Wyred 4 Sound STmkII Series - Manual (Page 10)

pg. 8
Troubleshooting
No sound?
Always check the volume level before starting to play music. Damage to the
amplifier or connected components due to an unintended musical blast will not be
covered under warranty.
Feel free to test for audio output at any time during this process if you find and
correct a potential problem. If you have your source and speakers connected yet
music will not play, check the following:
1. Make sure that the Voltage Selector Switch is in the proper position. Also be sure
to check the fuse which is located in the IEC inlet.
2. Verify that the power cord is securely plugged into the wall and the ST
mkII
.
3. Check the power switch on the rear to verify that it is in the “on” position. Make
sure that the blue light is on around the power button. If the light around the power
button is green, the power button will need to be pressed once to turn the amp on.
4. Make sure that the input select switch is in the proper position for the input type
you are using. (ex. RCA/XLR)
5. Next, check to see that your source has the correct input selected and the cables
are plugged in securely. Also be sure that the volume is set to an adequate level for
the output to be audible.
6. If the input select switch is in the proper position and you are confident that your
source is sending a signal but have no sound, try inspecting or replacing the
interconnects and speaker cables.
If you are still experiencing problems and have exhausted your available resources
and time, please contact the dealer/distributor that you purchased the product from
for additional support.
Got hum?
Is there too much hum coming out of your speakers? To clarify, with your ear
right next to the tweeter of your speaker it is normal to hear a small amount of hiss.
If the noise is easily heard at a distance, try putting your source on mute. If this
eliminates the noise, then it’s inherent in the source. If muting your source doesn’t
disconnect the outputs when muted, and the noise still exists while muted, try
disconnecting the inputs to the amplifier. If the noise is still there when the inputs
are disconnected, then your amplifier may need service. If the noise is not there
when the inputs are disconnected, try putting a cheater plug (ground isolator) on
one component at a time in order to locate the source of the possible ground loop.
Once the source is located you can contact the manufacturer for further information