Troubleshooting/QA
Q: All cables are connected, but no sound output?
A: 1.
Check if the POWER indicator is on, and turn the VOL knob
clockwise to turn on the POWER if it is not. When the
indicator light is still not on, you can find a laptop power and
connect to test whether it is the machine fault or a power
failure;
2.
If the indicator light is on, check whether the VOL knob is in
the minimum position. If so, turn clockwise to normal Volume;
3.
If both of the above are normal, check the input device if it is
paused, mute, or the volume is minimized.
Q: Why do loudspeakers make a lot of electric noise?
A:
If you are not using the original factory standard power supply,
please replace the power supply before testing. Many power
supplies in the market have large interference coefficient, which
will cause a lot of current sound.
Q: Why doesn’t the SUB FREQ knob control the sound?
A:
The SUB FREQ knob is to adjust the frequency output of
subwoofer, please make sure the SUB/PBTL switch on the front
panel is selected to SUB.
Q: Why does the sound break?
A:
when the output power exceeds the normal power of amplifier,
there will be a large distortion. you can turn down the front
volume or the power amplifier volume, then it is ok.
Q: When connecting RCA line input but not playing music,
why it has interferential sound?