
both at the amplifier and at the speaker. Make sure no stray strands of wire are 
touching. When the wiring has been corrected, turn the amplifier back on.

Zone LED is red - This indicates an overheating condition.  Verify that the 

amplifier is receiving enough ventilation.  Separate the amplifier from other 
components to allow more ventilation or add a cooling fan if needed.

Note: Both of these conditions will auto-correct themselves when the trouble 

condition has been removed.  The amplifier will then resume normal operation.

If you experience more problems or have questions, please contact  

Russound Technical Support for further assistance at1-866-888-7466, M-F, 
8:30AM-7PM ET.

• Check the input signal path
• Check the audio cable connections between the source and the amp
• If the source is a variable signal, make sure it is turned up

The D-series amp zone turns on, but not consistently 
• Check the input signal level. It may need to be turned up
• Check the amp gain levels. They may be turned up too high
• Try connecting a tablet or smartphone with a headphone-to-RCA cable into  

     the amp zone input as a test

The D-series amp zone is always on
• Check for voltage issues and/or ground loops that could be affecting the  

     signal sensing circuit – See Below:

Ground loops in the system with the D-series amp can the reliability of 

the signal sensing. Voltage introduced into the amplifier by way of ground 
loops, or EMI-RFI noise, or other electrical noise on the power input, could be 
interpreted by the signal sensing circuit as an input signal. In this case, the 
amplifier may not be able to tell the difference between the actual signal and 
the electrical noise in the system, so the sensing ability of the amplifier may be 
erratic or unreliable. 

There are products on the market to help reduce electrical noise or ground 

loops, such as a Ground Loop Isolator, which can be used to block or reduce 
problems with the input signal path and make signal sensing more reliable. 

In addition, there are even more considerations such as the length of RCA 

cables being used (shorter is better) and making sure the amplifier and the 
sources are on the same power source to reduce ground loops and other 
electrical issues. 

Test Example
A good way to test the amplifier zone input and signal sensing is to use a 

portable device such as a tablet or phone. This type of test source is not 
plugged in to power therefore should not introduce any ground loop or 
electrical noise.