DAPAudio PA240 Owner's Manual page 16

Problem
No lights illuminates when the
POWER button is pressed.
No sound is heard
The unit's output is intermittent or
continuously buzzing
No output from one or more
channels
Fuse often blown
The LED bar graph's output is
normal, but there is no output
at load.
Overload LED keeps blinking
Cause
1.Is the unit plugged into a live
outlet?
2.Was the AC fuse opened?
3.Was the DC fuse opened?
1.Check if the audio source was
connected?
2.Was the audio source operating?
3.Is the volume turned up?
4.Are the speakers connected
properly?
Check if the AC power supply is
correct
1.Is the audio source operating?
2.Is the volume turned up?
3.Are the cables not defective?
1.Was the volume turned to full?
2.Were the speakers connected
correctly?
3.Were the wires of the speaker
connected correctly?
4.Is the impedance of the speakers
correct?
5.Is the speaker good?
1.Is the connection of the output
terminal ok?
2.Is the connected load too heavy?
3. Is the input signal too loud?
14
Solution
1.Load outlet
2.Replace AC fuse
3.Replace DC fuse
1.Connect to audio source output.
2.Operate the audio source.
3.Turn up the volume.
4.Correctly connect speakers.
1.Operate the audio source.
2.Turn up the volume.
3.Replace the signal cable.
1.Turn down the level volume.
2.Connect the speaker correctly.
3.Connect the speaker wires correctly.
4.Connect the matching output terminal
or replace with the matching impedance.
5.Replace the speaker.
1. The unit self-protection was worked,
please press the power button to off
wait for a time, is normal?
2. Check you connector's anything is
normal?
3. Perhaps over load or deviant operation,
cause this unit's DC fuse open, please
call a qualified technician or consult an
authorized.
1.Connect the speakers to the proper
output terminal.
2.Reduce the total load and keep the
impedance matching.
3. Adjust the signal level control