Fosi Audio BT20A, Руководство пользователя, Страница: 7 / 14

4: Can I connect a turntable to BT20A amp, why is the
volume is extremely Low?
• As for the turntables do not have a built-in preamp, you need to
add an external phono preamp before connecting BT20A.
• As for the turntables which have a built-in preamp, you need to s
witch the preamp on before connecting BT20A.
5: Why does my power indicator not light up?
• Please check that the AC power cord is securely connected to the
power supply and to an AC power outlet.
• Please check that the AC power outlet is supplying power, make
sure the power LED on the power supply will stay on.
• Please replace another power supply and try it again.12-24V DC
power supply are suitable.
• If you make sure the power supply is defective, please contact us
for exchange.
6: Why does the sound is cracking or make a lot of
electric noise?
• Please make sure all the cables completely pushed into the
devices, incompletely connection will cause this cracking.
• Please remove all the inputs then check whether cracking noise
disappear or not, the cracking maybe from the audio source or
input cables.
• If you are not using the original factory standard power supply,
please replace the power supply before testing. Many power
supply in the market have large interference coefficient, which
will cause a lot of current sound.