Why does working indicator is off?

• Main power plug not inserted correctly，Examine power supply and wire connection.
• Fuse is broken，Replace with fuse of the same specification.
• Internal machine breakdown，Contact sales agency or sales departmen.t

Why does sound Distortion?

• Output Level of output signal is too high,Turn volume knob to appropriate position.

Why has overloud Noises?

• Earth cable of input signal is disconnected or in loose contact,Replace or reconnect signal line.
• Internal machine breakdown,Contact sales agency or sales department.

I feel Poor Sound field orientation,why it is happend?

• Left and right sound track of input and output are reversely connected, or anode and cathode terminals are reversely connected,Reconnect wires according to the requirement.