dB Technologies ES 503 User Manual page 35

English
Quick Troubleshooting
The display does not light up when switched on.
 Check if the power cable is plugged into the Mains Input.
 Check if the mains power supply is providing current.
The display lights up, but there is no sound coming from the cabinets.
 Check the cables connected to the Left and Right inputs.
 Check if the signal sources (mixer, keyboard, CD player) are on.
 Is the Gain knob turned up?
 Check the speaker cables for damage.
 Check if the Speakon" connectors are fully engaged in their sockets (rotated to the right). They must be locked in place
to establish an electrical connection.
.
Sound seems distorted
 Check the LED displays on your mixer. They should not be constantly in the red. If necessary, reduce the volume at the
mixer.
 If the LED displays on your mixer are in the green, turn back ES channel input volume.
Annoying hum
 Check the cables connecting the source of the audio signal to ES . Replace any damaged cords.
Important TIPS
Do not expose electronic circuitry to moisture!
To ensure proper ventilation, make sure the subwoofer is placed a sufficient distance
away from walls and isn't covered by curtains
Provide it with optimum input signals!
Avoid distortion!
Avoid ground loops!
