9
The lamp does not light up and no sound is produced even
when the POWER switch is pressed
The pilot lamp is ON, but no sound
No sound is produced from the speakers
The volume from the left and right speakers differ
When stereo, the left and right positions of each musical
instrument are reversed
Hum or noise
The presence of the bass sound is bad
TROUBLESHOOTING GUIDE
Is the AC power cord disconnected?
•
Are the speakers connected properly?
•
Are the inputs of the mixer and pre-amplifier switched
properly?
•
Are the volume adjusting knobs of the mixer and pre-
amplifier turned excessively?
•
Is the BAL/UNBAL selection switch of the unit set
properly?
•
Is the speaker cord short-circuited somewhere?
•
Are the ventilation on the top or side of the unit OK?
Avoid closed-type rack mounts to allow proper ventilation.
A
As the protection circuit is operating, turn OFF the
POWER switch once, and correct the cause.
•
Is the mixer or pre-amplifier output balanced?
•
Is the level knob of the unit adjusted properly?
•
Is the INPUT LEVEL selection switch of the unit set
properly?
•
Is the connection of the left and right speaker cords
reversed?
•
Is the connection of the cord to the INPUT terminal
reversed between channels?
•
Are the speaker output terminals and connection cords
connected properly?
•
Is the OPERATION switch set properly?
The pilot lamp
blinks in red
The pilot lamp
lights up in red
MAIN SPECIFICATIONS
TROUBLESHOOTING
GUIDE